Association between HLA‐B*1502 and carbamazepine‐induced severe cutaneous adverse drug reactions in a Thai population
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Open Access
- 22 April 2010
- Vol. 51 (5) , 926-930
- https://doi.org/10.1111/j.1528-1167.2010.02533.x
Abstract
Summary: Carbamazepine (CBZ) has been reported as the most common culprit drug for Stevens‐Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) in several Asian countries including Thailand. A strong association between HLA‐B*1502 and CBZ‐induced SJS/TEN has been reported in Han Chinese but not in Caucasian and Japanese populations. A case–control study was conducted to determine whether HLA‐B*1502 is a valid pharmacogenetic test for SJS/TEN caused by CBZ in a Thai population. Among 42 CBZ‐induced patients with SJS/TEN, 37 (88.10%) patients carried the HLA‐B*1502 while only 5 (11.90%) of the CBZ‐tolerant controls had this allele. The risk of CBZ‐induced SJS/TEN was significantly higher in the patients with HLA‐B*1502, with an odds ratio (OR) of 54.76 [95% confidence interval (CI) 14.62–205.13, p = 2.89 × 10−12]. The sensitivity and specificity of HLA‐B*1502 for prediction of CBZ‐induced SJS/TEN were 88.10%. By assuming a 0.27% as a prevalence rate of CBZ‐induced SJS/TEN in a Thai population, the positive predictive value (PPV) and negative predictive value (NPV) of the HLA‐B*1502 were 1.92% and 99.96%. Results from this study suggest that HLA‐B*1502 may be a useful pharmacogenetic test for screening Thai individuals who may be at risk for CBZ‐induced SJS and TEN.Keywords
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