High Quality Tazemetostat Light Yellow Solid CAS 1403254-99-8

Tazemetostat More Info

Tazemetostat is a small molecule, orally bioavailable pharmaceutical agent classified as a targeted cancer therapy. Its specific CAS Registry Number is 1403254-99-8. The compound is a potent and highly selective inhibitor designed to bind to the active site of a specific epigenetic regulator. Its molecular structure is engineered for high affinity and specificity, enabling it to precisely interfere with a key enzymatic process involved in controlling gene expression, which is frequently dysregulated in certain cancers.

The primary mechanism of action for Tazemetostat is the selective inhibition of the enhancer of zeste homolog 2 methyltransferase. This enzyme is responsible for catalyzing the addition of methyl groups to histone H3, a modification that typically leads to gene silencing. In many cancers, EZH2 is overactive or mutated, resulting in the inappropriate silencing of tumor suppressor genes. By inhibiting EZH2, Tazemetostat reverses this repressive epigenetic mark, thereby reactivating the expression of genes that control cellular differentiation and proliferation, leading to the arrest of cancer cell growth.

The clinical application of Tazemetostat is indicated for the treatment of specific cancers defined by underlying molecular alterations. It is approved for use in adults and adolescents with metastatic or locally advanced epithelioid sarcoma not eligible for complete resection, a rare soft tissue cancer often associated with the loss of a tumor suppressor protein called INI1. Furthermore, it is approved for certain relapsed or refractory follicular lymphoma patients whose tumors carry an EZH2 mutation, as well as for those with no satisfactory alternative treatment options, representing a paradigm of histology-agnostic, biomarker-driven therapy.

This targeted therapy is administered orally in the form of film-coated tablets, typically taken twice daily. The availability of an oral formulation allows for convenient outpatient treatment, significantly improving the patient's quality of life compared to traditional intravenous chemotherapies. Dosing is continuous in 28-day cycles, and treatment is often prolonged, requiring ongoing monitoring of efficacy and safety by an oncology team. Adherence to the prescribed schedule is crucial for maintaining therapeutic drug levels.

The safety profile of Tazemetostat is distinct from that of conventional chemotherapy, as it targets a specific protein rather than broadly affecting rapidly dividing cells. Common adverse effects observed in clinical trials include fatigue, nausea, decreased appetite, musculoskeletal pain, and constipation. More serious potential risks involve secondary malignancies, particularly the development of T-cell lymphoblastic lymphoma, and embryofetal toxicity. Regular patient monitoring through blood tests and clinical assessments is essential throughout the treatment course to manage these risks effectively.

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