Journal
AQUACULTURE
Volume 366, Issue -, Pages 40-45Publisher
ELSEVIER
DOI: 10.1016/j.aquaculture.2012.09.001
Keywords
Kuruma shrimp; mRNA transcript; Penaeidin; Crustin; Lysozyme; Nucleotides
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (Monbukagakusho), Japan
- JSPS Asian CORE Program and Scientific Research [23580257]
- Grants-in-Aid for Scientific Research [23580257] Funding Source: KAKEN
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Immune stimulant effects of a nucleotide-rich baker's yeast extract (Vertex IG20) were investigated in the kuruma shrimp, Marsupenaeus japonicus by examining expression of anti-microbial peptides/proteins (AMPs) such as penaeidin (MjPen), crustin (MjCrus) and lysozyme (MjLyz) genes. Furthermore, to confirm that the baker's yeast extract-induced AMPs were functional, we also assessed the effect of its oral administration on resistance to Vibrio nigripulchritudo infection in the kuruma shrimp. Our results demonstrate that baker's yeast extract-injected and fed shrimps displayed a significant up-regulation of MjPen, MjCrus and MjLyz gene expression in the lymphoid organ. Moreover, significantly increased (P<0.01) resistance to the bacterial pathogen in term of better post infection survival (66.6%) was observed in the shrimp fed with the yeast extract-incorporated diet compared with the control diet fed group (8.3%). The present study indicates the immunostimulatory effects of the nucleotide-rich baker's yeast extract on the kuruma shrimp immune system and supports its potential use in aquaculture. (C) 2012 Elsevier B.V. All rights reserved.
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