TIME COURSE OF THE SECONDARY METABOLITE EXTRACT OF ALTERNARIA SP. GB8S
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This study examined the ability of the extract to inhibit biofilm formation by opportunistic bacterial strains Staphylococcus aureus,
Pseudomonas aeruginosa, and Candida albicans, with biofilm inhibition rates ranging from 75 to 78% at a concentration of 62.5
μg/ml. Using the same minimum concentration, the extract's antibiofilm activity was also studied over 6-72 hours to determine the
duration and sustainability of its inhibitory effect. These studies revealed that the extract isolated from isolate Gb8S retains its
activity for up to 24 hours after application, with inhibition rates ranging from 65 to 71%. Beginning after 36 hours of exposure, a
gradual decrease in activity to less than 60% was observed.
1. Rashmi M.M. Anti-quorum sensing and antibiofilm potential of Alternaria alternata, a foliar endophyte of Carica papaya,
evidenced by QS assays and in-silico analysis // Fungal Biology, V 122, Issue 10, Р. 998-1012. 2018. doi: 10.1016.
2. Andersen J.B., Rybtke M., Tolker-Nielsen T. The dynamics of biofilm development and dispersal should be taken into account
when quantifying biofilm via the crystal violet microtiter plate assay // Pub. Med, Biofilm, V. 8, P. 100207. 2024. doi: 10.1016.
3. Zago C. E. Dynamics of Biofilm Formation and the Interaction between Candida albicans and Methicillin-Susceptible
(MSSA) and - Resistant Staphylococcus aureus (MRSA) // PLoS One. 2015. V.10(4):e0123206. doi:
10.1371/journal.pone.0123206.
4. Ziemytė M., Carda-Dieguez M., Rodriguez-Diaz J. C., Ventero M. P., Mira A. Ferrer M. D. Real-time monitoring of
Pseudomonas aeruginosa biofilm growth dynamics and persister cells’ eradication // Emerg Microbes Infect, V. 10, Issue 1,
P. 2062-2075, doi: 10.1080/22221751. 2021. 1994355.
5. Caruso D.J., Palombo E.A., Moulton S.E., Duggan P.J., Zaferanloo B. Antibacterial and Antibiofilm Activity of Endophytic
Alternaria sp. Isolated from Eremophila longifolia // Antibiotics (Basel), V. 12, Issue. 9. P. 1459, 2023, doi:
10.3390/12091459.
6. Yuan Z., Tian Y., He F., Zhou H. Endophytes from Ginkgo biloba and their secondary metabolites, Chin Med, V. 14. P. 51,
2019, doi: 10.1186/s13020-019-0271-8.
7. Lang G., Blunt J.W., Cummings N.J., Cole A.L., Munro H.G. Hirsutide, a cyclic tetrapeptide from a spider-derived
entomopathogenic fungus, Hirsutella sp. // J. Nat Prod. V. 68, Issue 8, P. 1303-1305, 2005, doi: 10.1021/0501536.
8. Hazalin N.A., Ramasamy K., Lim S.M., Wahab I.A., Cole A.L., Abdul Majeed A.B. Cytotoxic and antibacterial activities of
endophytic fungi isolated from plants at the National Park, Pahang, Malaysia // BMC Complement Altern Med, V. 9, P. 46,
2009, doi: 10.1186/1472-6882-9-46.
9. Абдульмянова Л. И., Рузиева Д. М., Депсинов Р. И., Гулямова Т. Г. // Влияние экстракта Aloe vera на
антибактериальные свойства ассоциированных эндофитных грибов // Universum: химия и биология, Т. 1, Вып. 1
(115), С. 16ғ24, 2024.
10. Wiegand I., Hilpert K., Hancock R.E. Agar and broth dilution methods to determine the minimal inhibitory concentration
(MIC) of antimicrobial substances // Nat Protoc, V. 3, Issue. 2, P. 163-175. 2008, doi: 10.1038.
11. 12. Negri M., Gonçalves V., Silva S., Henriques M., Azeredo J., Oliveira R. Crystal violet staining to quantify Candida
adhesion to epithelial cells // J. Biomed Sci, V. 67, Issue. 3, P. 120-125, 2010, doi: 10.1080/09674845.
12. Andersen J.B., Rybtke M., Tolker-Nielsen T. The dynamics of biofilm development and dispersal should be taken into account
when quantifying biofilm via the crystal violet microtiter plate assay // Pub. Med, Biofilm, V. 8, P. 100207, 2024, doi: 10.1016.
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