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Early Systemic Treatment

            Aron Goldhirsch, MD


            Department of Medicine
      European Institute of Oncology (EIO)
Oncology Institute of Southern Switzerland (IOSI)
International Breast Cancer Study Group (IBCSG)
Adjuvant Therapies
  for Women with Breast Cancer:
        Present and Future

Adjuvant Therapies are the most
 important field of medical oncology
…because - they lead to CURE saving
 more lives…
Adjuvant Treatments ...
         Why are they special?
•   Patient is free of overt disease
•   Assumption is that:
      residual microscopic disease
      same characteristics as primary
      similar responsiveness
•   In case of doubt:
      worse scenario
      most convenient for the patient
•   Impossible to check efficacy
Preoperative (Neo-Adjuvant)
                Treatments

• Treating more efficiently patients with locally
  advanced disease
• Information on efficacy & safety of new
  therapies during the short preoperative
  exposure


• I will not deal with these therapies due to time
  constraints
Adjuvant Treatments

• Historically, the first adjuvant treatments were
  ovarian function suppression (OFS) and
  chemotherapies (CTs)
• The overwhelming effects of CTs and the lack of
  clear advantage for OFS signed the misperception
  about what should be done
• Lacking knowledge about the target was the main
  problem
Relapse-Free Survival (A) and Overall Survival (B)
         According to Treatment Group




                       Bonadonna G. et al, N Engl J Med 332: 901-906, 1995
RFS and OS According to Treatment Group               N-




All 90 pts had endocrine non responsive disease!




                         Zambetti M. et al, Ann Oncol 7: 481-485, 1996
CALGB/CTSU – 49907
                                                             RFS by ER status

                                    Receptor Negative Tumors
                                         Receptor-Neg ative Tumors                                                         Receptor Positive Tumors
                                                                                                                              Receptor-Positive Tumors

                                      Relapse-Free Survival
                                           Relapse-Free Survival
                                                   By Arm
                                                                                                                            Relapse-Free Survival
                                                                                                                                Relapse-Free Survival
                                                                                                                                       By Arm
                          0.8




                                                                                                                 0.8
Proportion Relapse-Free




                                                                                       Proportion Relapse-Free
                          0.6




                                                                                                                 0.6
                          0.4




                                                                                                                 0.4
                          0.2




                                                                                                                 0.2
                          0.0




                                                                                                                 0.0
                                0      1             2           3           4     5                                   0    1             2           3              4      5

                                                 Years From Study Entry                                                               Years From Study Entry

                                           CMF/AC           N= 106    Events= 14                                                 CMF/AC           N= 218       Events= 21
                                           Capecitabine     N= 97     Events= 34                                                 Capecitabine     N= 209       Events= 26


                                        No Endocrine Therapy                                                                    Endocrine Therapy
…understanding the
    Need for Tailored Treatments for
          Individual Patients

• Times of «one therapy fits all» are
  finished
• Maximizing efficacy of treatments means
  understanding the target
Tailored Treatments for
          Individual Patients…

• Understanding the target – should have
  been particularly easy in breast cancer

  • Steroid hormone receptors – the degree
    of endocrine responsiveness
  • HER2 positivity – response to trastuzumab
    (+/- chemotherapy)
Breast Cancer
Thresholds for Treatment Modalities
Treatment Modality               Indication                         Comments

Endocrine therapy*               Any ER staining                    ER-ve PgR+ve probably
                                                                    artefactual

Anti HER2 therapy*               ASCO/CAP HER2+ve (30%              May use clinical trial
                                 strong staining or Fish            definitions
                                 2.2+)

Chemotherapy
A. With anti HER2                Trial evidence limited to use      Logical but unproven
                                 with or following                  without chemotherapy in
                                 chemotherapy                       strongly ER+ve HER2+ve
B. Triple negative               Most patients                      No proven alternative. Most
                                                                    at sufficient risk
C. With endocrine therapy        Variable according to risk         See next table
in ER+ve HER2–ve


* Patients with pT1a pN0 and ER-ve disease might be spared adjuvant systemic therapy.
  Patients with pT1a pN0 and ER+ve disease should be offered endocrine therapy alone at any case,
  without considering chemotherapy.
Thresholds for Treatment Modalities

Treatment           Indication        Comments
Modality



Endocrine therapy   Any ER staining   ER-ve PgR+ve
                                      probably
                                      artefactual
Thresholds for Treatment Modalities

Treatment           Indication           Comments
Modality


Anti HER2 therapy   ASCO/CAP             May use clinical
                    HER2+ve (30%         trial definitions
                    strong staining or
                    Fish 2.2+)
Thresholds for Treatment Modalities
Treatment Modality    Indication                  Comments


Chemotherapy

A. With anti HER2     Trial evidence limited to   Logical but unproven
                      use with or following       without chemotherapy in
                      chemotherapy                strongly ER+ve
                                                  HER2+ve



B. Triple negative    Most patients               No proven alternative.
                                                  Most at sufficient risk


C. With endocrine     Variable according to       See next table
   therapy in ER+ve   risk
   HER2–ve
Chemotherapy in ER+ve HER2-ve
Relative Indications for          Factors not useful in decision*   Relative Indications for endocrine
chemotherapy: any of                                                therapy alone


Grade 3                           Grade 2                           Grade 1

High proliferation**              Intermediate proliferation        Low proliferation



Lower ER and PgR                                                    Higher ER and PgR
level                                                               level
N 4+                              N 1-3                             Node negative

Peritumoral vascular invasion                                       No PVI
(PVI)


T size > 5cm                      T size 2 – 5 cm                   T size <= 2cm***

Patient preference to use all                                       Patient preference to avoid side
available treatments                                                effects




       *    If most are present, could constitute a relative indication for chemotherapy
                      ** As assessed by conventional or genetic assays
               *** Patients with pT1a pN0 and ER+ve disease should be offered
              endocrine therapy alone at any case, without considering chemotherapy
Treatment Modalities 2009
                 Endocrine              Endocrine
                 Responsive           Non-Responsive
                 (ER ≥ 1%)              (ER = 0%)


HER2- neg.            ET                   CT
             ( CT    using criteria
             listed on next slide)



HER2-pos.    ET + Trastuzumab          Trastuzumab
                    + CT
                                          + CT
Treatment Selection Flowchart 2009

           Estrogen Receptor ≥ 1% stained cells


                 Yes               No


  HER2-status (CAP/ASCO)         HER2-status (CAP/ASCO)


