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Heat shock protein 70 (HSP70) promotes air exposure tolerance of Litopenaeus vannamei by preventing hemocyte apoptosis.

Abstract：

:Brief pretreatment of cold shock at 13 °C for 3 min proved to be an inducer of heat shock protein 70 (HSP70) and improved stress tolerance as a molecular chaperone. With the improvement of air exposure tolerance, HSP70 in shrimp hemocytes was upregulated in mRNA and protein levels after cold shock. Both HSP70 RNA interference (RNAi) gene knockdown and recombinant HSP70 (rHSP70) injection were successfully established in order to investigate the role of HSP70 in response to air exposure stress. Shrimp receiving rHSP70 showed an improved survival rate (80%) with no significant difference (p > 0.05) compared to cold shock treated shrimp (control, 90%) under air exposure, but the survival rate of HSP70-knockdown shrimp was significantly lower (62%, p < 0.05). Reactive oxygen species (ROS) content, relative expression of cytochrome c, caspase-3 activity, and apoptosis rate in hemocytes of HSP70 enriched shrimp (i.e., cold shock and rHSP70 injection) were significantly lower (p < 0.05) than HSP70-knockdown shrimp. Results suggested that HSP70 could be induced by cold shock and contributed to improve the tolerance of shrimp suffering air exposure by blocking the apoptosis pathway through scavenging intracellular ROS, inhibiting cytochrome c expression, inhibiting release from mitochondria, and inactivating caspase-3. This work updates the understanding of cold shock mechanism in water-free transportation of aquatic animals.

journal_name

Dev Comp Immunol

journal_title

Developmental and comparative immunology

authors

Guan W,Wei X,Nong W,Shao Y,Mao L

doi

10.1016/j.dci.2020.103844

subject

Has Abstract

pub_date

2021-01-01 00:00:00

pages

103844

eissn

0145-305X

issn

1879-0089

pii

S0145-305X(20)30399-2

journal_volume

114

pub_type

杂志文章

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