scholarly journals Targeted Killing of Streptococcus mutans by a Pheromone-Guided “Smart” Antimicrobial Peptide

2006 ◽  
Vol 50 (11) ◽  
pp. 3651-3657 ◽  
Author(s):  
Randal Eckert ◽  
Jian He ◽  
Daniel K. Yarbrough ◽  
Fengxia Qi ◽  
Maxwell H. Anderson ◽  
...  
Keyword(s):  
Antimicrobial Peptide ◽  
Streptococcus Mutans ◽  
Targeted Delivery ◽  
Wide Spectrum ◽  
Oral Streptococci ◽  
Normal Flora ◽  
Targeted Killing ◽  
Amino Acid Region ◽  
Clinical Consequences ◽  
Species Specific

ABSTRACT Within the repertoire of antibiotics available to a prescribing clinician, the majority affect a broad range of microorganisms, including the normal flora. The ecological disruption resulting from antibiotic treatment frequently results in secondary infections or other negative clinical consequences. To address this problem, our laboratory has recently developed a new class of pathogen-selective molecules, called specifically (or selectively) targeted antimicrobial peptides (STAMPs), based on the fusion of a species-specific targeting peptide domain with a wide-spectrum antimicrobial peptide domain. In the current study, we focused on achieving targeted killing of Streptococcus mutans, a cavity-causing bacterium that resides in a multispecies microbial community (dental plaque). In particular, we explored the possibility of utilizing a pheromone produced by S. mutans, namely, the competence stimulating peptide (CSP), as a STAMP targeting domain to mediate S. mutans-specific delivery of an antimicrobial peptide domain. We discovered that STAMPs constructed with peptides derived from CSP were potent against S. mutans grown in liquid or biofilm states but did not affect other oral streptococci tested. Further studies showed that an 8-amino-acid region within the CSP sequence is sufficient for targeted delivery of the antimicrobial peptide domain to S. mutans. The STAMPs presented here are capable of eliminating S. mutans from multispecies biofilms without affecting closely related noncariogenic oral streptococci, indicating the potential of these molecules to be developed into “probiotic” antibiotics which could selectively eliminate pathogens while preserving the protective benefits of a healthy normal flora.

Stamps-smart Bombs To Streptococcus Mutans

2012 ◽  
Vol 4 (1) ◽  
pp. 16-18
Author(s):  
V.V. Subba Reddy ◽  
Sathyajith Naik ◽  
R. Krishnakumar ◽  
S. Srinivasan
Keyword(s):  
Wide Spectrum ◽  
Oral Diseases ◽  
New Class ◽  
Specific Targeting ◽  
Microbial Biofilms ◽  
Secondary Infections ◽  
Clinical Consequences ◽  
Targeting Peptide ◽  
Bacterial Film ◽  
Species Specific

Abstract Plaque on the surface of the tooth consists of a bacterial film that produces acids as a by-product of its metabolism. To be specific, certain bacteria within the oral diseases, such as dental caries and periodontal disease, should be considered as consequences of ecologically driven imbalances of oral microbial biofilms. The ecological disruption resulting from antibiotic treatment frequently results in secondary infections or other negative clinical consequences. To address this problem, researchers have recently developed a new class of pathogen-selective molecules, called specifically (or selectively) targeted antimicrobial peptides (STAMPs), and based on the fusion of a species-specific targeting peptide domain with a wide-spectrum antimicrobial peptide domain.

Potential Antimicrobial Peptides Elucidation From The Marine Bacteria

2020 ◽  
Vol 18 ◽  
Author(s):  
Adyasa Barik ◽  
Pandiyan Rajesh ◽  
Manthiram Malathi ◽  
Vellaisamy Balasubramanian
Keyword(s):  
Antimicrobial Peptide ◽  
Marine Bacteria ◽  
Unnatural Amino Acids ◽  
Wide Spectrum ◽  
Drug Resistant ◽  
Medical Field ◽  
The World ◽  
Pathogenic Microbes ◽  
Antimicrobial Peptide Resistance ◽  
Significant Attention

: In recent years, over use of antibiotics has been raising its head to a serious problem all around the world as pathogens become drug resistant and create challenges to the medical field. This failure of most potent antibiotics that kill pathogens increases the thirst for research to look further way of killing pathogens. It has been led to the findings of antimicrobial peptide which is the most potent peptide to destroy pathogens. This review gives special emphasis to the usage of marine bacteria and other microorganisms for antimicrobial peptide (AMP) which are eco friendly as well as a developing class of natural and synthetic peptides with a wide spectrum of targets to pathogenic microbes. Consequently, a significant attention has been paid mainly to (i) the structure and types of anti microbial peptides and (ii) mode of action and mechanism of antimicrobial peptide resistance to pathogens. In addition to this, the designing of AMPs has been analysed thoroughly for reducing toxicity and developing better potent AMP. It has been done by the modified unnatural amino acids by amidation to target the control of biofilm and persister cell.

