Phosphatidylserine Levels in Seminal Plasma of Iraqi Infertile Men Using Direct and Indirect Swim Up Sperm Preparation Techniques

Abstract

Phosphatidylserine (PS), exposed on viable sperm, is required for fertilization as it is recognized by specific receptors located on the microvilli of the oocyte to promote sperm: egg fusion. The heads of viable and motile sperm exhibit PS. With (PS) exposure progressively increasing during sperm transit through the epididymis. PS asymmetry on the leaflets of plasma membrane is arranged in a complex way, via multiple proteins functioning in opposite directions; further, PS is also essential for many intracellular trafficking events. The aim of this study was to evaluate the phosphatidylserine PS level in seminal plasma of infertile men before and after activation using Direct Swim Up (DSU) and Indirect Swim Up (IDSU) activation method and make a comparison between them. Forty infertile men were included in this study during their attendance to the infertility clinic at High Institute for Infertility Diagnosis and Assisted Reproductive Technologies, Al-Nahrain University. Normozoospermic or mild asthenozoospermic semen samples were used to choose the cases, according to WHO manual standards (1999 -2010). The collected semen samples obtained were divided into three parts: The first part prepared was as an in vitro sperm characterization before activation while the second and third parts were after activation using direct and indirect swim up techniques respectively. The level of seminal plasma phosphatidylserine was increased after the activation techniques from the baseline level before activation. Comparison of Seminal plasma phosphatidylserine levels between direct and indirect sperm activation technique were significantly higher in direct swim up activation technique than indirect one. Phosphatidylserine (PS) in semen plasma of infertile men was significantly increased after activation using Direct Swim Up DSU preparation method.