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http://dx.doi.org/10.47102/annals-acadmedsg.2020405DOI Listing

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Background: Carbamazepine is one of the most widely used antiepileptic drugs. Carbamazepine has been shown to be toxic to cells. Cilostazol, an antiplatelet agent, has known antioxidant, antiproliferative, anti-inflammatory, and anti-tumor effects.

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Effects of species of origin and mode of induction of microsomes on carbamazepine-induced cell toxicity.

J Pharmacol Toxicol Methods

July 2024

Department of Paediatrics, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada; Robarts Research Institute, University of Western Ontario, London, Ontario, Canada.

Article Synopsis
  • Standardization and validation of in vitro drug metabolism are crucial for drug development and toxicity testing, particularly in assays like the lymphocyte toxicity assay (LTA) and in vitro platelet toxicity assay (iPTA).
  • The study focused on how the species of origin and different induction agents affect the metabolic capacities of isolated liver microsomes (MICs) when bioactivating carbamazepine (CBZ), with cytotoxicity as a key measure.
  • Results showed that MICs from minipigs and rat MICs conditioned with 3-methylcholanthrene (3MC) produced the most cytotoxic metabolites, offering insights to improve in vitro toxicity assays and guiding pre-clinical drug investigations.
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Importance: The HLA-B*15:02 allele has been associated with an increased risk of carbamazepine-induced Stevens-Johnson syndrome and toxic epidermal necrolysis in specific Asian populations (including Han Chinese, Malaysian, Thai, and Vietnamese individuals). While HLA-B*15:02 genotype testing in Asian populations is recommended by several international prescribing guidelines, it is not subsidized by the Medicare Benefits Schedule in Australia.

Objective: To evaluate the cost-effectiveness of HLA-B*15:02 genotyping in Asian Australian patients with epilepsy.

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