Knockdown of LXRα Inhibits Goat Intramuscular Preadipocyte Differentiation
Goat intramuscular fat (IMF) content is mainly determined by the processes of intramuscular preadipocytes adipogenic differentiation and mature adipocyte lipid accumulation. However, the underlying regulators of these biological processes remain largely unknown. Here, we report that the expression o...
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doaj-fc6e6a4ae9fa428c9bba85ed5a4b3b1d2020-11-24T21:18:00ZengMDPI AGInternational Journal of Molecular Sciences1422-00672018-10-011910303710.3390/ijms19103037ijms19103037Knockdown of LXRα Inhibits Goat Intramuscular Preadipocyte DifferentiationYan Xiong0Qing Xu1Sen Lin2Yong Wang3Yaqiu Lin4Jiangjiang Zhu5College of Life Science and Technology, Southwest Minzu University, Chengdu 610041, ChinaCollege of Life Science and Technology, Southwest Minzu University, Chengdu 610041, ChinaCollege of Life Science and Technology, Southwest Minzu University, Chengdu 610041, ChinaCollege of Life Science and Technology, Southwest Minzu University, Chengdu 610041, ChinaCollege of Life Science and Technology, Southwest Minzu University, Chengdu 610041, ChinaCollege of Life Science and Technology, Southwest Minzu University, Chengdu 610041, ChinaGoat intramuscular fat (IMF) content is mainly determined by the processes of intramuscular preadipocytes adipogenic differentiation and mature adipocyte lipid accumulation. However, the underlying regulators of these biological processes remain largely unknown. Here, we report that the expression of Liver X receptor alpha (LXRα) reaches a peak at early stage and then gradually decreases during goat intramuscular adipogenesis. Knockdown of LXRα mediated by two independent siRNAs significantly inhibits intramuscular adipocytes lipid accumulation and upregulates preadipocytes marker- preadipocyte factor 1 (pref1) expression. Consistently, siRNA treatments robustly decrease mRNA level of adipogenic related genes, including CCAAT enhancer binding protein alpha (Cebpα), Peroxisome proliferator activated receptor gamma (Pparg), Sterol regulatory element binding protein isoform 1c (Srebp1c), Fatty acids binding protein (aP2) and Lipoprotein lipase (Lpl). Next, adenovirus overexpression of LXRα does not affect intramuscular adipocytes adipogenesis manifested by Oil Red O signal measurement and adipogenic specific genes detection. Mechanically, we found that both CCAAT enhancer binding protein beta (Cebpβ) and Kruppel like factor 8 (Klf8) are potential targets of LXRα, indicated by having putative binding sites of LXRα at the promoter of these genes and similar expression pattern during adipogenesis comparing to LXRα. Importantly, mRNA levels of Cebpβ and Klf8 are downregulated significantly in goat LXRα knockdown intramuscular adipocyte. These results demonstrate that loss function of LXRα inhibits intramuscular adipogenesis possibly through down-regulation of Cebpβ and Klf8. Our research will provide new insights into mechanical regulation of goat IMF deposition.http://www.mdpi.com/1422-0067/19/10/3037goatCapra hircusLXRαintramuscular adipocyteintramuscular fat |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yan Xiong Qing Xu Sen Lin Yong Wang Yaqiu Lin Jiangjiang Zhu |
spellingShingle |
Yan Xiong Qing Xu Sen Lin Yong Wang Yaqiu Lin Jiangjiang Zhu Knockdown of LXRα Inhibits Goat Intramuscular Preadipocyte Differentiation International Journal of Molecular Sciences goat Capra hircus LXRα intramuscular adipocyte intramuscular fat |
author_facet |
Yan Xiong Qing Xu Sen Lin Yong Wang Yaqiu Lin Jiangjiang Zhu |
author_sort |
Yan Xiong |
title |
Knockdown of LXRα Inhibits Goat Intramuscular Preadipocyte Differentiation |
title_short |
Knockdown of LXRα Inhibits Goat Intramuscular Preadipocyte Differentiation |
title_full |
Knockdown of LXRα Inhibits Goat Intramuscular Preadipocyte Differentiation |
title_fullStr |
Knockdown of LXRα Inhibits Goat Intramuscular Preadipocyte Differentiation |
title_full_unstemmed |
Knockdown of LXRα Inhibits Goat Intramuscular Preadipocyte Differentiation |
title_sort |
knockdown of lxrα inhibits goat intramuscular preadipocyte differentiation |
publisher |
MDPI AG |
series |
International Journal of Molecular Sciences |
issn |
1422-0067 |
publishDate |
2018-10-01 |
description |
Goat intramuscular fat (IMF) content is mainly determined by the processes of intramuscular preadipocytes adipogenic differentiation and mature adipocyte lipid accumulation. However, the underlying regulators of these biological processes remain largely unknown. Here, we report that the expression of Liver X receptor alpha (LXRα) reaches a peak at early stage and then gradually decreases during goat intramuscular adipogenesis. Knockdown of LXRα mediated by two independent siRNAs significantly inhibits intramuscular adipocytes lipid accumulation and upregulates preadipocytes marker- preadipocyte factor 1 (pref1) expression. Consistently, siRNA treatments robustly decrease mRNA level of adipogenic related genes, including CCAAT enhancer binding protein alpha (Cebpα), Peroxisome proliferator activated receptor gamma (Pparg), Sterol regulatory element binding protein isoform 1c (Srebp1c), Fatty acids binding protein (aP2) and Lipoprotein lipase (Lpl). Next, adenovirus overexpression of LXRα does not affect intramuscular adipocytes adipogenesis manifested by Oil Red O signal measurement and adipogenic specific genes detection. Mechanically, we found that both CCAAT enhancer binding protein beta (Cebpβ) and Kruppel like factor 8 (Klf8) are potential targets of LXRα, indicated by having putative binding sites of LXRα at the promoter of these genes and similar expression pattern during adipogenesis comparing to LXRα. Importantly, mRNA levels of Cebpβ and Klf8 are downregulated significantly in goat LXRα knockdown intramuscular adipocyte. These results demonstrate that loss function of LXRα inhibits intramuscular adipogenesis possibly through down-regulation of Cebpβ and Klf8. Our research will provide new insights into mechanical regulation of goat IMF deposition. |
topic |
goat Capra hircus LXRα intramuscular adipocyte intramuscular fat |
url |
http://www.mdpi.com/1422-0067/19/10/3037 |
work_keys_str_mv |
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1726010805011349504 |