Results 61 to 70 of about 7,042 (196)

Atypical chemoreceptor arrays accommodate high membrane curvature

Nature Communications, 2020
The main components of the prokaryotic chemotaxis system, chemoreceptors, organize into a hexagonal (P6 symmetry) extended array. Here authors use cryo-ET and report an alternative symmetry (P2) of the chemotaxis apparatus that emerges from a strict ...
Alise R. Muok, Davi R. Ortega, Kurni Kurniyati, Wen Yang, Zachary A. Maschmann, Adam Sidi Mabrouk, Chunhao Li, Brian R. Crane, Ariane Briegel   +8 more
doaj   +1 more source

Effects of Hibiscus sabdariffa L. extract on multispecies Porphyromonas gingivalis and Treponema denticola biofilms in vitro

Scientific Dental Journal, 2023
Background: Porphyromonas gingivalis and Treponema denticola are bacteria that play a crucial role in periodontitis. Hibiscus sabdariffa L. contains flavonoids, alkaloids, saponins, and tannins; compounds which are expected to inhibit biofilm formation ...
Angela Winson, Trijani Suwandi, Olivia Nauli Komala   +2 more
doaj   +1 more source

Differences in the Gastric Microbiotas of Neighboring Populations With Divergent Risks of Gastric Cancer

Journal of Gastroenterology and Hepatology, EarlyView.
ABSTRACT Background Although Helicobacter pylori plays a central role in gastric cancer (GC), other microorganisms involved in gastric dysbiosis may also impact carcinogenesis. We aimed to characterize gastric dysbiosis and its role in the transition from non‐atrophic gastritis (NAG) to gastric premalignant lesions (GPLs) in two populations from Nariño,
Juan Camilo Caguazango, Karla Vinasco, Isidora Simovic, Yomaira Yépez Caicedo, Marino Coral Bedoya, Nadeem O. Kaakoush, Natalia Castaño‐Rodríguez   +6 more
wiley   +1 more source

Treponema denticola: patógeno en procesos periodontales y pulpares

Odontología Sanmarquina, 2012
En la etiología multifactorial de la enfermedad periodontal y procesos pulpares, el factor bacteriano tiene gran relevancia. En estos procesos se identifica una flora polimicrobiana en la que destaca Treponema denticola, una espiroqueta con múltiples ...
Donald Ramos Perfecto, Mario Julio Ávila Campos, Victor Levano Torres   +2 more
doaj   +1 more source

Systemic, Lifestyle and Environmental Modifying Factors in the Pathogenesis of Periodontitis

Journal of Periodontal Research, EarlyView.
A variety of impacting factors in the pathogenesis of periodontitis exist, including systemic, lifestyle, and environmental factors. This review highlights the manifold mechanistic aspects of the link between the pathogenesis of periodontitis, addressing these numerous factors to supplement the long‐standing knowledge of the progression of the disease.
Sabine Elisabeth Groeger, Yuxi Zhou, Jiawen Yong, Lei Wang, Sabine Ruf, Joerg Meyle   +5 more
wiley   +1 more source

Metagenomic analysis reveals presence of Treponema denticola in a tissue biopsy of the Iceman. [PDF]

PLoS ONE, 2014
Ancient hominoid genome studies can be regarded by definition as metagenomic analyses since they represent a mixture of both hominoid and microbial sequences in an environment.
Frank Maixner, Anton Thomma, Giovanna Cipollini, Stefanie Widder, Thomas Rattei, Albert Zink   +5 more
doaj   +1 more source

Stem Cells From Dental Pulp, Periodontal Tissues, and Other Oral Sources: Biological Concepts and Regenerative Potential

Journal of Periodontal Research, EarlyView.
A graphical abstract recapping the different sources of dental, periodontal, and other oral‐derived mesenchymal stromal cells (MSCs) and their regenerative mechanisms and potentials. The review's article findings bridge fundamental biological science with translational advances, highlighting the significance of MSCs in craniofacial regenerative ...
Karim M. Fawzy El‐Sayed, Sara El Moshy, Israa Ahmed Radwan, Dina Rady, Aiah A. El‐Rashidy, Marwa M. S. Abbass, Christof E. Dörfer   +6 more
wiley   +1 more source

The Keystone‐Pathogen Hypothesis Updated: The Role of Porphyromonas gingivalis in Periodontitis

Journal of Periodontal Research, EarlyView.
Porphyromonas gingivalis orchestrates a coordinated manipulation of immune and inflammatory responses in periodontal tissues which leads to the generation of a dysbiotic, subgingival biofilm community, and progression of periodontitis. The type 9 secretion system, lipid A modification, and the formation of outer membrane vesicles are important ...
Mike A. Curtis, James A. Garnett, Richard P. Darveau   +2 more
wiley   +1 more source

Periodontitis and Inflammatory Bowel Diseases: Mechanistic Evidence

Journal of Periodontal Research, EarlyView.
This review aims to provide a conceptual framework for understanding the mechanistic interplay between periodontitis and IBD, with a particular emphasis on the microbial and immunological crosstalk linking the oral cavity and the gastrointestinal tract.
Ana Paula V. Colombo, Adriana M. de Oliveira, Nobuhiko Kamada, Sho Kitamoto   +3 more
wiley   +1 more source

Structure and Mechanism of Ergothionase from Treponema denticola [PDF]

Chemistry – A European Journal, 2019
AbstractErgothioneine is a sulfur‐containing histidine derivative that emerges from microbial biosynthesis and enters the human body through intestinal uptake and regulated distribution into specific tissues. Although the proteins involved in biosynthesis and uptake are well characterized, less is known about the degradative pathways of ergothioneine ...
Alice Maurer, Florian Leisinger, David Lim, Florian P. Seebeck   +3 more
openaire   +4 more sources