acetaldehyde/nekrosis

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Malondialdehyde-acetaldehyde-haptenated protein induces cell death by induction of necrosis and apoptosis in immune cells.

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Recent studies have demonstrated that circulating antibodies against malondialdehyde-acetaldehyde (MAA)-haptenated proteins are significantly increased in patients with alcohol-induced cirrhosis and hepatitis and correlate with the severity of liver damage. Additionally, when proteins are haptenated

Acetaldehyde-induced interleukin-1beta and tumor necrosis factor-alpha production is inhibited by berberine through nuclear factor-kappaB signaling pathway in HepG2 cells.

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Alcoholic liver disease (ALD) is one of the most common liver diseases in the world. Increased levels of proinflammatory cytokines, including interleukin-1beta (IL-1beta) and tumor necrosis factor-alpha (TNF-alpha), have been correlated with the patients affected by ALD. However, the direct effect

Malondialdehyde-Acetaldehyde-Adducted Surfactant Protein Alters Macrophage Functions Through Scavenger Receptor A.

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Reactive aldehydes such as acetaldehyde and malondialdehyde generated as a result of alcohol metabolism and cigarette smoke exposure lead to the formation of malondialdehyde-acetaldehyde-adducted proteins (MAA adducts). These aldehydes can adduct to different proteins such as bovine serum albumin

No acute effects of an exposure to 50 ppm acetaldehyde on the upper airways.

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OBJECTIVE German MAK value of acetaldehyde has been fixed at 50 ppm to prevent from irritating effects. The threshold value is mainly based on animal experiments. The aim of this study was to evaluate acute effects of an exposure to 50 ppm acetaldehyde on the upper airways of human

Cytotoxic effect of 7alpha-hydroxy-4-cholesten-3-one on HepG2 cells: hypothetical role of acetaldehyde-modified delta4-3-ketosteroid-5beta-reductase (the 37-kd-liver protein) in the pathogenesis of alcoholic liver injury in the rat.

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We recently identified delta4-3-ketosteroid-5beta-reductase as the 37 kd liver protein which is highly susceptible to acetaldehyde modification in rats continuously fed alcohol. The 5beta-reductase is a key enzyme involved in bile acid synthesis. We report here that the ability to degrade

Suppression of tumor necrosis factor production by alcohol in lipopolysaccharide-stimulated culture.

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Many studies have shown that alcohol consumption is associated with alteration in immune responses and increased incidence of infection in the host. Tumor necrosis factor (TNF) is a potent soluble mediator of immunoregulation and inflammation, and plays a very important role in host's defenses

Acetaldehyde inhibits NF-kappaB activation through IkappaBalpha preservation in rat Kupffer cells.

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OBJECTIVE Treatment with acetaldehyde dehydrogenase inhibitors leads to increased liver acetaldehyde levels and prevents hepatic inflammation and necrosis in ethanol-fed rats. This is accompanied by IkappaBa preservation and decreased activation of nuclear factor (NF)-kappaB. The present in vitro

Betulin, betulinic acid and butein are inhibitors of acetaldehyde-induced activation of liver stellate cells.

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Liver fibrosis has been reported to be inhibited in vivo by oleanolic and ursolic acids; however, the activity of other triterpenes like betulin and betulinic acid has not been examined. Butein has also been reported to prevent and partly reverse liver fibrosis in vivo, although its mechanism of

mRNA induction and cytokine release of inflammatory mediators during in vitro exposure of human nasal respiratory epithelia to acetaldehyde.

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Acetaldehyde has been shown to be cytotoxic and carcinogenic to the upper respiratory tract epithelium of rodents following long-term exposure. Most animal studies have concentrated on carcinogenicity and DNA-protein cross-link formation, while less is known about potential dose- and time-dependent

Repeated exposure to acetaldehyde vapor. Studies in Syrian golden hamsters.

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The subacute inhalation toxicity of acetaldehyde was examined with four groups of 20 hamsters each, exposed repeatedly to acetaldehyde vapor at concentrations of 0, 390, 1,340, and 4,560 ppm (six hr day, five days/week) for a 90-day period. The highest level induced growth retardation, ocular and

The effects of acetaldehyde and 2,3-butanediol on rat embryos developing in vitro.

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The embryotoxicity of two ethanol metabolites, acetaldehyde and 2,3-butanediol, have been examined in cultured 10-day Albino Wistar rat embryos over a 2-day period. At acetaldehyde concentrations of 100 and 260 microM, no significant effects were observed on embryonic protein, DNA, somite

Association of malondialdehyde-acetaldehyde (MAA) adducted proteins with atherosclerotic-induced vascular inflammatory injury.

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Atherosclerosis is a vascular injury characterized by elevated tissue levels of tumor necrosis factor-alpha (TNF-alpha), increased expression of endothelial cell adhesion molecules, and vascular wall inflammatory cell infiltration. Foam cells are associated with atherosclerotic plaque material, and

Effects of ethanol and acetaldehyde on hepatic plasma membrane ATPases.

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To elucidate possible causes of the hepatocyte swelling and necrosis found in alcoholic liver disease, the effects of ethanol and acetaldehyde on the activities of two hepatic plasma membrane ATPases--(Na+K+) ATPase and Mg2+ ATPase--were investigated. The activity of another plasma membrane-bound

Cell-mediated immunity to acetaldehyde in alcoholic liver disease demonstrated by leukocyte migration test.

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To determine whether a sensitization to ethanol metabolites occurs in alcoholic liver disease, reactivity of lymphocytes to nontoxic amounts of acetaldehyde was studied by direct elaboration of migration inhibitory factor (MIF) production. Eighteen alcoholics with various degrees of biopsy-proven

Effects of acetaldehyde and TNF alpha on the inhibitory kappa B-alpha protein and nuclear factor kappa B activation in hepatic stellate cells.

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OBJECTIVE Increased plasma tumour necrosis alpha (TNFalpha) and elevated monocyte nuclear factor kappa B (NF-kappaB) are associated with liver injury and inflammation in models of alcoholic liver disease and are found to be elevated in monocytes of patients with alcoholic hepatitis. Acetaldehyde

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