Effect of salinity on regulation mechanism of neuroendocrine-immunoregulatory network in Litopenaeus vannamei

Fish & Shellfish Immunology
Qun ZhaoJingjing Miao

Abstract

The effects of low salinity (transferred from 31‰ to 26‰, 21‰, and 16‰) on the regulation pathways of neuroendocrine-immunoregulatory network were investigated in Litopenaeus vannamei. The results showed that the hormones (corticotrophin-releasing hormone, adrenocorticotropic hormone) and biogenic amines (dopamine, noradrenaline, 5-hydroxytryptamine) concentrations in lower salinity groups increased significantly within 12 h. The gene expression of biogenic amine receptors showed that dopamine receptor D4 and α2 adrenergic receptor in lower salinity groups decreased significantly within 12 h, whereas the 5-HT7 receptor significantly increased within 1d. The second messenger synthetases (adenylyl cyclase, phospholipase C) and the second messengers (cyclic adenosine monophosphate, cyclic guanosine monophosphate) of lower salinity groups shared a similar trend in which adenylyl cyclase and cyclic adenosine monophosphate reached the maximum at 12 h, whereas phospholipase C and cyclic guanosine monophosphate reached the minimum. The immune parameters (total hemocyte count, phenoloxidase activity, phagocytic activity, crustin expression, antibacterial activity, C-type lectin expression, hemagglutinating activity) in lower salinity gr...Continue Reading

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Jan 15, 2021·Zoology : Analysis of Complex Systems, ZACS·Wolfgang Stein, Steffen Harzsch
Oct 22, 2020·Journal of Invertebrate Pathology·Christopher J Coates, Kenneth Söderhäll

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