Ibrutinib（CAS NO.936563-96-1） is not a chemotherapy drug but one of what are termed "targeted therapies." Targeted therapy is the result of years of research dedicated to understanding the differences between cancer cells and normal cells. To date, cancer treatment has focused primarily on killing rapidly dividing cells because one feature of cancer cells is that they divide rapidly. Unfortunately, some of our normal cells divide rapidly too, causing multiple side effects.
Targeted therapy is about identifying other features of cancer cells. Scientists look for specific differences in the cancer cells and the normal cells. This information is used to create a targeted therapy to attack the cancer cells without damaging the normal cells, thus leading to fewer side effects. Each type of targeted therapy works a little bit differently but all interfere with the ability of the cancer cell to grow, divide, repair and/or communicate with other cells.
Ibrutinib inhibits the function of Bruton's tyrosine kinase (BTK). BTK is a key signaling molecule of the B-cell receptor signaling complex that plays an important role in the survival of malignant B cells. Ibrutinib blocks signals that stimulate malignant B cells to grow and divide uncontrollably.
Research continues to identify which cancers may be best treated with targeted therapies and to identify additional targets for more types of cancer.
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