Fcγ receptors on aging neutrophils
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of applied oral science (Online) |
Texto Completo: | https://www.revistas.usp.br/jaos/article/view/187217 |
Resumo: | Objective: Neutrophils are key effector cells of the innate immune system. They recognize antigens through membrane receptors, which are expressed during their maturation and activation. Neutrophils express FcγRII (CD32), FcγRIII (CD16), and FcγRI (CD64) after being activated by different factors such as cytokines and bacterial products. These receptors are involved with phagocytosis of IgG-opsonized microbes and enhance defense mechanisms. Based on that, our study seeks to compare the expression of FcγRII, FcγRIII, FcγRI, and CD11b on neutrophils from elderly and young subjects and their expression after in vitro activation with cytokines and LPS. Methodology: Neutrophils were isolated from human peripheral blood and from mice bone marrow by density gradient. After isolation, FCγRs expression was immediately analyzed by flow cytometry or after in vitro stimulation. Results: In freshly isolated cells, the percentage of FcγRIIIb+ and CD11b+ neutrophils were higher in samples from young individuals; FcγRIIIa expression was more prominent on aged neutrophils; FcγRIA expression was similar in all samples analyzed. Exposure to CXCL8 and LPS resulted in a higher percentage of FcγRIa+ neutrophils on elderly individuals’ samples but lower when compared with neutrophils from young donors. We observed that LPS caused an increase in FcγRIIa expression on aging human neutrophils. In contrast, FcγRIIIb expression in response to CXCL8 and LPS stimulation was not altered in the four groups. CD11b expression was lower in neutrophils from elderly individuals even in response to LPS and CXCL8. In mice, we observed differences only regarding CD11b expression, which was increased on aged neutrophils. LPS exposure caused an increase in all FcγRs. Conclusions: Our results suggest that, in humans, the overall pattern of FcγR expression and integrin CD11b are altered during aging and immunosenescence might contribute to age-related infection. |
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Journal of applied oral science (Online) |
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Fcγ receptors on aging neutrophilsReceptorsIgGNeutrophilsAgingObjective: Neutrophils are key effector cells of the innate immune system. They recognize antigens through membrane receptors, which are expressed during their maturation and activation. Neutrophils express FcγRII (CD32), FcγRIII (CD16), and FcγRI (CD64) after being activated by different factors such as cytokines and bacterial products. These receptors are involved with phagocytosis of IgG-opsonized microbes and enhance defense mechanisms. Based on that, our study seeks to compare the expression of FcγRII, FcγRIII, FcγRI, and CD11b on neutrophils from elderly and young subjects and their expression after in vitro activation with cytokines and LPS. Methodology: Neutrophils were isolated from human peripheral blood and from mice bone marrow by density gradient. After isolation, FCγRs expression was immediately analyzed by flow cytometry or after in vitro stimulation. Results: In freshly isolated cells, the percentage of FcγRIIIb+ and CD11b+ neutrophils were higher in samples from young individuals; FcγRIIIa expression was more prominent on aged neutrophils; FcγRIA expression was similar in all samples analyzed. Exposure to CXCL8 and LPS resulted in a higher percentage of FcγRIa+ neutrophils on elderly individuals’ samples but lower when compared with neutrophils from young donors. We observed that LPS caused an increase in FcγRIIa expression on aging human neutrophils. In contrast, FcγRIIIb expression in response to CXCL8 and LPS stimulation was not altered in the four groups. CD11b expression was lower in neutrophils from elderly individuals even in response to LPS and CXCL8. In mice, we observed differences only regarding CD11b expression, which was increased on aged neutrophils. LPS exposure caused an increase in all FcγRs. Conclusions: Our results suggest that, in humans, the overall pattern of FcγR expression and integrin CD11b are altered during aging and immunosenescence might contribute to age-related infection.Universidade de São Paulo. Faculdade de Odontologia de Bauru2021-06-14info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/jaos/article/view/18721710.1590/1678-7757-2020-0770Journal of Applied Oral Science; Vol. 29 (2021); e20200770Journal of Applied Oral Science; Vol. 29 (2021); e20200770Journal of Applied Oral Science; v. 29 (2021); e202007701678-77651678-7757reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/jaos/article/view/187217/173032Copyright (c) 2021 Journal of Applied Oral Sciencehttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessGasparoto, Thaís Helena Dalboni, Thalita Marcato Amôr, Nádia Ghinelli Abe, Aneli Eiko Perri, Graziela Lara, Vanessa Soares Vieira, Narciso Almeida Gasparoto, Carlos Teodoro Campanelli, Ana Paula 2021-06-14T22:40:45Zoai:revistas.usp.br:article/187217Revistahttp://www.scielo.br/jaosPUBhttps://www.revistas.usp.br/jaos/oai||jaos@usp.br1678-77651678-7757opendoar:2021-06-14T22:40:45Journal of applied oral science (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Fcγ receptors on aging neutrophils |
