TY - JOUR
T1 - Polymorphisms in the 3' UTR in the neurocalcin delta gene affect mRNA stability, and confer susceptibility to diabetic nephropathy
AU - Kamiyama, Masumi
AU - Kobayashi, Masaaki
AU - Araki, Shin-ichi
AU - Iida, Aritoshi
AU - Tsunoda, Tatsuhiko
AU - Kawai, Koichi
AU - Imanishi, Masahito
AU - Nomura, Makoto
AU - Babazono, Tetsuya
AU - Iwamoto, Yasuhiko
AU - Kashiwagi, Atsunori
AU - Kaku, Kohei
AU - Kawamori, Ryuzou
AU - Ng, Daniel P K
AU - Hansen, Torben
AU - Gaede, Peter
AU - Pedersen, Oluf
AU - Nakamura, Yusuke
AU - Maeda, Shiro
PY - 2007
Y1 - 2007
N2 - Using a large-scale genotyping analysis of gene-based single nucleotide polymorphisms (SNPs) in Japanese type 2 diabetic patients, we have identified a gene encoding neurocalcin delta (NCALD) as a candidate for a susceptibility gene to diabetic nephropathy; the landmark SNP was found in the 3' UTR of NCALD (rs1131863: exon 4 +1340 A vs. G, P = 0.00004, odds ratio = 1.59, 95% CI 1.27-1.98). We also discovered two other SNPs in exon 4 of this gene (+999 T/A, +1307 A/G) that showed absolute linkage disequilibrium to the landmark SNP. Subsequent in vitro functional analysis revealed that synthetic mRNA corresponding to the disease susceptible haplotype (exon 4 +1340 G, +1307 G, +999 A) was degraded faster than mRNA corresponding to the major haplotype (exon 4 +1340 A, +1307 A, +999 T), and allelic mRNA expression of the disease susceptibility allele was significantly lower than that of the major allele in normal kidney tissues. In an experiment using a short interfering RNA targeting NCALD, we found that silencing of the NCALD led to a considerable enhancement of cell migration, accompanied by a significant reduction in E-cadherin expression, and by an elevation of alpha smooth muscle actin expression in cultured renal proximal tubular epithelial cells. We also identified the association of the landmark SNP with the progression of diabetic nephropathy in a 8-year prospective study (A vs. G, P = 0.03, odds ratio = 1.91, 95% CI 1.07-3.42). These results suggest that the NCALD gene is a likely candidate for conferring susceptibility to diabetic nephropathy.
AB - Using a large-scale genotyping analysis of gene-based single nucleotide polymorphisms (SNPs) in Japanese type 2 diabetic patients, we have identified a gene encoding neurocalcin delta (NCALD) as a candidate for a susceptibility gene to diabetic nephropathy; the landmark SNP was found in the 3' UTR of NCALD (rs1131863: exon 4 +1340 A vs. G, P = 0.00004, odds ratio = 1.59, 95% CI 1.27-1.98). We also discovered two other SNPs in exon 4 of this gene (+999 T/A, +1307 A/G) that showed absolute linkage disequilibrium to the landmark SNP. Subsequent in vitro functional analysis revealed that synthetic mRNA corresponding to the disease susceptible haplotype (exon 4 +1340 G, +1307 G, +999 A) was degraded faster than mRNA corresponding to the major haplotype (exon 4 +1340 A, +1307 A, +999 T), and allelic mRNA expression of the disease susceptibility allele was significantly lower than that of the major allele in normal kidney tissues. In an experiment using a short interfering RNA targeting NCALD, we found that silencing of the NCALD led to a considerable enhancement of cell migration, accompanied by a significant reduction in E-cadherin expression, and by an elevation of alpha smooth muscle actin expression in cultured renal proximal tubular epithelial cells. We also identified the association of the landmark SNP with the progression of diabetic nephropathy in a 8-year prospective study (A vs. G, P = 0.03, odds ratio = 1.91, 95% CI 1.07-3.42). These results suggest that the NCALD gene is a likely candidate for conferring susceptibility to diabetic nephropathy.
KW - 3' Untranslated Regions
KW - Alleles
KW - Base Sequence
KW - Case-Control Studies
KW - Cells, Cultured
KW - Cohort Studies
KW - DNA Primers
KW - DNA-Binding Proteins
KW - Diabetes Mellitus, Type 2
KW - Diabetic Neuropathies
KW - Gene Expression Profiling
KW - Genetic Predisposition to Disease
KW - Humans
KW - Linkage Disequilibrium
KW - Neurocalcin
KW - Polymorphism, Single Nucleotide
KW - Prospective Studies
KW - RNA Interference
KW - RNA Stability
KW - RNA, Messenger
KW - Transcription Factors
U2 - 10.1007/s00439-007-0414-3
DO - 10.1007/s00439-007-0414-3
M3 - Journal article
C2 - 17671797
SN - 0340-6717
VL - 122
SP - 397
EP - 407
JO - Human Genetics
JF - Human Genetics
IS - 3-4
ER -