Journal ArticleDOI
Lipid changes of goat sperm plasma membrane during epididymal maturation
TLDR
The altered lipid profile of the mature sperm membrane leads to changes in its fluidity that play an important role in determining the structure and functions of the biomembrane.About:
This article is published in Biochimica et Biophysica Acta.The article was published on 1991-01-30. It has received 76 citations till now. The article focuses on the topics: Sperm plasma membrane & Membrane lipids.read more
Citations
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Journal ArticleDOI
Targeted disruption of hormone-sensitive lipase results in male sterility and adipocyte hypertrophy, but not in obesity
Jun-ichi Osuga,Shun Ishibashi,Teruaki Oka,Hiroaki Yagyu,Ryu-ichi Tozawa,Akihisa Fujimoto,Futoshi Shionoiri,Naoya Yahagi,Frederic B. Kraemer,Osamu Tsutsumi,Nobuhiro Yamada +10 more
TL;DR: It is shown that HSL is required for spermatogenesis but is not the only enzyme that mediates the hydrolysis of triacylglycerol stored in adipocytes, and that adipocytes were significantly enlarged and the size differences between cell and tissue suggests the heterogeneity of adipocytes.
Journal ArticleDOI
Bicarbonate stimulated phospholipid scrambling induces cholesterol redistribution and enables cholesterol depletion in the sperm plasma membrane
Frits M. Flesch,Jos F. Brouwers,Patricia F. E. M. Nievelstein,Arie J. Verkleij,Lambert M.G. van Golde,Ben Colenbrander,Barend M. Gadella +6 more
TL;DR: A model is proposed in which phospholipid scrambling induces the formation of an apical membrane raft in the sperm head surface that enables albumin mediated efflux of cholesterol.
Journal ArticleDOI
A porcine homolog of the major secretory protein of human epididymis, HE1, specifically binds cholesterol.
Naomichi Okamura,Sachiko Kiuchi,Michiko Tamba,Takayuki Kashima,Shinsuke Hiramoto,Tadashi Baba,Françoise Dacheux,Jean-Louis Dacheux,Yoshiki Sugita,Yin-Zhe Jin +9 more
TL;DR: It was found that the He1 homolog is a major cholesterol-binding protein in the porcine epididymal fluid and the possibility that the HE1 homology is involved in the regulation of the lipid composition of the sperm membranes during the maturation in epidIDymis is discussed.
Journal ArticleDOI
The epididymis and sperm maturation: a perspective.
TL;DR: In common mammals, sperm leaving the testis are incapable of fertilizing a female gamete, and when assessing sperm maturation it is necessary to establish the proportion of sperm that has completed and retained all steps of maturation necessary to achieve fertilization of oocytes under the conditions imposed.
References
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Journal ArticleDOI
Lipid composition and metabolism in testicular and ejaculated ram spermatozoa
TL;DR: It is suggested that lipids are a source of substrate for spermatozoa during their passage through the epididymis as well as radioactivity from glucose into formate than into acetate, whereas a higher proportion of radioactivity was found in acetate in ejaculated cells.
Journal ArticleDOI
Isolation and characterization of an esterified form of steryl glucoside.
TL;DR: A hitherto unreported esterified form of steryl glucoside has been isolated from potato tuber lipids and soybean phosphatides as discussed by the authors, which is composed of sterol, glucose, and fatty acid in the molar ratio 1:1:1.
Journal ArticleDOI
Comparative lipid analysis of purified plasma membranes and shed extracellular membrane vesicles from normal murine thymocytes and leukemic GRSL cells
TL;DR: The lipid fluidity in purified plasma membranes of murine leukemic GRSL cells, as measured by fluorescence polarization, is much higher than in PM of normal thymocytes, which was found to be due to relatively low contents of cholesterol and sphingomyelin and a high amount of unsaturated fatty acyl chains in the phospholipids.
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Pentacyclic triterpenoids and sterols from seven species of mangrove
TL;DR: Seven species of fresh mangrove leaves were homogenized using chloroform—methanol and the extract was diluted with water to precipitate out triterpenoids and sterols, which were separated into neutral and acidic fractions.
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