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- W1985353208 abstract "<h2>Abstract</h2> Objective: To investigate the effects of the phosphodiesterase inhibitor pentoxifylline on hyperactivated motility and acrosome reaction in human sperm and to determine whether its stimulatory effects occur via increased intracellular calcium levels. Design: Prospective study. Setting: Academic tertiary care facility. Participant(s): Healthy male donors. Intervention(s): The effects of pentoxifylline on hyperactivated motility, acrosome reaction, and intracellular calcium were studied and compared with the effects of progesterone. Thapsigargin, a known mobilizer of intracellular calcium, also was used as positive control. Main Outcome Measure(s): Hyperactivated motility was assessed by computer-assisted sperm motion analysis using the HTM-IVOS, acrosome reaction was evaluated with the fluorescent probe fluorescein isothiocyanate-labeled Pisum sativum agglutinin, and intracellular calcium was determined by fura-2 using spectrofluorometry. Result(s): Pentoxifylline significantly increased both hyperactivated motility and acrosome reaction. Enhancement of hyperactivated motility by pentoxifylline in the capacitation medium persisted for up to 5 hours after pentoxifylline was washed from the medium. It also enhanced the percentage of acrosome-reacted spermatozoa after 4 hours of incubation. These effects occurred in the presence of a marginally significant decrease in intracellular calcium. Conclusion(s): Pentoxifylline stimulates hyperactivated motility and acrosome reaction in spermatozoa from fertile men. Its stimulatory effects occur through mechanism(s) other than increase in intracellular calcium." @default.
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- W1985353208 date "1998-04-01" @default.
- W1985353208 modified "2023-10-13" @default.
- W1985353208 title "Increase of Intracellular Calcium Is Not a Cause of Pentoxifylline-Induced Hyperactivated Motility or Acrosome Reaction in Human Sperm" @default.
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- W1985353208 doi "https://doi.org/10.1016/s0015-0282(98)00013-2" @default.
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