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dc.contributor.authorYu, C-Y
dc.contributor.authorMayba, O
dc.contributor.authorLee, JV
dc.contributor.authorTran, J
dc.contributor.authorHarris, C
dc.contributor.authorSpeed, TP
dc.contributor.authorWang, J-C
dc.date.accessioned2021-02-04T01:36:11Z
dc.date.available2021-02-04T01:36:11Z
dc.date.issued2010-12-20
dc.identifier.citationYu, C. -Y., Mayba, O., Lee, J. V., Tran, J., Harris, C., Speed, T. P. & Wang, J. -C. (2010). Genome-Wide Analysis of Glucocorticoid Receptor Binding Regions in Adipocytes Reveal Gene Network Involved in Triglyceride Homeostasis. PLOS ONE, 5 (12), https://doi.org/10.1371/journal.pone.0015188.
dc.identifier.issn1932-6203
dc.identifier.urihttp://hdl.handle.net/11343/259416
dc.description.abstractGlucocorticoids play important roles in the regulation of distinct aspects of adipocyte biology. Excess glucocorticoids in adipocytes are associated with metabolic disorders, including central obesity, insulin resistance and dyslipidemia. To understand the mechanisms underlying the glucocorticoid action in adipocytes, we used chromatin immunoprecipitation sequencing to isolate genome-wide glucocorticoid receptor (GR) binding regions (GBRs) in 3T3-L1 adipocytes. Furthermore, gene expression analyses were used to identify genes that were regulated by glucocorticoids. Overall, 274 glucocorticoid-regulated genes contain or locate nearby GBR. We found that many GBRs were located in or nearby genes involved in triglyceride (TG) synthesis (Scd-1, 2, 3, GPAT3, GPAT4, Agpat2, Lpin1), lipolysis (Lipe, Mgll), lipid transport (Cd36, Lrp-1, Vldlr, Slc27a2) and storage (S3-12). Gene expression analysis showed that except for Scd-3, the other 13 genes were induced in mouse inguinal fat upon 4-day glucocorticoid treatment. Reporter gene assays showed that except Agpat2, the other 12 glucocorticoid-regulated genes contain at least one GBR that can mediate hormone response. In agreement with the fact that glucocorticoids activated genes in both TG biosynthetic and lipolytic pathways, we confirmed that 4-day glucocorticoid treatment increased TG synthesis and lipolysis concomitantly in inguinal fat. Notably, we found that 9 of these 12 genes were induced in transgenic mice that have constant elevated plasma glucocorticoid levels. These results suggested that a similar mechanism was used to regulate TG homeostasis during chronic glucocorticoid treatment. In summary, our studies have identified molecular components in a glucocorticoid-controlled gene network involved in the regulation of TG homeostasis in adipocytes. Understanding the regulation of this gene network should provide important insight for future therapeutic developments for metabolic diseases.
dc.languageEnglish
dc.publisherPUBLIC LIBRARY SCIENCE
dc.rights.urihttps://creativecommons.org/licenses/by/4.0
dc.titleGenome-Wide Analysis of Glucocorticoid Receptor Binding Regions in Adipocytes Reveal Gene Network Involved in Triglyceride Homeostasis
dc.typeJournal Article
dc.identifier.doi10.1371/journal.pone.0015188
melbourne.affiliation.departmentSchool of Mathematics and Statistics
melbourne.affiliation.facultyScience
melbourne.source.titlePLoS One
melbourne.source.volume5
melbourne.source.issue12
dc.rights.licenseCC BY
melbourne.elementsid1212121
melbourne.contributor.authorSpeed, Terence
dc.identifier.eissn1932-6203
melbourne.accessrightsOpen Access


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