Experts and Doctors on sperm head in United States
Locale: United States
Topic: sperm head
Martin DeLeon P. Germ-cell hyaluronidases: their roles in sperm function. Int J Androl. 2011;34:e306-18 pubmed publisher
..Unsolved problems include functional redundancy, which can be addressed by double gene-knockouts, and identifying the murine hyase(s) involved in zona binding or whether this role shows species specificity. ..
Connor W, Lin D, Wolf D, Alexander M. Uneven distribution of desmosterol and docosahexaenoic acid in the heads and tails of monkey sperm. J Lipid Res. 1998;39:1404-11 pubmed
..The large number of double bonds in DHA, six, and in desmosterol, two, may contribute to the membrane fluidity necessary for the motility of the sperm tails. ..
Manier M, Lüpold S, Belote J, Starmer W, Berben K, Ala Honkola O, et al
. Postcopulatory sexual selection generates speciation phenotypes in Drosophila. Curr Biol. 2013;23:1853-62 pubmed publisher
..This experimental approach to "speciation phenotypes" illustrates how knowledge of sperm precedence mechanisms can be used to predict the mechanisms and extent of reproductive isolation between populations and species. ..
Huang Z, Vijayaraghavan S. Increased phosphorylation of a distinct subcellular pool of protein phosphatase, PP1gamma2, during epididymal sperm maturation. Biol Reprod. 2004;70:439-47 pubmed
..The distinct subcellular localization and changes in its level during sperm maturation suggest a possible role for sperm phosphorylated PP1gamma2 in signaling events during fertilization. ..
Kolettis P, Burns J, Nangia A, Sandlow J. Outcomes for vasovasostomy performed when only sperm parts are present in the vasal fluid. J Androl. 2006;27:565-7 pubmed
..There does not appear to be a threshold obstructive interval above which VE would be indicated in this setting. If only an occasional sperm head is noted in the vasal fluid, then the surgeon should consider vasoepididymostomy. ..
Antelman J, Manandhar G, Yi Y, Li R, Whitworth K, Sutovsky M, et al
. Expression of mitochondrial transcription factor A (TFAM) during porcine gametogenesis and preimplantation embryo development. J Cell Physiol. 2008;217:529-43 pubmed publisher
..Altogether, our data on the role of TFAM in mitochondrial function and inheritance have broad implications for cell physiology and evolutionary biology. ..
Manandhar G, Miranda Vizuete A, Pedrajas J, Krause W, Zimmerman S, Sutovsky M, et al
. Peroxiredoxin 2 and peroxidase enzymatic activity of mammalian spermatozoa. Biol Reprod. 2009;80:1168-77 pubmed publisher
..Peroxidase activity in sperm extracts is not due to the glutathione system and therefore possibly involves PRDX2 and other peroxiredoxins. ..
Manier M, Belote J, Berben K, Novikov D, Stuart W, Pitnick S. Resolving mechanisms of competitive fertilization success in Drosophila melanogaster. Science. 2010;328:354-7 pubmed publisher
..We find that competitive male fertilization success derives from a multivariate process involving ejaculate-female and ejaculate-ejaculate interactions, as well as complex sperm behavior in vivo...
Yoon S, Fissore R. Release of phospholipase C zetaand [Ca2+]i oscillation-inducing activity during mammalian fertilization. Reproduction. 2007;134:695-704 pubmed