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Bala S, Csak T, Kodys K, Catalano D, Ambade A, Furi I, Lowe P, Cho Y, Iracheta-Vellve A, Szabo G. Alcohol-induced miR-155 and HDAC11 inhibit negative regulators of the TLR4 pathway and lead to increased LPS responsiveness of Kupffer cells in alcoholic liver disease. J Leukoc Biol 2017; 102:487-498. [PMID: 28584078 PMCID: PMC6608073 DOI: 10.1189/jlb.3a0716-310r] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 04/11/2017] [Accepted: 05/04/2017] [Indexed: 12/13/2022] Open
Abstract
Inflammation promotes the progression of alcoholic liver disease. Alcohol sensitizes KCs to gut-derived endotoxin (LPS); however, signaling pathways that perpetuate inflammation in alcoholic liver disease are only partially understood. We found that chronic alcohol feeding in mice induced miR-155, an inflammatory miRNA in isolated KCs. We hypothesized that miR-155 might increase the responsiveness of KCs to LPS via targeting the negative regulators of LPS signaling. Our results revealed that KCs that were isolated from alcohol-fed mice showed a decrease in IRAK-M, SHIP1, and PU.1, and an increase in TNF-α levels. This was specific to KCs, as no significant differences were observed in these genes in hepatocytes. We found a causal effect of miR-155 deficiency on LPS responsiveness, as KCs that were isolated from miR-155 KO mice showed a greater induction of IRAK-M, SHIP1, and suppressor of cytokine signaling 1 after LPS treatment. C/EBPβ, a validated miR-155 target, stimulates IL-10 transcription. We found a higher induction of C/EBPβ and IL-10 in KCs that were isolated from miR-155 KO mice after LPS treatment. Gain- and loss-of-function studies affirmed that alcohol-induced miR-155 directly regulates IRAK-M, SHIP1, suppressor of cytokine signaling 1, and C/EBPβ, as miR-155 inhibition increased and miR-155 overexpression decreased these genes in LPS or alcohol-pretreated wild-type KCs. HDAC11, a regulator of IL-10, was significantly increased and IL-10 was decreased in KCs that were isolated from alcohol-fed mice. Functionally, knockdown of HDAC11 with small interfering RNA resulted in an IL-10 increase in LPS or alcohol-pretreated Mϕ. We found that acetaldehyde and NF-κB pathways regulate HDAC11 levels. Collectively, our results indicate that the alcohol-induced responsiveness of KCs to LPS, in part, is governed by miR-155 and HDAC11.
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Affiliation(s)
- Shashi Bala
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Timea Csak
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Karen Kodys
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Donna Catalano
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Aditya Ambade
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Istvan Furi
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Patrick Lowe
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Yeonhee Cho
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Arvin Iracheta-Vellve
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Gyongyi Szabo
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
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Abstract
The objectives of this chapter are to provide a brief understanding of the following:Clinical evaluation of infectious diseases and altered immune disorders, including physical examination and laboratory studies Various infectious disease processes, including etiology, pathogenesis, clinical presentation, and management Commonly encountered altered immune disorders, including etiology, clinical presentation, and management Precautions and guidelines that a physical therapist should implement when treating a patient with an infectious disease process or altered immunity
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Ngu JH, Gearry RB, Frampton CM, Stedman CAM. Autoimmune hepatitis: the role of environmental risk factors: a population-based study. Hepatol Int 2013. [PMID: 26201924 DOI: 10.1007/s12072-013-9448-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
PURPOSE The etiology of autoimmune hepatitis (AIH) likely involves a complex interaction of genetic and environmental factors. We aim to investigate the associations between exposure to putative environmental factors and AIH and to quantify AIH risk in a first-degree relative. METHODS We conducted a population-based case-control study. Cases were AIH patients who were alive and resided in Canterbury, New Zealand, between 1 July 2011 and 30 June 2012. Controls were randomly selected from the Electoral Roll and were matched 2:1 to each case by age and gender. Self-reporting questionnaires that cover lifestyle factors, childhood factors and family history were used. RESULTS 72 AIH cases and 144 controls were included. We found that exposure to antibiotics within 12 months prior to AIH diagnosis (OR 12.98, 95 % CI 2.49-67.67, p < 0.01) was an independent risk factor for the development of AIH. Alcohol consumption (OR 0.43, 95 % CI 0.28-0.68, p < 0.01) and childhood home with wood heating (OR 0.30, 95 % CI 0.14-0.63, p < 0.01) were independently associated with reduced risks of later development of AIH. The crude risk of AIH in first-degree relatives of a patient with AIH was 0.2 % (95 % CI <0.1-2.0). CONCLUSIONS We found that antibiotics are an independent risk factor for the development of AIH, whereas alcohol consumption and living in a childhood home with wood heating are independent protective factors against the later development of AIH.
