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- W2001145498 abstract "Fertilization in animals is a complex sequence of several biochemical events beginning with the insemination into the female reproductive tract and, finally, leading to embryogenesis. Studies by Kitajima and co-workers (Miyata, S., Sato, C., and Kitajima, K. (2007) Trends Glycosci. Glyc, 19, 85-98) demonstrated the presence of polysialic acid (polySia) on sea urchin sperm. Based on these results, we became interested in the potential involvement of sialic acid polymers in mammalian fertilization. Therefore, we isolated human sperm and performed analyses, including Western blotting and mild 1,2-diamino-4,5-methylenedioxybenzene-HPLC, that revealed the presence α2,8-linked polySia chains. Further analysis by a glyco-proteomics approach led to the identification of two polySia carriers. Interestingly, besides the neural cell adhesion molecule, the polysialyltransferase ST8SiaII has also been found to be a target for polysialylation. Further analysis of testis and epididymis tissue sections demonstrated that only epithelial cells of the caput were polySia-positive. During the epididymal transit, polySia carriers were partially integrated into the sperm membrane of the postacrosomal region. Because polySia is known to counteract histone as well as neutrophil extracellular trap-mediated cytotoxicity against host cells, which plays a role after insemination, we propose that polySia in semen represents a cytoprotective element to increase the number of vital sperm." @default.
- W2001145498 created "2016-06-24" @default.
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- W2001145498 date "2013-06-01" @default.
- W2001145498 modified "2023-10-18" @default.
- W2001145498 title "Polysialic Acid Is Present in Mammalian Semen as a Post-translational Modification of the Neural Cell Adhesion Molecule NCAM and the Polysialyltransferase ST8SiaII" @default.
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- W2001145498 doi "https://doi.org/10.1074/jbc.m113.451112" @default.
- W2001145498 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3696658" @default.
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- W2001145498 hasPublicationYear "2013" @default.
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