TITLE

Microsatellite DNA polymorphism of human adrenomedullin gene in type 2 diabetic patients with renal failure

AUTHOR(S)
Ishimitsu, Toshihiko; Tsukada, Kohju; Minami, Junichi; Ono, Hidehiko; Ohrui, Masami; Hino, Jun; Kangawa, Kenji; Matsuoka, Hiroaki
PUB. DATE
June 2003
SOURCE
Kidney International;Jun2003, Vol. 63 Issue 6, p2230
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Microsatellite DNA polymorphism of human adrenomedullin gene in type 2 diabetic patients with renal failure. Background. Adrenomedullin (AM) is a hypotensive peptide widely produced in the cardiovascular organs and tissues such as the heart, kidney, and the vascular cells. We have previously cloned and sequenced the genomic DNA encoding human AM gene, and determined that the gene is located in the short arm of chromosome 11. The 3′-end of the gene is flanked by the microsatellite marker of cytosine adenine (CA) repeats. In this study, we investigated the association between DNA variations in AM gene and the predisposition to develop nephropathy in type 2 diabetes mellitus. Methods. Genomic DNA was obtained from the peripheral leukocytes of 233 normal healthy subjects (NH), 139 type 2 diabetic patients on hemodialysis (DM-HD), 106 control patients with type 2 diabetes without nephropathy (DM-C) and 318 hemodialysis patients due to chronic glomerulonephritis (CGN-HD). The genomic DNA was subject to polymerase chain reaction (PCR) using a fluorescence-labeled primer, and the number of CA repeats were determined by polyacrylamide gel electrophoresis (PAGE). Results. In our Japanese subjects, there existed four types of alleles with different CA-repeat number; 11, 13, 14, and 19. The frequencies of these alleles were 11: 27.7%, 13: 32.8%, 14: 35.6%, and 19: 3.9% in NH. These allele frequencies were not significantly different in DM-C and CGN-HD. However, DM-HD showed significantly different distribution of allele frequency from other groups (χ2 = 18.9, P = 0.026). Namely, the frequency of 19-repeat allele in DM-HD was higher (9.0%) than NH, DM-C, and CGN-HD (P = 0.005, 0.041, and 0.004, respectively). Conclusion. The microsatellite DNA polymorphism of AM gene may be associated with the genetic predisposition to develop nephropathy in Japanese patients with type 2 diabetes mellitus.
ACCESSION #
9732446

 

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