Temozolomide mechanism of action and resistance

Case contributed by Frank Gaillard
Diagnosis not applicable

The action of temozolomide is influenced by a number of factors, including:

  1. MGMT promoter methylation

  2. presence of mismatch repair

Case Discussion

Temozolomide is an alkylating agent used to treat various tumors, most commonly high-grade astrocytoma and glioblastoma. Its efficacy and likelihood of resulting pseudoprogression or hyper-mutated tumor recurrence are influenced by MGMT promoter methylation and the availability of mismatch repair enzymes.

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