    Positive   Negative              Positive     Negative


     ET              ET          Trastuzumab           CT
     +          ( CT using           + CT
Trastuzumab    criteria listed
    + CT       as threshold)
Central Pathology Review at IEO
(ALTTO Trial of anti-HER2 Therapy – 30nov08)


   ER          CENTRAL REVIEW (IEO)

                         Positive
  LOCAL      Positive
                        ≥1% and     Negative   tot
   LAB        ≥10%
                          <10%

                                      113
  Positive    2481         54                  2648
                                    (4.3%)

              388         107
  Negative                           1788      2283
             (16.9%)    (4.7%)
BIG 1-98 Postm., HR-pos
False Positive Receptor Status




        94/3610 (2.6%) false positive
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010




            Early Breast Cancer Trialists’
                Collaborative Group

                             Eighth Main Meeting
                                    Oxford
                                        September 2010
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010


     ER level
     matters


 EBCTCG 2010
 (unpublished)




Clear ―dose-response‖
effect for ER level
(ligand binding assays)
on TAM efficacy
Adjuvant Therapy for Premenopausal
Women with Endocrine-Responsive Disease
 • Standard: Tamoxifen
 • Standard: Ovarian Function Suppression
   Plus Tamoxifen
 • Role of Aromatase Inhibitors not yet
   established
 • Ovarian Function Suppression alone only
   in extraordinary circumstances
 • Do all premenopausal women with
   hormone-responsive breast cancer require
   chemotherapy? NOT LIKELY
IBCSG Trial 11-93
Prem. with N+, ER+ Disease
             1993-1998
    174 patients; 97% had 1-3 N+
R
A
N     OFS→AC/EC x 4→Tam to 5 yrs
D
O
M
      OFS→Tam to 5 yrs
I
Z
E

            OFS: ovarian function suppression by
            GnRH analog, oophorectomy, or ovarian RT
IBCSG 11-93
                   n=174 (1993-1998)
Premenopausal, node-positive disease (97% had 1-3 N+)




     10-year med fu; Thürlimann et al, BCRT 2009;113,137-144
Aol analysis conducted on trial 11
 IBCSG Trial 11-93 and Adjuvant! Online
      RFS for AOL control (OFS+Tam)
         may be underestimated

                           76% 10-yr RFS




                           64% 10-yr RFS


                          P=0.03
IBCSG Trial 15-95 Design
  n = 344 (1995-2000)
R
A   Standard Dose Chemotherapy (SD-CT)
N
D   AC/EC x 4 → CMF x 3
O
M
    Dose Intensive Chemotherapy (DI-EC)
I
Z   High Dose EC x 3
E
IBCSG Trial 15-95
SD-CT = ACx4 -> CMFx3 + tamoxifen
DI-EC = E(200 mg/m2)+C(4 gm/m2)x3
      + PBPC support + tamoxifen

                    56% ER-neg (≥ 5 N+)
                    43% ER-pos (≥10 N+)

                    67% premenopausal
IBCSG Trial 15-95
ER-positive cohort (n=149)     ER-negative cohort (n=193)




 Interaction p-value = 0.21  DI-EC useful for all
Trial 13-93
Chemotherapy-Induced Amenorrhea

  ER Positive     ER Positive Tamoxifen
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010




                Longer therapy,
          iatrogenic amenorrhea, and
         survival in early breast cancer
                                        (NSABP B-30)


                   Swain SM, Jeong JH, Geyer CE Jr et al


                         N Engl J Med. 2010 ;362:2053-65




                 This presentation is the intellectual property of the author/presenter.
                       Contact them for permission to reprint and/or distribute.
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                        December 8-12, 2010
                Overall Survival and Disease-free Survival




  «Amenorrhea was associated with improved survival regardless
  of the treatment and estrogen-receptor status.»


Swain SM et al. N Engl J Med 2010;362:2053-2065
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010


Taxane-Based Chemotherapy for Node-Positive Breast Cancer
                 — Take-Home Lessons


    «An unexpected finding in this study was
    that chemotherapy-induced menopause
    appeared to be associated with increased
    survival among both ER-positive and ER-
    negative subgroups. Ovarian suppression
    has value in the treatment of breast cancer,
    but the effect was logically thought to be
    restricted to ER-positive disease.»


Ellis, M. NEJM 2010; 362:2122-2124
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010


         Amenorrhea & ER: NSABP & IBCSG


NSABP B-30




IBCSG 13-93

              This presentation is the intellectual property of the author/presenter.
                    Contact them for permission to reprint and/or distribute.
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010
                    Amenorrhea analysis methodology




NSABP
B-30
                                         Anderson JR, Cain KC, Gelber RD:
                                         Analysis of survival by tumor response. J
                                         Clin Oncol 1:710-719, 1983




IBCSG
13-93
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010



        NSABP B-30 Landmark analysis

   «By contrast, women with                         HR for amenorrhea (DFS)
   ER-negative tumors had a
   similar outcome                                    Study         ER pos          ER neg
   regardless of whether
                                                     NSABP
   they had amenorrhea, with
                                                     NEJM
   a hazard ratio for death of                                       0.62*          0.71*
                                                      2010
   1.08 (P = 0.76) and a hazard                      (Jun)
   ratio for disease recurrence, a                   IBCSG
   second malignant condition,                         JCO
                                                                     0.61            1.58
   or death of 0.96 (P = 0.85).»                      2006        p = 0.004          n.s.

                                                     NSABP
                                                     NEJM            0.51            0.96
                                                      2010        p < 0.001          n.s.
                                                     (Dec)
Swain SM et al.
N Engl J Med 2010;363:2268-2270 (Dec 2)
Adjuvant Therapy for Postmenopausal Women
     with Endocrine-Responsive Disease

• Standard: should include Aromatase
    Inhibitors (AIs) with some exceptions
•   Standard: start with AIs if high-risk
•   Switch to tamoxifen is safe and effective
•   Check ovarian function if young
    postmenopausal women with AIs
•   Use AIs for 2-5 years
•   Beyond 5 years proceed with caution
Trials III+IV
         (1978-1981)
Postmenopausal, node-positive disease

n=463                          n=320




         All treatments for 1 year
Trial III DFS
ER+                   ER-
Trials III+IV
         (1978-1981)
Postmenopausal, node-positive disease

n=463                          n=320




         All treatments for 1 year
IBCSG Trial IV
BIG 1-98 Sequential Therapy
          2-Arm Option

 A       Tamoxifen
 B        Letrozole

         4-Arm Option
 A       Tamoxifen         N=1548*

 B        Letrozole        N=1546       N=6,182
                                        Enrolled
 C Tamoxifen   Letrozole   N=1548
                                       1999-2003
 D Letrozole   Tamoxifen   N=1540


