Novel mutations reduce expression of meiotic regulators SYCE1 and BOLL in testis of azoospermic men from West Bengal, India

Abstract

Abstract Background:We investigated the polymorphisms/mutations in synaptonemal complex central element protein 1 (SYCE1) and CDC25A mRNA binding protein (BOLL) to test whether they increase the risk of azoospermia among Bengali-speaking men from West Bengal, India. Sanger's dideoxy sequencing was used to genotype 140 azoospermic individuals who tested negative for Y chromosome microdeletion and 120 healthy controls. In both cases and controls, qRT-PCR was used to determine the expression summary of SYCE1and BOLL. The perceived harmful consequences of identified mutations were inferred using in silico analysis. Suitable statistical approaches were used to conduct the association study. Results:We found SYCE1 177insT (ON245141), 10650T>G (ON257012), 10093insT (ON257013), 10653insG (ON292504), rs10857748A>G, rs10857749G>A, rs10857750T>A and BOLL 7708T>A (ON245141insT), rs72918816T>C, rs700655C>T variants with the prevalence of azoospermia. Data from qRT-PCR and in silico studies projected that the variations would either disrupt the transcript's natural splice junctions or cause probable damage to the structure of the genes' proteins. Conclusions:SYCE1 gene variants [ 177insT (ON245141), 10650T>G (ON257012), 10093insT (ON257013), 10653insG (ON292504), rs10857748A>G, rs10857749G>A, rs10857750T>A] and BOLL gene variants [7708T>A (ON245141insT), rs72918816T>C, rs700655C>T] reduce the expression of respective gene in testicular tissue among azoospermic male as revealed from qRT-PCR result. These genetic variants could be used as markers for screening male infertility to decide over personalised treatment strategy in regular ART practise.