Browsing by Author "Orago, AS"

Now showing 1 - 4 of 4
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    PublicationOpen Access
    Anti-plasmodial activity of some Kenyan medicinal plant extracts singly and in combination with chloroquine.
    (Phytother Res., 2004-05) Muregi, Francis W.; Chhabra, S. C.; Njagi, EN; Thoruwa, Lang'at CC; Njue, WM; Orago, AS; Omar, SA; Ndiege, IO
    Sixty organic and aqueous extracts of eleven plants used for the control of malaria by local communities in Kisii District, Kenya were screened for in vitro anti-plasmodial activity. The plants selection was based on existing ethnobotanical information and interviews with local communities. The extracts were tested against chloroquine sensitive and resistant laboratory adapted strains of Plasmodium falciparum. The study revealed that 63.6% of the plants were active (IC50 < or = 100 microg/mL). Extracts of four plants, Ekebergia capensis, Stephania abyssinica, Ajuga remota and Clerodendrum myricoides gave IC50 values below 30 microg/mL against both chloroquine sensitive and resistant P. falciparum strains. Combination of extracts of E. capensis and C. myricoides with chloroquine against the multi-drug resistant P. falciparum isolate (V1/S) revealed synergistic effect. The plants which showed activity may be useful as sources for novel anti-plasmodial compounds.
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    PublicationOpen Access
    Anti-plasmodial activity of some Kenyan medicinal plant extracts singly and in combination with chloroquine.
    (Mount Kenya University, 2004-05) Muregi, FW; Chhabra, SC; Njagi, EN; Lang'at, Thoruwa CC; Njue, WM; Orago, AS; Omar, SA; Ndiege, IO
    Sixty organic and aqueous extracts of eleven plants used for the control of malaria by local communities in Kisii District, Kenya were screened for in vitro anti-plasmodial activity. The plants selection was based on existing ethnobotanical information and interviews with local communities. The extracts were tested against chloroquine sensitive and resistant laboratory adapted strains of Plasmodium falciparum. The study revealed that 63.6% of the plants were active (IC50 < or = 100 microg/mL). Extracts of four plants, Ekebergia capensis, Stephania abyssinica, Ajuga remota and Clerodendrum myricoides gave IC50 values below 30 microg/mL against both chloroquine sensitive and resistant P. falciparum strains. Combination of extracts of E. capensis and C. myricoides with chloroquine against the multi-drug resistant P. falciparum isolate (V1/S) revealed synergistic effect. The plants which showed activity may be useful as sources for novel anti-plasmodial compounds.
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    PublicationOpen Access
    In vitro antiplasmodial activity of some plants used in Kisii, Kenya against malaria and their chloroquine potentiation effects.
    (Mount Kenya University, 2003-02) Muregi, FW; Chhabra, EN; Lang'at, Thoruwa CC; Nijue, WM; Orago, AS; Omar, AS; Ndiege, IO
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    PublicationOpen Access
    In vitro antiplasmodial activity of some plants used in Kisii, Kenya against malaria and their chloroquine potentiation effects.
    (J Ethnopharmacol, 2003-02) Muregi, FW; Chhabra, sc; Njagi, EN; Thoruwa, Lang'at; Njue, WM; Orago, AS; Omar, SA; Ndiege, IO
    Fifty-five organic and aqueous extracts of 11 plants used in malaria therapy in Kisii District, Kenya were tested in vitro against chloroquine (CQ)-sensitive and resistant strains of Plasmodium falciparum. Of the plants tested, 73% were active (IC(50) < 100 microg/ml). Three plants, Vernonia lasiopus, Rhamnus prinoides and Ficus sur afforded extracts with IC(50) values ranging less than 30 microg/ml against both CQ-sensitive and resistant strains. Combination of some extracts with CQ against the multi-drug resistant P. falciparum isolate V1/S revealed some synergistic effect. The plant extracts with low IC(50) values may be used as sources for novel antimalarial compounds to be used alone or in combination with CQ.