Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of rat kidney in diabete mellitus during puberty


ABSTRACT: Puberty unmasks or accelerates nephropathies, including the nephropathy of diabetes mellitus (DM). A number of cellular systems implicated in the kidney disease of DM interweave, forming an interdependent functional web. We performed focused microarray analysis to test the hypothesis that one or more genes in the transforming growth factor beta (TGF-β) signaling system would be differentially regulated in male rats depending on the age of onset of DM. Experiment Overall Design: Male rat littermates began the 6-week-protocol at 4 or 14 weeks of age with injection of streptozocin, 65 mg/kg iv, or equal volume of vehicle. 3 days later insulin palmitate or palmitate vehicle pellets were implanted once hyperglycemia was confirmed. Rats received ad lib food and water for 6 weeks and maintained blood glucose levels 350-350 mg/dl in diabetic groups. Kidneys were removed under isoflurane anesthesia. The cortex was rapidly dissected from the medulla and snap-frozen. Cortex was stored at -80 until all rats had completed the protocol. RNA was isolated from renal cortex and the transcriptome analyzed using gene chips with more than 30,000 transcripts. Age-specific effects of DM were demonstrated for 1,760 transcripts. Analysis then focused on 89 genes involved in the TGF-β signaling pathway.

ORGANISM(S): Rattus norvegicus

SUBMITTER: Pascale Hammond Lane 

PROVIDER: E-GEOD-7253 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Prepubertal onset of diabetes prevents expression of renal cortical connective tissue growth factor.

Langer William J WJ   Devish Kay K   Carmines Pamela K PK   Lane Pascale H PH  

Pediatric nephrology (Berlin, Germany) 20071121 2


Puberty unmasks or accelerates the nephropathy of diabetes mellitus (DM). We performed focused microarray analysis to test the hypothesis that one or more genes in the transforming growth factor beta (TGF-beta) signaling system would be differentially regulated in male rats depending on their age at onset of DM. Littermates were started on the 6-week protocol at 4 weeks or 14 weeks of age. Renal cortical RNA was isolated and analyzed using gene chips with more than 30,000 transcripts. Age-specif  ...[more]

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