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Related Experiment Videos

Modulation of cytokine expression by hypericum extract

B Thiele1, I Brink, M Ploch

  • 1Medizinische Fakultät (Charité) der Humboldt Universität zu Berlin, Germany.

Journal of Geriatric Psychiatry and Neurology
|October 1, 1994
PubMed
Summary

Hypericum extract LI 160 significantly suppressed interleukin-6 release in stimulated whole blood cultures. This finding may help explain the antidepressant effects of this herbal remedy.

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Area of Science:

  • Immunology
  • Pharmacology
  • Phytomedicine

Background:

  • Cytokines play a crucial role in immune responses and inflammation.
  • Hypericum extract (LI 160) is a popular herbal remedy often used for depression.
  • Altered cytokine profiles have been observed in patients with depression.

Purpose of the Study:

  • To investigate the in vitro effect of Hypericum extract LI 160 on cytokine expression.
  • To determine if Hypericum extract modulates cytokine release in stimulated human whole blood cultures.

Main Methods:

  • Whole blood samples from healthy volunteers and depressive patients were cultured.
  • Samples were stimulated and incubated for 24 hours.
  • The release of interleukin-6 (IL-6), interleukin-1 beta (IL-1 beta), and tumor necrosis factor-alpha (TNF-alpha) was quantified.

Main Results:

  • Hypericum extract LI 160 demonstrated a significant suppression of interleukin-6 (IL-6) release in phytohemagglutinin (PHA)-stimulated cultures.
  • No significant effects were observed on interleukin-1 beta (IL-1 beta) or tumor necrosis factor-alpha (TNF-alpha) release under these conditions.

Conclusions:

  • Hypericum extract LI 160 possesses immunomodulatory properties, specifically suppressing IL-6 production.
  • The observed suppression of IL-6 may contribute to the therapeutic effects of Hypericum extract in depression.

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