Anti-nociceptive and anti-hyperprolactinemia activities of Fructus Viticis and its effective fractions and chemical constituents

Phytomedicine. 2007 Oct;14(10):668-74. doi: 10.1016/j.phymed.2007.01.008. Epub 2007 Mar 9.

Abstract

Vitex rotundifolia L. is widely distributed along the sea coast of China. The aim of this study was to investigate the anti-nociceptive and anti-hyperprolactinemia activities of substances isolated from Fructus Viticis (the fruit of Vitex rotundifolia), which may be effective in the treatment of pre-menstrual symptoms, using acetic-acid-induced writhing and metoclopramide-dihydrochloride-induced hyperprolactinemia in mice. The fractions effective in terms of anti-nociceptive and anti-hyperprolactinemia activities were obtained from Fructus Viticis by elution through macro-porous resin, and polyamide and silica gel column chromatography. The standardization of the fractions obtained from the separation procedures was carried out by means of high-performance liquid chromatography (HPLC)-fingerprint. In this study, the flavone-enriched fraction (Fraction 6) showed a higher inhibitory rate than indomethacin (69.4% vs. 56.4%) at a dose of 50 mg/kg body wt., and significantly reduced the prolactin level as compared to HPRL-treated mice (8.2 ng/ml vs. 25.5 ng/ml). Furthermore, this fraction showed anti-nociceptive activity in a dose-dependent manner (10-50 mg/kg body wt., i.g.). On further purification with silica gel, Casticin was isolated from this fraction and it decreased abnormal serum levels of prolactin by approximately 50% (p < 0.01). Using bioassay-screening methods, our results indicate that the presence of flavonoids such as Casticin in this plant may be responsible for the activity effects. Casticin has potent analgesic and anti-hyperprolactinaemia properties, is likely to be one of the active components of Fructus Viticis, and may have a role in treating PMS (premenstrual syndrom).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetic Acid
  • Administration, Oral
  • Analgesics / administration & dosage
  • Analgesics / pharmacology*
  • Analgesics / therapeutic use
  • Animals
  • Female
  • Fruit
  • Hyperprolactinemia / prevention & control*
  • Mice
  • Mice, Inbred ICR
  • Pain / chemically induced
  • Pain / prevention & control*
  • Pain Measurement / drug effects
  • Phytotherapy*
  • Plant Extracts / administration & dosage
  • Plant Extracts / pharmacology*
  • Plant Extracts / therapeutic use
  • Premenstrual Syndrome / drug therapy
  • Vitex*

Substances

  • Analgesics
  • Plant Extracts
  • Acetic Acid