                               *612 patients (40%) received
     0     2               5
                                letrozole after the tamoxifen
          YEARS                      arm was unblinded.
Breast Cancer Events
                     TamLet vs. Let

          Overall                 By Nodal Status*




*42% of the population is node positive; 58% node negative
Breast Cancer Events
                   LetTam vs. Let
           Overall                 By Nodal Status*




*42% of the population is node positive; 58% node negative
BIG 1-98 Overall Design
                      R
                      A
                                       2-Arm Option
                      N
                      D   A                   Tamoxifen         N=911     N=1,828
                      O
                      M   B                   Letrozole         N=917     Enrolled
S     Stratify        I                                                  1998-2000
                      Z
U
R
     Institution     E

G    CT (Adjuvant/
                                       4-Arm Option
E                                                                                    N=8,010*
      Neoadjuvant)    R   A                   Tamoxifen         N=1548
R                     A
Y     -Prior          N
      -None           D   B                   Letrozole         N=1546    N=6,182    *ITT: excludes
      -Concurrent     O
                      M   C       Tamoxifen         Letrozole   N=1548    Enrolled   18 patients who
                                                                                     withdrew
                      I                                                  1999-2003   consent and did
                      Z
                      E
                          D       Letrozole         Tamoxifen   N=1540               not receive
                                                                                     study treatment

                              0            2                    5
                                          YEARS
Contributions to Composite Risk
Points:       0     ~0.25     ~0.5   ~0.75   ~1.5
Lymph nodes    0              1-3     4-9    10+
ER %          50+   30-49     <30%
PgR %         20+    <20
Ki-67 %       <14   14-33     34+
HER2          Neg    Pos
PVI           No     Yes
Grade          1      2        3
T size        ≤2    2.1-4.9    5+
STEPP 5-year DFS by Composite Risk


    Node neg    Node 3+
     T 1.5cm    T 1.9cm
     Her2 neg               Node neg
                Her2 neg
     PVI neg                T 2.1cm
                PVI neg                 Node 12+
     ER 90%                 Her2 pos
                ER 95%                  T 2.5cm
    PgR 80%                  PVI neg
                PgR 75%                 Her2 neg
     Ki-67 7%               ER 75%
                Ki-67 11%                PVI pos
                            PgR 0%
                                        ER 80%
                            Ki-67 35%
                                        PgR 75%
                                        Ki-67 20%


          Increasing Composite Risk
STEPP 5-year DFS by Composite Risk




       Increasing Composite Risk
STEPP 5-year DFS by Composite Risk




       Low Risk       Intermediate Risk         High Risk
     All treatments    All letrozole arms      Letrozole 5yr
     including TAM    appear similar: TAM   appears better than
     appear similar           inferior       either sequence




          Increasing Composite Risk
DFS by Increasing Composite Risk:
              High
DFS by Increasing Composite Risk:
          Intermediate
DFS by Increasing Composite Risk:
              Low
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010


         ACOSOG Z1031: A randomized
       neoadjuvant comparison between
    letrozole (LET), anastrozole (ANA) and
    exemestane (EXE) for Postmenopausal
    Women with ER Rich Stage 2/3 Breast
     Cancer: Biomarker outcomes and the
    predictive value of the baseline PAM50
            based intrinsic subtype

            Ellis M. et al. SABCS 2010 / abst. 794


              This presentation is the intellectual property of the author/presenter.
                    Contact them for permission to reprint and/or distribute.
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                        December 8-12, 2010



                            Study Design




                                                http://clinicaltrials.gov/ct/show/NCT00265759

Ellis M. et al. SABCS 2010 / abst. 794
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010


   Clinical response                       (%)                    Ki67       (%)




ACOSOG Z1031                                               Kruskal Wallis A v E v L P= 0.4550
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                        December 8-12, 2010

                Adjuvant versus neoadjuvant
                     endocrine therapy

Adjuvant Trial             Result based on          Neoadjuvant              Result for Ki67
                           events                   Ki67 study               based changes

BIG 1-98 2005              L>T                      P024 2003                L>T
Thürlimann et al           N=8010                   Ellis et al              N=185

ATAC 2002                  A>T=C                    IMPACT 2005              A>T=C
Baum et al                 N=9366                   Dowsett et al            N=147

MA27 2010                  A=E                      Z1031 2010               A=E
Goss et al                 N=approx 9000            Ellis et al              N=165

FACE Trial                 A v L?                   Z1031 2010               A=L
                           N=approx 4000            Ellis et al              N=161


Ellis M. et al. SABCS 2010 / abst. 794
Adjuvant Chemotherapy
• No standard regimen
• No predictive test for use of individual
  components
• Choose efficient treatment among many
  standards, when indicated
• ER, HER2, proliferation may predict
  response to ANY chemotherapy, rather
  than being agent-specific
• Multigene arrays may be useful
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010




     Adjuvant Docetaxel for High-Risk,
       Node-Negative Breast Cancer


    Martin M. et al. N Engl J Med 2010; 363:2200-
                                            2210




              This presentation is the intellectual property of the author/presenter.
                    Contact them for permission to reprint and/or distribute.
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                        December 8-12, 2010




                           GEICAM (Node - ve)




Martin M. et al. N Engl J Med 2010; 363:2200-2210
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010




       Early Breast Cancer Trialists’
            Collaborative Group

                             Eighth Main Meeting
                                    Oxford
                                        September 2010
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010




       Anthracycline benefit is early
    Recurrence as first event in trials of anthracycline-containing
             regimens versus standard CMF regimens




EBCTCG 2010
(unpublished)
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010



            Taxane benefit is durable
       Recurrence as first event in the trials of a taxane-plus-
    anthracycline-based regimen vs a non-taxane control regimen
        with the SAME, or HIGHER, total dose of anthracycline




EBCTCG 2010
(unpublished)
Genomic Profiles Determine Which
Patients Receive Adjuvant Chemotherapy?

