Abstract
Purpose
Afrocantharellus platyphyllus (Heinem.) Tibuhwa (family Cantharellaceae) is a wild mushroom that is used for food and in the management of diseases by communities in Southern Tanzania. The current study investigated the safety and potential of the mushroom A. platyphyllus to yield active antimycobacterial compounds.
Methods
Preliminary safety evaluation was done using the brine shrimp lethality test (BST) and white albino mice. An 80% ethanolic extract of A. platyphyllus fruiting bodies was separated by using a liquid–liquid partitioning and the anti-mycobacteria compounds were isolated by column chromatography. The structures for isolated compounds were determined using Nuclear Magnetic Resonance (NMR) Spectroscopy.
Results
In the acute oral toxicity test none of the mice used showed any sign of toxicity during the 14 days’ observation. Similarly, the mushroom extract was mildly toxic to brine shrimps with LC50 of 61.94 μg/mL. The bioassay guided fractionation yielded two known compounds Cerevisetrol (1) and (22E, 24R)-Ergosta-5α, 6α-epoxy-8,22-diene-3β,7α-diol (2). These compounds were isolated for the first time from the genus Afrocantharellus and A. platyphyllus species were active against Mycobacteria with MICs ranging from 9.50 to 39.00 µg/mL against Mycobacterium indicus pranii (MIP), 19.00 to 78.00 µg/mL against Mycobacterium madagascariense (MM), 19.00 µg/mL to 78.00 µg/mL against a standard Mycobacterium tuberculosis strain (Mtb1) and 78.00 µg/mL to 312.00 µg/mL against a resistant clinical Mycobacterium isolate (Mtb2) against compounds 1 and 2 respectively.
Conclusion
A. platyphyllus, an edible mushroom yielded two known compounds with antimycobacterial properties which are potential scaffold for antimycobacterial drug design. These findings support further initiatives to evaluate other traditionally used mushrooms for antimycobacterial and other biological activities.
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Data Availability
Not applicable.
Abbreviations
- HIV:
-
Human immunodeficiency virus
- IRB:
-
Institutional review board
- AIDS:
-
Acquired Immunodefficiencey Syndrome
- SAR:
-
Structure activity relationship
- BST:
-
Brine shrimp lethality test
- COSY:
-
Correlated spectroscopy
- HMBC:
-
Heteronuclear multiple bond correlation
- TLC:
-
Thin layer chromatography
- OECD:
-
Organisation for economic co-operation
- FBDD:
-
Fragment-based drug design and development
- HSQC:
-
Heteronuclear single quantum coherence
- MIP:
-
Mycobacterium indicus pranii
- DAAD:
-
German academic exchange service
- MM:
-
Mycobacterium madagascariense
- Mtb:
-
Mycobacterium tuberculosis
- INT:
-
Iodonitrotetrazolium chloride salt
- ITM:
-
Institute of traditional medicine
- MA:
-
Mycobacterium aurum
- MIC:
-
Minimum inhibitory concentration
- MDR TB:
-
Multidrug resistant tuberculosis
- MUHAS:
-
Muhimbili university of health and allied sciences
- DMSO:
-
Dimethyl sulfoxide
- XDR TB:
-
Extensively drug resistant tuberculosis
- NMR:
-
Nuclear magnetic resonance
- TDR TB:
-
Totally drug resistant tuberculosis
- LC:
-
Lethality concentration
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Acknowledgements
The authors would like to express their appreciation to the German Academic Exchange Service (DAAD) for financial support to conduct this research work. Antimycobacterial activity screening against M. aurum was conducted by Ms Katlego Makale at Botswana University, we appreciate her service
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The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.
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MQ: Conducted the laboratory experiments and drafted the manuscript for this study. MQ, AAM, AIM and MM: Data curation, and analysis with technical support from FM, JS, and MH. The manuscript was reviewed by MJM and VM. MM supported the design of the study, review of results and edited drafts of the manuscript. The manuscript is approved by all authors before submission for publication.
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Qwarse, M., Marealle, A.I., Machumi, F. et al. Exploring the Therapeutic Potential of Wild Edible Mushrooms: Safety Evaluation and Isolation of Antimycobacterial Sterols from Afrocantharellus platyphyllus (Heinem.) Tibuhwa. Chemistry Africa 7, 661–670 (2024). https://doi.org/10.1007/s42250-023-00765-6
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DOI: https://doi.org/10.1007/s42250-023-00765-6