Mining key circRNA-associated-ceRNA networks for milk fat metabolism in cows with varying milk fat percentages
文献类型: 外文期刊
作者: Feng, Xiaofang 1 ; Tong, Lijia 1 ; Ma, Lina 2 ; Mu, Tong 3 ; Yu, Baojun 1 ; Ma, Ruoshuang 1 ; Li, Jiwei 1 ; Wang, Chuanchuan 1 ; Zhang, Juan 1 ; Gu, Yaling 1 ;
作者机构: 1.Ningxia Univ, Sch Agr, Key Lab Ruminant Mol & Cellular Breeding, Yinchuan 750021, Peoples R China
2.NingXia Acad Agr & Forestry Sci, Yinchuan 750002, Peoples R China
3.Yanan Univ, Sch Life Sci, Yanan 716000, Peoples R China
关键词: Dairy cows; circRNAs; Milk fat percentage; WGCNA; ceRNAs
期刊名称:BMC GENOMICS ( 影响因子:4.4; 五年影响因子:4.7 )
ISSN: 1471-2164
年卷期: 2024 年 25 卷 1 期
页码:
收录情况: SCI
摘要: Background Cow milk fat is an essential indicator for evaluating and measuring milk quality and cow performance. Growing research has identified the molecular functions of circular RNAs (circRNAs) necessary for mammary gland development and lactation in mammals.Method The present study analyzed circRNA expression profiling data in mammary epithelial cells (MECs) from cows with highly variable milk fat percentage (MFP) using differential expression analysis and weighted gene co-expression network analysis (WGCNA).Results A total of 309 differentially expressed circRNAs (DE-circRNAs) were identified in the high and low MFP groups. WGCNA analysis revealed that the pink module was significantly associated with MFP (r = - 0.85, P = 0.007). Parental genes of circRNAs in this module were enriched mainly in lipid metabolism-related signaling pathways, such as focal adhesion, ECM-receptor interaction, adherens junction and AMPK. Finally, six DE-circRNAs were screened from the pink module: circ_0010571, circ_0007797, circ_0002746, circ_0003052, circ_0004319, and circ_0012840. Among them, circ_0002746, circ_0003052, circ_0004319, and circ_0012840 had circular structures and were highly expressed in mammary tissues. Subcellular localization revealed that these four DE-circRNAs may play a regulatory role in the mammary glands of dairy cows, mainly as competitive endogenous RNAs (ceRNAs). Seven hub target genes (GNB1, GNG2, PLCB1, PLCG1, ATP6V0C, NDUFS4, and PIGH) were obtained by constructing the regulatory network of their ceRNAs and then analyzed by CytoHubba and MCODE plugins in Cytoscape. Functional enrichment analysis revealed that these genes are crucial and most probable ceRNA regulators in milk fat metabolism.Conclusions Our study identified several vital circRNAs and ceRNAs affecting milk fat synthesis, providing new research ideas and a theoretical basis for cow lactation, milk quality, and breed improvement.
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