scholarly journals Comparative genomic analyses of Streptococcus mutans provide insights into chromosomal shuffling and species-specific content

BMC Genomics ◽  
2009 ◽  
Vol 10 (1) ◽  
pp. 358 ◽  
Author(s):  
Fumito Maruyama ◽  
Mitsuhiko Kobata ◽  
Ken Kurokawa ◽  
Keishin Nishida ◽  
Atsuo Sakurai ◽  
...  
Keyword(s):  
Streptococcus Mutans ◽  
Comparative Genomic ◽  
Specific Content ◽  
Genomic Analyses ◽  
Species Specific

scholarly journals Inhaled antibiotics to improve efficacy and safety in the treatment of upper airway and lung inflammatory diseases

2021 ◽  
pp. 84-92
Author(s):  
Vladimir N. Drozdov ◽  
Konstantin I. Arefev ◽  
Svetlana Y. Serebrova ◽  
Irina A. Komissarenko ◽  
Evgenia V. Shikh ◽  
...  
Keyword(s):  
Antibiotic Therapy ◽  
Targeted Delivery ◽  
Whooping Cough ◽  
Inflammatory Diseases ◽  
Wide Spectrum ◽  
Chronic Obstructive ◽  
Combination Drug ◽  
Antibacterial Drugs ◽  
Systemic Antibiotic Therapy ◽  
Inhaled Antibiotics

Inhaled antibacterial drugs have been used since the 1940s with greater or lesser effectiveness, due to the possibility of targeted delivery of drugs directly to the infection site at concentrations higher than MICs. High local concentrations of antibacterial agents expand the possibilities of treating infections caused by multiresistant strains and reduces antibiotic resistance in the population. The inhaled delivery method is characterized by a high level of safety due to the absence of systemic toxic effects, which reduces the risk of pseudomembranous colitis and other complications of antibiotic therapy. Thiamphenicol glycinate acetylcysteinate is a combined drug that includes thiamphenicol and N-acetylcysteine, which causes its antibacterial and mucolytic activity. The results of clinical studies have demonstrated the effectiveness of TGA in the treatment of acute and chronic bronchitis, chronic obstructive pulmonary disease, community-acquired pneumonia, laryngotracheitis, rhinosinusitis and other infections of the upper and lower respiratory tract. In pediatrics, the drug is used to treat bronchitis and pneumonia, especially those that cannot be treated with other antibacterial drugs, bronchiolitis, whooping cough, and cystic fibrosis. The article presents data on the effectiveness and safety of containing TGA. A wide spectrum of antibacterial actions, the ability to form high local concentrations of antibacterial and mucolytic components in the focus of infection, a low risk of serious side effects in both adults and children are noted. The topical use of the combination drug has proven to be effective not only in bringing about a pronounced clinical improvement, but also in reducing the frequency of use of systemic antibiotic therapy. The efficacy of thiamphenicol glycinate acetylcysteinate is not inferior to macrolide antibiotics.

scholarly journals Antimicrobial peptide arrays for wide spectrum sensing of pathogenic bacteria

Talanta ◽  
2019 ◽  
Vol 203 ◽  
pp. 322-327 ◽  
Author(s):  
Éric Pardoux ◽  
Agnès Roux ◽  
Raphaël Mathey ◽  
Didier Boturyn ◽  
Yoann Roupioz
Keyword(s):  
Antimicrobial Peptide ◽  
Spectrum Sensing ◽  
Pathogenic Bacteria ◽  
Wide Spectrum ◽  
Peptide Arrays

scholarly journals Oral streptococci growth on aging and non-aging esthetic restorations after radiotherapy

2010 ◽  
Vol 21 (4) ◽  
pp. 346-350 ◽  
Author(s):  
Adriana D. da Cruz ◽  
Karina Cogo ◽  
Cristiane de C. Bergamaschi ◽  
Frab N. Bóscolo ◽  
Francisco C. Groppo ◽  
...  
Keyword(s):  
Streptococcus Mutans ◽  
Bacterial Biofilm ◽  
Oral Streptococci ◽  
Restorative Material ◽  
Biofilm Growth ◽  
Aged Group ◽  
Dental Resins ◽  
Colony Forming Units ◽  
Therapeutic Doses ◽  
Therapeutic Irradiation

