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UGT1A1*28 polymorphism influences glucuronidation of bazedoxifene
The UGT1A1*28 genetic variation significantly impacts how the body processes bazedoxifene, a drug used for osteoporosis. This polymorphism leads to substantially reduced metabolic clearance, especially in individuals with the *28/*28 genotype.
Area of Science:
- Pharmacogenomics
- Drug Metabolism
- Osteoporosis Therapeutics
Background:
- Bazedoxifene is a selective estrogen receptor modulator used for osteoporosis.
- Its metabolism involves UDP-glucuronosyltransferases (UGTs).
- A common UGT1A1*28 polymorphism affects related drug pharmacokinetics.
Purpose of the Study:
- To investigate the influence of the UGT1A1*28 polymorphism on bazedoxifene metabolism.
- To determine if genetic variations in UGT1A1 affect bazedoxifene's metabolic clearance.
Main Methods:
- Genotyped human liver microsomes were used to study bazedoxifene metabolism.
- Formation clearance of bazedoxifene metabolites (M4 and M5) was measured across different UGT1A1 genotypes.
Main Results:
- The UGT1A1*28 allele significantly influenced the formation clearance of both bazedoxifene metabolites.
- Microsomes from *28/*28 homozygotes showed a 7 to 10-fold decrease in metabolic clearance compared to other genotypes.
Conclusions:
- The UGT1A1*28 genotype has a significant effect on bazedoxifene's intrinsic metabolic clearance.
- These findings warrant further in vivo investigation and provide valuable insights for pharmacogenomic research related to bazedoxifene.
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