Polysaccharides, Bacterial

Publication Title: 
The Journal of Contemporary Dental Practice

AIM: Many weapons are available in the arsenal of a dental professional to combat dental caries, which is almost ubiquitously present. From a public health perspective, most of these weapons are far from being an ideal drug. Hence, there is a demand for better and effective antibacterial agents. This factor stimulated the process of the present study. The aim of the study was to determine the effect of ethanol extract of Terminalia chebula on Streptococcus mutans. MATERIALS AND METHODS: Dried ripe fruits of Terminalia chebula were procured and powdered.

Author(s): 
Nayak, Sushma S.
Ankola, Anil V.
Metgud, Sharda C.
Bolmal, Uday Kumar
Publication Title: 
Toxicology and Applied Pharmacology

CD40 is a costimulatory molecule linking innate and adaptive immune responses to bacterial stimuli, as well as a critical regulator of functions of other costimulatory molecules. The mechanisms regulating lipopolysaccharide (LPS)-induced CD40 expression have not been adequately characterized in human monocytic cells. In this study we used a human monocytic cell line, THP-1, to investigate the possible mechanisms of CD40 expression following LPS exposure. Exposure to LPS resulted in a dose- and time-dependent increase in CD40 expression.

Author(s): 
Wu, Weidong
Alexis, Neil E.
Chen, Xian
Bromberg, Philip A.
Peden, David B.
Publication Title: 
Caries Research

Cranberry crude extracts, in various vehicles, have shown inhibitory effects on the formation of oral biofilms in vitro. The presence of proanthocyanidins (PAC) in cranberry extracts has been linked to biological activities against specific virulence attributes of Streptococcus mutans, e.g. the inhibition of glucosyltransferase (Gtf) activity. The aim of the present study was to determine the influence of a highly purified and chemically defined cranberry PAC fraction on S.

Author(s): 
Koo, H.
Duarte, S.
Murata, R. M.
Scott-Anne, K.
Gregoire, S.
Watson, G. E.
Singh, A. P.
Vorsa, N.
Publication Title: 
Cold Spring Harbor Perspectives in Medicine

Biofilm formation constitutes an alternative lifestyle in which microorganisms adopt a multicellular behavior that facilitates and/or prolongs survival in diverse environmental niches. Biofilms form on biotic and abiotic surfaces both in the environment and in the healthcare setting. In hospital wards, the formation of biofilms on vents and medical equipment enables pathogens to persist as reservoirs that can readily spread to patients. Inside the host, biofilms allow pathogens to subvert innate immune defenses and are thus associated with long-term persistence.

Author(s): 
Kostakioti, Maria
Hadjifrangiskou, Maria
Hultgren, Scott J.
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