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At least 37 records · Page 2Linked to original sources
PubMed1987

Antiamoebic activity of chonemorphine, a steroidal alkaloid, in experimental models.

Chonemorphine, a steroidal alkaloid isolated from Chonemorpha fragrans Moon (Apocyanaceae) was identified as an antimoebic principle during the course of a screening programme for novel antiparasitic agents from plant sources. At a dosage of 100 mg/kg x 4 chonemorphine led to a 100% cure of experimental hepatic infection in golden hamsters and cleared 90% of the intestinal infection in weanling Wistar rats at 200 mg/kg (x4) dosages. The discovery of chonemorphine as an antiamoebic agent is an addition to the few known plant amoebicides such as emetine and conessine.

Amebicides↗
PubMed2005

Isolation, characterization and antiplasmodial activity of steroidal alkaloids from Funtumia elastica (Preuss) Stapf.

Bioassay-guided fractionation of the EtOH extract of the stem bark of Funtumia elastica resulted in the isolation of four steroidal alkaloids, holarrhetine (1), conessine (2), holarrhesine (3) and isoconessimine (4). Their structures were determined on the basis of 1D- and 2D-NMR techniques and mass spectrometry. Compounds 1-4 exhibited in vitro antiplasmodial activity against the chloroquine-resistant strain FcB1 of Plasmodium falciparum with IC50 values ranging from 0.97 to 3.39 microM. They showed weak cytotoxicity against a rat cell line L-6 with IC50 values ranging from 5.13 to 36.55 microM.

Alkaloids↗
PubMed1990

Alkaloids in the tissue culture of Holarrhena antidysenterica.

In the present study the tissue culture of a medicinal plant Holarrhena antidisenterica was established. Phytochemical analysis revealed a presence of a few alkaloids in the callus tissues. Two of them were determined by TLC as conessine and conimine. A screening of antibacterial activity of alkaloid extract was performed.

Alkaloids↗