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Tematio Fouedjou R, Tsakem B, Siwe-Noundou X, Dongmo Fogang HP, Tiombou Donkia A, Kemvoufo Ponou B, Poka M, Demana PH, Teponno RB, Azefack Tapondjou L. Ethnobotany, Phytochemistry, and Biological Activities of the Genus Cordyline. Biomolecules 2023; 13:1783. [PMID: 38136652 PMCID: PMC10741932 DOI: 10.3390/biom13121783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/30/2023] [Accepted: 12/08/2023] [Indexed: 12/24/2023] Open
Abstract
Cordyline species have a long history in traditional medicine as a basis of treatment for various ailments such as a bloody cough, dysentery, and a high fever. There are about 26 accepted species names in this genus distributed worldwide, including C. fruticosa, C. autralis, C. stricta, C. cannifolia, and C. dracaenosides. This work presents a comprehensive review of the traditional uses of plants of the genus Cordylie and their chemical constituents and biological activities. A bibliographic search was conducted to identify available information on ethnobotany, ethnopharmacology, chemical composition, and biological activities. A total of 98 isolated compounds potentially responsible for most of the traditional medicinal applications have been reported from eight species of Cordyline and are characterised as flavonoid, spirostane, furostane, and cholestane glycosides. Some of these pure compounds, as well as extracts from some species of Cordyline, have exhibited noteworthy anti-oxidant, antiproliferative, antimicrobial, and hypolipidemic activities. Although many of these species have not yet been investigated phytochemically or pharmacologically, they remain a potential source of new bioactive compounds.
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Affiliation(s)
- Romuald Tematio Fouedjou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon; (R.T.F.); (B.T.); (A.T.D.); (B.K.P.); (L.A.T.)
| | - Bienvenu Tsakem
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon; (R.T.F.); (B.T.); (A.T.D.); (B.K.P.); (L.A.T.)
| | - Xavier Siwe-Noundou
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, P.O. Box 218, Pretoria 0208, South Africa; (M.P.); (P.H.D.)
| | - Hervet P. Dongmo Fogang
- Department of Physiological Sciences and Biochemistry, Faculty of Medicine and Biomedical, Sciences, University of Garoua, Garoua P.O. Box 317, Cameroon;
| | - Aphalaine Tiombou Donkia
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon; (R.T.F.); (B.T.); (A.T.D.); (B.K.P.); (L.A.T.)
| | - Beaudelaire Kemvoufo Ponou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon; (R.T.F.); (B.T.); (A.T.D.); (B.K.P.); (L.A.T.)
| | - Madan Poka
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, P.O. Box 218, Pretoria 0208, South Africa; (M.P.); (P.H.D.)
| | - Patrick H. Demana
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, P.O. Box 218, Pretoria 0208, South Africa; (M.P.); (P.H.D.)
| | - Rémy B. Teponno
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon; (R.T.F.); (B.T.); (A.T.D.); (B.K.P.); (L.A.T.)
| | - Léon Azefack Tapondjou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon; (R.T.F.); (B.T.); (A.T.D.); (B.K.P.); (L.A.T.)
