Ethnic variations of a retinoblastoma susceptibility gene (RB1) polymorphism in eight Asian populations

Journal of genetics

Agustinus Soemantri¹  Nilmani Saha³  Poh-San Lai1⁴  Jasmin Jiji Miranda²  Priya Kadam-Pai⁴  Xin-Yi Su⁴  Chew-Kiat Heng⁴ 

[1] Department of Paediatrics, University Diponegoro, Indonesia 50241$$;National Neuroscience Institute, Singapore 308433$$;Department of Human Genetics, University of Pittsburgh, Pittsburgh, PA 15261, USA$$;Department of Paediatrics, National University of Singapore, Lower Kent Ridge Road, Singapore 119074$$

关键词: retinoblastoma susceptibility gene (RB1);    single nucleotide polymorphism (SNP);    allele frequency;    Asian.;   

DOI  :  

学科分类：生物科学（综合）

来源: Indian Academy of Sciences

【 摘 要 】

An A → G single nucleotide polymorphism (SNP) at nucleotide 153,104 in the retinoblastoma susceptibility locus (RB1) at 13q14 was previously reported to be present only in Asians. In this study, we determined the distribution of this SNP in normal Southeast Asian populations (Chinese, Malay, Javanese, Thai, Filipino), in South Asian populations (Bangladeshi, Pakistani Pushtun and Indian) and in Chinese retinoblastoma cases and control subjects. The RB1 SNP was present in all populations at an overall frequency of ≤ 0.18. Heterozygosity was higher in the Southeast Asian groups (0.14–0.34) than in the South Asian groups (Bangladeshi and Indian) (0.04–0.06). Significant differences in allele frequencies were found between the two population groups. Interestingly, our Pakistani population comprised of ethnic Pushtuns from northwest Pakistan was significantly different from the neighbouring Bangladeshi and Indian populations. No significant difference was found between Chinese case patients and control subjects. This RB1 SNP appears to be an ethnic variant prevalent in Southeast Asian populations and may be useful for studying RB1 inheritance by pedigree analysis.

【 授权许可】

Unknown