ApolipoproteinA1-75 G/A (M1-) polymorphism and lipoprotein(a); anti- vs. pro-Atherogenic properties.
BACKGROUND
ApolipoproteinA1 (apoA1) is the major apoprotein constituent of high-density-lipoprotein(HDL). The relationship of apoA1 -75 bp(M1-) allele polymorphism with lipoprotein phenotype and cardiovascular disease (CVD) remain unclear. Overnight fasting blood samples were collected from a cohort of high-risk Omani population, 90 non-diabetic subjects and 149 type 2 diabetes mellitus (T2DM) subjects for genotype and phenotype studies.


RESULTS
The M1+ and M1- alleles frequencies were 0.808 and 0.192 for M1+ and M1-, respectively, comparable to the frequency of apoA1 (M1+ and M1-) amongst a healthy Omani population, 0.788 and 0.212, respectively. The frequencies of the hetero- and homozygous subjects for the MspI polymorphism at -75 (M1-) of the apoA1 gene were in Hardy-Weinberg equilibrium. The mean Lp(a) concentration was significantly higher(P = 0.02) in subjects carrying M1- allele compared to M1+ allele of the APOA1 gene with an odd ratio of 2.3(95% CI, 1.13-14.3), irrespective of gender and the diabetic status.


CONCLUSIONS
ApolipoproteinA1-75 G/A (M1-) polymorphism is relatively common and is positively associated with Lp(a) and therefore, may confer a potential risk for cardiovascular disease (CVD).
Department of Clinical biochemistry, St Mary's Hospital, Newport, Isle of Wight, PO30 5TG, UK. aliihsanalbahrani@hotmail.com
Ali I
AI
Albahrani
Jannete J
JJ
Usher
Mohammed
M
Alkindi
Eileen
E
Marks
L
L
Ranganath
Said
S
Al-yahyaee
D000225:Adenine; D016632:Apolipoprotein A-I / Q000097:blood / Q000235:genetics*; D050197:Atherosclerosis / Q000235:genetics*; D005787:Gene Frequency; D006580:Genetic Carrier Screening; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006147:Guanine; D006720:Homozygote; D006801:Humans; D017270:Lipoprotein(a) / Q000097:blood / Q000235:genetics*; D011110:Polymorphism, Genetic; D020641:Polymorphism, Single Nucleotide; D011401:Promoter Regions, Genetic; D012307:Risk Factors; D014280:Triglycerides / Q000097:blood
D016632:Apolipoprotein A-I; D017270:Lipoprotein(a); D014280:Triglycerides; D006147:Guanine; D000225:Adenine