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Amang à Ngnoung GA, Nganso Ditchou YO, Leutcha PB, Dize D, Tatsimo SJN, Tchokouaha LRY, Kowa TK, Tembeni B, Mamoudou H, Poka M, Demana PH, Siwe Noundou X, Fekam Boyom F, Meli Lannang A. Antiplasmodial and Antileishmanial Activities of a New Limonoid and Other Constituents from the Stem Bark of Khaya senegalensis. Molecules 2023; 28:7227. [PMID: 37894704 PMCID: PMC10609173 DOI: 10.3390/molecules28207227] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 10/19/2023] [Accepted: 10/19/2023] [Indexed: 10/29/2023] Open
Abstract
Plasmodium falciparum and Leishmania sp. resistance to antiparasitic drugs has become a major concern in malaria and leishmaniasis control. These diseases are public health problems with significant socioeconomic impacts, and mostly affect disadvantaged populations living in remote tropical areas. This challenge emphasizes the need to search for new chemical scaffolds that preferably possess novel modes of action to contribute to antimalarial and antileishmanial research programs. This study aimed to investigate the antimalarial and antileishmanial properties of a methanol extract (KS-MeOH) of the stem bark of the Cameroonian medicinal plant Khaya senegalensis and its isolated compounds. The purification of KS-MeOH led to the isolation of a new ordered limonoid derivative, 21β-hydroxybourjotinolone A (1a), together with 15 known compounds (1bc-14) using a repeated column chromatography. Compound 1a was obtained in an epimeric mixture of 21α-melianodiol (1b) and 21β-melianodiol (1c). Structural characterization of the isolated compounds was achieved with HRMS, and 1D- and 2D-NMR analyses. The extracts and compounds were screened using pre-established in vitro methods against synchronized ring stage cultures of the multidrug-resistant Dd2 and chloroquine-sensitive/sulfadoxine-resistant 3D7 strains of Plasmodium falciparum and the promastigote form of Leishmania donovani (1S(MHOM/SD/62/1S). In addition, the samples were tested for cytotoxicity against RAW 264.7 macrophages. Positive controls consisted of artemisinin and chloroquine for P. falciparum, amphotericin B for L. donovani, and podophyllotoxin for cytotoxicity against RAW 264.7 cells. The extract and fractions exhibited moderate to potent antileishmanial activity with 50% inhibitory concentrations (IC50) ranging from 5.99 ± 0.77 to 2.68 ± 0.42 μg/mL, while compounds displayed IC50 values ranging from 81.73 ± 0.12 to 6.43 ± 0.06 μg/mL. They were weakly active against the chloroquine-sensitive/sulfadoxine-resistant Pf3D7 strain but highly potent toward the multidrug-resistant PfDd2 (extracts, IC50 2.50 ± 0.12 to 4.78 ± 0.36 μg/mL; compounds IC50 2.93 ± 0.02 to 50.97 ± 0.37 μg/mL) with selectivity indices greater than 10 (SIDd2 > 10) for the extract and fractions and most of the derived compounds. Of note, the limonoid mixture [21β-hydroxylbourjotinolone A (1a) + 21α-melianodiol (1b) + 21β-melianodiol (1c)] exhibited moderate activity against P. falciparum and L. donovani. This novel antiplasmodial and antileishmanial chemical scaffold qualifies as a promising starting point for further medicinal chemistry-driven development of a dually active agent against two major infectious diseases affecting humans in Africa.
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Affiliation(s)
- Gabrielle Ange Amang à Ngnoung
- Department of Chemistry, Faculty of Science, University of Maroua, Maroua P.O. Box 814, Cameroon; (G.A.A.à.N.); (P.B.L.)
| | - Yves Oscar Nganso Ditchou
- Department of Chemistry, Faculty of Science, University of Maroua, Maroua P.O. Box 814, Cameroon; (G.A.A.à.N.); (P.B.L.)
| | - Peron Bosco Leutcha
- Department of Chemistry, Faculty of Science, University of Maroua, Maroua P.O. Box 814, Cameroon; (G.A.A.à.N.); (P.B.L.)
- Natural Product and Environmental Chemistry Group (NAPEC), Department of Chemistry, Higher Teachers’ Training College, University of Maroua, Maroua P.O. Box 55, Cameroon; (S.J.N.T.); (A.M.L.)
| | - Darline Dize
- Antimicrobial and Biocontrol Agents Unit (AmBcAU), Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé P.O. Box 812, Cameroon; (D.D.); (F.F.B.)
| | - Simplice Joël Ndendoung Tatsimo
- Natural Product and Environmental Chemistry Group (NAPEC), Department of Chemistry, Higher Teachers’ Training College, University of Maroua, Maroua P.O. Box 55, Cameroon; (S.J.N.T.); (A.M.L.)