• «The Panel accepts molecularly-based tools
  (such as the 21-gene recurrence score assay)
  or gene expression profiling (such as by the 70-
  gene assay) as an adjunct to high-quality
  standard histopathologic assessment to refine
  risk categories.
• The Panel recognizes in many cases this may
  provide more optimal individual risk allocation
  for making a decision to add chemotherapy or
  not.»
Trastuzumab
• Adjuvant Trastuzumab x 1 year with CT is
  standard of care for women with high risk
  HER2+ve breast cancer
• Standardised HER2 testing: accredited
  lab. for all invasive breast cancers
• Concurrent v. sequential trastuzumab and
  anthracycline v. other chemotherapy
  remain uncertain
Trastuzumab:
        Open Questions

• Trastuzumab for small (<1cm)
  HER2+ve cancers
• Trastuzumab alone v. plus CT in
  lower risk
• Duration = high priority
• Other anti-HER2 agents
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010



   First results of the NeoALTTO trial (BIG
      01-06 / EGF 106903): A phase III,
    randomized, open label, neoadjuvant
  study of lapatinib, trastuzumab, and their
    combination plus paclitaxel in women
  with HER2-positive primary breast cancer

          Baselga J. et al. SABCS 2010 / abst. 291




              This presentation is the intellectual property of the author/presenter.
                    Contact them for permission to reprint and/or distribute.
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                       December 8-12, 2010




                                           lapatinib                                 lapatinib
Invasive breast cancer
HER2+                       R                 paclitaxel
T >2 cm                     A                                  S
(inflammatory excluded)
LVEF  50%                  N                                  u
                            D                                  r     FEC
N=450
                            O            trastuzumab           g                 trastuzumab
                            M                 paclitaxel
                                                               e      3
Stratification:
—T<5 cm vs. T>5 cm          I                                  r
— ER or PgR+ vs. both –
— N 0-1 vs. N ≥2
                            Z
— Conservative surgery
                                           lapatinib           y
                            E                                                       lapatinib
                                         trastuzumab                              trastuzumab
                                               paclitaxel


                                         6 + 12 weeks              9 weeks        34 weeks

                                                  52 weeks of anti-ErbB2 therapy

                                                       Baselga J. et al. SABCS 2010 / abst. 291
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                        December 8-12, 2010

                                   NeoALTTO




Baselga J. et al. SABCS 2010 / abst. 291
San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center
                                        December 8-12, 2010

                                NeoSPHERE




Gianni L. et al. SABCS 2010 / abst. 1000
Current & Future Trials

• Chemotherapy: still looking at the risk of relapse
• Endocrine therapies: looking at the sequence
• Targeted biological therapies: looking at the
  best use (combination or sequence)
• Targeting angiogenesis and stroma
Oncotype DX 21 Gene
           Recurrence Score (RS) Assay
   16 Cancer and 5 Reference Genes From 3 Studies
PROLIFERATION     ESTROGEN      RS = + 0.47 x HER2 Group Score
     Ki-67            ER             - 0.34 x ER Group Score
    STK15             PR             + 1.04 x Proliferation Group Score
                                     + 0.10 x Invasion Group Score
   Survivin          Bcl2
                                     + 0.05 x CD68
   Cyclin B1       SCUBE2            - 0.08 x GSTM1
    MYBL2                            - 0.07 x BAG1
                 GSTM1   BAG1
  INVASION
 Stromolysin 3      CD68          Category           RS (0 – 100)
 Cathepsin L2                   Low risk         RS < 18

                  REFERENCE     Int risk         RS ≥ 18 and < 31
                  Beta-actin
    HER2            GAPDH       High risk        RS ≥ 31
    GRB7            RPLPO
    HER2             GUS
                     TFRC
Expression Data Matrix of 70 Prognostic Markers Genes from Tumors
of 78 Breast Cancer Patients Hybridized Using the Custom Microarray




                                                           Laura J. Van’t Veer
Current & Future Trials
• Chemotherapy: still looking at the risk of relapse
• Endocrine therapies: looking at the sequence
• Targeted biological therapies: looking at the
  best use (combination or sequence)
• Targeting angiogenesis and stroma
S LE
Study Of Letrozole Extension

  IBCSG 35-07 / BIG 1-07


Coordinating Group: IBCSG
S LE
After 4 to 6 Years of Prior Adjuvant Endocrine Therapy
     Postmenopausal, HR-Positive, Node-Positive

               R           Continuous letrozole x 5 yrs
               A
Stratify
               N
Institution
Prior ET:      D
 SERM          O           Intermittent letrozole over 5 yrs
 AI            M
 Both          I           9 mos.    9 mos. 9 mos. 9 mos. 12 mos.
               Z
               E


                           0   6    12 18 24 30 36 42              48 54 60
              Extended Adjuvant Endocrine Therapy
              A: Continuous letrozole 2.5 mg daily for 5 years
              B: Intermittent letrozole 2.5 mg daily for the first 9
                 months of years 1 through 4, followed by 12 months
                 in year 5
Effect of Intermittent Letrozole Treatment in
                                                         MCF-7Ca Xenografts
                          2500              Control
                                                                              Off Letrozole
Mean Tumor Volume (mm3)




                          2250
                                                                                                                                         Her-2
                          2000                                                                 1      5.4    6.7    1.99   0.3     1.1
                          1750                                                     Letrozole                                             p-Her-2
                          1500                                                                 1      3.1    3.7    2.1    1.3     1.7
                                                                                                                                         p-MAPK
                          1250
                                                                                               1      4.1    5.9    0.9    0.8     1.1
                          1000
                                                                               Back on                                                   MAPK
                           750                                                Letrozole        1       1      1     0.9    0.9      1
                           500                                                                                                           Aromatase
                                                                                               1      0.2     0     0.9    2.7     0.8
                           250
                                                                                                                                         ERα
                             0                                                                 1      0.2    0.1    0.9    2.4     1.1
                                 02 4   6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36
                                                                                                                                         ß-Actin
                                                         Weeks




                                 Sabnis G.J. et al. Stopping treatment can reverse acquired resistance to letrozole. Cancer Res 68: 4518-4524, 2008
Current & Future Trials

• Chemotherapy: still looking at the risk of relapse
• Endocrine therapies: looking at the sequence
• Targeted biological therapies: looking at the
  best use (combination or sequence)
• Targeting angiogenesis and stroma
HER2 Targeted Trial: ALTTO

R
A                  Trastuzumab
N
D                   Lapatinib
O
M          T            Lapatinib
I
Z              Trastuzumab+Lapatinib
E

       0             6 mos             1 year

       Target accrual: 8000 patients
Current & Future Trials

• Chemotherapy: still looking at the risk of relapse
• Endocrine therapies: looking at the sequence
• Targeted biological therapies: looking at the
  best use (combination or sequence)
• Targeting angiogenesis and stroma
Metronomic Therapy (CM) Following Standard Adjuvant
             Chemotherapy for Patients With
       ER-Negative and PgR-Negative Breast Cancer
                   IBCSG 22-00
             Strata        R
                           A
             Menopausal
                           N
ER <10%      Status        D
                                   CT
   &                       O
             Type of CT    M
PgR <10%
             Institution
                           I
                           Z
                                   CT    CM x 12 mos
                           E



