Humanized HLA-DR4 mice fed with the protozoan pathogen of oysters Perkinsus marinus (Dermo) do not develop noticeable pathology but elicit systemic immunity.

Perkinsus marinus (Phylum Perkinsozoa) is a marine protozoan parasite responsible for "Dermo" disease in oysters, which has caused extensive damage to the shellfish industry and estuarine environment. The infection prevalence has been estimated in some areas to be as high as 100%, often ca...

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Autores principales:	Wathsala Wijayalath, Sai Majji, Yuliya Kleschenko, Luis Pow-Sang, Teodor D Brumeanu, Eileen Franke Villasante, Gerardo R Vasta, José-Antonio Fernández-Robledo, Sofia Casares
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/04458b139a4e44bd892b68423ac8193c
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spelling	oai:doaj.org-article:04458b139a4e44bd892b68423ac8193c2021-11-18T08:34:33ZHumanized HLA-DR4 mice fed with the protozoan pathogen of oysters Perkinsus marinus (Dermo) do not develop noticeable pathology but elicit systemic immunity.1932-620310.1371/journal.pone.0087435https://doaj.org/article/04458b139a4e44bd892b68423ac8193c2014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24498105/?tool=EBIhttps://doaj.org/toc/1932-6203Perkinsus marinus (Phylum Perkinsozoa) is a marine protozoan parasite responsible for "Dermo" disease in oysters, which has caused extensive damage to the shellfish industry and estuarine environment. The infection prevalence has been estimated in some areas to be as high as 100%, often causing death of infected oysters within 1-2 years post-infection. Human consumption of the parasites via infected oysters is thus likely to occur, but to our knowledge the effect of oral consumption of P. marinus has not been investigated in humans or other mammals. To address the question we used humanized mice expressing HLA-DR4 molecules and lacking expression of mouse MHC-class II molecules (DR4.EA(0)) in such a way that CD4 T cell responses are solely restricted by the human HLA-DR4 molecule. The DR4.EA(0) mice did not develop diarrhea or any detectable pathology in the gastrointestinal tract or lungs following single or repeated feedings with live P. marinus parasites. Furthermore, lymphocyte populations in the gut associated lymphoid tissue and spleen were unaltered in the parasite-fed mice ruling out local or systemic inflammation. Notably, naïve DR4.EA(0) mice had antibodies (IgM and IgG) reacting against P. marinus parasites whereas parasite specific T cell responses were undetectable. Feeding with P. marinus boosted the antibody responses and stimulated specific cellular (IFNγ) immunity to the oyster parasite. Our data indicate the ability of P. marinus parasites to induce systemic immunity in DR4.EA(0) mice without causing noticeable pathology, and support rationale grounds for using genetically engineered P. marinus as a new oral vaccine platform to induce systemic immunity against infectious agents.Wathsala WijayalathSai MajjiYuliya KleschenkoLuis Pow-SangTeodor D BrumeanuEileen Franke VillasanteGerardo R VastaJosé-Antonio Fernández-RobledoSofia CasaresPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 1, p e87435 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Wathsala Wijayalath Sai Majji Yuliya Kleschenko Luis Pow-Sang Teodor D Brumeanu Eileen Franke Villasante Gerardo R Vasta José-Antonio Fernández-Robledo Sofia Casares Humanized HLA-DR4 mice fed with the protozoan pathogen of oysters Perkinsus marinus (Dermo) do not develop noticeable pathology but elicit systemic immunity.
description	Perkinsus marinus (Phylum Perkinsozoa) is a marine protozoan parasite responsible for "Dermo" disease in oysters, which has caused extensive damage to the shellfish industry and estuarine environment. The infection prevalence has been estimated in some areas to be as high as 100%, often causing death of infected oysters within 1-2 years post-infection. Human consumption of the parasites via infected oysters is thus likely to occur, but to our knowledge the effect of oral consumption of P. marinus has not been investigated in humans or other mammals. To address the question we used humanized mice expressing HLA-DR4 molecules and lacking expression of mouse MHC-class II molecules (DR4.EA(0)) in such a way that CD4 T cell responses are solely restricted by the human HLA-DR4 molecule. The DR4.EA(0) mice did not develop diarrhea or any detectable pathology in the gastrointestinal tract or lungs following single or repeated feedings with live P. marinus parasites. Furthermore, lymphocyte populations in the gut associated lymphoid tissue and spleen were unaltered in the parasite-fed mice ruling out local or systemic inflammation. Notably, naïve DR4.EA(0) mice had antibodies (IgM and IgG) reacting against P. marinus parasites whereas parasite specific T cell responses were undetectable. Feeding with P. marinus boosted the antibody responses and stimulated specific cellular (IFNγ) immunity to the oyster parasite. Our data indicate the ability of P. marinus parasites to induce systemic immunity in DR4.EA(0) mice without causing noticeable pathology, and support rationale grounds for using genetically engineered P. marinus as a new oral vaccine platform to induce systemic immunity against infectious agents.
format	article
author	Wathsala Wijayalath Sai Majji Yuliya Kleschenko Luis Pow-Sang Teodor D Brumeanu Eileen Franke Villasante Gerardo R Vasta José-Antonio Fernández-Robledo Sofia Casares
author_facet	Wathsala Wijayalath Sai Majji Yuliya Kleschenko Luis Pow-Sang Teodor D Brumeanu Eileen Franke Villasante Gerardo R Vasta José-Antonio Fernández-Robledo Sofia Casares
author_sort	Wathsala Wijayalath
title	Humanized HLA-DR4 mice fed with the protozoan pathogen of oysters Perkinsus marinus (Dermo) do not develop noticeable pathology but elicit systemic immunity.
title_short	Humanized HLA-DR4 mice fed with the protozoan pathogen of oysters Perkinsus marinus (Dermo) do not develop noticeable pathology but elicit systemic immunity.
title_full	Humanized HLA-DR4 mice fed with the protozoan pathogen of oysters Perkinsus marinus (Dermo) do not develop noticeable pathology but elicit systemic immunity.
title_fullStr	Humanized HLA-DR4 mice fed with the protozoan pathogen of oysters Perkinsus marinus (Dermo) do not develop noticeable pathology but elicit systemic immunity.
title_full_unstemmed	Humanized HLA-DR4 mice fed with the protozoan pathogen of oysters Perkinsus marinus (Dermo) do not develop noticeable pathology but elicit systemic immunity.
title_sort	humanized hla-dr4 mice fed with the protozoan pathogen of oysters perkinsus marinus (dermo) do not develop noticeable pathology but elicit systemic immunity.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/04458b139a4e44bd892b68423ac8193c
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Humanized HLA-DR4 mice fed with the protozoan pathogen of oysters Perkinsus marinus (Dermo) do not develop noticeable pathology but elicit systemic immunity.

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