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Affiliation(s)
- Jing H Ngu
- University of Otago, Christchurch, Canterbury, New Zealand. .,Department of Gastroenterology, Christchurch Hospital, Private Bag 4710, Christchurch, New Zealand.
| | - Richard B Gearry
- University of Otago, Christchurch, Canterbury, New Zealand. .,Department of Gastroenterology, Christchurch Hospital, Private Bag 4710, Christchurch, New Zealand.
| | | | - Catherine A M Stedman
- University of Otago, Christchurch, Canterbury, New Zealand. .,Department of Gastroenterology, Christchurch Hospital, Private Bag 4710, Christchurch, New Zealand.
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Darvin M, Sterry W, Lademann J, Patzelt A. Alcohol Consumption Decreases the Protection Efficiency of the Antioxidant Network and Increases the Risk of Sunburn in Human Skin. Skin Pharmacol Physiol 2013; 26:45-51. [DOI: 10.1159/000343908] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Accepted: 09/26/2012] [Indexed: 12/23/2022]
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Roseman C, Truedsson L, Kapetanovic MC. The effect of smoking and alcohol consumption on markers of systemic inflammation, immunoglobulin levels and immune response following pneumococcal vaccination in patients with arthritis. Arthritis Res Ther 2012; 14:R170. [PMID: 22824238 PMCID: PMC3580564 DOI: 10.1186/ar3923] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 07/23/2012] [Indexed: 01/14/2023] Open
Abstract
Introduction The purpose of this research was to study the influence of cigarette smoking and alcohol consumption on immune response to heptavalent pneumococcal conjugate vaccine, immunoglobulin levels (Ig) and markers of systemic inflammation in patients with rheumatoid arthritis (RA) or spondylarthropathy (SpA). Methods In total, 505 patients were vaccinated. Six pre-specified groups were enrolled: RA on methotrexate (MTX) treatment in some cases other disease-modifying antirheumatic drugs (DMARDs) (I); RA on anti-tumour necrosis factor (TNF) as monotherapy (II); RA on anti-TNF+MTX+ possibly other DMARDs (III); SpA on anti-TNF as monotherapy (IV); SpA on anti-TNF+MTX+ possibly other DMARDs (V); and SpA on nonsteroidal anti-inflammatory drugs (NSAIDs) and/or analgesics (VI). Smoking (pack-years) and alcohol consumption (g/week) were calculated from patient questionnaires. Ig, C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) were determined at vaccination. IgG antibodies against serotypes 23F and 6B were measured at vaccination and after four to six weeks using standard ELISA. Immune response (ratio between post- and pre-vaccination antibodies; immune response (IR)) and positive immune response (≥2-fold increase in pre-vaccination antibodies; posIR) were calculated. Results Eighty-eight patients (17.4%) were current smokers. Smokers had higher CRP and ESR, lower IgG and lower IR for both serotypes (P between 0.012 and 0.045). RA patients on MTX who smoked ≥1pack-year had lower posIR for both serotypes (P = 0.021; OR 0.29; CI 0.1 to 0.7) compared to never-smokers. Alcohol consumption was associated with lower CRP (P = 0.05) and ESR (P = 0.003) but did not influence IR or Ig levels. Conclusion Smoking predicted impaired immune response to pneumococcal conjugate vaccine in RA patients on MTX. Smokers with arthritis had higher inflammatory markers and lower IgG regardless of diagnosis and treatment. Low to moderate alcohol consumption was related to lower levels of inflammation markers but had no impact on immune response. Trial registration EudraCT EU 2007-006539-29 and NCT00828997
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