• 研究課題をさがす
  • 研究者をさがす
  • KAKENの使い方
  1. 課題ページに戻る

2020 年度 実績報告書

魚類の給餌を最適化する新たなアプローチ:オートファジーによる生体防御機構の解明

研究課題

研究課題/領域番号 18K14520
研究機関九州大学

研究代表者

Mohapatra Sipra  九州大学, 農学研究院, 学術研究員 (80715441)

研究期間 (年度) 2018-04-01 – 2021-03-31
キーワードRed Sea bream / Autophagy / Cell death / liver / disease / E. tarda / Irridovirus / mitophagy
研究実績の概要

I have identified several downstream genes of HKII using chromatin immunoprecipitation (ChIP) and validated their actions in HKII mediated autophagy. Using both in vitro and in vivo analysis, I found that mTOR is antagonized by HKII while AMPK and ULK are directly activated by HKII. Importantly we found that, starvation induces HKII-AMPK-ULK pathway while steroid manipulation or temperature stress bypasses the AMPK action and shifts them to HKII-ULK pathway. We also determined that HKII pathway is accelerated during early stages of E.tarda infection, but not from irridoviral infection. To understand better, we isolated the mitochondria from female and male red sea bream liver hepatocytes, subjected it to various stressors (starvation, high temperature and steroid manipulation) and infections, and found a clear sex specific differences in mitochondria HKII expression in all the samples except for the irridovirus infected hepatocytes. Notably, all these events reduces the glucose content in mitochondria. Our data suggests that, HKII, a glycolytic molecule, can sense mitochondrial glucose derangements, and modulate its intracellular localization and thus can regulate mitophagy and cellular autophagy in fish.

URL: 

公開日: 2021-12-27  

サービス概要 検索マニュアル よくある質問 お知らせ 利用規程 科研費による研究の帰属

Powered by NII kakenhi