Research Article

Natural Products as Sources of Antimalarial Drugs: Ethnobotanical and Ethnopharmacological Studies

Table 4

The antimalarial activity of selected medicinal plants.

S/nPlant namePlant part usedCountryPlasmodium species treatedSolvent used for extractionModelControlAntiplasmodial activityReference

1Icacina senegalensisLeafNigeriaP. bergheiMethanolSwiss albino miceChloroquineA dose-dependent chemosuppression of the parasites was observed at different dose levels of the extract tested with a considerable mean survival time[54]
2Cymbopogon citratusLeafNigeriaP. falciparumAqueousSwiss albino ratsChloroquineSignificant decrease of parasitaemia levels was observed in 120 mg/kg body weight treated group[55]
3Azadirachta indicaLeafGhanaP. bergheiAqueous and ethanolBALB/c miceDistilled water (negative), artemether (positive)Chemosuppression of 69.65, 75.76, 78.32% (ethanol) and 64.42, 70.23, 77.41% (aqueous); artemether (86.77%)[56]
4A. djalonensis, A. indica, C. cajan, C. cujete, L. inermis, L. alata, M. preussii, N. latifolia, O. subscorpioidea, and T. glaucescensStem bark, leaf, and rootNigeriaP. bergheiEthanol and aqueousSwiss albino miceDistilled water (negative) and chloroquine (positive)Optimum activity was recorded on day 4. The activity was highest with water extract of the recipe at 500 mg/kg[57]
5Morinda lucida, Alstonia boonei, Curcuma longaLeafNigeriaP. bergheiEthanolSwiss albino miceSulphadoxine-pyrimethamine (S-P), and quinineChemosuppression of 39.8–90.5, 0.2–74.8, and 34.6–78.4% observed in MLE, ABE, and CLE[58]
6Azadirachta indicaLeafIndonesiaP. falciparumEthanolThe extract inhibited P. falciparum on mature schizont stage with IC50 of 3.86 μg/ml after 32 h incubation[59]
7Morinda lucidaLeafNigeriaP. bergheiDichloromethane-methanolAdult Swiss albino miceChloroquinePPCPE was active against P. berghei NK65 in vivo, with 51.52% reduction in parasitaemia on day 4 after inoculation[60]
8Ocimum basilicum, Ocimum canum, and Cymbopogon citratusLeafCameroonP. falciparum and mature-stage larvae of Anopheles funestusHuman red blood cells in RPMI 1640 mediumGiemsa-stained blood smearIC50 = 4.2 ± 0.5 l g/mL (C. citratus), 20.6 ± 3.4 lg/mL (O. canum) and 21 ± 4.6 lg/mL (O. basilicum)[61]
9Azadirachta indicaLeafSaudi ArabiaP. bergheiEthanolSwiss albino miceChloroquine and artemetherAlcoholic extracts displayed no activity, ethanol extracts of neem displayed increased parasitaemia gradually from day 0 (5%, 5.1%, and 7.2%) to day 4, with mean parasitaemia of 53%[62]
10Nauclea latifolia, Artocarpus altilis, Murraya koenigii, and Enantia chloranthaStem bark, root, leafNigeriaP. bergheiEthanolBerghei-infected micePyrimethamine and chloroquineProphylactic and curative ED50 of 189.4 and 174.5 mg/kg for N. latifolia and chemosuppressive ED50 of 227.2 mg/kg for A. altilis[63]
11Morinda lucida, Artemisia annuaLeaf, stem barkNigeriaP. falciparumEthanolChloroquineMIC for chloroquine is 0.6 μg/ml, M. lucida is 0.6 mg/ml, and A. Boonei is 0.2 mg/ml[64]
12Cymbopogon citratusWhole plantNigeriaP. chabaudi AS or P. berghei ANKACBA/Ca male miceChloroquineAs a prophylactic treatment, the whole plant exhibited higher antimalarial activity than either the herbal infusion or chloroquine[65]
