RESUMO
Under the large-scale breeding model, the performance of the Holstein bull is directly related to the economic efficiency of the whole dairy farm and is the key factor affecting the genetic quality of the herd. Although the number of reported studies on the association of long noncoding RNAs (lncRNAs) with male reproduction is increasing, there is a lack of research on how lncRNAs regulate Holstein bull testicular development and spermatogenesis. To explore the molecular mechanisms between lncRNAs and spermatogenesis, three 8-week-old Holstein bull (young bull, YB) testes and three 80-week-old Holstein bull (adult bull, AB) testes from the same herd were randomly chosen, and transcriptome analysis was performed to find associations between spermatogenesis and transcriptome profiles. About 16,956 differentially expressed lncRNAs (DELs) and 7970 differentially expressed mRNAs (DEMs) were identified, and 3642 significantly relationship pairs were screened out based on co-expression analysis. Further Hub analysis obtained 6 lncRNAs, and 71 mRNAs regulated by them were enriched subsequently. Functional analysis results of differentially expressed Hub LncRNA-mRNA pairs showed that more positive cell cycle checkpoints, spindle assembly and the sister chromatids separation in AB testes indicated higher production rates of sperm in AB as compared to YB. This study reveals physiological changes and further broaden our understanding of lncRNA regulation of spermatogenesis in the fully mature testis according to the transcriptome profiles.
Assuntos
RNA Longo não Codificante , Testículo , Masculino , Bovinos/genética , Animais , Testículo/metabolismo , RNA Longo não Codificante/genética , RNA Longo não Codificante/metabolismo , Sêmen/metabolismo , Espermatogênese/genética , Perfilação da Expressão Gênica/veterinária , Transcriptoma , RNA Mensageiro/metabolismoRESUMO
Spermatogenesis is a complex differentiating developmental process in which undifferentiated spermatogonial germ cells differentiate into spermatocytes, spermatids, and finally, to mature spermatozoa. This multistage developmental process of spermatogenesis involves the expression of many male germ cell-specific long noncoding RNAs (lncRNAs) and highly regulated and specific gene expression. LncRNAs are a recently discovered large class of noncoding cellular transcripts that are still relatively unexplored. Only a few of them have post-meiotic; however, lncRNAs are involved in many cellular biological processes. The expression of lncRNAs is biologically relevant in the highly dynamic and complex program of spermatogenesis and has become a research focus in recent genome studies. This review considers the important roles and novel regulatory functions whereby lncRNAs modulate mammalian spermatogenesis.
