Subcellular localization of proline-rich tyrosine kinase 2 during oocyte fertilization and early-embryo development in mice

Proline-rich tyrosine kinase 2 (Pyk2), a non-receptor tyrosine kinase, is a member of the focal adhesion kinase family and is highly expressed in oocytes. Using a combination of confocal microscopy and RNAi, we localized and studied the function of both Pyk2 and tyrosine-phosphorylated Pyk2 (p-Pyk2)...

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Published in:Journal of Reproduction and Development 2016, Vol.62(4), pp.351-358
Main Authors: MENG, Xiao-qian, DAI, Yuan-yuan, JING, Lai-dong, BAI, Jing, LIU, Shu-zhen, ZHENG, Ke-gang, PAN, Jie
Format: Article
Language:English
Subjects:
Early-embryo development
Fertilization
Mouse oocyte
Original
Pyk2
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cited_by cdi_FETCH-LOGICAL-c650t-b7d6cae22ab1f10842f753b82f3c4320a9da25646b146cdc88e2b6b8916cd9c53
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container_issue 4
container_start_page 351
container_title Journal of Reproduction and Development
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creator MENG, Xiao-qian
DAI, Yuan-yuan
JING, Lai-dong
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LIU, Shu-zhen
ZHENG, Ke-gang
PAN, Jie
description Proline-rich tyrosine kinase 2 (Pyk2), a non-receptor tyrosine kinase, is a member of the focal adhesion kinase family and is highly expressed in oocytes. Using a combination of confocal microscopy and RNAi, we localized and studied the function of both Pyk2 and tyrosine-phosphorylated Pyk2 (p-Pyk2) during mouse oocyte fertilization and early embryo development. At the onset of fertilization, Pyk2 and p-Pyk2 were detected predominantly in sperm heads and the oocyte cytoplasm. Upon formation of male and female pronuclei, Pyk2 and its activated form leave the cytoplasm and accumulate in the two pronuclei. We detected Pyk2 in blastomere nuclei and found both Pyk2 and p-Pyk2 in the pre-blastula cytoplasm. Pyk2 and its activated form then disappeared from the blastula nuclei and localized to the perinuclear regions, where blastula cells come into contact with each other. Pyk2 knockdown via microinjection of siRNA into the zygote did not inhibit early embryo development. Our results suggest that Pyk2 plays multiple functional roles in mouse oocyte fertilization as well as throughout early embryo development.
doi_str_mv 10.1262/jrd.2016-015
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subjects Early-embryo development
Fertilization
Mouse oocyte
Original
Pyk2
title Subcellular localization of proline-rich tyrosine kinase 2 during oocyte fertilization and early-embryo development in mice
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