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3,4-methylenedioxymethamphetamine ("Ecstasy") stimulates the expression of alpha1(I) procollagen mRNA in hepatic
M Varela-Rey1, C Montiel-Duarte, G Beitia
1Department of Biochemistry, University of Navarra, Pamplona, Spain.
Abstract:
3,4-Methylenedioxymethamphetamine, MDMA ("Ecstasy"), has been previously shown to produce cell necrosis and fibrosis in the liver. Our aim was to study the effect of MDMA on the type I collagen production by a cell line of hepatic stellate cells (HSC), the cell type mainly responsible for collagen synthesis in the liver. We demonstrated that MDMA increases alpha1(I) procollagen mRNA levels and that this increase correlates with glutathione depletion and enhanced hydrogen peroxide production by HSC. Pre-treatment with either glutathione monoethyl ester or deferoxamine prevents the MDMA-induced alpha1(I) procollagen mRNA expression, indicating oxidative stress to be a mediator of this effect. Lipid peroxidation was not detected in MDMA-treated cells and therefore does not seem to be involved in the pro-fibrogenic action of MDMA on HSC.
Insights
3,4-Methylenedioxymethamphetamine (MDMA) increases collagen production in liver cells by depleting glutathione and increasing oxidative stress. This suggests MDMA contributes to liver fibrosis through these mechanisms.
Area of Science:
- Hepatology
- Toxicology
- Cell Biology
Background:
- 3,4-Methylenedioxymethamphetamine (MDMA) is known to cause liver damage, including cell necrosis and fibrosis.
- Hepatic stellate cells (HSC) are the primary collagen-producing cells in the liver and play a key role in liver fibrosis.
Purpose of the Study:
- To investigate the effect of MDMA on type I collagen production in hepatic stellate cells (HSC).
- To elucidate the underlying mechanisms of MDMA-induced pro-fibrogenic effects on HSC.
Main Methods:
- HSC cell line treated with MDMA.
- Measurement of alpha1(I) procollagen mRNA levels.
- Assessment of glutathione levels and hydrogen peroxide production.
- Evaluation of lipid peroxidation.
- Pre-treatment experiments with antioxidants (glutathione monoethyl ester) and iron chelators (deferoxamine).
Main Results:
- MDMA significantly increased alpha1(I) procollagen mRNA levels in HSC.
- This increase was associated with glutathione depletion and enhanced hydrogen peroxide production.
- MDMA-induced collagen mRNA expression was prevented by pre-treatment with glutathione monoethyl ester or deferoxamine.
- Lipid peroxidation was not detected in MDMA-treated cells.
Conclusions:
- MDMA stimulates type I collagen production in hepatic stellate cells.
- Oxidative stress, mediated by glutathione depletion and increased hydrogen peroxide, is a key mechanism in MDMA's pro-fibrogenic action on HSC.
- Lipid peroxidation does not appear to be involved in MDMA's pro-fibrogenic effects on HSC.