Title: Disruption of the protein C inhibitor gene results in impaired spermatogenesis and male infertility
Authors: Uhrin, P ×
Dewerchin, Mieke
Hilpert, M
Chrenek, P
Schöfer, C
Zechmeister-Machhart, M
Krönke, G
Vales, A
Carmeliet, Peter
Binder, B R
Geiger, M #
Issue Date: Jan-2001
Series Title: Journal of Clinical Investigation vol:106 issue:12 pages:1531-9
Abstract: Protein C inhibitor (PCI) is a nonspecific, heparin-binding serpin (serine protease inhibitor) that inactivates many plasmatic and extravascular serine proteases by forming stable 1:1 complexes. Proteases inhibited by PCI include the anticoagulant activated protein C, the plasminogen activator urokinase, and the sperm protease acrosin. In humans PCI circulates as a plasma protein but is also present at high concentrations in organs of the male reproductive tract. The biological role of PCI has not been defined so far. However, the colocalization of high concentrations of PCI together with several of its target proteases in the male reproductive tract suggests a role of PCI in reproduction. We generated mice lacking PCI by homologous recombination. Here we show that PCI(-/-) mice are apparently healthy but that males of this genotype are infertile. Infertility was apparently caused by abnormal spermatogenesis due to destruction of the Sertoli cell barrier, perhaps due to unopposed proteolytic activity. The resulting sperm are malformed and are morphologically similar to abnormal sperm seen in some cases of human male infertility. This animal model might therefore be useful for analyzing the molecular bases of these human conditions.
ISSN: 0021-9738
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular and Vascular Biology
Laboratory of Angiogenesis and Vascular Metabolism (Vesalius Research Center) (+)
× corresponding author
# (joint) last author

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