Article (Scientific journals)
Chemical constituents and antibacterial activities of Cameroonian dark brown propolis against potential biofilm-forming bacteria.
Sakava, Paul; Nyemb, Jean Noël; Matchawe, Chelea et al.
2026In Natural Product Research, 40 (7), p. 1829 - 1842
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Keywords :
Cameroonian propolis; Triterpenoids; antibacterial activities; biofilm-forming bacteria; chemical constituents; gram-negative; gram-positive; Propolis; Anti-Bacterial Agents; Pentacyclic Triterpenes; lupeol; beta-amyrin; Xanthones; Hexanes; Lupanes; Oleanolic Acid; Cameroon; Microbial Sensitivity Tests; Methicillin-Resistant Staphylococcus aureus/drug effects; Pentacyclic Triterpenes/chemistry; Pentacyclic Triterpenes/pharmacology; Pentacyclic Triterpenes/isolation & purification; Molecular Structure; Klebsiella pneumoniae/drug effects; Gram-Positive Bacteria/drug effects; Gram-Negative Bacteria/drug effects; Xanthones/chemistry; Xanthones/pharmacology; Xanthones/isolation & purification; Hexanes/chemistry; Animals; Oleanolic Acid/analogs & derivatives; Propolis/chemistry; Propolis/pharmacology; Anti-Bacterial Agents/pharmacology; Anti-Bacterial Agents/chemistry; Anti-Bacterial Agents/isolation & purification; Biofilms/drug effects; Analytical Chemistry; Biochemistry; Plant Science; Organic Chemistry
Abstract :
[en] Propolis is a resinous material collected by different bee species from various plant exudates and used to seal holes in honeycombs, smoothen the internal walls, embalm intruders, improve health and prevent diseases. From its n-hexane extract, eight compounds were isolated and characterised as: mangiferonic acid (1); 1-hydroxymangiferonic acid (2), new natural product; mangiferolic acid(3); 27-hydroxymangiferolic acid (4), reported here for the first time as propolis constituent; 27-hydroxymangiferonic acid (5); α-amyrin (6); β-amyrin (7) and lupeol (8). The chemical structures of the isolated compounds were elucidated using spectroscopic methods, such as 1D and 2D-NMR, mass spectrometry and comparison with previous published reports. Compounds 6-8 and n-hexane extract were tested against Gram-negative and Gram-positive bacteria strains using agar disc diffusion and macrodilution techniques. Interestingly, n-hexane extract and compounds 6-8 had good inhibitory activities against Methicillin Resistant Staphylococcus aureus (MRSA) and the clinical Klebsiella pneumoniae isolates. The biological effects of n-hexane extract and its fraction against K. pneumoniae 12 CM and MRSA revealed in the present study suggest that the Cameroonian dark brown propolis could be a potential alternative management of biofilms on medical devices and respiratory skin or infections.
Disciplines :
Chemistry
Author, co-author :
Sakava, Paul ;  Department of Chemistry, Higher Teacher Training College, The University of Bamenda, Bambili, Cameroon ; Natural Substances and Valorization Laboratory, Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
Nyemb, Jean Noël ;  Department of Refining and Petrochemistry, National Advanced School of Mines and Petroleum Industries, University of Maroua, Kaélé, Cameroon
Matchawe, Chelea;  Institute of Medical Research and Medicinal Plants Studies (IMPM), Ministry of the Scientific Research and innovation, Yaounde, Cameroon ; The University Institute of International Development, Mokolo, Far North, Cameroon
Kumcho, Mangum Patience;  School of Health Sciences, Catholic University of Central Africa, Yaounde, Cameroon
Tagatsing, Maurice Fotsing;  Natural Substances and Valorization Laboratory, Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
Nsawir, Bonglaisin J;  Institute of Medical Research and Medicinal Plants Studies (IMPM), Ministry of the Scientific Research and innovation, Yaounde, Cameroon
Talla, Emmanuel;  School of Chemical Engineering and Mineral Industries, University of Ngaoundere, Ngaoundere, Cameroon ; Department of chemistry, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
Atchadé, Alex De Théodore;  Natural Substances and Valorization Laboratory, Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
Laurent, Sophie  ;  Université de Mons - UMONS > Faculté de Médecine et de Pharmacie > Service de Chimie générale, organique et biomédicale
Henoumont, Céline  ;  Université de Mons - UMONS > Faculté de Médecine et de Pharmacie > Service de Chimie générale, organique et biomédicale
Language :
English
Title :
Chemical constituents and antibacterial activities of Cameroonian dark brown propolis against potential biofilm-forming bacteria.
Publication date :
April 2026
Journal title :
Natural Product Research
ISSN :
1478-6419
eISSN :
1478-6427
Publisher :
Taylor and Francis Ltd., England
Volume :
40
Issue :
7
Pages :
1829 - 1842
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
M108 - Chimie générale, organique et biomédicale
Research institute :
R550 - Institut des Sciences et Technologies de la Santé
R100 - Institut des Biosciences
Funding text :
The authors are grateful for the ARC (AUWB-2010\u201410/15UMONS-5), FNRS, ENCITE program, COST TD1004 (Theranostics imaging and therapy: an action to develop novel nanosized systems for imaging-guided drug delivery), UIAP VII program, European Network of Excellence EMIL (European Molecular Imaging Laboratories) program LSCH-2004503569 and the Center for Microscopy and Molecular Imaging (CMMI, supported by the European Regional Development Fund and the Walloon Region).
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