Phytochemical study of plants used in traditional medicine in the treatment of malaria in the Comoros islands

Kaou, Ali Mohamed; Mahiou-Leddet, Valérie; Mabrouki, F; Hutter, Sébastien; Laget, M.; Azas, Nadine; Ibrahim, Yahaya; Ollivier, Évelyne

doi:10.1055/s-0030-1264716

Cited by 2 publications

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“…The traditional African practice of formulating antimalarial as mixture of several plants or plant parts is an age long approach with good results. The traditional usage of plants that contain methyl gallate and palmatine as active ingredients is reported to be effective in malaria treatment [12][13][14]. Methyl gallate (a phenolic compound) and palmatine (a yellow quaternary protoberberine alkaloid) are pharmacologically active constituents of many plants [15][16][17] with various reported biological activities, including antimalarial activities [16,[18][19][20][21][22][23].…”

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confidence: 99%

Piperine Enhances Antimalarial Activity of Methyl Gallate and Palmatine Combination

Adegunloye,

Adebayo

2024

Acta Parasit.

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Multiple reported treatment failures of malaria with artemisinin combination therapies, the rst-line antimalarials, necessitate the search for novel combination of compounds. Methyl gallate and palmatine have been reported to exhibit antiplasmodial activities but the antimalarial activity of their combination has not been evaluated. Therefore, the evaluation of the combination of methyl gallate and palmatine for antimalarial activity in vitro and in vivo in the presence of piperine was carried out. Materials and MethodsThe inhibitory potential of methyl gallate and palmatine combination on β-hematin (hemozoin) formation was studied in vitro. Also, the antimalarial activity of methyl gallate and palmatine combination with/without a bioenhancer (piperine) was evaluated in Plasmodium berghei NK65-infected mice. ResultsMethyl gallate and palmatine in the ratio 3:2 acted synergistically in vitro and had the highest inhibitory effect (IC 50 = 0.73 µg/mL) on β-hematin (hemozoin) formation. The 3:2 combination of methyl gallate and palmatine exhibited no antimalarial activity in vivo in the absence of piperine but caused reduction in parasitemia that exceeded 40% in the presence of piperine at the dose of 25 mg/kg body weight on days 6 and 8 post-inoculation in mice. ConclusionThe 3:2 combination of methyl gallate and palmatine in the presence of piperine exhibited antimalarial activity in vivo, possibly by synergistic inhibition of hemozoin formation which may cause accumulation of haem within the food vacuole of Plasmodium spp. and its death.

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Section: Introductionmentioning

confidence: 99%

Piperine Enhances Antimalarial Activity of Methyl Gallate and Palmatine Combination

Adegunloye,

Adebayo

2024

Acta Parasit.

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Piperine Enhances Antimalarial Activity of Methyl Gallate and Palmatine Combination

Adegunloye,

Adebayo

2023

Preprint

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Purpose Multiple reported treatment failures of malaria with artemisinin combination therapies, the first-line antimalarials, necessitate the search for novel combination of compounds. Methyl gallate and palmatine have been reported to exhibit antiplasmodial activities but the antimalarial activity of their combination has not been evaluated. Therefore, the evaluation of the combination of methyl gallate and palmatine for antimalarial activity in vitro and in vivo in the presence of piperine was carried out. Materials and Methods The inhibitory potential of methyl gallate and palmatine combination on β-hematin (hemozoin) formation was studied in vitro. Also, the antimalarial activity of methyl gallate and palmatine combination with/without a bioenhancer (piperine) was evaluated in Plasmodium berghei NK65-infected mice. Results Methyl gallate and palmatine in the ratio 3:2 acted synergistically in vitro and had the highest inhibitory effect (IC50 = 0.73 µg/mL) on β-hematin (hemozoin) formation. The 3:2 combination of methyl gallate and palmatine exhibited no antimalarial activity in vivo in the absence of piperine but caused reduction in parasitemia that exceeded 40% in the presence of piperine at the dose of 25 mg/kg body weight on days 6 and 8 post-inoculation in mice. Conclusion The 3:2 combination of methyl gallate and palmatine in the presence of piperine exhibited antimalarial activity in vivo, possibly by synergistic inhibition of hemozoin formation which may cause accumulation of haem within the food vacuole of Plasmodium spp. and its death.

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Phytochemical study of plants used in traditional medicine in the treatment of malaria in the Comoros islands

Cited by 2 publications

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Piperine Enhances Antimalarial Activity of Methyl Gallate and Palmatine Combination

Piperine Enhances Antimalarial Activity of Methyl Gallate and Palmatine Combination

Piperine Enhances Antimalarial Activity of Methyl Gallate and Palmatine Combination

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