BDH1 identified by transcriptome has a negative effect on lipid metabolism in mammary epithelial cells of dairy goats

作者：Mengke Ni, Saige Zang, Yihan Wang, Xiaochen Qin, Min Tian, Tiantian Xiong, Chong Chen, Yue Zhang, Jun Luo, Cong Li · 发表于：BMC Genomics · 年份：2025 · DOI：10.1186/s12864-025-11245-1 · 被引用次数：6 · 研究领域：Diet and metabolism studies、Reproductive Physiology in Livestock、Fatty Acid Research and Health

BACKGROUND: The 3-hydroxybutyrate dehydrogenase 1 (BDH1) mainly participates in the regulation of milk fat synthesis and ketone body synthesis in mammary epithelial cells. In our previous study, BDH1 was identified as a key candidate gene regulating lipid metabolism in mammary glands of dairy goats by RNA-seq. This study aimed to investigate the effect of BDH1 on lipid metabolism in mammary epithelial cells of dairy goats (GMECs). RESULTS: The results suggest that BDH1 plays a significant role in reducing triacylglycerol content and lipid droplet accumulation in GMECs (p < 0.05). Overexpression of BDH1 significantly decreased the expression of lipid metabolism-related genes (SREBF1 and GPAM) and reduced the levels of C14:0 and C17:1, while increasing FABP3 expression and C10:0 concentration (p < 0.05). Interference with BDH1 significantly increased the expression of SREBF1 and GPAM and the concentration of C14:0, C15:1, and C20:1, but significantly decreased FABP3 and C18:0 (p < 0.05). Treatment of GMECs with β-hydroxybutyric acid (R-BHBA) significantly decreased the expression of FASN, ACACA, LPL, SREBF1, FABP3, ACSL1, GPAM, DGAT1, and triacylglycerol content, while significantly increasing the expression of BDH1 (p < 0.05). Interference with BDH1 rescued the reduction of cellular TAG content and the expression of FASN, LPL, SREBF1, ACSL1, and GPAM in BHBA-treated GMECs. CONCLUSION: In conclusion, BDH1 negatively regulates lipid metabolism in mammary glands of dairy goats. F...