Preliminary studies on associations of IDDM3, IDDM4, IDDM5 and IDDM8 with IDDM in Chengdu population.
OBJECTIVE
To study the associations of IDDM3, IDDM4, IDDM5 and IDDM8 with insulin-dependent diabetes mellitus (IDDM).


METHODS
The polymorphisms of short tandem repeat (STR) loci D15S657, D11S1369, D6S2420 and D6S503, linked to IDDM3, IDDM4, IDDM5 and IDDM8 respectively, were studied by polymerase chain reaction and polyacrylamide gel electrophoresis (PCR-PAGE) followed by direct sequencing of PCR products in 105 normal Chinese Han nationality subjects and 48 patients with IDDM.


RESULTS
The allele frequencies of allele A5 at D15S657 locus, allele A5 at D11S1369 locus and allele A4 at D6S2420 locus were increased significantly in patients with IDDM compared to those in the control group. No difference in the allele frequencies at D6S503 locus was observed between IDDM and control group.


CONCLUSIONS
IDDM3, IDDM4, IDDM5 but not IDDM8 may be associated with IDDM in Chinese Han nationality population.
Zhoucun
A
A
Department of Medical Genetics, First Affiliated Hospital, West China University of Medical Sciences, Chengdu 610041.
Zhang
S
S
Xiao
C
C
D000293:Adolescent; D000328:Adult; D000483:Alleles; D044466:Asian People; D002648:Child; D002681:China; D002880:Chromosomes, Human, Pair 11; D002884:Chromosomes, Human, Pair 15; D002896:Chromosomes, Human, Pair 6; D003922:Diabetes Mellitus, Type 1 / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D008875:Middle Aged; D020080:Tandem Repeat Sequences