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Connexin40 regulates platelet function

Vaiyapuri, S., Moraes, L. A., Sage, T., Ali, M. S., Lewis, K. R., Mayhaut-Smith, M. P., Oviedo-Orta, E., Simon, A. M. and Gibbins, J. M. (2013) Connexin40 regulates platelet function. Nature Communications, 4. pp. 2564-2572. ISSN 2041-1723

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To link to this item DOI: 10.1038/ncomms3564

Abstract/Summary

The presence of multiple connexins was recently demonstrated in platelets, with notable expression of Cx37. Studies with Cx37-deficient mice and connexin inhibitors established roles for hemichannels and gap junctions in platelet function. It was uncertain, however, whether Cx37 functions alone or in collaboration with other family members through heteromeric interactions in regulation of platelet function. Here we report the presence and functions of an additional platelet connexin, Cx40. Inhibition of Cx40 in human platelets or its deletion in mice reduces platelet aggregation, fibrinogen binding, granule secretion and clot retraction. The effects of the Cx37 inhibitor 37,43Gap27 on Cx40-/- mouse platelets and of the Cx40 inhibitor 40Gap27 on Cx37-/- mouse platelets revealed that each connexin is able to function independently. Inhibition or deletion of Cx40 reduces haemostatic responses in mice, indicating the physiological importance of this protein in platelets. We conclude that multiple connexins are involved in regulating platelet function, thereby contributing to haemostasis and thrombosis.

Item Type:Article
Refereed:Yes
Divisions:Interdisciplinary centres and themes > Institute for Cardiovascular and Metabolic Research (ICMR)
Faculty of Life Sciences > School of Biological Sciences > Biomedical Sciences
ID Code:34248
Uncontrolled Keywords:platelets, haemostasis, thrombosis, connexin, hemichannel, gap junction
Additional Information:The full text of this article is freely available via PMC using the link supplied in Related URLs
Publisher:Nature Publishing Group

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