Antifungal, antiaflatoxigenic, and cytotoxic properties of bioactive secondary metabolites derived from Bacillus species

Bibliographic Information
Authors: Abdel-Nasser A.; Badr A.N.; Fathy H.M.; Ghareeb M.A.; Barakat O.S.; Hathout A.S.
Journal: Scientific Reports
Publisher: Nature Research
Publication Date: 18 July 2024
Volume / Issue: Volume 14 / Issue 1
Article No.: 16590
ISSN: 20452322
DOI: 10.1038/s41598-024-66700-y
Scopus: View on Scopus
PubMed: 39025896
Document Type: Article
Access: All Open Access; Gold Open Access; Green Open Access
Authors and Affiliations
Abdel-Nasser A., Food Toxicology and Contaminants Department, Food Industry and Nutrition Research Institute, National Research Centre, Dokki, Cairo, 12622, Egypt; Badr A.N., Food Toxicology and Contaminants Department, Food Industry and Nutrition Research Institute, National Research Centre, Dokki, Cairo, 12622, Egypt; Fathy H.M., Agricultural Microbiology Department, Faculty of Agriculture, Cairo University, Giza, Egypt; Ghareeb M.A., Medicinal Chemistry Department, Theodor Bilharz Research Institute, (P.O. 30), Kornaish El Nile, Warrak El-Haddar, Imbaba, Giza, 12411, Egypt; Barakat O.S., Agricultural Microbiology Department, Faculty of Agriculture, Cairo University, Giza, Egypt; Hathout A.S., Food Toxicology and Contaminants Department, Food Industry and Nutrition Research Institute, National Research Centre, Dokki, Cairo, 12622, Egypt
Abstract
Aflatoxins (AFs) are hazardous carcinogens and mutagens produced by some molds, particularly Aspergillus spp. Therefore, the purpose of this study was to isolate and identify endophytic bacteria, extract and characterize their bioactive metabolites, and evaluate their antifungal, antiaflatoxigenic, and cytotoxic efficacy against brine shrimp (Artemia salina) and hepatocellular carcinoma (HepG2). Among the 36 bacterial strains isolated, ten bacterial isolates showed high antifungal activity, and thus were identified using biochemical parameters and MALDI-TOF MS. Bioactive metabolites were extracted from two bacterial isolates, and studied for their antifungal activity. The bioactive metabolites (No. 4, and 5) extracted from Bacillus cereus DSM 31T DSM, exhibited strong antifungal capabilities, and generated volatile organic compounds (VOCs) and polyphenols. The major VOCs were butanoic acid, 2-methyl, and 9,12-Octadecadienoic acid (Z,Z) in extracts No. 4, and 5 respectively. Cinnamic acid and 3,4-dihydroxybenzoic acid were the most abundant phenolic acids in extracts No. 4, and 5 respectively. These bioactive metabolites had antifungal efficiency against A. flavus and caused morphological alterations in fungal conidiophores and conidiospores. Data also indicated that both extracts No. 4, and 5 reduced AFB1 production by 99.98%. On assessing the toxicity of bioactive metabolites on A. salina the IC50 recorded 275 and 300 µg/mL, for extracts No. 4, and 5 respectively. Meanwhile, the effect of these extracts on HepG2 revealed that the IC50 of extract No. 5 recorded 79.4 µg/mL, whereas No. 4 showed no cytotoxic activity. It could be concluded that bioactive metabolites derived from Bacillus species showed antifungal and anti-aflatoxigenic activities, indicating their potential use in food safety. © The Author(s) 2024.
Keywords
Antiaflatoxigenic activity; Antifungal activity; Bacillus species; Bioactive metabolites; Brine shrimp bioassay; Hepatocellular carcinoma; Aflatoxins; Animals; Antifungal Agents; Artemia; Bacillus; Bacillus cereus; Hep G2 Cells; Humans; Microbial Sensitivity Tests; Secondary Metabolism; Volatile Organic Compounds; aflatoxin; antifungal agent; volatile organic compound; animal; chemistry; drug effect; Hep-G2 cell line; human; metabolism; microbial sensitivity test
Citation Information
Scopus Citations: 32
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