Bacterial extracellular polymeric substances as potential saliva substitute.
bacteria
biotechnology
extracellular polymeric substance matrix
lubrication
rheology
xerostomia
Journal
FEMS microbiology letters
ISSN: 1574-6968
Titre abrégé: FEMS Microbiol Lett
Pays: England
ID NLM: 7705721
Informations de publication
Date de publication:
01 04 2022
01 04 2022
Historique:
received:
14
12
2021
revised:
26
01
2022
accepted:
16
03
2022
pubmed:
22
3
2022
medline:
6
4
2022
entrez:
21
3
2022
Statut:
ppublish
Résumé
This proof-of-principle study aims to find commensal oral bacteria that can produce extracellular polymeric substances (EPS), which have similar lubrication properties to saliva and could serve as saliva substitutes. Saliva and plaque samples were collected from 21 generally healthy individuals. Primary screening was done by conventional culturing and Gram-staining; all species selected for further analysis were identified by MALDI-TOF and deposited in DSMZ. Lactobacillus gasseri (DSM32453 and DSM32455), Lactobacillus rhamnosus (DSM32452), Lactobacillus paracasei (DSM32454), and Streptococcus sanguinis (DSM32456) produced 413.6, 415.7, 431.1, 426.8, and 877.6 µg/ml of EPS, respectively. At the same time calcium dissolution could not be detected for both L. gasseri strains, minimal dissolution for the other three: S. sanguinis 0.3 mm, and 3.7 mm for L. rhamnosus and L. paracasei. There were no differences found between the EPS samples and the saliva for the effect of shear rate on the viscosity and for the effect of sliding speed on lubrication properties. In conclusion, five commensal bacterial strains have been isolated, all able to produce EPS and lead to no or to low calcium dissolution. EPS produced exhibits rheological and tribological properties comparable to human saliva. A total of four out of five selected strains are probiotic and, therefore, may exhibit additional beneficial influence within the oral cavity.
Identifiants
pubmed: 35311987
pii: 6551309
doi: 10.1093/femsle/fnac028
pmc: PMC8973907
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© The Author(s) 2022. Published by Oxford University Press on behalf of FEMS.
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