Genetic screening of the lipoprotein lipase gene for mutations in Chinese subjects with or without hypertriglyceridemia.
OBJECTIVE
To investigate the association between the mutations in lipoprotein lipase gene and hypertriglyceridemia (HTG).


METHODS
The lipoprotein lipase (LPL) gene was screened for mutations in 386 Chinese subjects with (108 cases in the HTG group) or without HTG (278 cases in the control group), by single-strand conformation polymorphism (SSCP) analysis and DNA sequencing.


RESULTS
One novel silent mutation L103L, one missense mutation P207L, three splicing mutations Int3/3'-ass/C(-6) --> T, and the common S447X polymorphism has been identified in the whole coding region and exon-intron junctions of the LPL gene were examined. Heterozygous P207L found in the HTG group was the first case reported in Asia and subsequently another P207L heterozygote was found in the proband's family, all of which suggested that P207L was one of the causes of familial combined hyperlipidemia, but was not so prevalent as that in French Canadian. Int3/3'-ass/C(-6) --> T was found in both groups in the present study although it was regarded as a pathogenic variant to HTG earlier on. Moreover about the beneficial polymorphism S447X, there was also some supportive evidence that the levels of triglycerides (TG) in S447X carriers were significantly lower than noncarriers in the subjects without HTG.


CONCLUSIONS
The association between the LPL variants and HTG is quite complicated and versatile, genotyping of LPL in a larger-scale screening should be necessary and justifiable.
Yang
Yuhong
Y
Department of Biochemistry, Tianjin Medical University, Tianjin 300070, China.
Mu
Yunxiang
Y
Zhao
Yu
Y
Liu
Xinyu
X
Zhao
Lili
L
Wang
Junmei
J
Xie
Yonghong
Y
D000293:Adolescent; D000328:Adult; D000368:Aged; D044466:Asian People / Q000235:genetics*; D001483:Base Sequence; D016022:Case-Control Studies; D004252:DNA Mutational Analysis; D005091:Exons / Q000235:genetics; D005260:Female; D005820:Genetic Testing; D006579:Heterozygote; D006801:Humans; D015228:Hypertriglyceridemia / Q000097:blood / Q000235:genetics*; D008055:Lipids / Q000097:blood; D008071:Lipoprotein Lipase / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009154:Mutation; D010375:Pedigree; D018807:Polymorphism, Single-Stranded Conformational
D008055:Lipids; D008071:Lipoprotein Lipase