| | - Lauve Rachel Yamthe Tchokouaha
- Laboratory of Pharmacology, Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, Yaoundé P.O. Box 13033, Cameroon;
| | - Theodora Kopa Kowa
- Laboratory of Phytochemistry, Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, Yaoundé P.O. Box 13033, Cameroon;
| | - Babalwa Tembeni
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa; (B.T.); (M.P.); (P.H.D.)
| | - Hamadou Mamoudou
- Department of Biological Sciences, Faculty of Science, University of Maroua, Maroua P.O. Box 814, Cameroon;
| | - Madan Poka
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa; (B.T.); (M.P.); (P.H.D.)
| | - Patrick Hulisani Demana
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa; (B.T.); (M.P.); (P.H.D.)
| | - Xavier Siwe Noundou
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa; (B.T.); (M.P.); (P.H.D.)
| | - Fabrice Fekam Boyom
- Antimicrobial and Biocontrol Agents Unit (AmBcAU), Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé P.O. Box 812, Cameroon; (D.D.); (F.F.B.)
- Laboratory of Pharmacology, Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, Yaoundé P.O. Box 13033, Cameroon;
- Advanced Research and Health Innovation Hub (ARHIH), Yaoundé P.O. Box 20133, Cameroon
| | - Alain Meli Lannang
- Natural Product and Environmental Chemistry Group (NAPEC), Department of Chemistry, Higher Teachers’ Training College, University of Maroua, Maroua P.O. Box 55, Cameroon; (S.J.N.T.); (A.M.L.)
- Department of Chemical Engineering, School of Chemical Engineering and Mineral Industries, University of Ngaoundere, Ngaoundere P.O. Box 454, Cameroon
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Bopape PG, Wagenaar C, Poka M, Bronkhorst E. Vitamin D supplementation in a post-pandemic era: A narrative review. S Afr Fam Pract (2004) 2023; 65:e1-e6. [PMID: 37916701 PMCID: PMC10623655 DOI: 10.4102/safp.v65i1.5752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 08/23/2023] [Accepted: 08/24/2023] [Indexed: 11/03/2023] Open
Abstract
Vitamin D is a fat-soluble molecule referring to the different isoforms, ergocalciferol (D2) and cholecalciferol (D3). Its physiological functions include increasing calcium serum concentrations. 25-hydroxyvitamin D3 (25(OH)D) (Calcifediol), a non-active, circulating instant precursor is seen as a pre-hormone. Studies have shown that a deficiency in calcifediol is related to chronic conditions such as cardiovascular, musculoskeletal, immune system, neurological, and anti-neoplastic functions. Vitamin D supplementation has shown its benefit as prophylaxis and treatment during the coronavirus disease 2019 (COVID-19) pandemic and an increase in the prescribing of vitamin D supplementation has been observed. The intention of this review article is to provide guidance on the recommended dosage regimen as a prophylactic measure during COVID-19 and its use as a supplement in general. From this review article, it is clear that vitamin D has an important role to play not only in COVID-19 but also in various other health aspects of the human body.Contribution: This review article highlighted the role of vitamin D in managing vitamin D deficiency and its role as a supplement in the management of respiratory tract infections, especially COVID-19. This overview can assist physicians in optimising healthcare by optimised dosing recommendations and indications.
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Affiliation(s)
- Pheagane G Bopape
- Department of Clinical Pharmacy, Faculty of Health Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria.
