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Related Experiment Video

Updated: Jun 21, 2025

Metabolic Profile Analysis of Zebrafish Embryos
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Mitochondrial Fission Is Involved in Heat Resistance in Zebrafish.

Yousheng Mao1, KwangHeum Hong1,2, Li Li1

  • 1Department of Medicine, Graduate School, Wonkwang University, Iksan, Republic of Korea.

Zebrafish
|July 15, 2024
PubMed
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Heat acclimation and fasting protect zebrafish from heat stress by inducing mitochondrial fission. This finding offers a promising strategy for fish conservation amid global warming.

Area of Science:

  • Aquatic Biology
  • Environmental Science
  • Cellular Biology

Background:

  • Global warming and extreme weather events threaten biodiversity, particularly impacting fish populations due to rising water temperatures.
  • Understanding fish resilience to thermal stress is crucial for conservation and sustainable fisheries.

Purpose of the Study:

  • To investigate the protective effects of heat acclimation on zebrafish survival under thermal stress.
  • To explore the role of mitochondrial dynamics, specifically fission, in mediating heat resistance.

Main Methods:

  • Zebrafish were subjected to a 2-month heat acclimation period.
  • Mitochondrial state (fission/fusion) was analyzed in surviving zebrafish.
  • Fasting and mitochondrial fission inhibitors were used to assess their impact on heat stress survival.
Keywords:
heat acclimationheat resistanceheat stressmitochondrial fissionzebrafish

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Last Updated: Jun 21, 2025

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Main Results:

  • Heat acclimation significantly mitigated heat stress-induced mortality in adult zebrafish.
  • Surviving zebrafish exhibited a predominance of hepatic mitochondria in a fission state.
  • Short-term fasting induced mitochondrial fission and enhanced heat stress survival, an effect reversed by fission inhibitors.

Conclusions:

  • Mitochondrial fission is a key mechanism conferring heat resistance in zebrafish, observed in both adults and embryos.
  • Inducing mitochondrial fission presents a potential strategy for improving fish thermotolerance and aiding conservation efforts under climate change.