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The wellbeing of parents of children with autism residing in mainland China remains understudied. We aimed to examine whether and how parental perceived social support, individualism, and collectivism acted together to moderate the relationships between child behavior problems and parental psychological distress in Chinese parents of children with autism. With convenience and snowball sampling, data on 268 primary caregiver parents of children with autism were collected from an online cross-sectional survey. Linear regression analysis indicated that child behavior problems were significantly associated with increased psychological distress in Chinese parents of children with autism. There was no evidence to support the stress-buffering model of social support in moderation analysis of the association between child behavior problems and parental psychological distress. Nonetheless, increased social support was associated with lower levels of parental psychological distress. Moderated moderation analyses did not support a role for individualism or collectivism as a moderator of the putative buffering role of social support. However, there was evidence that parental individualism was associated with increased parental psychological distress. Our findings highlight that child behavior problems are a robust correlate of parental psychological distress, and parental social support may act as a compensatory factor promoting less psychological distress rather than having a protective role. The role of social support and cultural values in the wellbeing of parents of children with autism in China requires additional exploration, including longitudinal research designs., (© 2024 The Authors. Autism Research published by International Society for Autism Research and Wiley Periodicals LLC.)

Cytochrome P4501B1 (CYP1B1) is involved in the activation of many carcinogens and in the metabolism of steroid hormones, including 17beta-oestradiol (E2) and testosterone. We report a significant difference in the allele frequencies of two point mutations in the coding region of the CYP1B1 gene among Caucasian (n = 189), African-American (n = 52) and Chinese (Linxian) (n = 109) populations. A (C to G) transversion at position 1666 in exon 3, which results in an amino acid substitution of Leu432 to Val, was present in African-Americans with an allele frequency for Va1432 of 0.75, in Caucasians of 0.43, and in Chinese of 0.17. A (C to T) transition at position 1719 in exon 3, with no amino acid change (Asp449), appeared to be closely linked with the Val432 variant. Results using human lung microsomal preparations from individuals with the CYP1B1Val/Val and CYP1B1Leu/Leu genotypes indicate that Val432 variant may be a high activity allele and thus may contribute to the interindividual differences in CYP1B1 activity. Because CYP1B1 is involved in hormone and carcinogen metabolism, and given the disparate rates of prostate cancer among ethnic groups, we also evaluated the association of the CYP1B1 Leu432Val polymorphism with prostate cancer risk in a pilot case-control study. Among Caucasians, 34% of men with cancer (n = 50) were homozygous for the Val432 polymorphism, while only 12% of matched control subjects (n = 50) had this genotype. These preliminary data indicate that genetic polymorphisms in CYP1B1 might play an important role in human prostate carcinogenesis.