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Bronkhorst E, Hattingh S, Poka M. Antiretroviral stewardship in a tertiary academic hospital: The need for a clinical pharmacist. Health SA 2023; 28:2135. [PMID: 38633911 PMCID: PMC11022499 DOI: 10.4102/hsag.v28i0.2135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 01/17/2023] [Indexed: 04/19/2024] Open
Abstract
Background South Africa has the highest prevalence of people living with HIV globally. Although antiretroviral therapy provides solutions, evidence of antiretroviral resistance emerged, requiring the application of antiretroviral-stewardship programmes to curb medication-related problems. Aim Identify and describe antiretroviral-stewardship pharmacist interventions in an active antiretroviral-stewardship programme. Setting HIV-positive adults admitted to medical wards at a tertiary academic hospital in South Africa. Methods A descriptive quantitative study was performed, utilising an antiretroviral-stewardship assessment tool to determine antiretroviral-related recommendations in the treatment of HIV-positive adults. The study employed purposive sampling. Treatment charts were evaluated to identify antiretroviral-stewardship recommendations. The number of recommendations highlighted the need for a clinical pharmacist in an active antiretroviral-stewardship programme. Descriptive data analysis with Pearson correlations was employed to display the data. Results Medication-related problems were identified in 100% of study patients (n = 41), with an average of 2.46 interventions per patient. One-hundred-and-one medication-related problems were identified by using the antiretroviral-stewardship assessment tool. The identified problems included a lack of viral load testing (41, 100%), lack of CD4 count monitoring (15; 36.6%) and lack of prophylactic treatment against opportunistic infections (10; 24.4%). Medication-related problems included the presence of clinically significant drug-drug interactions and serious side effects, CD4 count decline despite being on antiretroviral therapy, unnecessary treatment interruptions including risk for IRIS, inappropriate antiretroviral therapy regimen, non-adherence and absence of treating tuberculosis as co-morbidity. Conclusion Present study demonstrates the need of an active antiretroviral-stewardship programme's benefits. The possible role of the clinical pharmacist as active participant and leader in this programme is highlighted. Contribution Highlight the role of clinical pharmacists in antiretroviral stewardship.
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Affiliation(s)
- Elmien Bronkhorst
- School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria, South Africa
| | - Sonja Hattingh
- School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria, South Africa
| | - Madan Poka
- School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria, South Africa
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Amang À Ngnoung GA, Sidjui LS, Leutcha PB, Nganso Ditchou YO, Tchokouaha LRY, Herbette G, Baghdikian B, Kowa TK, Soh D, Kemzeu R, Poka M, Demana PH, Siwe Noundou X, Tchinda AT, Fekam Boyom F, Lannang AM, Nyassé B. Antileishmanial and Antiplasmodial Activities of Secondary Metabolites from the Root of Antrocaryon klaineanum Pierre (Anacardiaceae). Molecules 2023; 28:molecules28062730. [PMID: 36985700 PMCID: PMC10059057 DOI: 10.3390/molecules28062730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 03/06/2023] [Accepted: 03/15/2023] [Indexed: 03/30/2023] Open
Abstract
Antrocaryon klaineanum is traditionally used for the treatment of back pain, malaria, female sterility, chlamydiae infections, liver diseases, wounds, and hemorrhoid. This work aimed at investigating the bioactive compounds with antileishmanial and antiplasmodial activities from A. klaineanum. An unreported glucocerebroside antroklaicerebroside (1) together with five known compounds (2-6) were isolated from the root barks of Antrocaryon klaineanum using chromatographic techniques. The NMR, MS, and IR spectroscopic data in association with previous literature were used for the characterization of all the isolated compounds. Compounds 1-4 are reported for the first time from A. klaineanum. The methanol crude extract (AK-MeOH), the n-hexane fraction (AK-Hex), the dichloromethane fraction (AK-DCM), the ethyl acetate fraction (AK-EtOAc), and compounds 1-6 were all evaluated for their antiparasitic effects against Plasmodium falciparum strains susceptible to chloroquine (3D7), resistant to chloroquine (Dd2), and promastigotes of Leishmania donovani (MHOM/SD/62/1S). The AK-Hex, AK-EtOAc, AK-MeOH, and compound 2 were strongly active against Dd2 strain with IC50 ranging from 2.78 ± 0.06 to 9.30 ± 0.29 µg/mL. Particularly, AK-MeOH was the most active-more than the reference drugs used-with an IC50 of 2.78 ± 0.06 µg/mL. The AK-EtOAc as well as all the tested compounds showed strong antileishmanial activities with IC50 ranging from 4.80 ± 0.13 to 9.14 ± 0.96 µg/mL.
