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India’s own CAR-T cell therapy: Availability and Accessibility
Context:
The drugs regulator has granted market authorisation to India's indigenous technique, CAR-T cell therapy for patients with B-cell lymphomas who didn't respond to standard treatments like chemotherapy.
Recent Developments:
- The Central Drugs Standard Control Organisation (CDSCO) has granted market authorisation for NexCAR19, India’s first indigenously-developed CAR-T cell therapy, to ImmunoACT, a company incubated by IIT Bombay.
What is CAR-T cell therapy, and how do CAR-T cells find and destroy cancer cells?
- CAR-T is a revolutionary therapy that modifies immune cells, specifically T-cells, by turning them into potent cancer fighters known as CAR-T cells.
- T-cells are special cells (white blood cells that find and fight illness and infection) whose primary function is cytotoxic, meaning it can kill other cells.
- In CAR-T therapy, we genetically modify them into cancer-fighting cells.
- These supercharged cells are then put back into the body, and they go after cancer cells — especially in blood cancers like leukaemia and lymphomas.
How effective and different is this from other cancer treatments like chemotherapy?
- While chemotherapy and immunotherapy may add a few months or years to a cancer patient’s life, cell-and-gene therapy is designed to cure and provide lifelong benefit.
- It makes treatment easier with a one-time therapy [unlike several sessions of chemotherapy] that can be truly transformative [for a patient]. It’s a lifeline for non-responsive cancer patients.
Is NexCAR19 a type of CAR-T therapy?
- NexCar19 is a type of CAR-T and gene therapy developed indigenously in India by ImmunoACT, which is a company incubated at IIT Bombay.
- The therapy is designed to target cancer cells that carry the CD19 protein.
- This protein acts like a flag on cancer cells, which allows CAR-T cells to recognise and attach themselves to the cancer cells and start the process of elimination.
Who can get the NexCAR19 therapy?
- The therapy is for people with B-cell lymphomas who didn’t respond to standard treatments like chemotherapy, leading to relapse or recurrence of the cancer.
- The patient’s journey starts with a doctor’s prescription at the clinic, followed by donation of blood by the patient at a transfusion centre.
- The blood goes to the lab, where the T-cells are genetically modified. In a week to 10 days, these cells return to the clinic for patient reinfusion.
- Essentially, patients only need to give a blood sample at their clinic, and come back in 7-10 days for reinfusion.
Are children eligible for the therapy too?
- The paediatric trial phase is currently underway at the Tata Memorial Hospital, in collaboration with IIT-Bombay.
- Although the therapy for children will not be any different, for now, ImmunoACT has received CDSCO approval for use in patients aged 15 years and older.
Is India’s indigenous CAR-T cell therapy any more or less effective than CAR-T cell therapies abroad?
- It causes minimal damage to neurons and the central nervous system, a condition known as neurotoxicity.
- Neurotoxicity can sometimes occur when CAR-T cells recognise the CD19 protein and enter the brain, potentially leading to life-threatening situations.
- The therapy also results in minimal Cytokine Release Syndrome (CRS), which is characterised by inflammation and hyperinflammation in the body due to the death of a significant number of tumour cells, as CAR-T cells are designed to target and eliminate cancer cells.
- You can think of this like how the body responds to a virus such as SARS-CoV-2, where the immune response triggers an influx of certain proteins called cytokines, causing a lot of inflammation.
Way Forward:
- The treatment currently costs around 30-40 lakh and with the advancement of technologies, the target is to bring it down to 10-20 lakhs and make it more inclusive.
- The government is planning to make this treatment accessible to all the sections of society in India.
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