Rattus norvegicus
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ABSTRACT:
PROVIDER: PRJNA349974 | ENA |
REPOSITORIES: ENA
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Project description:Genome-wide analysis of renal gene expression during hyperoxaluria development
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Project description:We are testing the ability of spironolactone as a NADPH oxidase inhibitor during an induced dietary oxalate overload by Ethylene Glycol in Sprague Dawley rats at two different time points. We looked into the development of hyperoxaluria and crystal deposition at two different time points and into differences between hyperoxaluria and crystal induced alterations in the kidneys. Eventually, we are expecting to see the role of spironolactone as an inhibitor of NADPH oxidase which is involved in the production of reactive oxygen species (ROS) which leads to oxidative stress in the living organisms leading to a plethora of vascular diseases, hypertension, and kidney diseases.
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2016-09-02 | GSE44150 | GEO
Project description:Previous studies have proposed that production of reactive oxygen species (ROS) is an important contributor to renal injury and inflammation following exposure to oxalate or calcium-oxalate crystals. The present study was conducted to determine, utilizing global transcriptome analyses, if the NADPH oxidase system is activated in kidneys of rats fed a diet leading to hyperoxaluria and crystal deposition. HLP was used to induce hyperoxaluria. Hyperoxaluria will lead to crystallization and up regulation of various NADPH oxidase subunits followed by increased expression of different specific genes. It is our hypothesis that crystallization induces inflammation of the kidneys via the activation of renin-angiotensin system (RAS) and production of reactive oxygen species (ROS) through NADPH oxidase complex. Apocynin was used to block hyperoxaluria and production of reactive oxygen species (ROS) with the inhibition of NADPH oxidase system as Apocynin inhibits membrane translocation of p47 subunit of NADPH oxidase. The present study was designed based on NADPH oxidase system and rats were divided into 4 groups (n= 6/group). Group 1 was fed regular rat chow diet, Group 2 received regular rat chow diet supplemented with 5% (Hydroxy-L-Proline) HLP, Group 3 received rat chow diet with 4 mmol Apocynin to drink, and Group 4 received regular rat chow diet with 5% HLP and 4 mmol Apocynin. After 28 days each rat was euthanized, their kidneys freshly explanted and dissected to obtain both cortex and medulla tissues. So the 4 groups were divided into cortex and medulla forming 8 groups. RNA was isolated from all the 8 specimens
2012-12-20 | E-GEOD-36446 | biostudies-arrayexpress
Project description:A series of two color gene expression profiles obtained using Agilent 44K expression microarrays was used to examine sex-dependent and growth hormone-dependent differences in gene expression in rat liver. This series is comprised of pools of RNA prepared from untreated male and female rat liver, hypophysectomized (‘Hypox’) male and female rat liver, and from livers of Hypox male rats treated with either a single injection of growth hormone and then killed 30, 60, or 90 min later, or from livers of Hypox male rats treated with two growth hormone injections spaced 3 or 4 hr apart and killed 30 min after the second injection. The pools were paired to generate the following 6 direct microarray comparisons: 1) untreated male liver vs. untreated female liver; 2) Hypox male liver vs. untreated male liver; 3) Hypox female liver vs. untreated female liver; 4) Hypox male liver vs. Hypox female liver; 5) Hypox male liver + 1 growth hormone injection vs. Hypox male liver; and 6) Hypox male liver + 2 growth hormone injections vs. Hypox male liver. A comparison of untreated male liver and untreated female liver liver gene expression profiles showed that of the genes that showed significant expression differences in at least one of the 6 data sets, 25% were sex-specific. Moreover, sex specificity was lost for 88% of the male-specific genes and 94% of the female-specific genes following hypophysectomy. 25-31% of the sex-specific genes whose expression is altered by hypophysectomy responded to short-term growth hormone treatment in hypox male liver. 18-19% of the sex-specific genes whose expression decreased following hypophysectomy were up-regulated after either one or two growth hormone injections. Finally, growth hormone suppressed 24-36% of the sex-specific genes whose expression was up-regulated following hypophysectomy, indicating that growth hormone acts via both positive and negative regulatory mechanisms to establish and maintain the sex specificity of liver gene expression. For full details, see V. Wauthier and D.J. Waxman, Molecular Endocrinology (2008)
2008-05-24 | GSE11529 | GEO