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Effects of the conditioned medium of mesenchymal stem cells on mouse oocyte activation and development 56
Feng,D.Q.; Zhou,Y.; Ling,B.; Gao,T.; Shi,Y.Y.; Wei,H.M.; Tian,Z.G..
Mesenchymal stem cells (MSCs) have been reported to secrete a variety of cytokines and growth factors acting as trophic suppliers, but little is known regarding the effects of conditioned medium (CM) of MSCs isolated from femurs and tibias of mouse on the artificial activation of mouse oocytes and on the developmental competence of the parthenotes. In the current study, we investigated the effect of CM on the events of mouse oocyte activation, namely oscillations of cytosolic calcium concentration ([Ca²+]i), meiosis resumption, pronucleus formation, and parthenogenetic development. The surface markers of MSCs were identified with a fluorescence-activated cell sorter. The dynamic changes of the spindle and formation of pronuclei were examined by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mesenchymal stem cells; Oocyte activation; Parthenogenesis; Calcium; Cytochalasin B.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000600006
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Enhanced Oocyte Activation by Intracytoplasmic Injection of Porcine Spermatozoa Pre-treated with Dithiothreitol 19
Watanabe, Hiroyuki; Akiyama, Junko; Bhuiyan, Mohammad Musharraf Uddin; Fukui, Yutaka; 福井, 豊.
The aim of this study was to confirm the effect of dithiothreitol (DTT)-treated spermatozoa on oocyte activation following intracytoplasmic sperm injection (ICSI). Boar spermatozoa with or without DTT treatment (5 mM, 30 min) were injected into in vitro matured porcine oocytes, and the nuclear phase in presumptive zygotes was observed at 3 h intervals up to 12 h after ICSI. Furthermore, developmental competence of embryos produced by DTT-treated or non-treated spermatozoa was monitored after cultivation in vitro for 144 h. Male and female pronuclear formation rates in the oocytes injected with DTT-treated spermatozoa were significantly (P < 0.05) higher than those in the oocytes injected with non-treated spermatozoa. Additionally, we observed that...
Palavras-chave: Assisted reproductive technology; Dithiothreitol; Intracytoplasmic sperm injection; Oocyte activation.
Ano: 2009 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2803
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