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Silva RCP, da Silva RPC, Souto FO, de Lorena VMB, Aires ADL, Costa VMA, Albuquerque MCPDA, de Souza VMO. Extract from Ascaris suum and N-acetyl-L-cysteine induces an immunosuppressant effect in model of autoimmune hepatitis. Parasite Immunol 2021; 43:e12826. [PMID: 33586210 DOI: 10.1111/pim.12826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 01/27/2021] [Accepted: 02/10/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Extract of adult Ascaris suum (ASC) worms attenuated the liver damage in experimental autoimmune hepatitis (EAH) with induction of Th2 immune response, but fibrosis occurred. N-acetyl-L-cysteine (NAC) has protective effects against liver fibrosis. OBJECTIVES Evaluate the association ASC + NAC on the T- and B-cell activation, inflammation and fibrogenic markers in the liver in EAH. METHODS Experimental autoimmune hepatitis was induced intravenously with concanavalin A in BALB/c mice. EAH + ASC+NAC group received NAC and ASC; EAH + ASC group received ASC; EAH group received PBS. Doubly labelled CD4+ T (CD28, CTLA-4, CD40L or IL-10) and CD45R+ B lymphocytes (IL-10) and CD4+ CD25+ FoxP3+ cells were evaluated, along with gene expression of Col1a1, α-SMA, Fizz1, Arg1 and PPAR-γ and histomorphometry. RESULTS Experimental autoimmune hepatitis group showed high frequency of CD28+ and CD40L+ T lymphocytes, but not the EAH + ASC group. In relation to EAH group, the Fizz1 expression was lower in both groups treated, but Arg1 expression was lower in only EAH + ASC+NAC group. In the EAH + ASC+NAC group, there were higher frequencies of CD4+ IL-10+ and CD4+ CD25+ FoxP3+ cells, but not CD45R+ IL-10+ , along with mitigated inflammation and collagen production. CONCLUSIONS Ascaris suum favoured immunosuppression in EAH limiting the T cells activation. However, association ASC and NAC was necessary for attenuating the inflammatory process and collagen production.
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Affiliation(s)
- Roeckson Carlos Peixoto Silva
- Keizo Asami Immunopathology Laboratory (LIKA), Federal University of Pernambuco, Pernambuco, Brazil.,Department of Tropical Medicine, Federal University of Pernambuco, Pernambuco, Brazil
| | - Raul Penaforte Correia da Silva
- Keizo Asami Immunopathology Laboratory (LIKA), Federal University of Pernambuco, Pernambuco, Brazil.,Department of Tropical Medicine, Federal University of Pernambuco, Pernambuco, Brazil
| | - Fabrício Oliveira Souto
- Keizo Asami Immunopathology Laboratory (LIKA), Federal University of Pernambuco, Pernambuco, Brazil.,Agreste Academic Centre, Federal University of Pernambuco, Pernambuco, Brazil
| | | | - André de Lima Aires
- Keizo Asami Immunopathology Laboratory (LIKA), Federal University of Pernambuco, Pernambuco, Brazil.,Department of Tropical Medicine, Federal University of Pernambuco, Pernambuco, Brazil
| | - Vlaudia Maria Assis Costa
- Keizo Asami Immunopathology Laboratory (LIKA), Federal University of Pernambuco, Pernambuco, Brazil.,Department of Tropical Medicine, Federal University of Pernambuco, Pernambuco, Brazil
| | - Mônica Camelo Pessôa de Azevedo Albuquerque
- Keizo Asami Immunopathology Laboratory (LIKA), Federal University of Pernambuco, Pernambuco, Brazil.,Department of Tropical Medicine, Federal University of Pernambuco, Pernambuco, Brazil
| | - Valdênia Maria Oliveira de Souza
- Keizo Asami Immunopathology Laboratory (LIKA), Federal University of Pernambuco, Pernambuco, Brazil.,Department of Pharmaceutical Sciences, Federal University of Pernambuco, Pernambuco, Brazil
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