Sumio Ishijima


Affiliation: Tokyo Institute of Technology
Country: Japan


  1. request reprint
    Ishijima S, Baba S, Mohri H, Suarez S. Quantitative analysis of flagellar movement in hyperactivated and acrosome-reacted golden hamster spermatozoa. Mol Reprod Dev. 2002;61:376-84 pubmed
    ..These results suggest that both extreme pro- and anti-hook bends are essential in the acrosome-reacted spermatozoa even though beat frequency decreased markedly. ..
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    Ishijima S. Digital image analysis of flagellar beating and microtubule sliding of activated and hyperactivated sperm flagella. Soc Reprod Fertil Suppl. 2007;65:327-30 pubmed
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    Ishijima S. The velocity of microtubule sliding: its stability and load dependency. Cell Motil Cytoskeleton. 2007;64:809-13 pubmed
    ..Data from sea urchin spermatozoa also satisfied the equation, suggesting that the same microtubule sliding system functions in both the mammalian and echinoderm spermatozoa. ..
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    Ishijima S. Mechanical constraint converts planar waves into helices on tunicate and sea urchin sperm flagella. Cell Struct Funct. 2012;37:13-9 pubmed
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    Ishijima S. Regulations of microtubule sliding by Ca2+ and cAMP and their roles in forming flagellar waveforms. Cell Struct Funct. 2013;38:89-95 pubmed
    ..cAMP enhanced the three-dimensionality of the flagellar waves at a low Ca(2+). These changes in the flagellar waves were caused by different regulations of the microtubule sliding by calcium, cAMP, and MgATP(2-)...