How Dopamine Influences Survival and Cellular Immune Response of <i>Rhipicephalus microplus</i> Inoculated with <i>Metarhizium anisopliae</i>

Dopamine (DA) is a biogenic monoamine reported to modulate insect hemocytes. Although the immune functions of DA are known in insects, there is a lack of knowledge of DA’s role in the immune system of ticks. The use of <i>Metarhizium anisopliae</i> has been considered for tick control, d...

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Autores principales: Thaís Almeida Corrêa, Jéssica Fiorotti, Emily Mesquita, Laura Nóbrega Meirelles, Mariana Guedes Camargo, Caio Junior Balduino Coutinho-Rodrigues, Allan Felipe Marciano, Vânia Rita Elias Pinheiro Bittencourt, Patrícia Silva Golo
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Publicado: MDPI AG 2021
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Acceso en línea:https://doaj.org/article/fac9101605ff43a599d823f25f3a1115
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spelling oai:doaj.org-article:fac9101605ff43a599d823f25f3a11152021-11-25T18:06:05ZHow Dopamine Influences Survival and Cellular Immune Response of <i>Rhipicephalus microplus</i> Inoculated with <i>Metarhizium anisopliae</i>10.3390/jof71109502309-608Xhttps://doaj.org/article/fac9101605ff43a599d823f25f3a11152021-11-01T00:00:00Zhttps://www.mdpi.com/2309-608X/7/11/950https://doaj.org/toc/2309-608XDopamine (DA) is a biogenic monoamine reported to modulate insect hemocytes. Although the immune functions of DA are known in insects, there is a lack of knowledge of DA’s role in the immune system of ticks. The use of <i>Metarhizium anisopliae</i> has been considered for tick control, driving studies on the immune response of these arthropods challenged with fungi. The present study evaluated the effect of DA on the cellular immune response and survival of <i>Rhipicephalus microplus</i> inoculated with <i>M. anisopliae</i> blastospores. Exogenous DA increased both ticks’ survival 72 h after <i>M. anisopliae</i> inoculation and the number of circulating hemocytes compared to the control group, 24 h after the treatment. The phagocytic index of tick hemocytes challenged with <i>M. anisopliae</i> did not change upon injection of exogenous DA. Phenoloxidase activity in the hemolymph of ticks injected with DA and the fungus or exclusively with DA was higher than in untreated ticks or ticks inoculated with the fungus alone, 72 h after treatment. DA was detected in the hemocytes of fungus-treated and untreated ticks. Unveiling the cellular immune response in ticks challenged with entomopathogenic fungi is important to improve strategies for the biological control of these ectoparasites.Thaís Almeida CorrêaJéssica FiorottiEmily MesquitaLaura Nóbrega MeirellesMariana Guedes CamargoCaio Junior Balduino Coutinho-RodriguesAllan Felipe MarcianoVânia Rita Elias Pinheiro BittencourtPatrícia Silva GoloMDPI AGarticlebiological controlentomopathogenic fungihemocytesticksphagocytic activityphenoloxidaseBiology (General)QH301-705.5ENJournal of Fungi, Vol 7, Iss 950, p 950 (2021)
institution DOAJ
collection DOAJ
language EN
topic biological control
entomopathogenic fungi
hemocytes
ticks
phagocytic activity
phenoloxidase
Biology (General)
QH301-705.5
spellingShingle biological control
entomopathogenic fungi
hemocytes
ticks
phagocytic activity
phenoloxidase
Biology (General)
QH301-705.5
Thaís Almeida Corrêa
Jéssica Fiorotti
Emily Mesquita
Laura Nóbrega Meirelles
Mariana Guedes Camargo
Caio Junior Balduino Coutinho-Rodrigues
Allan Felipe Marciano
Vânia Rita Elias Pinheiro Bittencourt
Patrícia Silva Golo
How Dopamine Influences Survival and Cellular Immune Response of <i>Rhipicephalus microplus</i> Inoculated with <i>Metarhizium anisopliae</i>
description Dopamine (DA) is a biogenic monoamine reported to modulate insect hemocytes. Although the immune functions of DA are known in insects, there is a lack of knowledge of DA’s role in the immune system of ticks. The use of <i>Metarhizium anisopliae</i> has been considered for tick control, driving studies on the immune response of these arthropods challenged with fungi. The present study evaluated the effect of DA on the cellular immune response and survival of <i>Rhipicephalus microplus</i> inoculated with <i>M. anisopliae</i> blastospores. Exogenous DA increased both ticks’ survival 72 h after <i>M. anisopliae</i> inoculation and the number of circulating hemocytes compared to the control group, 24 h after the treatment. The phagocytic index of tick hemocytes challenged with <i>M. anisopliae</i> did not change upon injection of exogenous DA. Phenoloxidase activity in the hemolymph of ticks injected with DA and the fungus or exclusively with DA was higher than in untreated ticks or ticks inoculated with the fungus alone, 72 h after treatment. DA was detected in the hemocytes of fungus-treated and untreated ticks. Unveiling the cellular immune response in ticks challenged with entomopathogenic fungi is important to improve strategies for the biological control of these ectoparasites.
format article
author Thaís Almeida Corrêa
Jéssica Fiorotti
Emily Mesquita
Laura Nóbrega Meirelles
Mariana Guedes Camargo
Caio Junior Balduino Coutinho-Rodrigues
Allan Felipe Marciano
Vânia Rita Elias Pinheiro Bittencourt
Patrícia Silva Golo
author_facet Thaís Almeida Corrêa
Jéssica Fiorotti
Emily Mesquita
Laura Nóbrega Meirelles
Mariana Guedes Camargo
Caio Junior Balduino Coutinho-Rodrigues
Allan Felipe Marciano
Vânia Rita Elias Pinheiro Bittencourt
Patrícia Silva Golo
author_sort Thaís Almeida Corrêa
title How Dopamine Influences Survival and Cellular Immune Response of <i>Rhipicephalus microplus</i> Inoculated with <i>Metarhizium anisopliae</i>
title_short How Dopamine Influences Survival and Cellular Immune Response of <i>Rhipicephalus microplus</i> Inoculated with <i>Metarhizium anisopliae</i>
title_full How Dopamine Influences Survival and Cellular Immune Response of <i>Rhipicephalus microplus</i> Inoculated with <i>Metarhizium anisopliae</i>
title_fullStr How Dopamine Influences Survival and Cellular Immune Response of <i>Rhipicephalus microplus</i> Inoculated with <i>Metarhizium anisopliae</i>
title_full_unstemmed How Dopamine Influences Survival and Cellular Immune Response of <i>Rhipicephalus microplus</i> Inoculated with <i>Metarhizium anisopliae</i>
title_sort how dopamine influences survival and cellular immune response of <i>rhipicephalus microplus</i> inoculated with <i>metarhizium anisopliae</i>
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/fac9101605ff43a599d823f25f3a1115
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