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Affiliation(s)
- Gabrielle Ange Amang À Ngnoung
- Department of Chemistry, Faculty of Science, University of Maroua, Maroua P.O. Box 814, Cameroon
- Laboratory of Phytochemistry, Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, Yaoundé P.O. Box 13033, Cameroon
| | - Lazare S Sidjui
- Laboratory of Phytochemistry, Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, Yaoundé P.O. Box 13033, Cameroon
- Bioorganic and Medicinal Chemistry Laboratory, Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé P.O. Box 812, Cameroon
| | - Peron B Leutcha
- Department of Chemistry, Faculty of Science, University of Maroua, Maroua P.O. Box 814, Cameroon
- Natural Product and Environmental Chemistry Group (NAPEC), Department of Chemistry, Higher Teachers' Training College, University of Maroua, Maroua P.O. Box 55, Cameroon
| | - Yves O Nganso Ditchou
- Department of Chemistry, Faculty of Science, University of Maroua, Maroua P.O. Box 814, Cameroon
- Laboratory of Medicinal Chemistry & Pharmacognosy, Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé P.O. Box 812, Cameroon
| | - Lauve R Y Tchokouaha
- Laboratory of Pharmacology and Drugs Discovery, IMPM, Yaoundé P.O. Box 13033, Cameroon
| | - Gaëtan Herbette
- Aix-Marseille Univ, CNRS, Centrale Marseille, FSCM, Spectropole, Campus de St Jérôme-Service 511, 13397 Marseille, France
| | - Beatrice Baghdikian
- Aix Marseille Univ, CNRS 7263, IRD 237, Avignon Université, IMBE, 27 Blvd Jean Moulin, Service of Pharmacognosy, Faculty of Pharmacy, 13385 Marseille, France
| | - Theodora K Kowa
- Laboratory of Phytochemistry, Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, Yaoundé P.O. Box 13033, Cameroon
| | - Desire Soh
- Laboratory of Medicinal Chemistry & Pharmacognosy, Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé P.O. Box 812, Cameroon
- Department of Chemistry, Higher Teacher Training College Bambili, The University of Bamenda, Bambili, Bamenda P.O. Box 39, Cameroon
| | - Raoul Kemzeu
- Antimicrobial and Biocontrol Agents Unit, Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, Faculty of Science, University of Yaounde 1, Yaounde P.O. Box 812, Cameroon
| | - Madan Poka
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa
| | - Patrick H Demana
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa
| | - Xavier Siwe Noundou
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa
| | - Alembert T Tchinda
- Laboratory of Phytochemistry, Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, Yaoundé P.O. Box 13033, Cameroon
| | - Fabrice Fekam Boyom
- Antimicrobial and Biocontrol Agents Unit, Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, Faculty of Science, University of Yaounde 1, Yaounde P.O. Box 812, Cameroon
| | - Alain M Lannang
- Natural Product and Environmental Chemistry Group (NAPEC), Department of Chemistry, Higher Teachers' Training College, University of Maroua, Maroua P.O. Box 55, Cameroon
- Department of Chemical Engineering, School of Chemical Engineering and Mineral Industries, University of Ngaoundere, Ngaoundere P.O. Box 454, Cameroon
| | - Barthélemy Nyassé
- Laboratory of Medicinal Chemistry & Pharmacognosy, Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé P.O. Box 812, Cameroon
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Messi AN, Bonnet SL, Owona BA, Wilhelm A, Kamto ELD, Ndongo JT, Siwe-Noundou X, Poka M, Demana PH, Krause RWM, Ngo Mbing J, Pegnyemb DE, Bochet CG. In Vitro and In Silico Potential Inhibitory Effects of New Biflavonoids from Ochna rhizomatosa on HIV-1 Integrase and Plasmodium falciparum. Pharmaceutics 2022; 14:pharmaceutics14081701. [PMID: 36015326 PMCID: PMC9414862 DOI: 10.3390/pharmaceutics14081701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/05/2022] [Accepted: 08/11/2022] [Indexed: 11/17/2022] Open
