In vivo effects of the NLRP1/NLRP3 inflammasome pathway on latent respiratory virus infection.
Int J Mol Med
; 41(6): 3620-3628, 2018 Jun.
Article
em En
| MEDLINE
| ID: mdl-29512688
ABSTRACT
The present study aimed to investigate the effects of nucleotide-binding domain leucine-rich repeat protein (NLRP)1/NLRP3 inflammasome pathways on latent viral infection of the respiratory tract. A total of 55 BALB/c mice were assigned to the control, bleomycin (BLM)treated, murine cytomegalovirus (MCMV), MCMV+BLM and MCMV+BLM+CD4+ Tcell groups. The viral loads were detected in the salivary glands, kidney, liver and lung tissues via polymerase chain reaction (PCR). The weight, lung coefficient and hydroxyproline (HYP) were detected. HE and Masson staining were performed to score for alveolitis and degree of pulmonary fibrosis. Reverse transcriptionquantitative PCR and western blot were applied to assess the expression levels of the NLRP inflammasome components caspase1, interleukin (IL)1ß and IL18. ELISA was used to evaluate the expression levels of caspase1, tumor necrosis factor (TNF)α, IL1ß and IL18. The weight of the mice decreased, and the lung coefficient and HYP content increased in the BLM, MCMV, MCMV+BLM and MCMV+BLM+CD4+ Tcell groups compared with those in the control group. Compared with the control group, mice in the BLM, MCMV+BLM and MCMV+BLM+CD4+ Tcell groups had obviously increased alveolitis and degrees of pulmonary fibrosis, increased mRNA expression levels of caspase1, IL1ß and IL18, and increased protein expression levels of caspase1(p20), mature IL1ß and mature IL18. The values in the MCMV+BLM group were also higher than those in the BLM group and those in the MCMV+BLM+CD4+ Tcell group. The serum levels of caspase1, TNFα, IL1ß and IL18 in the serum of mice in the MCMV+BLM group were significantly higher than those in the BLM group. Compared with the MCMV+BLM group, the MCMV+BLM+CD4+ Tcell group had decreased levels of caspase1, TNFα, IL1ß and IL18 (all P<0.05). These results demonstrated that the activation of the NLRP1 and NLRP3 inflammasome pathways may contribute to pulmonary fibrosis caused by latent MCMV infection in mice.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Muromegalovirus
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Proteínas Adaptadoras de Transdução de Sinal
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Proteínas Reguladoras de Apoptose
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Proteína 3 que Contém Domínio de Pirina da Família NLR
Limite:
Animals
Idioma:
En
Revista:
Int J Mol Med
Assunto da revista:
BIOLOGIA MOLECULAR
/
GENETICA MEDICA
Ano de publicação:
2018
Tipo de documento:
Article