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Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nephrol+Dial+Transplant 2014 ; 29 (4): 864-72 Nephropedia Template TP
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DNA methylation profile associated with rapid decline in kidney function: findings from the CRIC Study #MMPMID24516231
Nephrol Dial Transplant 2014[Apr]; 29 (4): 864-72 PMID24516231show ga
Background: Epigenetic mechanisms may be important in the progression of chronic kidney disease (CKD). Methods: We studied the genome-wide DNA methylation pattern associated with rapid loss of kidney function using the Infinium HumanMethylation 450 K BeadChip in 40 Chronic Renal Insufficiency (CRIC) study participants (n = 3939) with the highest and lowest rates of decline in estimated glomerular filtration rate. Results: The mean eGFR slope was 2.2 (1.4) and ?5.1 (1.2) mL/min/1.73 m2 in the stable kidney function group and the rapid progression group, respectively. CpG islands in NPHP4, IQSEC1 and TCF3 were hypermethylated to a larger extent in subjects with stable kidney function (P-values of 7.8E?05 to 9.5E?05). These genes are involved in pathways known to promote the epithelial to mesenchymal transition and renal fibrosis. Other CKD-related genes that were differentially methylated are NOS3, NFKBIL2, CLU, NFKBIB, TGFB3 and TGFBI, which are involved in oxidative stress and inflammatory pathways (P-values of 4.5E?03 to 0.046). Pathway analysis using Ingenuity Pathway Analysis showed that gene networks related to cell signaling, carbohydrate metabolism and human behavior are epigenetically regulated in CKD. Conclusions: Epigenetic modifications may be important in determining the rate of loss of kidney function in patients with established CKD.