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The drugs differ in their mechanism and side-effects. The biggest advantage is minimising the chances of resistance developing to any one agent. Also, the drugs can often be used at lower doses, reducing toxicity. [6]: 55–59 [7]: 17–18 [5]
Aprepitant has been shown to inhibit both the acute and delayed emesis induced by cytotoxic chemotherapeutic drugs by blocking substance P landing on receptors in the brains neurons. Indeed, positron emission tomography (PET) studies have shown that aprepitant can penetrate the brain and NK 1 receptors in the brain. [12]
Steroidogenesis.Trilostane inhibits 3β-HSD. Trilostane is a steroidogenesis inhibitor. [1] It is specifically an inhibitor of 3β-hydroxysteroid dehydrogenase (3β-HSD). [1] [15] As a result of this action, trilostane blocks the conversion of Δ 5-3β-hydroxysteroids, including pregnenolone, 17α-hydroxypregnenolone, dehydroepiandrosterone (DHEA), and androstenediol, into Δ 4-3-ketosteroids ...
Bone marrow suppression is a serious side effect of chemotherapy and certain drugs affecting the immune system such as azathioprine. [2] The risk is especially high in cytotoxic chemotherapy for leukemia. In the case of non-small-cell lung cancer, myelosuppression predisposition was shown to be modulated by enhancer mutations. [3]
Although it is not commercialised as antibiotic due to its adverse effects, its modified compound (ester derivative) is an approved immunosuppressant drug in kidney, heart, and liver transplantations, and is marketed under the brands Cellcept (mycophenolate mofetil by Roche) and Myfortic (mycophenolate sodium by Novartis).
Cyclophosphamide (CP), also known as cytophosphane among other names, [3] is a medication used as chemotherapy and to suppress the immune system. [4] As chemotherapy it is used to treat lymphoma, multiple myeloma, leukemia, ovarian cancer, breast cancer, small cell lung cancer, neuroblastoma, and sarcoma. [4]
There are 407 FDA-approved drugs which may interact with lomustine. Many of these interactions are due to severe side-effects of this chemotherapy, which are incompatible other drugs' known side effects. [18] Lomustine is contraindicated in the administration of most live vaccines during treatment, due to infection risk.
Researchers can either look for cytotoxic compounds, if they are interested in developing a therapeutic that targets rapidly dividing cancer cells, for instance; or they can screen "hits" from initial high-throughput drug screens for unwanted cytotoxic effects before investing in their development as a pharmaceutical. [3]