Luteinizing hormone beta gene polymorphism and its effect on semen quality traits and luteinizing hormone concentrations in Murrah buffalo bulls

Abstract

ObjectivePresent investigation was aimed to study the Single Nucleotide Variants of the luteinizing hormone beta (LHβ) gene and to analyze their association with the semen quality (fresh and post-thawed frozen semen) and luteinizing hormone (LH) concentrations in Murrah buffalo bulls.MethodsPolymerase chain reaction–single stranded conformational polymorphism (PCR–SSCP) and Sanger sequencing method is used to study genetic variability in LHβ gene. LH assay was carried out using enzyme-linked immunosorbent assay method. A fixed general linear model was used to analyze association of single nucleotide polymorphism (SNP) of LHβ gene with semen quality in 109 and LH concentrations in 80 Murrah bulls.ResultsLHβ gene was found to be polymorphic. Total six SNPs were identified in LHβ gene g C356090A, g C356113T, g A356701G, g G355869A, g G356330C, and g G356606T. Single Stranded Conformational Polymorphism variants of pattern 2 of exon 1+pattern 2 of exon 2+pattern 1 of exon 3 had highly significant (p<0.01) effect on sperm concentration (million/mL), percent mass motility, acrosome integrity and membrane integrity in fresh and frozen semen whereas significant (p<0.05) effect was observed on percent live spermatozoa. SSCP variants of pattern 2 of exon 1+pattern 2 of exon 2+pattern 1 of exon 3 had highly significant (p<0.01) effect on luteinizing hormone concentrations too.ConclusionThe observed association between SSCP variants of LHβ gene with semen quality parameters and LH concentrations indicated the possibilities of using LHβ as a candidate gene for identification of markers for semen quality traits and LH concentrations in Murrah buffaloes.

Exome sequencing identifies variants associated with semen quality in Holstein Friesian and Hallikar bulls

“…The primary regulator of mammalian reproductive function in both males and female is GnRH Biological Signalling Pathway and it acts via G-protein coupled receptors to stimulate synthesis and secretion of two gonadotropin hormones like luteinizing hormone and follicle-stimulating hormone (41) . Luteinizing hormone beta polypeptide ( LHβ ) gene is a single copy gene and it has been indicated that a mutation in the coding region of the gene could lead to its in activation and consequent impaired production of leydig cells (42) and leading to infertility in human. It also observed that the mutation would lead to susceptibly to prostate cancer via altered testosterone secretion.…”

Genes predisposing to syndromic and nonsyndromic infertility: a narrative review

“…Alters the function of the HESX1 protein and represses the activity of other genes, disrupting the formation and early development of the The SNP named G1052A has been reported [44]. Six other SNPs were also identified and are gC356090A, gC356113T, gA356701G, gG355869A, gG356330C, and gG356606T [45].…”