Unique Features of Mycobacterium abscessus Biofilms Formed in Synthetic Cystic Fibrosis Medium
| Autor: | Juan M. Belardinelli, Wei Li, Charlotte Avanzi, Shiva K. Angala, Elena Lian, Crystal J. Wiersma, Zuzana Palčeková, Kevin H. Martin, Bhanupriya Angala, Vinicius C. N. de Moura, Callan Kerns, Victoria Jones, Mercedes Gonzalez-Juarrero, Rebecca M. Davidson, Jerry A. Nick, Bradley R. Borlee, Mary Jackson |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Microbiology (medical)
Multidrug tolerance Population antibiotic tolerance Mycobacterium abscessus Microbiology Cystic fibrosis biofilm Extracellular matrix lipid medicine Extracellular education Original Research education.field_of_study biology Chemistry Biofilm medicine.disease biology.organism_classification QR1-502 polysaccharide extracellular DNA Mycobacterium |
| Zdroj: | Frontiers in Microbiology 12:743126 Frontiers in Microbiology Frontiers in Microbiology, Vol 12 (2021) |
| ISSN: | 1664-302X |
| Popis: | Characterizing Mycobacterium abscessus complex (MABSC) biofilms under host-relevant conditions is essential to the design of informed therapeutic strategies targeted to this persistent, drug-tolerant, population of extracellular bacilli. Using synthetic cystic fibrosis medium (SCFM) which we previously reported to closely mimic the conditions encountered by MABSC in actual cystic fibrosis (CF) sputum and a new model of biofilm formation, we show that MABSC biofilms formed under these conditions are substantially different from previously reported biofilms grown in standard laboratory media in terms of their composition, gene expression profile and stress response. Extracellular DNA (eDNA), mannose-and glucose-containing glycans and phospholipids, rather than proteins and mycolic acids, were revealed as key extracellular matrix (ECM) constituents holding clusters of bacilli together. None of the environmental cues previously reported to impact biofilm development had any significant effect on SCFM-grown biofilms, most likely reflecting the fact that SCFM is a nutrient-rich environment in which MABSC finds a variety of ways of coping with stresses. Finally, molecular determinants were identified that may represent attractive new targets for the development of adjunct therapeutics targeting MABSC biofilms in persons with CF. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|