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- W2183698489 abstract "Summary It is well known that outer dense fibers (ODF) of mammalian spermatozoa are associated with axonemal doublets, but the mechanisms and molecules responsible for this interaction have not been identified yet. We studied naturally degenerating human necrozoospermic spermatozoa in order to find out whether the ODF-microtubule association in these cells is preserved. Electron microscopy revealed consistent binding of ODF to the corresponding microtubules. In some cells ODF had ruptured and the bulk of their material had moved to the periphery. Nevertheless, a small part of it had remained connected to the doublet. Immunogold microscopy for alpha-tubulin showed that, when microtubules of degenerating spermatozoa were absent, gold granules were observed occupying their place, at the inner surface of ODF. This finding suggested that even after complete disintegration of microtubules some of their alpha-tubulin remained attached to the corresponding ODF. To our knowledge, this study has demonstrated for the first time that attachment of ODF to microtubules is more permanent and stable than bonds between components within any of these two cytoskeletal structures, and alpha-tubulin is involved in this attachment. It could be concluded that reliable association between ODF and axonemal doublets is of vital importance for sperm function.Key words: axoneme, immunoelectron microscopy, spermatozoa, tubulin, ultrastructure" @default.
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- W2183698489 date "2011-01-01" @default.
- W2183698489 modified "2023-09-26" @default.
- W2183698489 title "OBSERVATIONS OF INTERFACE BETWEEN TAIL MICROTUBULES AND OUTER DENSE FIBERS IN HUMAN NECROZOOSPERMIC SPERMATOZOA" @default.
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