title |
Fcγ receptors on aging neutrophils |
spellingShingle |
Fcγ receptors on aging neutrophils Gasparoto, Thaís Helena Receptors IgG Neutrophils Aging |
title_short |
Fcγ receptors on aging neutrophils |
title_full |
Fcγ receptors on aging neutrophils |
title_fullStr |
Fcγ receptors on aging neutrophils |
title_full_unstemmed |
Fcγ receptors on aging neutrophils |
title_sort |
Fcγ receptors on aging neutrophils |
author |
Gasparoto, Thaís Helena |
author_facet |
Gasparoto, Thaís Helena Dalboni, Thalita Marcato Amôr, Nádia Ghinelli Abe, Aneli Eiko Perri, Graziela Lara, Vanessa Soares Vieira, Narciso Almeida Gasparoto, Carlos Teodoro Campanelli, Ana Paula |
author_role |
author |
author2 |
Dalboni, Thalita Marcato Amôr, Nádia Ghinelli Abe, Aneli Eiko Perri, Graziela Lara, Vanessa Soares Vieira, Narciso Almeida Gasparoto, Carlos Teodoro Campanelli, Ana Paula |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Gasparoto, Thaís Helena Dalboni, Thalita Marcato Amôr, Nádia Ghinelli Abe, Aneli Eiko Perri, Graziela Lara, Vanessa Soares Vieira, Narciso Almeida Gasparoto, Carlos Teodoro Campanelli, Ana Paula |
dc.subject.por.fl_str_mv |
Receptors IgG Neutrophils Aging |
topic |
Receptors IgG Neutrophils Aging |
description |
Objective: Neutrophils are key effector cells of the innate immune system. They recognize antigens through membrane receptors, which are expressed during their maturation and activation. Neutrophils express FcγRII (CD32), FcγRIII (CD16), and FcγRI (CD64) after being activated by different factors such as cytokines and bacterial products. These receptors are involved with phagocytosis of IgG-opsonized microbes and enhance defense mechanisms. Based on that, our study seeks to compare the expression of FcγRII, FcγRIII, FcγRI, and CD11b on neutrophils from elderly and young subjects and their expression after in vitro activation with cytokines and LPS. Methodology: Neutrophils were isolated from human peripheral blood and from mice bone marrow by density gradient. After isolation, FCγRs expression was immediately analyzed by flow cytometry or after in vitro stimulation. Results: In freshly isolated cells, the percentage of FcγRIIIb+ and CD11b+ neutrophils were higher in samples from young individuals; FcγRIIIa expression was more prominent on aged neutrophils; FcγRIA expression was similar in all samples analyzed. Exposure to CXCL8 and LPS resulted in a higher percentage of FcγRIa+ neutrophils on elderly individuals’ samples but lower when compared with neutrophils from young donors. We observed that LPS caused an increase in FcγRIIa expression on aging human neutrophils. In contrast, FcγRIIIb expression in response to CXCL8 and LPS stimulation was not altered in the four groups. CD11b expression was lower in neutrophils from elderly individuals even in response to LPS and CXCL8. In mice, we observed differences only regarding CD11b expression, which was increased on aged neutrophils. LPS exposure caused an increase in all FcγRs. Conclusions: Our results suggest that, in humans, the overall pattern of FcγR expression and integrin CD11b are altered during aging and immunosenescence might contribute to age-related infection. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-14 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/jaos/article/view/187217 10.1590/1678-7757-2020-0770 |
url |
https://www.revistas.usp.br/jaos/article/view/187217 |
identifier_str_mv |
10.1590/1678-7757-2020-0770 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/jaos/article/view/187217/173032 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2021 Journal of Applied Oral Science http://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2021 Journal of Applied Oral Science http://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Odontologia de Bauru |
publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Odontologia de Bauru |
dc.source.none.fl_str_mv |
Journal of Applied Oral Science; Vol. 29 (2021); e20200770 Journal of Applied Oral Science; Vol. 29 (2021); e20200770 Journal of Applied Oral Science; v. 29 (2021); e20200770 1678-7765 1678-7757 reponame:Journal of applied oral science (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Journal of applied oral science (Online) |
collection |
Journal of applied oral science (Online) |
repository.name.fl_str_mv |
Journal of applied oral science (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
||jaos@usp.br |
_version_ |
1800221681264885760 |