Utilize este identificador para referenciar este registo: http://hdl.handle.net/10451/11467
Título: Enteric mucosa integrity in the presence of a preserved innate interleukin 22 compartment in HIV type 1-treated individuals.
Autor: Fernandes, Susana M.
Pires, Ana R.
Ferreira, Cristina
Foxall, Russell B.
Rino, José
Santos, Carla
Correia, Luís
Poças, José
Veiga-Fernandes, Henrique
Sousa, Ana E.
Palavras-chave: Gut Associated Lymphoid Tissue
Mucosa Reconstitution
Antiretroviral Therapy
Data: 2014
Editora: Oxford University Press
Citação: Mucosal IL-22 in HIV-1 Infection • JID •
Resumo: Interleukin 22 (IL-22) is emerging as a key cytokine for gut epithelial homeostasis and mucosal repair. Gut disruption is a hallmark of human immunodeficiency virus (HIV) infection. Here, we investigated IL-22 production and gut mucosal integrity in HIV type 1 (HIV-1)-infected individuals receiving long-term antiretroviral therapy (ART).Methods. Biopsy specimens from 37 individuals who underwent colonoscopy primarily for cancer screening and from 17 HIV-1-infected and 20 healthy age-matched controls were assessed.Results. We found significant depletion of sigmoid IL-22-producing CD4+ T cells (T-helper type 22 [Th22] cells) even after prolonged ART, contrasting with the apparently normal compartments of regulatory and interleukin 17 (IL-17)-producing CD4+ T cells, as well as total mucosal CD4+ T cells. Despite the preferential Th22 cell depletion, IL-22 production by innate lymphoid cells (ILCs) was similar to that observed in HIV-1-seronegative subjects, and transcription of genes encoding molecules relevant for IL-22 production (ie, AHR, IL23, IL23R, IL1B, IL6, and TGFB1) was preserved. Remarkably, levels of transcripts of IL-22-target genes (ie, REG3G, DEFB4A, S100A9, MUC1, and MUC13) were unaltered, suggesting an adequate production of antimicrobial peptides and mucins. In agreement, enteric epithelial architecture was fully preserved.Conclusions. Despite the reduced Th22 cell subset, innate IL-22-mediated mechanisms, essential for sigmoid mucosa integrity, were fully operational in long-term-treated HIV-1-infected individuals. Our data highlight IL-22 production by ILCs as an important target for therapies aimed at facilitating human mucosal reconstitution.
Descrição: © The Author 2014. Published by Oxford University Press on behalf of the Infectious Diseases Society of America. All rights reserved.
Peer review: yes
URI: http://hdl.handle.net/10451/11467
DOI: http://dx.doi.org/10.1093/infdis/jiu126
ISSN: 0022-1899
Aparece nas colecções:FM-LIC - Artigos em Revistas Internacionais
IMM - Artigos em Revistas Internacionais

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