13Calotropis giganteaLeaf, stem, and flowerIndiaP. falciparum (3D7 strain) and P. berghei (ANKA)Methanol, ethyl acetate, and chloroformInfected BALB/c albino miceChloroquineMethanolic extract of leaves showed highest antimalarial activity with IC50 value of 12.17 μg/ml[66]
14Cymbopogon citratusLeaf and rootNigeriaP. bergheiAqueousInfected miceChloroquineThe aqueous leaf extracts have suppressive effect of 20.83%, 55.56%, and 80.56%, root extracts have 50.38%, 77.78%, and 100%[67]
15Carica papaya and Vernonia amygdalinaLeaf extractsNigeriaChloroquine-sensitive P. berghei (Nk65)AqueousInfected miceHalofantrineSignificant reduction in the percentage of parasite load between the infected treatment groups and disease control group at day 3[68]
16Mangifera indica, Psidium guajava, Carica papaya, Cymbopogon citratus, Citrus sinensis, and Ocimum gratissimumBark and leafCameroonP. falciparumAqueous and ethanol3% hematocrit in human red blood cellsChloroquine and artemisininThe derived EC50 (3D7/Dd2, g/mL) are nefang 96.96/55.08, MiB-65.33/34.58, MiL-82.56/40.04, Pg-47.02/25.79, Cp-1188/317.5, Cc-723.3/141s and og-778.5/118.9[69]
17Aloe megalacanthaLeafEthiopiaP. bergheiSwiss albino miceChloroquineParasite suppression of day 1 (30.3%, 43.4%, and 56.4%), day 2 (32.3%, 51.3%, and 67.4%), day 3 (39.8%, 50.6%, and 64.2%), day 4 (52.6%, 69.4%, and 79.6%) was observed at doses of 100, 200, and 400 mg/kg/day[70]
18Aloe veraLeafIndiaP. falciparum (MRC-2).AqueousChloroquineThe EC50 of 0.289 to 1056 μg/ml. The antiplasmodial EC50 of chloroquine was 0.034 μg/ml and aloin and aloe-emodin was 67 μg/ml and 22 μg/ml, respectively[11]
19Carica papayaFruit rind and rootEthiopiaP. bergheiPet ether, chloroform, and methanolMale Swiss albino miceChloroquineSuppression of 61.78% was produced by pet ether fraction of C. papaya fruit rind, chloroform fraction of C. papaya root exhibited (48.11%), methanol fraction produced less effect[71]
20Mangifera IndicaLeafNigeriaP. BergheiAqueousInfected albino miceArtesunateThe extract has a dose-dependent reducing effect on the level of parasitaemia[72]
21Stemonocoleus micranthusStem barkNigeriaP. bergheiHydromethanolSwiss albino miceChloroquine (positive)Chemosuppressive effect ranged from 54.14 to 67.73% and 59.41 to 94.51%[73]
22Lawsonia inermis, Tithonia diversifolia, and Chromolaena odorataLeafNigeriaP. berghei ANKADichloromethane, methanolSwiss albino miceChloroquine and artemisininIC50 of 0.437 ± 0.02 mg/mL and 2.557 ± 0.19 mg/mL against D6 and W2, respectively[43]
23Holarrhena antidysenterica and Azadirachta indicaLeaves, stem, barkIndiaP. bergheiAqueousMycoplasma free male Swiss miceChloroquineThe parasitaemia increased gradually in all the groups, with the maximum in the control group (day 3–35, day 9–46.98) and minimum in chloroquine arm (day 3–14.06, day 9–19.92)[41]
24Euphorbia hirta and Vernonia amygdalinaWhole plant, leavesNigeriaP. bergheiEthanolInfected miceCamosunate, ACTACT was slightly potent (>50%) against chloroquine-sensitive P. berghei[74]
25Pseudocedrala kotschyiLeafNigeriaP. bergheiEthanolSwiss Albino miceChloroquineThe leaf extract exhibited significant dose-dependent activity against the parasite in the suppressive and curative activity[75]