Target           900 pts
Accrual (6/2008) 718 pts
DF/PCC Breast Cancer SPORE
Randomized Phase II Trial of Metronomic
    Chemotherapy ± Bevacizumab


 CM + bevacizumab       CM alone



  10 (41%) PR         2 (10%) PR




                              Burstein H., SABCS, 2005
BEX Regimen in Advanced BC
  Bevacizumab
       10 mg/kg iv every 2 weeks
  Cyclophosphamide
       50 mg/day orally @ 9 a.m.
  Capecitabine
       500 mg x 3/day orally after meals




              Dellapasqua S. et al, J Clin Oncol. 26: 4899-4905, 2008
BEX Results
Best response                                        n             %
Assessable patients                                 46
 CR                                                  1              3
 PR                                                  18            45
 SD24 weeks                                         8             20
 SD<24 weeks                                         8             20
 PD                                                  5             13
Overall response (CR+PR)                             19          48%
 95% CI                                                          32 to 64
Clinical benefit (CR+PR+SD24 weeks)                 27          68%
 95% CI                                                          51 to 81




                       Dellapasqua S. et al, J Clin Oncol. 26: 4899-4905, 2008
Selected Triple
                     negative




TAILORED              HER2+

CLINICAL TRIALS

                     Endocrine
                   incompletely
                    responsive



                     Endocrine
                    responsive
Thanks to
patients,
investigators,
nurses,
data managers, sponsors, and
all who are committed to clinical
trials
for progress in
care & knowledge

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MCO 2011 - Slide 7 - A. Goldhirsch - Early systemic treatment