The aim of this study was to examine Streptococcus mutans biofilm growth on both aged and non-aged restorative dental resins, which were submitted to therapeutic irradiation. Sixty-four disks of an esthetic restorative material (Filtek Supreme) were divided into 2 groups: aged group (AG) and a non-aged group (NAG). Each group was subdivided into 4 subgroups: non-irradiated and irradiated with 10Gy, 35Gy, and 70Gy. The biofilms were produced by Streptococcus mutans UA159 growing on both AG and NAG surfaces. The colony-forming units per mL (CFU/mL) were evaluated by the ANOVA and the Tukey LSD tests (α=0.05). AG presented smaller amounts of CFU/mL than the NAG before irradiation and after 10Gy of irradiation (p<0.05). AG irradiated with 35 and 70Gy showed increased amount of bacterial biofilm when compared to non-irradiated and 10Gy-irradiated disks (p<0.05). The exposure to ionizing radiation at therapeutic doses promoted changes in bacterial adherence of aged dental restorative material.

scholarly journals Streptococcal Antagonism in Oral Biofilms: Streptococcus sanguinis and Streptococcus gordonii Interference with Streptococcus mutans

2008 ◽  
Vol 190 (13) ◽  
pp. 4632-4640 ◽  
Author(s):  
Jens Kreth ◽  
Yongshu Zhang ◽  
Mark C. Herzberg
Keyword(s):  
Streptococcus Mutans ◽  
Bacterial Species ◽  
Ecological Factors ◽  
Oral Streptococci ◽  
Streptococcus Gordonii ◽  
Interspecies Interactions ◽  
Streptococcus Sanguinis ◽  
Production Of Hydrogen ◽  
Oral Biofilms ◽  
Competence System

ABSTRACT Biofilms are polymicrobial, with diverse bacterial species competing for limited space and nutrients. Under healthy conditions, the different species in biofilms maintain an ecological balance. This balance can be disturbed by environmental factors and interspecies interactions. These perturbations can enable dominant growth of certain species, leading to disease. To model clinically relevant interspecies antagonism, we studied three well-characterized and closely related oral species, Streptococcus gordonii, Streptococcus sanguinis, and cariogenic Streptococcus mutans. S. sanguinis and S. gordonii used oxygen availability and the differential production of hydrogen peroxide (H2O2) to compete effectively against S. mutans. Interspecies antagonism was influenced by glucose with reduced production of H2O2. Furthermore, aerobic conditions stimulated the competence system and the expression of the bacteriocin mutacin IV of S. mutans, as well as the H2O2-dependent release of heterologous DNA from mixed cultures of S. sanguinis and S. gordonii. These data provide new insights into ecological factors that determine the outcome of competition between pioneer colonizing oral streptococci and the survival mechanisms of S. mutans in the oral biofilm.

Prevalence of Five Biofilm-Related Oral Streptococci Species from Plaque

2011 ◽  
Vol 36 (2) ◽  
pp. 161-166 ◽  
Author(s):  
Kemthong Mitrakul ◽  
Yuwadee Asvanund ◽  
Kudkao Vongsavan
Keyword(s):  
Early Childhood Caries ◽  
Oral Streptococci ◽  
Caries Prevalence ◽  
Specific Primers ◽  
Chi Square ◽  
High Prevalence ◽  
Chi Square Test ◽  
Species Specific ◽  
The Relationship ◽  
Severe Early Childhood Caries

Objective: To examine the prevalence of five oral streptococci species of severe early childhood caries (S-ECC) and caries-free (CF) groups. Study design: Supra gingival plaque samples were obtained from 198 Thai children with ages ranging from one to six years old. Eighty-seven subjects had no caries (dmft=0), and 111 had S-ECC. After DNA extraction, S. mutans, S. sobrinus, S. sanguinis, S. oralis, and S. gordonii were identified by standard PCR using species-specific primers. Statistical analysis determined the differences among prevalence rates of each species using Pearson chi-square test. The relationship among dmft score, age, sex and caries status within each group was analyzed by logistical regression (p ≤ 0.05). Results: Sex was not correlated with any of the species detected in both groups (mean age =3.09, mean±SD of dmft=11.04±7.89). S. mutans was found at greatest prevalence in both groups followed by S. oralis. S. gordonii was detected at a high prevalence, but S. sobrinus and S. sanguinis were lower in S-ECC when compared with those from the CF group. Conclusion: S. mutans was associated significantly with S-ECC (p ≤ 0.05). Caries prevalence was highest (56.5%) in subjects infected by S. mutans alone. S. sanguinis prevalence was higher in the CF group, but not statiscally different. Infection with MS did not show higher caries prevalence.

scholarly journals Antimicrobial peptide GH12 targets Streptococcus mutans to arrest caries development in rats

2018 ◽  
Vol 11 (1) ◽  
pp. 1549921 ◽  
Author(s):  
Yufei Wang ◽  
Yuhao Zeng ◽  
Yuanjing Wang ◽  
Haoran Li ◽  
Sihan Yu ◽  
...  
Keyword(s):  
Antimicrobial Peptide ◽  
Streptococcus Mutans
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