Oysters' Thermotolerance Mechanism Uncovered Amid Global Warming Threats

Strategic Insights -

Researchers have made significant progress in understanding the molecular switch controlling oysters' thermotolerance, a crucial adaptation to cope with the escalating temperatures caused by global warming. The study, led by the Chinese Academy of Sciences, has identified ERK kinase as a key regulator of oysters' thermotolerance, shedding light on the intricate pathway cross-talk and gene expression involved in this process. The findings hold substantial implications for breeding heat-resistant oyster strains and advancing ecological conservation and sustainable aquaculture in the face of climate change.

Key Takeaways:

  • The ERK kinase pathway plays a crucial role in oysters' thermotolerance, serving as a molecular switch that regulates gene expression in response to heat stress.
  • The study reveals that ERK kinase activates phagocytosis, inhibits apoptosis, and optimizes energy conversion processes in oysters under heat stress.
  • The investigation integrated RNA-Seq, physiological, and biochemical assays to demonstrate the critical role of ERK-regulated genes in thermal adaptation.
  • The research also highlighted the importance of the PI3K-AKT pathway, mTOR pathway, and NF-κB signaling pathway in oyster thermotolerance.
  • The study applied combined treatments with ERK kinase inhibitors and heat stress to investigate the transcriptional regulatory role of ERK kinase in oyster thermotolerance.
  • The research demonstrated that ERK kinase is a target for breeding heat-resistant oyster strains, offering a dual foundation for ecological conservation and sustainable aquaculture in the context of global warming.

Statistics:

  • The study involved the analysis of two congeneric oyster species: Crassostrea gigas and Crassostrea angulata.
  • The research integrated transcriptomic analysis of the two species to confirm the critical role of ERK-regulated genes in thermal adaptation.
  • The study used a combination treatment approach with ERK kinase inhibitors and heat stress, integrated with RNA-Seq and physiological/biochemical assays.
  • The investigation demonstrated that ERK kinase regulates the expression of thermotolerance-related genes in oysters under heat stress.

Sources:

  • Mapk/erk-driven Transcriptional Regulation Mediates Divergent Thermal Tolerance In Two Congeneric Oyster Species. Aquaculture, 2025;609.
  • NewsRx. Studies from Chinese Academy of Sciences Have Provided New Information about Global Warming and Climate Change (Mapk/erk-driven Transcriptional Regulation Mediates Divergent Thermal Tolerance In Two Congeneric Oyster Species). Global Warming Focus. October 20, 2025; p 7350.