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Related Experiment Videos

[Hepatic fibrosis and progesterone].

A Lanari1, T C Garegnani, G Heinrichs

  • 1Instituto de Investigaciones Médicas A. Lanari, Facultad de Medicina, U.N.B.A.

Acta Gastroenterologica Latinoamericana
|January 1, 1988
PubMed
Summary

Progesterone protects liver cells from fibrosis caused by toxins. Early or delayed progesterone treatment significantly reduced liver damage and improved lab results, indicating its therapeutic potential in managing hepatic fibrosis.

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Area of Science:

  • Hepatology
  • Endocrinology
  • Toxicology

Background:

  • Hepatic fibrosis is a serious condition often leading to cirrhosis.
  • Understanding the role of hormones like progesterone in liver health is crucial.
  • Current treatments for liver fibrosis have limitations.

Purpose of the Study:

  • To investigate the protective effects of progesterone on liver fibrosis.
  • To determine if early or delayed progesterone administration impacts fibrosis progression.
  • To explore the mechanisms underlying progesterone's action on liver cells and fibroblasts.

Main Methods:

  • Induction of hepatic fibrosis in 55 male New Zealand rabbits using carbon tetrachloride and ethanol over six months.
  • Administration of progesterone (0.66 mg, 3 times/week, IM) either from the onset of fibrosis induction or after 180 days.

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  • Biopsy analysis and laboratory tests (ASAT-ALAT) to assess liver damage and fibrosis progression.

    • Main Results:

    • Progesterone treatment, whether early or delayed, protected hepatocytes, preventing vacuolization, inflammation, and fat metamorphosis.
    • Fibrous septa were significantly thinner in progesterone-treated rabbits.
    • Significant differences (p<0.01) were observed in liver enzymes (ASAT-ALAT) between toxic-only and progesterone-treated groups, especially between days 60-180.
    • Progesterone demonstrated fibroblast-destroying properties in vitro and in other clinical applications.

    Conclusions:

    • Progesterone exhibits significant protective effects against chemically induced hepatic fibrosis in rabbits.
    • Both early and delayed administration of progesterone can mitigate liver damage and reduce fibrosis.
    • Progesterone's mechanism may involve direct action on fibroblasts, though myofibroblast activity might explain incomplete cirrhosis resolution.