NDLI: The known two types of transglutaminases regulate immune and stress responses in white shrimp, Litopenaeus vannamei.

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The known two types of transglutaminases regulate immune and stress responses in white shrimp, Litopenaeus vannamei.

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The known two types of transglutaminases regulate immune and stress responses in white shrimp, Litopenaeus vannamei.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Chang, Chin-Chyuan Chang, Hao-Che Liu, Kuan-Fu Cheng, Winton
Description	Author Affiliation: Chang CC ( Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan, ROC.); Chang HC ( Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan, ROC.); Liu KF ( Tungkang Biotechnology Research Center, Fisheries Research Institute, C.O.A, Pingtung 92845, Taiwan, ROC.); Cheng W ( Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan, ROC. Electronic address: winton@mail.npust.edu.tw.)
Abstract	Transglutaminases (TGs) play critical roles in blood coagulation, immune responses, and other biochemical functions, which undergo post-translational remodeling such as acetylation, phosphorylation and fatty acylation. Two types of TG have been identified in white shrimp, Litopenaeus vannamei, and further investigation on their potential function was conducted by gene silencing in the present study. Total haemocyte count (THC), differential haemocyte count (DHC), phenoloxidase activity, respiratory bursts (release of superoxide anion), superoxide dismutase activity, transglutaminase (TG) activity, haemolymph clotting time, and phagocytic activity and clearance efficiency to the pathogen Vibrio alginolyticus were measured when shrimps were individually injected with diethyl pyrocarbonate-water (DEPC-H2O) or TG dsRNAs. In addition, haemolymph glucose and lactate, and haemocytes crustin, lysozyme, crustacean hyperglycemic hormone (CHH), transglutaminaseI (TGI), transglutaminaseII (TGII) and clotting protein (CP) mRNA expression were determined in the dsRNA injected shrimp under hypothermal stress. Results showed that TG activity, phagocytic activity and clearance efficiency were significantly decreased, but THC, hyaline cells (HCs) and haemolymph clotting time were significantly increased in the shrimp which received LvTGI dsRNA and LvTGI + LvTGII dsRNA after 3 days. However, respiratory burst per haemocyte was significantly decreased in only LvTGI + LvTGII silenced shrimp. In hypothermal stress studies, elevation of haemolymph glucose and lactate was observed in all treated groups, and were advanced in LvTGI and LvTGI + LvTGII silenced shrimp following exposure to 22 °C. LvCHH mRNA expression was significantly up-regulated, but crustin and lysozyme mRNA expressions were significantly down-regulated in LvTGI and LvTGI + LvTGII silenced shrimp; moreover, LvTGII was significantly increased, but LvTGI was significantly decreased in LvTGI silenced shrimp following exposure to 28 and 22 °C. Knockdown of LvTGI and LvTGI + LvTGII also significantly increased the mortality of L. vannamei challenged with the pathogen V. alginolyticus. The same consequences have been confirmed in LvTGII silenced shrimp in our previous study. These results indicate that LvTGI and LvTGII not only reveal a complementary effect in gene expression levels but also play a key function in the immune defence mechanism of shrimp, by regulating the haemolymph coagulation, immune parameters and immune related gene expression, and in the regulation of carbohydrate metabolism.
File Format	HTM / HTML
ISSN	0145305X
Journal	Developmental & Comparative Immunology
Volume Number	59
e-ISSN	18790089
Language	English
Publisher	Elsevier
Publisher Date	2016-06-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Immunology
Content Type	Text
Resource Type	Article
Subject	Developmental Biology Immunology

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