  • 1. Early Systemic Treatment Aron Goldhirsch, MD Department of Medicine European Institute of Oncology (EIO) Oncology Institute of Southern Switzerland (IOSI) International Breast Cancer Study Group (IBCSG)
  • 2. Adjuvant Therapies for Women with Breast Cancer: Present and Future Adjuvant Therapies are the most important field of medical oncology …because - they lead to CURE saving more lives…
  • 3. Adjuvant Treatments ... Why are they special? • Patient is free of overt disease • Assumption is that:  residual microscopic disease  same characteristics as primary  similar responsiveness • In case of doubt:  worse scenario  most convenient for the patient • Impossible to check efficacy
  • 4. Preoperative (Neo-Adjuvant) Treatments • Treating more efficiently patients with locally advanced disease • Information on efficacy & safety of new therapies during the short preoperative exposure • I will not deal with these therapies due to time constraints
  • 5. Adjuvant Treatments • Historically, the first adjuvant treatments were ovarian function suppression (OFS) and chemotherapies (CTs) • The overwhelming effects of CTs and the lack of clear advantage for OFS signed the misperception about what should be done • Lacking knowledge about the target was the main problem
  • 6. Relapse-Free Survival (A) and Overall Survival (B) According to Treatment Group Bonadonna G. et al, N Engl J Med 332: 901-906, 1995
  • 7. RFS and OS According to Treatment Group N- All 90 pts had endocrine non responsive disease! Zambetti M. et al, Ann Oncol 7: 481-485, 1996
  • 8. CALGB/CTSU – 49907 RFS by ER status Receptor Negative Tumors Receptor-Neg ative Tumors Receptor Positive Tumors Receptor-Positive Tumors Relapse-Free Survival Relapse-Free Survival By Arm Relapse-Free Survival Relapse-Free Survival By Arm 0.8 0.8 Proportion Relapse-Free Proportion Relapse-Free 0.6 0.6 0.4 0.4 0.2 0.2 0.0 0.0 0 1 2 3 4 5 0 1 2 3 4 5 Years From Study Entry Years From Study Entry CMF/AC N= 106 Events= 14 CMF/AC N= 218 Events= 21 Capecitabine N= 97 Events= 34 Capecitabine N= 209 Events= 26 No Endocrine Therapy Endocrine Therapy
  • 9. …understanding the Need for Tailored Treatments for Individual Patients • Times of «one therapy fits all» are finished • Maximizing efficacy of treatments means understanding the target
  • 10. Tailored Treatments for Individual Patients… • Understanding the target – should have been particularly easy in breast cancer • Steroid hormone receptors – the degree of endocrine responsiveness • HER2 positivity – response to trastuzumab (+/- chemotherapy)
  • 11.
  • 13. Thresholds for Treatment Modalities Treatment Modality Indication Comments Endocrine therapy* Any ER staining ER-ve PgR+ve probably artefactual Anti HER2 therapy* ASCO/CAP HER2+ve (30% May use clinical trial strong staining or Fish definitions 2.2+) Chemotherapy A. With anti HER2 Trial evidence limited to use Logical but unproven with or following without chemotherapy in chemotherapy strongly ER+ve HER2+ve B. Triple negative Most patients No proven alternative. Most at sufficient risk C. With endocrine therapy Variable according to risk See next table in ER+ve HER2–ve * Patients with pT1a pN0 and ER-ve disease might be spared adjuvant systemic therapy. Patients with pT1a pN0 and ER+ve disease should be offered endocrine therapy alone at any case, without considering chemotherapy.
  • 14. Thresholds for Treatment Modalities Treatment Indication Comments Modality Endocrine therapy Any ER staining ER-ve PgR+ve probably artefactual
  • 15. Thresholds for Treatment Modalities Treatment Indication Comments Modality Anti HER2 therapy ASCO/CAP May use clinical HER2+ve (30% trial definitions strong staining or Fish 2.2+)
  • 16. Thresholds for Treatment Modalities Treatment Modality Indication Comments Chemotherapy A. With anti HER2 Trial evidence limited to Logical but unproven use with or following without chemotherapy in chemotherapy strongly ER+ve HER2+ve B. Triple negative Most patients No proven alternative. Most at sufficient risk C. With endocrine Variable according to See next table therapy in ER+ve risk HER2–ve
  • 17. Chemotherapy in ER+ve HER2-ve Relative Indications for Factors not useful in decision* Relative Indications for endocrine chemotherapy: any of therapy alone Grade 3 Grade 2 Grade 1 High proliferation** Intermediate proliferation Low proliferation Lower ER and PgR Higher ER and PgR level level N 4+ N 1-3 Node negative Peritumoral vascular invasion No PVI (PVI) T size > 5cm T size 2 – 5 cm T size <= 2cm*** Patient preference to use all Patient preference to avoid side available treatments effects * If most are present, could constitute a relative indication for chemotherapy ** As assessed by conventional or genetic assays *** Patients with pT1a pN0 and ER+ve disease should be offered endocrine therapy alone at any case, without considering chemotherapy
  • 18. Treatment Modalities 2009 Endocrine Endocrine Responsive Non-Responsive (ER ≥ 1%) (ER = 0%) HER2- neg. ET CT ( CT using criteria listed on next slide) HER2-pos. ET + Trastuzumab Trastuzumab + CT + CT
  • 19. Treatment Selection Flowchart 2009 Estrogen Receptor ≥ 1% stained cells Yes No HER2-status (CAP/ASCO) HER2-status (CAP/ASCO) Positive Negative Positive Negative ET ET Trastuzumab CT + ( CT using + CT Trastuzumab criteria listed + CT as threshold)
  • 20. Central Pathology Review at IEO (ALTTO Trial of anti-HER2 Therapy – 30nov08) ER CENTRAL REVIEW (IEO) Positive LOCAL Positive ≥1% and Negative tot LAB ≥10% <10% 113 Positive 2481 54 2648 (4.3%) 388 107 Negative 1788 2283 (16.9%) (4.7%)
  • 21. BIG 1-98 Postm., HR-pos False Positive Receptor Status 94/3610 (2.6%) false positive
  • 22. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Early Breast Cancer Trialists’ Collaborative Group Eighth Main Meeting Oxford September 2010
  • 23. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 ER level matters EBCTCG 2010 (unpublished) Clear ―dose-response‖ effect for ER level (ligand binding assays) on TAM efficacy
  • 24. Adjuvant Therapy for Premenopausal Women with Endocrine-Responsive Disease • Standard: Tamoxifen • Standard: Ovarian Function Suppression Plus Tamoxifen • Role of Aromatase Inhibitors not yet established • Ovarian Function Suppression alone only in extraordinary circumstances • Do all premenopausal women with hormone-responsive breast cancer require chemotherapy? NOT LIKELY
  • 25. IBCSG Trial 11-93 Prem. with N+, ER+ Disease 1993-1998 174 patients; 97% had 1-3 N+ R A N OFS→AC/EC x 4→Tam to 5 yrs D O M OFS→Tam to 5 yrs I Z E OFS: ovarian function suppression by GnRH analog, oophorectomy, or ovarian RT
  • 26. IBCSG 11-93 n=174 (1993-1998) Premenopausal, node-positive disease (97% had 1-3 N+) 10-year med fu; Thürlimann et al, BCRT 2009;113,137-144
  • 27. Aol analysis conducted on trial 11 IBCSG Trial 11-93 and Adjuvant! Online RFS for AOL control (OFS+Tam) may be underestimated 76% 10-yr RFS 64% 10-yr RFS P=0.03
  • 28. IBCSG Trial 15-95 Design n = 344 (1995-2000) R A Standard Dose Chemotherapy (SD-CT) N D AC/EC x 4 → CMF x 3 O M Dose Intensive Chemotherapy (DI-EC) I Z High Dose EC x 3 E
