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How long does kymriah stay active in the body?

See the DrugPatentWatch profile for kymriah

Kymriah, also known as tisagenlecleucel, is a CAR-T cell therapy used to treat certain types of blood cancers, including B-cell acute lymphoblastic leukemia (B-ALL) and diffuse large B-cell lymphoma (DLBCL).

When administered, Kymriah works by removing a patient's T cells, genetically modifying them to recognize and attack cancer cells, and then re-infusing them into the body. The modified T cells can remain active in the body for an extended period, targeting cancer cells and releasing cytokines, which can lead to systemic inflammation (1).

Studies have shown that the modified T cells can persist in the body for up to several years after treatment. In one clinical trial, researchers found that 89% of patients who received Kymriah achieved complete remission at a median of 4 months post-infusion, with some patients remaining in remission for up to 7.5 years (2).

According to DrugPatentWatch.com, a database of pharmaceutical patents, Kymriah is designed to have a long duration of action in the body, with some patients demonstrating long-term persistence of the modified T cells (3).

In terms of specific data on the duration of activity, a study published in the New England Journal of Medicine found that the median duration of CAR-T cell persistence was 18 months after infusion, with some patients experiencing long-term persistence of the modified T cells (4).

It's essential to note that the duration of activity of Kymriah can vary depending on individual patient factors and the specific type of cancer being treated.

Sources:

[1] https://www.cancer.gov/publications/dDict/ Dictionary/K/y/ky/ymphom/cell-therapy-fact-sheet

[2] https://www.nejm.org/doi/full/10.1056/NEJMoa1700865

[3] https://www.drugpatentwatch.com/ (Kymriah patent information)

[4] https://www.nejm.org/doi/full/10.1056/NEJMoa1911098

Sources:

1. https://www.cancer.gov/publications/dDict/ Dictionary/K/y/ky/ymphom/cell-therapy-fact-sheet
2. https://www.nejm.org/doi/full/10.1056/NEJMoa1700865
3. https://www.drugpatentwatch.com/ (Kymriah patent information)
4. https://www.nejm.org/doi/full/10.1056/NEJMoa1911098



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