axoneme

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axoneme

[′ak·sə‚nēm]
(cell and molecular biology)
A bundle of fibrils enclosed by a membrane that is continuous with the plasma membrane.
References in periodicals archive ?
These included, for example, vitelline envelope sperm for lysin receptor (VERL), hydroxysteriod dehydrogenase-like protein, gonadotrophl inducible ovarian transcription factor 1 (GIOT1), axonemal protein p66.
Tektins are microtubule-associated cytoskeletal proteins essential for generating complex, long-range patterns of binding sites for axonemal components, such as nexins, radial spokes, and dynein arms (Norrander et al.
The ultrastructural analysis of the cilia with electronmicroscopy revealed ciliated cells appeared to be replaced by columnar cells lacking cilia and basal bodies, and bearing on their surface cilium-like projections without any internal axonemal structure.
Significant positive association has been reported between active smoking and sperm DNA fragmentation (80), as well as axonemal damage (81) and decreased sperm count (82).
An electron microscope study of the axonemal ultrastructure in human spermatozoa from male smokers and nonsmokers.
Loss of some of the peripheral and/or central microtubules was commonly observed, in addition to normal axonemal configurations.
During spermatogenesis normally an indentation of the nucleus is formed in front of the axonemal basis, the so-called implantation fossa.
Axonemal dynein assembly and activity during ciliary/flagellar beating
As mitochondria are the major source of the ATP that helps in the movement of the sperm, the mitochondria produce ATP that diffuses downwards to the axonemal microtubules and their dynein arms.
Thus it seems remarkable, that the linyphiid spider Linyphia triangularis (Clerck, 1757) has an unusual 9 + 0 axonemal pattern (Alberti 1990); unfortunately until now there have been no other ultrastructural observations on Linyphiidae spermatozoa to know assess if this pattern is typical of this taxon.
The proven causes of isolated asthenospermia include artifactual asthenospermia, axonemal defects (immotile cilia syndrome), protein-carboxyl methylase (PCM) deficiency, anti-sperm antibody, necrospermia, and culture-proven infection (19).