Active principles of Tetradenia riparia. IV. Anthelmintic activity of 8(14),15-sandaracopimaradiene-7α,18-diol

Abstract

Ethnopharmacological relevance: Tetradenia (T.) riparia (Hochst.) Codd (Lamiaceae), formerly known as Iboza riparia (Hochst.) N.E.Br., is one of the most frequently used medicinal plants in traditional Rwandese medicine. It was used as a remedy against a wide range of diseases including malaria, angina, yaws, dental abscesses, headache, worm infections and several kinds of fevers and aches.

Aim of the study: This study aims to identify the compounds active against helminths from Tetradenia riparia.

Methods: A bioassay-guided isolation of anthelmintic compounds from the leaves of Tetradenia riparia was performed using a Caenorhabditis elegans (C. elegans) testing model.

Results: The bioassay-guided isolation led to one active compound, i.e. 8(14),15-sandaracopimaradiene-7α,18-diol. Its IC₅₀ value was 5.4 ± 0.9 µg/mL (17.8 ± 2.9 µM).

Conclusions: We identified the bioactive compound from Tetradenia riparia responsible for its anthelmintic activity: 8(14),15-sandaracopimaradiene-7α,18-diol. Although the compound and several of its bioactivities have been described before, this is the first report of its anthelmintic effect.

Keywords: 8(14),15-sandaracopimaradiene-7α,18-diol; Anthelmintic activity; Caenorhabditis elegans; Rwandese traditional medicine; Tetradenia riparia.