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Priming the immune system of Penaeid shrimp by bacterial HSP 70 (DnaK)
Author(s) -
Phuoc L H,
Hu B,
Wille M,
Hien N T,
Phuong V H,
Tinh N T N,
Loc N H,
Sorgeloos P,
Bossier P
Publication year - 2016
Publication title -
journal of fish diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 85
eISSN - 1365-2761
pISSN - 0140-7775
DOI - 10.1111/jfd.12388
Subject(s) - shrimp , biology , vibrio harveyi , prophenoloxidase , vibrio alginolyticus , microbiology and biotechnology , penaeus monodon , penaeidae , immune system , hemolymph , hsp70 , priming (agriculture) , vibrio , heat shock protein , decapoda , innate immune system , immunology , bacteria , biochemistry , ecology , crustacean , gene , genetics , germination , botany
This study was conducted to test the effect of DnaK on priming immune responses in Penaeid shrimp. Juvenile‐specific pathogen‐free ( SPF ) P. vannamei shrimp were injected with 0.05 μg recombinant DnaK. One hour post‐DnaK priming, a non‐lethal dose of Vibrio campbellii (10 5 CFU shrimp −1 ) was injected. Other treatments include only DnaK or V. campbellii injection or control with blank inocula. The haemolymph of three shrimp from each treatment was collected at 1.5, 6, 9 and 12 h post‐DnaK priming (hpp). It was verified that injection with DnaK and V. campbellii challenge affected the transcription of 3 immune genes, transglutaminase‐1 ( TG ase‐1), prophenoloxidase‐2 (pro PO ‐2) and endogenous HSP 70 (lv HSP 70). In P. monodon , shrimp were first injected with DnaK at a dose of 10 μg shrimp −1 and one hour later with 10 6 CFU of V. harveyi ( BB 120) shrimp −1 . Shrimp injected with DnaK showed a significant increase in pro PO expression compared to the control ( P < 0.05). Yet a double injection (DnaK and Vibrio ) seemed to cause an antagonistic response at the level of expression, which was not equalled at the level of PO activity. Those results suggest that DnaK is able to modulate immune responses in P. vannamei and P. monodon .