The Interaction of the S100A8/A9 Protein With the Innate Immune System in the Immunopathology of Acute and Chronic Liver Disease
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 100
- 试验地点
- 1
- 主要终点
- Concentration of plasma S100A8/A9
研究概览
简要总结
This observational study evaluates the concentration of immune protein S100A8/A9 in different liver failure syndromes, its interaction with the immune system and validity as an immunotherapeutic target to improve survival in patients with advanced cirrhosis and/or acute on chronic liver failure.
详细描述
A paradox exists in chronic liver disease whereby there is a general recognition that chronic inflammation is part of the pathophysiology, heightened when there is an acute deterioration and organ failure (acute-on-chronic liver failure), yet there is an increased susceptibility to infection due to a dysfunctional immune system, which is often the trigger for organ failure and the reason for death in these patients.
A danger signal reported in other inflammatory conditions called S100A8/A9 (calprotectin) is known to activate the immune system by production of pro-inflammatory cytokines but has also been observed to promote the development immunosuppressive signals (e.g. IL-10 and MDSCs).
In an attempt to explain this paradox in liver disease, this study proposes to identify at the cellular and molecular level, the triggers for S100A8/A9 production, how it varies with time in stable patients and those that have acute deteriorations including the development of organ failure, and its interaction with innate immune cells in the circulation and at tissue level.
By studying this, the Investigators hope to be able to identify immunotherapeutic targets and understand whether potential immunotherapy could be applied locally or systemically. The Investigators' observations in this study could provide the basis for the future development of clinical immunomodulating agents, which may ameliorate immunopathology, reduce susceptibility to infection and could reduce mortality in critically ill patients with liver disease. Findings in this study may also have more generalizable impact especially with the recent recognition in the COVID-19 pandemic that immunomodulatory therapies may improve the clinical outcomes of inflammatory phenotypes in virus-induced severe sepsis.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 80 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •A) Patients with acute or chronic liver disease:
- •Presence of chronic liver disease, or cirrhosis due to any aetiology (latter based upon a histopathological diagnosis or compatible laboratory data and radiological findings)
- •Acute alcoholic hepatitis (definition as per Crabb et al, 2016)35
- •Acute liver failure due to any aetiology
- •Acute-on-chronic liver failure (defined as per EASL-CLIF definition)17
- •B) Patients undergoing diagnostic or therapeutic abdominal paracentesis Patients with acute or chronic liver disease of any aetiology undergoing clinically-indicated paracentesis for ascites
- •C) Patients undergoing broncho-alveolar lavage
- •Intubated patients with liver disease in intensive care
- •Undergoing a bronchoscopy or a non-directed broncho-alveolar lavage as part of their routine clinical care
- •D) Patients with acute or chronic liver disease undergoing liver biopsy (percutaneous or transjugular) as routine part of their clinical care
- •E) Patients with portal hypertension (cirrhotic or non-cirrhotic) undergoing transjugular intrahepatic shunt (TIPSS) placement as part of their routine care
- •F) Patients with acute or chronic liver disease undergoing orthoptic liver transplantation
- •G) Patients undergoing surgical liver resection or hepatectomy for liver-related diseases
- •Control groups:
- •A) Patients with ascites without chronic liver disease:
- •Absence of cirrhosis based on clinical, radiological or histopathological features, including patients with non-cirrhotic portal hypertension, cardiac ascites (ascites due to heart failure) or patients with chronic kidney disease undergoing continuous ambulatory peritoneal dialysis (CAPD)
- •Presence of clinically significant ascites
- •Undergoing diagnostic or therapeutic paracentesis
- •B) Patients with sepsis without acute or chronic liver disease
- •C) Patients with haemochromatosis without liver disease or end-organ damage who undergo regular venesection
- •D) Healthy subjects
排除标准
- •Age under 18 or over 80 Evidence of disseminated malignancy (isolated cancers including hepatocellular carcinoma are not an exclusion criteria) Patients with known immunodeficiency syndromes (e.g. HIV infection)
结局指标
主要结局
Concentration of plasma S100A8/A9
时间窗: 1 years
The study will evaluate whether S100A8/A9 concentration can be used to predict clinical outcomes, such as mortality, the development of infection and/or organ failure. In the laboratory, it will evaluate the effect S100A8/A9 has on immune functional readouts including phagocytosis, oxidative burst and cytokine production, all of which are required for an effect immune response. Similarly, by blocking its action, the study will identify whether this is a potential immunotherapeutic strategy to improve the outcome of patients with high concentrations of the protein.
次要结局
- Mortality(1 years)
- Development of infection(1 years)