Mechanisms of Inflammatory Liver Injury

This study has been completed.
Sponsor:
Information provided by:
National Institute of Environmental Health Sciences (NIEHS)
ClinicalTrials.gov Identifier:
NCT00011284
First received: February 15, 2001
Last updated: June 23, 2005
Last verified: September 2002
  Purpose

White blood cells can cause liver damage if they inappropriately accumulate in the liver in large numbers. Such an event can occur if an individual's blood is exposed to endotoxin, a substance released from the cell walls of many species of bacteria. The purpose of this study is to isolate neutrophils, an important white blood cell, from the blood of normal volunteers, and put them in tissue culture with isolated liver cells. The experiments will determine how endotoxin can increase the ability of neutrophils to damage liver cells. All studies supported by this grant will be done with isolated cells in tissue culture. This experimental model will reveal possible mechanisms that can in the future be evaluated in human diseases such as bacterial sepsis.


Condition
Liver Diseases

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Cross-Sectional

Resource links provided by NLM:


Further study details as provided by National Institute of Environmental Health Sciences (NIEHS):

Estimated Enrollment: 50
Estimated Study Completion Date: November 2001
Detailed Description:

Neutrophils will be isolated from normal human volunteers and placed in cell culture with isolated hepatocytes or C3A cells (hepatoblastoma cell line that exhibit many characteristics of normal hepatocytes). These experiments will evaluate the mechanisms by which neutrophil adhere to the surface of hepatocytes, and the mechanisms by which the attached neutrophils can damage or kill the hepatocytes. Mechanisms of adhesion will involve understanding of the chemokines released by the hepatocytes that stimulate neutrophil adhesiveness, the cytokines that activate hepatocytes to express chemokines and adhesion molecules, the adhesion receptors on the neutrophil surface that are able to recognize the adhesion molecules on the hepatocyte surface, and the ability of adhesion to enhance and focus cytotoxic chemicals coming from the stimulated neutrophils. In addition, the role endotoxin can play in these sequence of events is being studies, and the specific cytotoxic mechanisms released by the neutrophils are under study. As noted in the brief summary, this grant only supports use of human cells in vitro (i.e., all experiments will be done in tissue culture). The purpose of working with this experimental model is to define what mechanisms should in future experiments be evaluated in patients with endotoxin induced disease.

  Eligibility

Ages Eligible for Study:   21 Years to 65 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Only blood from normal subjects will be used in the in vitro experiments.

  Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00011284

Locations
United States, Texas
Baylor College of Medicine
Houston, Texas, United States, 77030
Sponsors and Collaborators
  More Information

No publications provided

ClinicalTrials.gov Identifier: NCT00011284     History of Changes
Other Study ID Numbers: 6091-CP-001
Study First Received: February 15, 2001
Last Updated: June 23, 2005
Health Authority: United States: Federal Government

Keywords provided by National Institute of Environmental Health Sciences (NIEHS):
Liver
Inflammation
Endotoxin
Neutrophils
Hepatocytes

Additional relevant MeSH terms:
Liver Diseases
Digestive System Diseases

ClinicalTrials.gov processed this record on August 21, 2014