Malondialdehyde-acetaldehyde-protein adducts increase secretion of chemokines by rat hepatic stellate cells

Kusum Kharbanda, Sandra L. Todero, Kris A. Shubert, Michael Floyd Sorrell, Dean J. Tuma

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Findings obtained from our recent studies have demonstrated that malondialdehyde, a product of lipid peroxidation, and acetaldehyde can react together with proteins in a synergistic manner and form hybrid protein conjugates, which have been designated as malondialdehyde-acetaldehyde (MAA)-protein adducts. These adducts have been detected in livers of ethanol-fed rats and are immunogenic because significant increases in circulating antibody titers against MAA-adducted proteins have been observed in ethanol-fed rats and more recently in human alcoholics. Although immunological factors may tend to perpetuate liver injury, little is known about the direct functional consequences of MAA-adducted proteins on the different cellular populations of the liver. Hepatic stellate cells (HSCs) have been shown to be pivotal in the pathogenesis of fibrosis and in the amplification and self-perpetuation of the inflammatory process. The present study was conducted to determine the effects of MAA-adducted proteins on the function of HSCs. Rat HSCs were exposed to various amounts of MAA-protein adducts and their unmodified controls, and the secretion of two chemokines, monocyte chemoattractant protein (MCP)-1 and macrophage inflammatory protein (MIP)-2, that are involved in the chemotaxis of monocytes/macrophages and neutrophils, respectively, was determined. We observed that bovine serum albumin-MAA induced a dose- and time-dependent increase in the secretion of both of these chemokines. These findings indicate that MAA-adducted proteins may play a role in the modulation of the hepatic inflammatory response and could contribute to the pathogenesis of alcoholic liver disease.

Original languageEnglish (US)
Pages (from-to)123-128
Number of pages6
JournalAlcohol
Volume25
Issue number2
DOIs
StatePublished - Dec 1 2001

Fingerprint

Hepatic Stellate Cells
Acetaldehyde
Malondialdehyde
Chemokines
alcoholism
Rats
Liver
Proteins
Disease
Ethanol
Chemokine CXCL2
Alcoholic Liver Diseases
Chemokine CCL2
Macrophages
Immunologic Factors
Chemotaxis
Alcoholics
Bovine Serum Albumin
Lipid Peroxidation
Amplification

Keywords

  • Alcoholic hepatitis
  • Alcoholic liver disease
  • Inflammation
  • Macrophage inflammatory protein-2
  • Monocyte chemoattractant protein-1

ASJC Scopus subject areas

  • Health(social science)
  • Biochemistry
  • Toxicology
  • Neurology
  • Behavioral Neuroscience

Cite this

Malondialdehyde-acetaldehyde-protein adducts increase secretion of chemokines by rat hepatic stellate cells. / Kharbanda, Kusum; Todero, Sandra L.; Shubert, Kris A.; Sorrell, Michael Floyd; Tuma, Dean J.

In: Alcohol, Vol. 25, No. 2, 01.12.2001, p. 123-128.

Research output: Contribution to journalArticle

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