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The Effects of Destruxin A on Relish and Rel Gene Regulation to the Suspected Immune-Related Genes of Silkworm

Destruxin A (DA), a cyclodepsipeptidic mycotoxin of entomopathogenic fungus, Metarhizium anisopliae, has anti-immunity activity against insects, but the mechanism of immune regulation is not clear yet. In our previous experiment, the significant expression changes of Bm_nscaf2838_045, Bm_nscaf2674_0...

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Autores principales: Hu, Weina, He, Guangwei, Wang, Jingjing, Hu, Qiongbo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6155765/
https://www.ncbi.nlm.nih.gov/pubmed/28036076
http://dx.doi.org/10.3390/molecules22010041
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author Hu, Weina
He, Guangwei
Wang, Jingjing
Hu, Qiongbo
author_facet Hu, Weina
He, Guangwei
Wang, Jingjing
Hu, Qiongbo
author_sort Hu, Weina
collection PubMed
description Destruxin A (DA), a cyclodepsipeptidic mycotoxin of entomopathogenic fungus, Metarhizium anisopliae, has anti-immunity activity against insects, but the mechanism of immune regulation is not clear yet. In our previous experiment, the significant expression changes of Bm_nscaf2838_045, Bm_nscaf2674_066, and Bm_nscaf2767_133 genes in a silkworm’s hemocytes were found, which suggested that these genes might be involved in insect’s innate immunity. In the current experiment, the silkworm cell line Bm12 was used to survey the expression levels of these genes after the cells were treated with DA and the transcription factors BmRel, BmRelish1 and BmRelish2 were silenced by specific siRNA. The results indicated that, after the cells were treated by DA, the gene expression level of BmRelish2 was significantly downregulated, but BmRel and BmRelish1 were not changed. The results also showed that the gene expression levels of Bm_nscaf2838_045 and Bm_nscaf2674_066 had similar phenomena, i.e., downregulation with individual BmRelish1 gene silence or DA treatment, upregulation with combination of BmRelish1 gene silence and DA treatment, upregulation with individual BmRelish2 gene silence, and downregulation with combination of BmRelish2 gene silence plus DA treatment, but no changes in the BmRel gene silence combined with DA treatment. For the Bm_nscaf2767_133 gene, the downregulated expressions were found in individual BmRelish2 gene silence or DA treatment, upregulation in the combination treatment of BmRelish2 gene silence plus DA, and the individual treatment of BmRel or BmRelish1 silence. It is suggested that expressions of the Bm_nscaf2838_045 and Bm_nscaf2674_066 genes are closely related to the Imd signal pathway, but Bm_nscaf2767_133 genes might involve in both Toll and Imd pathways. Furthermore, the BmRelish1 gene acts as an activator and the BmRelish2 gene acts as a repressor for both Bm_nscaf2838_045 and Bm_nscaf2674_066 gene expressions. It also implies that DA may participate in the splicing process of BmRelish where BmRelish2 was promoted. Our research will provide new insights on the understanding of the activity mechanisms of destruxins.
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spelling pubmed-61557652018-11-13 The Effects of Destruxin A on Relish and Rel Gene Regulation to the Suspected Immune-Related Genes of Silkworm Hu, Weina He, Guangwei Wang, Jingjing Hu, Qiongbo Molecules Article Destruxin A (DA), a cyclodepsipeptidic mycotoxin of entomopathogenic fungus, Metarhizium anisopliae, has anti-immunity activity against insects, but the mechanism of immune regulation is not clear yet. In our previous experiment, the significant expression changes of Bm_nscaf2838_045, Bm_nscaf2674_066, and Bm_nscaf2767_133 genes in a silkworm’s hemocytes were found, which suggested that these genes might be involved in insect’s innate immunity. In the current experiment, the silkworm cell line Bm12 was used to survey the expression levels of these genes after the cells were treated with DA and the transcription factors BmRel, BmRelish1 and BmRelish2 were silenced by specific siRNA. The results indicated that, after the cells were treated by DA, the gene expression level of BmRelish2 was significantly downregulated, but BmRel and BmRelish1 were not changed. The results also showed that the gene expression levels of Bm_nscaf2838_045 and Bm_nscaf2674_066 had similar phenomena, i.e., downregulation with individual BmRelish1 gene silence or DA treatment, upregulation with combination of BmRelish1 gene silence and DA treatment, upregulation with individual BmRelish2 gene silence, and downregulation with combination of BmRelish2 gene silence plus DA treatment, but no changes in the BmRel gene silence combined with DA treatment. For the Bm_nscaf2767_133 gene, the downregulated expressions were found in individual BmRelish2 gene silence or DA treatment, upregulation in the combination treatment of BmRelish2 gene silence plus DA, and the individual treatment of BmRel or BmRelish1 silence. It is suggested that expressions of the Bm_nscaf2838_045 and Bm_nscaf2674_066 genes are closely related to the Imd signal pathway, but Bm_nscaf2767_133 genes might involve in both Toll and Imd pathways. Furthermore, the BmRelish1 gene acts as an activator and the BmRelish2 gene acts as a repressor for both Bm_nscaf2838_045 and Bm_nscaf2674_066 gene expressions. It also implies that DA may participate in the splicing process of BmRelish where BmRelish2 was promoted. Our research will provide new insights on the understanding of the activity mechanisms of destruxins. MDPI 2016-12-29 /pmc/articles/PMC6155765/ /pubmed/28036076 http://dx.doi.org/10.3390/molecules22010041 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hu, Weina
He, Guangwei
Wang, Jingjing
Hu, Qiongbo
The Effects of Destruxin A on Relish and Rel Gene Regulation to the Suspected Immune-Related Genes of Silkworm
title The Effects of Destruxin A on Relish and Rel Gene Regulation to the Suspected Immune-Related Genes of Silkworm
title_full The Effects of Destruxin A on Relish and Rel Gene Regulation to the Suspected Immune-Related Genes of Silkworm
title_fullStr The Effects of Destruxin A on Relish and Rel Gene Regulation to the Suspected Immune-Related Genes of Silkworm
title_full_unstemmed The Effects of Destruxin A on Relish and Rel Gene Regulation to the Suspected Immune-Related Genes of Silkworm
title_short The Effects of Destruxin A on Relish and Rel Gene Regulation to the Suspected Immune-Related Genes of Silkworm
title_sort effects of destruxin a on relish and rel gene regulation to the suspected immune-related genes of silkworm
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6155765/
https://www.ncbi.nlm.nih.gov/pubmed/28036076
http://dx.doi.org/10.3390/molecules22010041
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