Abstract
The aim of this study was to identify bioactive secondary metabolites from Ochna rhizomatosa with potential inhibitory effects against HIV and Plasmodium falciparum. A phytochemical study of O. rhizomatosa root barks resulted in the identification of three new biflavonoids (1–3), along with four known ones (4–7). Compound 7 (Gerontoisoflavone A) was a single flavonoid present in the rootbark of the plant and was used as a reference. Compound 1 (IC50 = 0.047 µM) was the only one with a noteworthy inhibitory effect against HIV-1 integrase in vitro. Chicoric acid (IC50 = 0.006 µM), a pure competitive inhibitor of HIV-1 integrase, was used as control. Compound 2 exhibited the highest antiplasmodial activity (IC50 = 4.60 µM) against the chloroquine-sensitive strain of Plasmodium falciparum NF54. Computational molecular docking revealed that compounds 1 and 2 had the highest binding score (−121.8 and −131.88 Kcal/mol, respectively) in comparison to chicoric acid and Dolutegravir (−116 and −100 Kcal/mol, respectively), towards integrase receptor (PDB:3LPT). As far as Plasmodium-6 cysteine s48/45 domain inhibition is concerned, compounds 1 and 2 showed the highest binding scores in comparison to chloroquine, urging the analysis of these compounds in vivo for disease treatment. These results confirm the potential inhibitory effect of compounds 1 and 2 for HIV and malaria treatment. Therefore, our future investigation to find inhibitors of these receptors in vivo could be an effective strategy for developing new drugs.
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Affiliation(s)
- Angélique Nicolas Messi
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, Yaounde P.O. Box 812, Cameroon
- Department of Chemistry, University of the Free State, 205 Nelson Mandela Avenue, Bloemfontein 9301, South Africa
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg, Switzerland
- Correspondence: (A.N.M.); (X.S.-N.); Tel.: +237-679-12-46-58 (A.N.M.); +27-12-521-5647 (X.S.-N.)
| | - Susan Lucia Bonnet
- Department of Chemistry, University of the Free State, 205 Nelson Mandela Avenue, Bloemfontein 9301, South Africa
| | - Brice Ayissi Owona
- Department of Biochemistry, Faculty of Science, University of Yaounde I, Yaounde P.O. Box 812, Cameroon
| | - Anke Wilhelm
- Department of Chemistry, University of the Free State, 205 Nelson Mandela Avenue, Bloemfontein 9301, South Africa
| | - Eutrophe Le Doux Kamto
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, Yaounde P.O. Box 812, Cameroon
| | - Joseph Thierry Ndongo
- Department of Chemistry, Higher Teacher Training College, University of Yaounde 1, Yaounde P.O. Box 47, Cameroon
| | - Xavier Siwe-Noundou
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa
- Correspondence: (A.N.M.); (X.S.-N.); Tel.: +237-679-12-46-58 (A.N.M.); +27-12-521-5647 (X.S.-N.)
| | - Madan Poka
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa
| | - Patrick H. Demana
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa
| | - Rui W. M. Krause
- Nanomaterials and Medicinal Organic Chemistry Laboratory, Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa
| | - Joséphine Ngo Mbing
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, Yaounde P.O. Box 812, Cameroon
| | - Dieudonné Emmanuel Pegnyemb
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, Yaounde P.O. Box 812, Cameroon
| | - Christian G. Bochet
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg, Switzerland
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