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- W1993291225 abstract "Though the spermatozoa are known to produce superoxide anion radicals, the enzyme system(s) that produce superoxide in these cells are not yet identified. Using Western blot assays and confocal laser scan microscopy, we detected gp91(phox) and p67(phox) associated with spermatozoa from testis and epididymis. We could not detect p22(phox) in any of the sperm samples analyzed. While the expression of gp91(phox) p67(phox) appeared to be constitutive, p47(phox) was detectable only in spermatozoa from testis and vas deferens. Importantly, p40(phox) could be seen in very high quantities in testicular spermatozoa, which also showed the highest levels of NADPH-oxidase activity. Spermatozoa from cauda epididymidis and vas deferens also showed the presence of p40(phox), though the amount was low when compared with that of testicular spermatozoa. The absence of p22(phox) and the striking correlation between the presence of p40(phox) and the NADPH-oxidase activity suggest that the NADPH oxidase associated with spermatozoa is p22(phox)-independent and that its activity is positively modulated by p40(phox). Further, since the confocal imaging detected that the subunits of the NADPH oxidase are located significantly on the head domains, the spermatozoa appear to present a case with dominant non-mitochondrial superoxide anion producing capabilities." @default.
- W1993291225 created "2016-06-24" @default.
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- W1993291225 date "2005-06-01" @default.
- W1993291225 modified "2023-09-23" @default.
- W1993291225 title "Identification of non-mitochondrial NADPH oxidase and the spatio-temporal organization of its components in mouse spermatozoa" @default.
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- W1993291225 doi "https://doi.org/10.1016/j.bbrc.2005.03.198" @default.
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