Bicarbonate and bovine serum albumin reversibly 'switch' capacitation induced events in human spermatozoa

Kweku Bedu-Addo, Linda Lefievre, FL Moseley, Christopher Barratt, Stephen Publicover

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

We have investigated the reversibility of biochemical and physiological changes that occur upon suspension of ejaculated human spermatozoa during in vitro capacitation. Cells were swum up in a simple HEPES-based saline [lacking bicarbonate and bovine serum albumin (BSA)], then resuspended either in supplemented Earle's balanced salt solution (sEBSS) (25 mM bicarbonate) with 0.3% BSA (for in vitro capacitation) or in medium-lacking bicarbonate and/or BSA. Progesterone-induced acrosome reaction (AR) developed during in vitro capacitation (6 h). A progesterone-induced [Ca2+](i) signal was detectable in cells maintained in the simple HEPES-based saline, but upon transfer to sEBSS, the response increased three- to four-fold, saturating within
Original languageEnglish
Pages (from-to)683-691
Number of pages9
JournalMolecular Human Reproduction
Volume11
Issue number9
DOIs
Publication statusPublished - 11 Oct 2005

Keywords

  • calcium
  • sperm
  • capacitation
  • phosphorylation
  • cAMP

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