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Insects 2015, 6(2), 368-380; doi:10.3390/insects6020368

Tissue-Specific Immune Gene Expression in the Migratory Locust, Locusta Migratoria

1
School of Biological Sciences, The University of Sydney, NSW 2006, Australia
2
Plant Functional Biology and Climate Change Cluster, University of Technology Sydney, New South Wales 2007, Australia
3
The Charles Perkins Centre, The University of Sydney, NSW 2006, Australia
*
Author to whom correspondence should be addressed.
Academic Editors: Kenneth Wilson and Sheena Cotter
Received: 3 March 2015 / Revised: 2 April 2015 / Accepted: 8 April 2015 / Published: 16 April 2015
(This article belongs to the Special Issue Parasite-Insect Interactions)
View Full-Text   |   Download PDF [230 KB, uploaded 16 April 2015]   |  

Abstract

The ability of hosts to respond to infection involves several complex immune recognition pathways. Broadly conserved pathogen-associated molecular patterns (PAMPs) allow individuals to target a range of invading microbes. Recently, studies on insect innate immunity have found evidence that a single pathogen can activate different immune pathways across species. In this study, expression changes in immune genes encoding peptidoglycan-recognition protein SA (PGRP-SA), gram-negative binding protein 1 (GNBP1) and prophenoloxidase (ProPO) were investigated in Locusta migratoria, following an immune challenge using injected lipopolysaccharide (LPS) solution from Escherichia coli. Since immune activation might also be tissue-specific, gene expression levels were followed across a range of tissue types. For PGRP-SA, expression increased in response to LPS within all seven of the tissue-types assayed and differed significantly between tissues. Expression of GNBP1 similarly varied across tissue types, yet showed no clear expression difference between LPS-injected and uninfected locusts. Increases in ProPO expression in response to LPS, however, could only be detected in the gut sections. This study has revealed tissue-specific immune response to add a new level of complexity to insect immune studies. In addition to variation in recognition pathways identified in previous works, tissue-specificity should be carefully considered in similar works. View Full-Text
Keywords: insect immunity; gene expression; tissue-specificity; locust insect immunity; gene expression; tissue-specificity; locust
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Pulpitel, T.; Pernice, M.; Simpson, S.J.; Ponton, F. Tissue-Specific Immune Gene Expression in the Migratory Locust, Locusta Migratoria. Insects 2015, 6, 368-380.

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