Expression and Localization of Heat Shock Protein 70 in Frozen-thawed IVF and Nuclear Transferred Bovine Embryos

Chung, K.S.; Choi, Y.J.; Song, S.J.; Do, J.T.; Yoon, B.S.; Kim, Y.J.; Lee, H.T.

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자료유형: 학술저널

저자정보: Chung, K.S. (Animal Resources Research Center, Konkuk Univ) Choi, Y.J. (Animal Resources Research Center, Konkuk University) Song, S.J. (Animal Resources Research Center, Konkuk University) Do, J.T. (Animal Resources Research Center, Konkuk University) Yoon, B.S. (Animal Resources Research Center, Konkuk University) Kim, Y.J. (Animal Resources Research Center, Konkuk University) Lee, H.T. (Animal Resources Research Center, Konkuk University)

저널정보: 한국동물번식학회 한국가축번식학회지 한국가축번식학회지 제26권 제4호

발행연도: 2002.1

수록면: 311 - 320 (10page)

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The objective of this study was to assess the developmental potential in vitro produced embryos frozen-thawed with the various containers, and also examined expression and localization of heat shock protein 70 at these embryos. For the vitrification, 2-cell, 8-cell and blastocyst stage embryos produced by in vitro fertilization (IVF) and nuclear transfer (NT) were exposed the ethylene glycol 5.5 M freezing solution (EC 5.5) for 30 sec, loaded on each containers such EM grid, straw and cryo-loop, and then immediately plunged into liquid nitrogen. Thawed embryos were serially diluted in sucrose solution, each for 1 min. and cultured in CRI-aa medium. Survival rates of the vitrification production were assessed by re-expanded, hatched blastocysts. There were no differences in the survival rates of IVF using EM grid and cryo-loop. However, survival rates by straw were relatively lower than other containers. The use of cryo-loop resulted in only survival of nuclear transferred embryos (43.7%). Also, there embryos after IVF or NT were analysed by semi-quantitive reverse transcription-polymerase chain reaction (RT- PCR) methods for hsp 70 mRNA expression. Results revealed the expression of hsp 70 mRNh were higher thawed embryos than control embryos. Immunocytochemistry used to localize the hsp 70 protein in embryos. Two and 8-cell embryos derived under control condition was evenly distributed in the cytoplasm but appeared as aggregates in some frozen-thawed embryos. However, in the control, blastocysts displayed aggregate signal while Hsp70 in frozen-thawed blastocysts appeared to be more uniform In distribution. Therefore, this result suggests that the exploiting Hsp 70 in the early embryos may be role for protection of stress condition for increase viability of embryos within IVF, NT and there frozen-thawed embryos.

#Vitrification #Nuclear transfer #Hsp 70 #Immnocytochmistry #RT-PCR

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Chung, K.S.

소속기관 Animal Resources Research Center, Konkuk Univ

주요연구분야 농수해양학 > 축산학

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Choi, Y.J.