title: Progesterone does not potentiate the acrosome reaction in human spermatozoa: flow cytometric analysis using CD46 antibody.
abstract: The study was designed in order to investigate the action of progesterone on the spontaneous and ionophore-induced human spermatozoa acrosome reaction in vitro. The principle of the assay system is flow cytometric analysis of CD46 antibody binding to the inner acrosomal membrane. The technique is a simple and objective method of analysis, allowing fluorescent analysis of a large segment (5000 spermatozoa) of the spermatozoa population under investigation, with concomitant isolation of the live fraction of the spermatozoa population. Four concentrations of progesterone (1, 25, 50, and 100 microg/ml) were examined for their effects on spermatozoa capacitated for 4 and 24 h. In addition, motility parameters were examined by the CellSoft 2000 automated semen analyser system. Analysis of variance revealed that progesterone had no effect on either the spontaneous acrosome reaction or the ionophore-induced acrosome reaction at both 4 h and 24 h of spermatozoa capacitation times. Further, no effects on sperm motility parameters or on spermatozoa viability could be attributed to progesterone. We therefore conclude that progesterone has no objectively measurable effects on either the sperm acrosome reaction or sperm motility parameters, as measured in normal sperm populations.
authors.affiliation: IVF Laboratory, Department of Pathology and Laboratory Medicine, King Faisal Specialist Hospital and Research Centre, PO Box 3354, Riyadh 11211, Saudi Arabia.
authors.forename: J A
authors.initials: JA
authors.lastname: Carver-Ward
authors.forename: J M
authors.initials: JM
authors.lastname: Hollanders
authors.forename: K A
authors.initials: KA
authors.lastname: Jaroudi
authors.forename: M
authors.initials: M
authors.lastname: Einspenner
authors.forename: S T
authors.initials: ST
authors.lastname: Al-Sedairy
authors.forename: K V
authors.initials: KV
authors.lastname: Sheth
mesh_terms: D000177:Acrosome / Q000187:drug effects* / Q000502:physiology*; D000906:Antibodies; D015703:Antigens, CD / Q000276:immunology; D000001:Calcimycin / Q000494:pharmacology; D002470:Cell Survival / Q000187:drug effects; D005434:Flow Cytometry; D006801:Humans; D008297:Male; D051916:Membrane Cofactor Protein; D008562:Membrane Glycoproteins / Q000276:immunology; D015999:Multivariate Analysis; D011374:Progesterone / Q000008:administration & dosage / Q000494:pharmacology*; D013081:Sperm Motility / Q000187:drug effects
chemical_list: D000906:Antibodies; D015703:Antigens, CD; C497857:CD46 protein, human; D051916:Membrane Cofactor Protein; D008562:Membrane Glycoproteins; D000001:Calcimycin; D011374:Progesterone