Background:inflammasome protein govern the inflammatory process. The elevation of NLRP3 inflammasome might be related to bad seminal fluid analysis results. Objectives:This study aimed to evaluate seminal plasma NLRP3 protein and its relation with seminal fluid analysis parameters before and after in vitro sperm activation. Patients and Methods: a total of 50 infertile patients were collected form higher institute of infertility diagnosis and assisted reproductive technique, there semen samples were processed for seminal fluid analysis before and after in vitro sperm activation. NLRP3 inflammasome protein were measured in seminal plasma. Results:the mean level of NLRP3 protein was 5.12 ng/ml. the higher level of NLRP3 protein (4.5ng/ml) associated with lower sperm concentration, grade A, B, C and higher level of grade D motility. However, 50% of those patients have an improvement in their seminal fluid analysis after in vitro sperm activation. Conclusion:Elevation of NLRP3 protein in seminal plasma may be associated with the increased leukocytospermia, bad sperm quality and unresponsiveness to in vitro sperm activation among infertile male.

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