Genetic variants of the fatty acid desaturase gene cluster are associated with plasma LDL cholesterol levels in Japanese males.
Fatty acid (FA) compositions in tissues are related to metabolic disorders, and consequently the appropriate management of underlying FA compositions in tissues is considered to be important. However, the relationship among the serum lipid profiles, the FA composition of the red blood cell (RBC) membranes and genetic variations in the fatty acid desaturase (FADS) genes in Japanese men is unclear. In this study, the subjects recruited were 137 Japanese men, 40 to 60 y old, who had a regular health checkup. Their serum lipid profile and the relative FA composition of the RBC membranes were measured. They were genotyped for the single nucleotide polymorphisms (SNPs) rs174553, rs174546, rs99780 and rs174583 in FADS gene. Multiple regression analysis was conducted to detect the relationship among hyperlipidemia, the FA composition of the RBC and the FADS genotypes. As a result, the homozygous genotype for the minor alleles in rs174553, rs174546, rs99780 were found to be associated with lower low-density lipoprotein cholesterol (LDL-C) levels and a lower LDL-C/total-cholesterol ratio. The homozygous genotype for the minor alleles reduced the risk of high LDL-C level (R2=0.50, β=-0.20, p=0.009), whereas, the arachidonic acid (AA) levels in the carriers of the homozygous genotype for the minor alleles tended to be lower compared with the carriers of the major alleles. However, no significant differences were observed in any FA level among the three genotypes for four SNPs. These results indicate that the appropriate management of serum LDL-C levels depending on genetic predisposition in FADS genotypes should be encouraged.
Institute of Environmental Science for Human Life, Ochanomizu University.
Yasuko
Y
Sone
Toshimi
T
Kido
Tomomi
T
Ainuki
Mariko
M
Sonoda
Ikuyo
I
Ichi
Satoru
S
Kodama
Hirohito
H
Sone
Kazuo
K
Kondo
Yutaka
Y
Morita
Shigenobu
S
Egawa
Kazuo
K
Kawahara
Yuzuru
Y
Otsuka
Yoko
Y
Fujiwara
D000328:Adult; D000483:Alleles; D016718:Arachidonic Acid / Q000097:blood; D044466:Asian People / Q000235:genetics; D008078:Cholesterol, LDL / Q000097:blood / Q000235:genetics*; D004912:Erythrocytes / Q000378:metabolism; D044943:Fatty Acid Desaturases / Q000235:genetics* / Q000378:metabolism; D005227:Fatty Acids / Q000097:blood / Q000235:genetics*; D005838:Genotype; D006720:Homozygote; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D005810:Multigene Family; D020641:Polymorphism, Single Nucleotide
D008078:Cholesterol, LDL; D005227:Fatty Acids; D016718:Arachidonic Acid; D044943:Fatty Acid Desaturases