  • 29. IBCSG Trial 15-95 SD-CT = ACx4 -> CMFx3 + tamoxifen DI-EC = E(200 mg/m2)+C(4 gm/m2)x3 + PBPC support + tamoxifen 56% ER-neg (≥ 5 N+) 43% ER-pos (≥10 N+) 67% premenopausal
  • 30. IBCSG Trial 15-95 ER-positive cohort (n=149) ER-negative cohort (n=193) Interaction p-value = 0.21  DI-EC useful for all
  • 31. Trial 13-93 Chemotherapy-Induced Amenorrhea ER Positive ER Positive Tamoxifen
  • 32. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Longer therapy, iatrogenic amenorrhea, and survival in early breast cancer (NSABP B-30) Swain SM, Jeong JH, Geyer CE Jr et al N Engl J Med. 2010 ;362:2053-65 This presentation is the intellectual property of the author/presenter. Contact them for permission to reprint and/or distribute.
  • 33. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Overall Survival and Disease-free Survival «Amenorrhea was associated with improved survival regardless of the treatment and estrogen-receptor status.» Swain SM et al. N Engl J Med 2010;362:2053-2065
  • 34. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Taxane-Based Chemotherapy for Node-Positive Breast Cancer — Take-Home Lessons «An unexpected finding in this study was that chemotherapy-induced menopause appeared to be associated with increased survival among both ER-positive and ER- negative subgroups. Ovarian suppression has value in the treatment of breast cancer, but the effect was logically thought to be restricted to ER-positive disease.» Ellis, M. NEJM 2010; 362:2122-2124
  • 35. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Amenorrhea & ER: NSABP & IBCSG NSABP B-30 IBCSG 13-93 This presentation is the intellectual property of the author/presenter. Contact them for permission to reprint and/or distribute.
  • 36. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Amenorrhea analysis methodology NSABP B-30 Anderson JR, Cain KC, Gelber RD: Analysis of survival by tumor response. J Clin Oncol 1:710-719, 1983 IBCSG 13-93
  • 37. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 NSABP B-30 Landmark analysis «By contrast, women with HR for amenorrhea (DFS) ER-negative tumors had a similar outcome Study ER pos ER neg regardless of whether NSABP they had amenorrhea, with NEJM a hazard ratio for death of 0.62* 0.71* 2010 1.08 (P = 0.76) and a hazard (Jun) ratio for disease recurrence, a IBCSG second malignant condition, JCO 0.61 1.58 or death of 0.96 (P = 0.85).» 2006 p = 0.004 n.s. NSABP NEJM 0.51 0.96 2010 p < 0.001 n.s. (Dec) Swain SM et al. N Engl J Med 2010;363:2268-2270 (Dec 2)
  • 38. Adjuvant Therapy for Postmenopausal Women with Endocrine-Responsive Disease • Standard: should include Aromatase Inhibitors (AIs) with some exceptions • Standard: start with AIs if high-risk • Switch to tamoxifen is safe and effective • Check ovarian function if young postmenopausal women with AIs • Use AIs for 2-5 years • Beyond 5 years proceed with caution
  • 39. Trials III+IV (1978-1981) Postmenopausal, node-positive disease n=463 n=320 All treatments for 1 year
  • 41. Trials III+IV (1978-1981) Postmenopausal, node-positive disease n=463 n=320 All treatments for 1 year
  • 43. BIG 1-98 Sequential Therapy 2-Arm Option A Tamoxifen B Letrozole 4-Arm Option A Tamoxifen N=1548* B Letrozole N=1546 N=6,182 Enrolled C Tamoxifen Letrozole N=1548 1999-2003 D Letrozole Tamoxifen N=1540 *612 patients (40%) received 0 2 5 letrozole after the tamoxifen YEARS arm was unblinded.
  • 44. Breast Cancer Events TamLet vs. Let Overall By Nodal Status* *42% of the population is node positive; 58% node negative
  • 45. Breast Cancer Events LetTam vs. Let Overall By Nodal Status* *42% of the population is node positive; 58% node negative
  • 46. BIG 1-98 Overall Design R A 2-Arm Option N D A Tamoxifen N=911 N=1,828 O M B Letrozole N=917 Enrolled S Stratify I 1998-2000 Z U R  Institution E G  CT (Adjuvant/ 4-Arm Option E N=8,010* Neoadjuvant) R A Tamoxifen N=1548 R A Y -Prior N -None D B Letrozole N=1546 N=6,182 *ITT: excludes -Concurrent O M C Tamoxifen Letrozole N=1548 Enrolled 18 patients who withdrew I 1999-2003 consent and did Z E D Letrozole Tamoxifen N=1540 not receive study treatment 0 2 5 YEARS
  • 47. Contributions to Composite Risk Points: 0 ~0.25 ~0.5 ~0.75 ~1.5 Lymph nodes 0 1-3 4-9 10+ ER % 50+ 30-49 <30% PgR % 20+ <20 Ki-67 % <14 14-33 34+ HER2 Neg Pos PVI No Yes Grade 1 2 3 T size ≤2 2.1-4.9 5+
  • 48. STEPP 5-year DFS by Composite Risk Node neg Node 3+ T 1.5cm T 1.9cm Her2 neg Node neg Her2 neg PVI neg T 2.1cm PVI neg Node 12+ ER 90% Her2 pos ER 95% T 2.5cm PgR 80% PVI neg PgR 75% Her2 neg Ki-67 7% ER 75% Ki-67 11% PVI pos PgR 0% ER 80% Ki-67 35% PgR 75% Ki-67 20% Increasing Composite Risk
  • 49. STEPP 5-year DFS by Composite Risk Increasing Composite Risk
  • 50. STEPP 5-year DFS by Composite Risk Low Risk Intermediate Risk High Risk All treatments All letrozole arms Letrozole 5yr including TAM appear similar: TAM appears better than appear similar inferior either sequence Increasing Composite Risk
  • 51. DFS by Increasing Composite Risk: High
  • 52. DFS by Increasing Composite Risk: Intermediate
  • 53. DFS by Increasing Composite Risk: Low
  • 54. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 ACOSOG Z1031: A randomized neoadjuvant comparison between letrozole (LET), anastrozole (ANA) and exemestane (EXE) for Postmenopausal Women with ER Rich Stage 2/3 Breast Cancer: Biomarker outcomes and the predictive value of the baseline PAM50 based intrinsic subtype Ellis M. et al. SABCS 2010 / abst. 794 This presentation is the intellectual property of the author/presenter. Contact them for permission to reprint and/or distribute.
  • 55. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Study Design http://clinicaltrials.gov/ct/show/NCT00265759 Ellis M. et al. SABCS 2010 / abst. 794
  • 56. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Clinical response (%) Ki67 (%) ACOSOG Z1031 Kruskal Wallis A v E v L P= 0.4550
  • 57. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Adjuvant versus neoadjuvant endocrine therapy Adjuvant Trial Result based on Neoadjuvant Result for Ki67 events Ki67 study based changes BIG 1-98 2005 L>T P024 2003 L>T Thürlimann et al N=8010 Ellis et al N=185 ATAC 2002 A>T=C IMPACT 2005 A>T=C Baum et al N=9366 Dowsett et al N=147 MA27 2010 A=E Z1031 2010 A=E Goss et al N=approx 9000 Ellis et al N=165 FACE Trial A v L? Z1031 2010 A=L N=approx 4000 Ellis et al N=161 Ellis M. et al. SABCS 2010 / abst. 794
  • 58. Adjuvant Chemotherapy • No standard regimen • No predictive test for use of individual components • Choose efficient treatment among many standards, when indicated • ER, HER2, proliferation may predict response to ANY chemotherapy, rather than being agent-specific • Multigene arrays may be useful
  • 59.
  • 60. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Adjuvant Docetaxel for High-Risk, Node-Negative Breast Cancer Martin M. et al. N Engl J Med 2010; 363:2200- 2210 This presentation is the intellectual property of the author/presenter. Contact them for permission to reprint and/or distribute.
  • 61. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 GEICAM (Node - ve) Martin M. et al. N Engl J Med 2010; 363:2200-2210
