Recognition of purified beta 1,3/1,6 glucan and molecular signalling in the intestine of Atlantic salmon - PubMed (original) (raw)
Recognition of purified beta 1,3/1,6 glucan and molecular signalling in the intestine of Atlantic salmon
Viswanath Kiron et al. Dev Comp Immunol. 2016 Mar.
Free article
Abstract
Atlantic salmon was orally intubated with a highly purified β-glucan product (MacroGard(®)) to study the recognition of the molecule by the receptor genes, the regulation of the downstream signalling genes and global proteins, and the micromorphological changes in the intestine. The β-glucan receptor genes of Atlantic salmon, sclra, sclrb, sclrc and cr3, seem to recognize the molecule, and initiate the downstream ITAM-motif signalling, as evident from the significantly high mRNA levels of ksyk, mapkin2, il1b and mip2a levels. Among the altered proteins, the Apoa4 (involved in carbohydrate and lipid metabolism); Tagln, Actb (uptake of β-glucan); Psma2 (associated with substrate recognition); and Ckt (energy metabolism-related) were the overexpressed ones. The underexpressed proteins included the Uk114, Rpl9, Ctsb and Lgal that are connected to proliferation, LPS-stimulation, Il1b and lactose recognition, respectively. Furthermore, the mRNA levels of igt and the number of immune cells in the distal intestine were found to increase upon β-glucan uptake by the fish. This study provides some clues on the mechanisms by which the β-glucan evokes response in Atlantic salmon, particularly at the intestinal level.
Keywords: Actb; Atlantic salmon; Beta-1,3/1,6 glucan; C-type lectin receptor genes; MacroGard(®); Psma2; Tagln.
Copyright © 2015 Elsevier Ltd. All rights reserved.
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