Identification of Linkage Disequilibrium SNPs from a Kidney-Yang Deficiency Syndrome Pedigree.
In order to probe the genetic traits of Kidney-yang Deficiency Syndrome (KDS), we employed a national standard of KDS diagnosis for the collection of KDS subjects. Each candidate KDS subject from a typical family was diagnosed by 5 independent physicians of Traditional Chinese Medicine (TCM), and repeated for 3 years, all on the first Saturday of December. Fifteen samples of genomic DNA were isolated and genotyped by Affymetrix 100 K arrays of single nucleotide polymorphism (SNP). Then appropriate tools were used for the analysis of linkage disequilibrium (LD) and bioinformatic mining of LD SNPs. The results indicated that our procedure of TCM diagnosis can effectively collect KDS subjects and therefore provide substantial basis for the linkage analysis of KDS. Five SNPs (i.e. rs514207, rs1054020, rs7685923, rs10515889 and rs10516202) were identified as LD SNPs from this KDS family, representing an unprecedented set of LD SNPs derived from TCM syndrome. These SNPs demonstrate midrange linkage disequilibrium within the KDS family. Two genes with established functions were identified within 100 bp of these SNPs. One is Homo sapiens double cortin domain containing 5, which interacts selectively with mono-, di- or tri-saccharide carbohydrate and involves certain signaling cascades. Another one, leucyl-tRNA synthetase, is also a pleiotropic gene response to cysteinyl-tRNA aminoacylation and protein biosynthesis. In conclusion, KDS is involved in special SNP linkage disequilibrium in the intragenic level, and genes within the flanks of these SNPs suggest some essential symptoms of KDS. However, definitive evidence to confirm or exclude these loci and to establish their biological activities will be required.
Ding
Wei Jun
WJ
Department of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China. Ding2004wj@yahoo.com.cn
Zeng
Ying Zi
YZ
Li
Wei Hong
WH
Zhang
Tian E
TE
Liu
Wei Wei
WW
Teng
Xiao Kun
XK
Ma
Yong Xin
YX
Yan
Shi Lin
SL
Wan
Jennifer Man-Fan
JM
Wang
Mi-Qu
MQ
D005192:Family Health; D005260:Female; D005838:Genotype; D006801:Humans; D007674:Kidney Diseases / Q000235:genetics*; D015810:Linkage Disequilibrium; D008297:Male; D008516:Medicine, Chinese Traditional; D010375:Pedigree; D020641:Polymorphism, Single Nucleotide; D016711:Yang Deficiency / Q000235:genetics*