  • 62. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Early Breast Cancer Trialists’ Collaborative Group Eighth Main Meeting Oxford September 2010
  • 63. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Anthracycline benefit is early Recurrence as first event in trials of anthracycline-containing regimens versus standard CMF regimens EBCTCG 2010 (unpublished)
  • 64. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 Taxane benefit is durable Recurrence as first event in the trials of a taxane-plus- anthracycline-based regimen vs a non-taxane control regimen with the SAME, or HIGHER, total dose of anthracycline EBCTCG 2010 (unpublished)
  • 65. Genomic Profiles Determine Which Patients Receive Adjuvant Chemotherapy? • «The Panel accepts molecularly-based tools (such as the 21-gene recurrence score assay) or gene expression profiling (such as by the 70- gene assay) as an adjunct to high-quality standard histopathologic assessment to refine risk categories. • The Panel recognizes in many cases this may provide more optimal individual risk allocation for making a decision to add chemotherapy or not.»
  • 66. Trastuzumab • Adjuvant Trastuzumab x 1 year with CT is standard of care for women with high risk HER2+ve breast cancer • Standardised HER2 testing: accredited lab. for all invasive breast cancers • Concurrent v. sequential trastuzumab and anthracycline v. other chemotherapy remain uncertain
  • 67. Trastuzumab: Open Questions • Trastuzumab for small (<1cm) HER2+ve cancers • Trastuzumab alone v. plus CT in lower risk • Duration = high priority • Other anti-HER2 agents
  • 68. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 First results of the NeoALTTO trial (BIG 01-06 / EGF 106903): A phase III, randomized, open label, neoadjuvant study of lapatinib, trastuzumab, and their combination plus paclitaxel in women with HER2-positive primary breast cancer Baselga J. et al. SABCS 2010 / abst. 291 This presentation is the intellectual property of the author/presenter. Contact them for permission to reprint and/or distribute.
  • 69. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 lapatinib lapatinib Invasive breast cancer HER2+ R paclitaxel T >2 cm A S (inflammatory excluded) LVEF  50% N u D r FEC N=450 O trastuzumab g  trastuzumab M paclitaxel e 3 Stratification: —T<5 cm vs. T>5 cm I r — ER or PgR+ vs. both – — N 0-1 vs. N ≥2 Z — Conservative surgery lapatinib y E lapatinib trastuzumab trastuzumab paclitaxel 6 + 12 weeks 9 weeks 34 weeks 52 weeks of anti-ErbB2 therapy Baselga J. et al. SABCS 2010 / abst. 291
  • 70. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 NeoALTTO Baselga J. et al. SABCS 2010 / abst. 291
  • 71. San Antonio Breast Cancer Symposium – Cancer Therapy and Research Center at UT Health Science Center December 8-12, 2010 NeoSPHERE Gianni L. et al. SABCS 2010 / abst. 1000
  • 72. Current & Future Trials • Chemotherapy: still looking at the risk of relapse • Endocrine therapies: looking at the sequence • Targeted biological therapies: looking at the best use (combination or sequence) • Targeting angiogenesis and stroma
  • 73. Oncotype DX 21 Gene Recurrence Score (RS) Assay 16 Cancer and 5 Reference Genes From 3 Studies PROLIFERATION ESTROGEN RS = + 0.47 x HER2 Group Score Ki-67 ER - 0.34 x ER Group Score STK15 PR + 1.04 x Proliferation Group Score + 0.10 x Invasion Group Score Survivin Bcl2 + 0.05 x CD68 Cyclin B1 SCUBE2 - 0.08 x GSTM1 MYBL2 - 0.07 x BAG1 GSTM1 BAG1 INVASION Stromolysin 3 CD68 Category RS (0 – 100) Cathepsin L2 Low risk RS < 18 REFERENCE Int risk RS ≥ 18 and < 31 Beta-actin HER2 GAPDH High risk RS ≥ 31 GRB7 RPLPO HER2 GUS TFRC
  • 74.
  • 75. Expression Data Matrix of 70 Prognostic Markers Genes from Tumors of 78 Breast Cancer Patients Hybridized Using the Custom Microarray Laura J. Van’t Veer
  • 76.
  • 77. Current & Future Trials • Chemotherapy: still looking at the risk of relapse • Endocrine therapies: looking at the sequence • Targeted biological therapies: looking at the best use (combination or sequence) • Targeting angiogenesis and stroma
  • 78. S LE Study Of Letrozole Extension IBCSG 35-07 / BIG 1-07 Coordinating Group: IBCSG
  • 79. S LE After 4 to 6 Years of Prior Adjuvant Endocrine Therapy Postmenopausal, HR-Positive, Node-Positive R Continuous letrozole x 5 yrs A Stratify N Institution Prior ET: D SERM O Intermittent letrozole over 5 yrs AI M Both I 9 mos. 9 mos. 9 mos. 9 mos. 12 mos. Z E 0 6 12 18 24 30 36 42 48 54 60 Extended Adjuvant Endocrine Therapy A: Continuous letrozole 2.5 mg daily for 5 years B: Intermittent letrozole 2.5 mg daily for the first 9 months of years 1 through 4, followed by 12 months in year 5
  • 80. Effect of Intermittent Letrozole Treatment in MCF-7Ca Xenografts 2500 Control Off Letrozole Mean Tumor Volume (mm3) 2250 Her-2 2000 1 5.4 6.7 1.99 0.3 1.1 1750 Letrozole p-Her-2 1500 1 3.1 3.7 2.1 1.3 1.7 p-MAPK 1250 1 4.1 5.9 0.9 0.8 1.1 1000 Back on MAPK 750 Letrozole 1 1 1 0.9 0.9 1 500 Aromatase 1 0.2 0 0.9 2.7 0.8 250 ERα 0 1 0.2 0.1 0.9 2.4 1.1 02 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 ß-Actin Weeks Sabnis G.J. et al. Stopping treatment can reverse acquired resistance to letrozole. Cancer Res 68: 4518-4524, 2008
  • 81. Current & Future Trials • Chemotherapy: still looking at the risk of relapse • Endocrine therapies: looking at the sequence • Targeted biological therapies: looking at the best use (combination or sequence) • Targeting angiogenesis and stroma
  • 82. HER2 Targeted Trial: ALTTO R A Trastuzumab N D Lapatinib O M T Lapatinib I Z Trastuzumab+Lapatinib E 0 6 mos 1 year Target accrual: 8000 patients
  • 83. Current & Future Trials • Chemotherapy: still looking at the risk of relapse • Endocrine therapies: looking at the sequence • Targeted biological therapies: looking at the best use (combination or sequence) • Targeting angiogenesis and stroma
  • 84. Metronomic Therapy (CM) Following Standard Adjuvant Chemotherapy for Patients With ER-Negative and PgR-Negative Breast Cancer IBCSG 22-00 Strata R A Menopausal N ER <10% Status D CT & O Type of CT M PgR <10% Institution I Z CT  CM x 12 mos E Target 900 pts Accrual (6/2008) 718 pts
  • 85. DF/PCC Breast Cancer SPORE Randomized Phase II Trial of Metronomic Chemotherapy ± Bevacizumab CM + bevacizumab CM alone 10 (41%) PR 2 (10%) PR Burstein H., SABCS, 2005
  • 86. BEX Regimen in Advanced BC Bevacizumab 10 mg/kg iv every 2 weeks Cyclophosphamide 50 mg/day orally @ 9 a.m. Capecitabine 500 mg x 3/day orally after meals Dellapasqua S. et al, J Clin Oncol. 26: 4899-4905, 2008
  • 87. BEX Results Best response n % Assessable patients 46 CR 1 3 PR 18 45 SD24 weeks 8 20 SD<24 weeks 8 20 PD 5 13 Overall response (CR+PR) 19 48% 95% CI 32 to 64 Clinical benefit (CR+PR+SD24 weeks) 27 68% 95% CI 51 to 81 Dellapasqua S. et al, J Clin Oncol. 26: 4899-4905, 2008
  • 88. Selected Triple negative TAILORED HER2+ CLINICAL TRIALS Endocrine incompletely responsive Endocrine responsive
  • 89. Thanks to patients, investigators, nurses, data managers, sponsors, and all who are committed to clinical trials for progress in care & knowledge