Knockdown of adiponectin promotes the adipogenesis of goat intramuscular preadipocytes
ANIMAL BIOTECHNOLOGY
Authors: Xie, Guangjie; Wang, Yong; Xu, Qing; Hu, Meng; Zhu, Jiangjiang; Bai, Wenlin; Lin, Yaqiu
Abstract
Intramuscular fat (IMF) content determined by the intramuscular preadipocytes differentiation has a huge influence on the sensory quality traits of meats. It was reported that the adiponectin (ADIPOQ) gene could promote adipocytes differentiation, but the underlying molecular and functional characterization of theADIPOQfor regulating goat IMF deposition remained unknown. Herein, the knockdown ofADIPOQwas mediated by siRNAs during goat intramuscular preadipocytes differentiation. Also, the qRT-PCR technique was performed to detect the mRNA levels of target genes in multiply experiment groups. These results showed that theADIPOQwas expressed more than similar to 400 folds in subcutaneous adipose tissue compared to that of heart tissue, and the mRNA level ofADIPOQreached a peak at Hour 60 during the differentiation process, while at Hour 36 didADIPOR1 andADIPOR2. Moreover, the knockdown ofADIPOQpromoted the intramuscular preadipocytes differentiation and accelerated the lipid accumulation in the mature adipocytes with down-regulating theADIPOR1 and preadipocyte factor 1 (Pref-1) mRNA levels and up-regulating the mRNA expression levels of the CAAT/enhancer-binding proteins (C/EBPs) and transcription factor peroxisomal proliferator-activated receptor gamma (PPAR gamma), etc. Our study will provide a new opposite insight that the inhibition ofADIPOQexpression during intramuscular preadipocytes differentiation promotes goat IMF deposition.
RNA sequencing and differential expression reveals the effects of serial oestrus synchronisation on ovarian genes in dairy goats
REPRODUCTION FERTILITY AND DEVELOPMENT
Authors: Sun, Shuang; Li, Cong; Liu, Shimin; Luo, Jun; Chen, Zhi; Zhang, Changhui; Zhang, Tianying; Huang, Jiangtao; Xi, Limeng
Abstract
A total of 24 female Xinong Saanen dairy goats were used to examine differentially expressed genes (DEGs) in the ovaries of goats treated once or three times for oestrus synchronisation (ES). The goats were randomly divided into two groups: one group received three ES treatments at fortnightly intervals (repeated or triple ES group), whereas the other was only treated once on the same day as the third ES treatment for the triple group (control group) during the breeding season. Ovaries of three goats in oestrus from each group were collected for morphological examination and transcriptome sequencing, while the rest of the goats were artificially inseminated twice. Litter size and fecundity rate tended (P = 0.06) to be lower in the triple ES group. A total of 319 DEGs were identified, including carbohydrate sulphotransferase 8 (CHST8), corticosteroid-binding globulin (CBG), oestradiol 17-beta-dehydrogenase 1 (DHBI), oestrogen receptor 1 (ESR1), progestin and adipoQ receptor family member 4 (PAQR4), PAQR9, prostacyclin synthase (PTGIS), contactin-associated protein (CNTNAP4), matrix metalloproteinase-2 (MMP-2), regulator of G-protein signalling 9-2 (RGS9-2) and sperm surface protein Sp17 (Sp17); these were the most promising novel candidate genes for reproductive performances in goats. Our study indicates that triple ES could cause DNA damage and alter gene expression in goat ovaries, potentially affecting ovary function, neural regulation and hormone secretion.