1986
DOI: 10.1016/0020-711x(86)90085-6
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Phospholipid composition and phospholipid asymmetry of ram spermatozoa plasma membranes

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Cited by 37 publications
(18 citation statements)
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“…A plasma membrane analysis of mammalian epididymal spermatozoa revealed an exclusively high concentration of the choline-plasmalogens in the PC fractions of phospholipids, which are localized mainly in the outer membrane lipid monolayer. 2 This finding explains subsequent observations that alterations in PC concentration have been implicated in changes of sperm membrane fluidity. 3 A main pathway for the synthesis of PC in hepatic tissue is the methylation of phosphatidylethanolamine with the catalytic action of phosphatidylethanolamine N-methyltransferase (PEMT).…”
Section: Introductionsupporting
confidence: 76%
“…A plasma membrane analysis of mammalian epididymal spermatozoa revealed an exclusively high concentration of the choline-plasmalogens in the PC fractions of phospholipids, which are localized mainly in the outer membrane lipid monolayer. 2 This finding explains subsequent observations that alterations in PC concentration have been implicated in changes of sperm membrane fluidity. 3 A main pathway for the synthesis of PC in hepatic tissue is the methylation of phosphatidylethanolamine with the catalytic action of phosphatidylethanolamine N-methyltransferase (PEMT).…”
Section: Introductionsupporting
confidence: 76%
“…The total lipids of sperm from a limited number of species and changes in lipid composition in sperm membranes during the early steps before fertilization have been described (Joseph et al, 1991;Nikolopoulou et al, 1985;John et al, 1987;Daniel et al, 1980). Using biochemical and morphological techniques, several studies have demonstrated the differences in the phospholipid composition and the asymmetric distribution of phospholipids in the sperm plasma membrane bilayer (Hinkovska et al, 1986;Tesarik and Flechon, 1986;Bearer and Friend, 1982). The demonstration of lipid domains in mammalian sperm membranes has been difficult.…”
Section: Introductionmentioning
confidence: 99%
“…As in the case of somatic cells, the sperm cell membrane lipid matrix is a heterogeneous mix of PLs, glycolipids, and sterols, which are distributed asymmetrically across the membrane leaflets (Apel-Paz et al 2003). The PL distribution in PM of spermatozoa is asymmetric with PC present in the outer leaflet of the membrane, diphosphatidylglycerol and PS being localized predominantly to the inner monolayer (Hinkovska et al 1986), and asymmetry in PM is maintained by the presence of ATP-dependent PL translocator in sperm PM (Mü ller et al 1994, Nolan et al 1995. However, there are no reports on the presence of biogenic membrane flippase activity in sperm cells.…”
Section: Discussionmentioning
confidence: 99%