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Gene therapy in Cancer treatment

A brief ppt on Gene Therapy

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Gene therapy in Cancer treatment

  1. 1. Main Cause ◊ Mutations in its DNA Reason  Exposure to Carcinogens (e.g. tobacco)  Exposure to Viruses  Epigenetic factors (e.g. tumour promoter effects)  Activation of Proto- oncogenes to Oncogenes  Inactivation of Tumour Suppressor genes (e.g. BRCA1 & 2)
  2. 2.  Use of nucleic acids for treatment, cure or prevention  Replacement of a defective gene with its functional copy
  3. 3. » Main Types 1. Immunotherapy 2. Oncolytic Virotherapy 3. Gene Transfer
  4. 4.  Uses GM cells and viral particles to stimulate the immune system to destroy cancer cells; e.g. lung cancer.
  5. 5.  Uses viral particles that replicate within the cancer cell to cause cell death; e.g. metastatic cancers.
  6. 6.  Introduces new genes into a cancerous cell or the surrounding tissue to cause cell death or slow the growth of cancer; e.g. in solid tumours.
  7. 7. » Some Therapeutic Approaches
  8. 8.  by introducing specificity into T cells Delivering CAR Recognize antigen of choice on cancer cells Facilitate tumour cell recognition Formation of activated T cells Killing of Target cells Immunotherapy
  9. 9.  By restoration of functional p53 using a recombinant adenovirus expressing under a Rous sarcoma virus promoter.  This is the first commercialized gene therapy, named GendicineTM.  By in vivo intratumoural injection. Gene Transfer
  10. 10.  HSV-TKase (vector NV1020) has been used to convert the prodrug Ganciclovir into cytotoxic triphosphate ganciclovir.  Commercial example: Cerepro (cytomegalovirus promoter). Oncolytic Virotherapy
  11. 11. Cancer Type Commercial Name Approach Type of Therapy Prostate Cancer Prostvac TRICOM vector vaccine Immunotherapy Soft Tissue Sarcoma TNFerade Adenoviral vector Gene Transfer Pancreatic Cancer Rexin-G Retroviral vector Gene Transfer
  12. 12. Serenities 1. iPSC technology 2. Hope for orphan and other diseases Concerns 1. Translation of iPSC technology into the clinics 2. AAV immunogenicity
  13. 13. 1. Cross D and Burmester JK (2006), Gene Therapy for Cancer Treatment: Past, Present and Future; Clinical Medicine & Research Volume 4, Number 3: 218-227 2. Kaufmann KB, Büning H, Galy A, Schambach A, Grez M; Gene therapy on the move; EMBO Mol Med (2013) 5, 1642–1661 3. Das SK, Menezes ME, Bhatia S, Wang XY, Emdad L, Sarkar D and Fisher PB; Gene Therapies for Cancer: Strategies, Challenges and Successes; J Cell Physiol. 2015 February ; 230(2): 259–271. doi:10.1002/jcp.24791. 4. Baban CK, Cronin M, O’Hanlon D, O’Sullivan GC and Tangney M (2010); Bacteria as vectors for gene therapy of cancer; Bioengineered Bugs 1:6, 385-394.
  14. 14. Thank you