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KMID : 1023620130370040169
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Reproductive and Developmental Biology
2013 Volume.37 No. 4 p.169 ~ p.174
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Effect of Arp2/3 Complex on Sperm Motility and Membrane Structure in Bovine
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Lee June-Sub
Park Yoo-Jin
Kim Jin
Rahman Md. Saidur
Kwon Woo-Sung
Yoon Sung-Jae
You Young-Ah
Pang Myung-Geol
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Abstract
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Sperm capacitation refers to polymerization of filamentous (F)-actin from globular (G)-actin. While the role of actin-related protein 2/3 (Arp2/3) complex in actin polymerization is well appreciated, the underlying mechanism(s) and its relationship with capacitation are poorly understood. Therefore, to evaluate the potential role of Arp2/3 complex on capacitation, bovine spermatozoa were incubated with multiple doses (1, 10 and 100㎛) of CK-636, an inhibitor of Arp2/3 complex with heparin. The cellular localization of the Arp2/3 complex in spermatozoa was identified by immunohistochemistry, whereas western blot was also applied to detect the protein tyrosine phosphorylation of sperm proteins. Additionally, sperm motility and kinematic parameters were evaluated using a computer-assisted sperm analysis system. CK-636 resulted in significant changes in the ratio of Arp2/3 complex localization between acrosome and equatorial region of the spermatozoa. Short-term exposure of spermatozoa to 100㎛ of CK-636 significantly decreased sperm motility, however a non-detectable effect on protein tyrosine phosphorylation was observed during capacitation. On the basis of these results, we propose that Arp2/3 complex is associated with morphological changes during capacitation and compromised sperm motility.
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KEYWORD
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Arp2/3 complex, CK-636, Sperm capacitation, Actin polymerization, Bovine spermatozoa
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