Structure‑based redesigning of pentoxifylline analogs against selective phosphodiesterases to modulate sperm functional competence for assisted reproductive technologies

Kumari, Sandhya and Adiga, Satish Kumar and Hegde, Padmaraj and Kalthur, Guruprasad (2021) Structure‑based redesigning of pentoxifylline analogs against selective phosphodiesterases to modulate sperm functional competence for assisted reproductive technologies. Scientific Reports, 11 (1). pp. 1-7. ISSN 2045-2322

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Abstract

Phosphodiesterase (PDE) inhibitors, such as pentoxifylline (PTX), are used as pharmacological agents to enhance sperm motility in assisted reproductive technology (ART), mainly to aid the selection of viable sperm in asthenozoospermic ejaculates and testicular spermatozoa, prior to intracytoplasmic sperm injection (ICSI). However, PTX is reported to induce premature acrosome reaction (AR) and,exert toxic efects on oocyte function and early embryo development. Additionally, in vitro binding studies as well as computational binding free energy (ΔGbind) suggest that PTX exhibits weak binding to sperm PDEs, indicating room for improvement. Aiming to reduce the adverse efects and to enhance the sperm motility, we designed and studied PTX analogues. Using structure-guided in silico approach and by considering the physico-chemical properties of the binding pocket of the PDEs,designed analogues of PTX. In silico assessments indicated that PTX analogues bind more tightly to PDEs and form stable complexes. Particularly, ex vivo evaluation of sperm treated with one of the PTX analogues (PTXm-1), showed comparable benefcial efect at much lower concentration—slower AR, higher DNA integrity and extended longevity of spermatozoa and superior embryo quality. PTXm-1 is proposed to be a better pharmacological agent for ART than PTX for sperm function enhancement

Item Type: Article
Subjects: Medicine > KMC Manipal > Clinical Embryology
Medicine > KMC Manipal > Urology
Depositing User: KMC Library
Date Deposited: 01 Feb 2022 08:54
Last Modified: 01 Feb 2022 08:54
URI: http://eprints.manipal.edu/id/eprint/158222

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