scholarly journals Bacterial sialoglycosidases in Virulence and Pathogenesis

Pathogens ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 39
Author(s):  
Preethi Sudhakara ◽  
Iyappan Sellamuthu ◽  
A. Aruni
Keyword(s):  
Sialic Acid ◽  
Inflammatory Disease ◽  
Drug Targets ◽  
Bacterial Pathogen ◽  
The United States ◽  
Chronic Inflammatory Disease ◽  
Oral Microbiome ◽  
Toll Like Receptor ◽  
Host Defenses ◽  
Sialic Acid Receptor

Human oral microbiome and dysbiotic infections have been recently evidently identified. One of the major reasons for such dysbiosis is impairment of the immune system. Periodontitis is a chronic inflammatory disease affecting the tissues that surround and support the teeth. In the United States., approximately 65 million people are affected by this condition. Its occurrence is also associated with many important systemic diseases such as cardiovascular disease, rheumatoid arthritis, and Alzheimer’s disease. Among the most important etiologies of periodontitis is Porphyromonas gingivalis, a keystone bacterial pathogen. Keystone pathogens can orchestrate inflammatory disease by remodeling a normally benign microbiota causing imbalance between normal and pathogenic microbiota (dysbiosis). The important characteristics of P. gingivalis causing dysbiosis are its virulence factors which cause effective subversion of host defenses to its advantage allowing other pathogens to grow. Some of the mechanisms involved in these processes are still not well-understood. However, various microbial strategies target host sialoglycoproteins for immune dysregulation. In addition, the enzymes that break down sialoglycoproteins and sialoglycans are the “sialoglycoproteases”, resulting in exposed terminal sialic acid. This process could lead to pathogen-toll like receptor (TLR) interactions mediated through sialic acid receptor ligand mechanisms. Assessing the function of P. gingivalis sialoglycoproteases, could pave the way to designing carbohydrate analogues and sialic acid mimetics to serve as drug targets.

scholarly journals Bacterial Sialoglycosidases in Virulence and Pathogenesis

2019 ◽  
Author(s):  
Preethi Sudhakara ◽  
Iyappan Sellamuthu ◽  
A. Wilson Aruni
Keyword(s):  
Sialic Acid ◽  
Inflammatory Disease ◽  
Drug Targets ◽  
Bacterial Pathogen ◽  
Immune Dysregulation ◽  
Chronic Inflammatory Disease ◽  
Toll Like Receptor ◽  
Host Defenses ◽  
Exposed Terminal ◽  
Sialic Acid Receptor

Periodontitis is a chronic inflammatory disease affecting the tissues that surround and support the teeth. In the U. S., approximately 65 million people are affected by this condition. Its occurrence is also associated with many important systemic diseases such as cardiovascular disease, rheumatoid arthritis, and Alzheimer’s disease. Among the most important etiologies of periodontitis is Porphyromonas gingivalis, a keystone bacterial pathogen. Keystone pathogens can orchestrate inflammatory disease by remodeling a normally benign microbiota causing imbalance between normal and pathogenic microbiota (dysbiosis). The important characteristics of P. gingivalis causing dysbiosis are its virulence factors that cause effective subversion of host defenses to its advantage [1], allowing other pathogens to grow. However, the mechanisms involving these processes are poorly understood. However, various microbial strategies target host sialoglycoproteins for immune dysregulation. In addition, the enzymes that break down sialoglycoproteins/sialoglycans are the “sialoglycoproteases”, resulting in exposed terminal sialic acid. This process could lead to pathogen-toll like receptor (TLR) interactions mediated through sialic acid receptor–ligand mechanisms. By assessing the function of P. gingivalis sialoglycoproteases, could pave the way to designing carbohydrate analogues and sialic acid mimetics to serve as drug targets.

scholarly journals Resveratrol and Its Analogs as Functional Foods in Periodontal Disease Management

2021 ◽  
Vol 2 ◽  
Author(s):  
Yi Rong Ivan Lim ◽  
Philip M. Preshaw ◽  
Haishu Lin ◽  
Kai Soo Tan
Keyword(s):  
Disease Management ◽  
Inflammatory Response ◽  
Periodontal Disease ◽  
Inflammatory Disease ◽  
Functional Foods ◽  
Chronic Inflammatory Disease ◽  
Oral Microbiome ◽  
Periodontal Treatment ◽  
Potential Utility ◽  
Therapeutic Properties

Periodontitis is a common chronic inflammatory disease driven by the interaction between a dysbiotic oral microbiome and the dysregulated host immune-inflammatory response. Naturally derived nutraceuticals, such as resveratrol and its analogs, are potential adjunctive therapies in periodontal treatment due to their antimicrobial and anti-inflammatory properties. Furthermore, different analogs of resveratrol and the choice of solvents used may lead to varying effects on therapeutic properties. This review presents the current findings and gaps in our understanding on the potential utility of resveratrol and its analogs in periodontal treatment.

