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Heat-shock-induced cathepsin B activity during IVF and culture compromises the developmental competence of bovine embryos

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Title: Heat-shock-induced cathepsin B activity during IVF and culture compromises the developmental competence of bovine embryos
Authors: Yamanaka, Ken-ichi Browse this author →KAKEN DB
Khatun, Hafiza Browse this author
Egashiraa, Junki Browse this author
Balboula, Ahmed Zaky Browse this author
Tatemoto, Hideki Browse this author →KAKEN DB
Sakatani, Miki Browse this author →KAKEN DB
Takenouchi, Naoki Browse this author
Wada, Yasuhiko Browse this author →KAKEN DB
Takahashi, Masashi Browse this author →KAKEN DB
Keywords: Cathepsin B
Heat shock
Embryonic development
Issue Date: 1-Jul-2018
Publisher: Elsevier
Journal Title: Theriogenology
Volume: 114
Start Page: 293
End Page: 300
Publisher DOI: 10.1016/j.theriogenology.2018.04.005
Abstract: Heat stress can cause significant reproductive dysfunction in mammals and previous studies report that expression and activity of cathepsin B (CTSB), a lysosomal cysteine protease, is negatively correlated with the developmental competence of bovine oocytes and embryos. However, the relationship between heat shock (HS) and CTSB remains largely unknown. Here, we investigated the effects of HS during IVF and early embryonic stages of IVC on CTSB activity and developmental competence in bovine embryos. HS (40 C for 6 h during IVF and 20 h during IVC) caused a significant increase in CTSB activity irrespective of the developmental stage or duration of HS. The developmental rate to the blastocyst stage was also significantly decreased by HS. Additionally, HS during IVC significantly increased the number of apoptotic cells in blastocysts. Notably, these HS-induced changes in blastocyst development and quality were significantly improved by inhibition of CTSB activity, indicating a key role for CTSB. These results showed that CTSB activity plays an essential role in HS-induced dysfunction in bovine embryo development, and that inhibition of this activity could enhance the developmental competence of heat-shocked embryos. (C) 2018 Elsevier Inc. All rights reserved.
Rights: © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高橋 昌志

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