Phosphatidylcholine Is an Endogenous Substrate for Energy Metabolism in Spermatozoa of Sea Urchins of the Order Echinoidea
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概要
- 論文の詳細を見る
A study was conducted to examine an endogenous substrate for energy metabolism in spermatozoa of six species of sea urchin, Anthocidaris crassispina, Echinometra mathaei, Pseudocentrotus depressus, Strongylocentrotus intermedius, Strongylocentrotus nudus and Temnopleurus hardwickii, which belong to the order Echinoidea. These spermatozoa contained cholesterol and several kinds of phospholipids, including phosphatidylcholine (PC), phosphatidylserine, phosphatidylethanolamine and cardiolipin. After dilution of dry sperm from these species in seawater, a rapid decrease in the level of PC was observed, but other phospholipids remained at constant levels. The preferential hydrolysis of PC was related to the properties of phospholipase A_2. Ultrastructural study showed that lipid bodies were present within mitochondria of the sperm midpieces of A. crassispina, E. mathaei and P. depressus. After incubation in seawater, the lipid bodies became small or disappeared. Thus it is concluded that spermatozoa of sea urchins of the order Echinoidea commonly use PC located in the lipid bodies within mitochondria as a substrate for energy metabolism.
- 社団法人日本動物学会の論文
- 1993-02-15
著者
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NAKAMURA Masaru
Department of Computer Science and Engineering, Nagoya Institute of Technology
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Mita Masatoshi
Department Of Biochemistry Teikyo University School Of Medicine
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Mita Masatoshi
Department Of Applied Physics Faculty Of Engineering Osaka City University
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Nakamura Masaru
Department Of Basic Life Science Faculty Of Medicine Teikyo University
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Nakamura Masaru
Department Of Applied Chemistry Faculty Of Science And Engineering Kinki University
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