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Free Content Histone Deacetyltransferase1 Expression in Mouse Oocyte and their in Vitro-Fertilized Embryo: Effect of Oocyte Vitrification

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This study was conducted to investigate the expression of Histone Deacetyltransferase1 (HDAC1) in mouse embryos derived from the vitrified-warmed oocytes. Firstly, the mouse oocytes at metaphaseII (MII) stage were randomly allocated into three groups: A untreated (control), B exposed to vitrification solution (VS) without being plunged into liquid nitrogen (toxicity), or C vitri fied by open-pulled straw(OPS) method (vitrification). After warming, they were fertilized in vitro. Fresh oocytes were used as control. Expression of HDAC1 was then examined in MII mouse oocytes and embryos by immunofluorescence with anti-HDAC1 polyclonal antibody and fluorescein isothiocyanate-conjugated goat anti-rabbit IgG. Results showed that after in vitro fertilization (IVF), developmental rates to two-cell embryos (38.52%), 4-cell embryos (35.25%), morula (31.97%) and blastocysts (26.23%) in cryopreserved oocytes were all significantly lower than those of fresh oocytes (P <0.01). In addition, HDAC1 expression in the vitrified group was significantly lower (P<0.05) than that in the control and toxicity groups at all developmental stages except for the blastocyst. Moreover, the vitrified-warmed oocytes showed significantly lower (P<0.05) HDAC1 expression compared with that of control and toxicity groups. In conclusion, HDAC1 was expressed both in oocytes and in their in vitro-fertilized embryos. This decreased expression of HDAC1 in mouse oocytes and the embryos due to the cryopreservation may have a negative impact on embryo development.

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Keywords: EARLY EMBRYO; HISTONE DEACETYLTRANSFERASE 1; MOUSE; OOCYTE; OPS VITRIFICATION

Document Type: Research Article

Publication date: January 1, 2011

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  • CryoLetters is a bimonthly international journal for low temperature sciences, including cryobiology, cryopreservation or vitrification of cells and tissues, chemical and physical aspects of freezing and drying, and studies involving ecology of cold environments, and cold adaptation

    The journal publishes original research reports, authoritative reviews, technical developments and commissioned book reviews of studies of the effects produced by low temperatures on a wide variety of scientific and technical processes, or those involving low temperature techniques in the investigation of physical, chemical, biological and ecological problems.

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