Transcriptome analysis reveals the high temperature induced damage is a significant factor affecting the osmotic function of gill tissue in Siberian sturgeon (Acipenser baerii)
Posted on 2023-04-13 - 11:27
Abstract Background Maintaining osmotic equilibrium plays an important role in the survival of cold-water fishes. Heat stress has been proven to reduce the activity of Na+/K+-ATPase in the gill tissue, leading to destruction of the osmotic equilibrium. However, the mechanism of megatemperature affecting gill osmoregulation has not been fully elucidated. Results In this study, Siberian sturgeon (Acipenser baerii) was used to analyze histopathological change, plasma ion level, and transcriptome of gill tissue subjected to 20℃, 24℃and 28℃. The results showed that ROS level and damage were increased in gill tissue with the increasing of heat stress temperature. Plasma Cl− level at 28℃ was distinctly lower than that at 20℃ and 24℃, while no significant difference was found in Na+ and K+ ion levels among different groups. Transcriptome analysis displayed that osmoregulation-, DNA-repair- and apoptosis-related terms or pathways were enriched in GO and KEGG analysis. Moreover, 194 osmoregulation-related genes were identified. Amongst, the expression of genes limiting ion outflow, occluding (OCLN), and ion absorption, solute carrier family 4, member 2 (AE2) solute carrier family 9, member 3 (NHE3) chloride channel 2 (CLC-2) were increased, while Na+/K+-ATPase alpha (NKA-a) expression was decreased after heat stress. Conclusions This study reveals for the first time that the effect of heat stress on damage and osmotic regulation in gill tissue of cold-water fishes. Heat stress increases the permeability of fish’s gill tissue, and induces the gill tissue to keep ion balance through active ion absorption and passive ion outflow. Our study will contribute to research of global-warming-caused effects on cold-water fishes.
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Yang, Shiyong; Li, Datian; Feng, Langkun; Zhang, Chaoyang; Xi, Dandan; Liu, Hongli; et al. (2023). Transcriptome analysis reveals the high temperature induced damage is a significant factor affecting the osmotic function of gill tissue in Siberian sturgeon (Acipenser baerii). figshare. Collection. https://doi.org/10.6084/m9.figshare.c.6583009.v1
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AUTHORS (17)
SY
Shiyong Yang
DL
Datian Li
LF
Langkun Feng
CZ
Chaoyang Zhang
DX
Dandan Xi
HL
Hongli Liu
CY
Chaozhan Yan
ZX
Zihan Xu
YZ
Yujie Zhang
YL
Yunkun Li
TY
Taiming Yan
ZH
Zhi He
JW
Jiayun Wu
QG
Quan Gong
JD
Jun Du
XH
Xiaoli Huang
XD
Xiaogang Du