The role of probiotics in correction of microbiocenosis and cytokine balance of the oral cavity of patient with chronic inflammatory disease of periodont

2020 ◽  
Vol 25 (4) ◽  
pp. 323-330
Author(s):  
E. S. Ovcharenko ◽  
V. V. Erichev ◽  
S. I. Risovannij ◽  
T. V. Aksenova ◽  
S. V. Melekhov ◽  
...  
Keyword(s):  
Oral Cavity ◽  
Periodontal Diseases ◽  
Treatment Protocol ◽  
Chronic Inflammatory Disease ◽  
Oral Microbiome ◽  
Comprehensive Treatment ◽  
Local Immunity ◽  
Treatment Techniques ◽  
Before And After

Relevance. A long-term inflammation in the oral cavity, unreasonable treatment of periodontal patients with antibiotics cause imbalance between certain types of fungal-bacterial associations accompanied by oral dysbiosis and change of local immune status. So, development and application of new comprehensive diagnosis and treatment techniques in periodontal patients, use of products for correction of microbiota and local immunity are a current and a long-term task. Purpose is to optimize the comprehensive treatment protocol of inflammatory periodontal diseases by introducing probiotics and evaluation of oral microbiome and cytokine profile.Materials and methods. 140 patients were examined. Of these 60 patients had chronic generalized plaque-induced gingivitis and 60 patients suffered from moderate chronic generalized periodontitis. Bacterial and fungal microbiome was assessed and the host immune response was evaluated in all patients before and after the treatment. Half of the patients were treated conventionally and the other half were treated according to a modified scheme: probiotic “Bifidumbacterin Forte” was added.Results. A large number of yeast-like fungi Candida and commensal bacteria were detected in periodontal pockets of patients with chronic generalized plaque-induced gingivitis and moderate chronic generalized periodontitis. That correlates with a significant increase of pro-inflammatory cytokines (TNF-α, IL—8), decrease of concentration of INF-γ and increase of antiinflammatory cytokine IL-4.Conclusion. Changes in clinical, microbiological and immunological values during a modified combination therapy with a probiotic and during a conventional treatment demonstrated that effectiveness of treatment of chronic gingivitis and chronic periodontitis increased by 40% and 37% respectively.

A Critical Review on Tamaka Shwasa (Bronchial Asthma) - An Ayurvedic View

2017 ◽  
Vol 2 (3) ◽  
Author(s):  
Sandip R. Baheti ◽  
Deepa Sharma ◽  
Saroj Devi ◽  
Amit Rai
Keyword(s):  
Bronchial Asthma ◽  
Inflammatory Disease ◽  
Critical Review ◽  
Modern Science ◽  
Modern Medicine ◽  
Chronic Inflammatory Disease ◽  
The Body ◽  
Natural Immunity ◽  
Shortness Of Breath ◽  
Asthma Symptoms

Difficulty in breathing or shortness of breath may be simply termed as Shwasa (Asthma), As per Ayurveda, Shwasa is mainly caused by the Vata and Kapha Doshas. Shwasa is broadly classified into five types in Maha Shwasa (Dyspnoea major), Urdhawa Shwasa (Expiratory Dyspnoea), Chinna Shwasa (Chyne-stroke respiration), Kshudra Shwasa (Dyspnoea minor), Tamaka Shwasa (Bronchial Asthma). In modern science Tamaka Shwasa can be correlated with Asthma, Asthma which is a chronic inflammatory disease of airway. In modern medicine there is no cure for Asthma, symptoms can typically be improved. In Ayurveda, Asthma can be effectively and safely manage the condition without inducing any drug dependency where Pachakarma procedures and use of internal medication detoxifies the body, provides nutrition and increases the elasticity of lung tissue it also develops natural immunity of the body thus decreasing episodic recurrence of the disease.

Intermammary Hidradenitis Suppurativa: Considerations on a Unique Presentation

2021 ◽  
pp. 1-4
Author(s):  
Ana Luísa João ◽  
Nélia Cunha ◽  
Joana Cabete
Keyword(s):  
Surgical Approach ◽  
Inflammatory Disease ◽  
Pilonidal Sinus ◽  
Hidradenitis Suppurativa ◽  
Chronic Inflammatory Disease ◽  
Pilonidal Sinus Disease ◽  
Sinus Disease ◽  
Case Presentation ◽  
Overweight Women

Introduction: Hidradenitis suppurativa (HS) is a potentially disabling chronic inflammatory disease. The intermammary location, not clearly specified in the usual phenotypic classifications, entails significant functional and cosmetic compromise. Case Presentation: Eleven cases of predominantly intermammary disease with multiple fistulization and disfiguring scarring were observed at our Department between January 2016 and March 2020. They were young (mean age = 22 years) obese or overweight women, in which the medical-surgical approach has led to variable results. Discussion/Conclusion: Intermammary HS possibly represents a unique phenotypic presentation, likely to be fistulizing and severe. We believe that anatomo-functional considerations, which can be paralleled to pilonidal sinus disease, contribute to its pathophysiology and striking appearance, and further emphasize the importance of multidisciplinary endeavor to reduce the morbidity associated with this seemingly overlooked location.

scholarly journals Regulation of Eosinophilia in Asthma—New Therapeutic Approaches for Asthma Treatment

Cells ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 817
Author(s):  
Ruth P. Cusack ◽  
Christiane E. Whetstone ◽  
Yanqing Xie ◽  
Maral Ranjbar ◽  
Gail M. Gauvreau
Keyword(s):  
Drug Targets ◽  
Airflow Obstruction ◽  
Chronic Inflammatory Disease ◽  
Therapeutic Approaches ◽  
Eosinophilic Asthma ◽  
Airway Eosinophilia ◽  
Gm Csf ◽  
New Therapeutic Approaches ◽  
Cellular Apoptosis ◽  
Reversible Airflow Obstruction

Asthma is a complex and chronic inflammatory disease of the airways, characterized by variable and recurring symptoms, reversible airflow obstruction, bronchospasm, and airway eosinophilia. As the pathophysiology of asthma is becoming clearer, the identification of new valuable drug targets is emerging. IL-5 is one of these such targets because it is the major cytokine supporting eosinophilia and is responsible for terminal differentiation of human eosinophils, regulating eosinophil proliferation, differentiation, maturation, migration, and prevention of cellular apoptosis. Blockade of the IL-5 pathway has been shown to be efficacious for the treatment of eosinophilic asthma. However, several other inflammatory pathways have been shown to support eosinophilia, including IL-13, the alarmin cytokines TSLP and IL-33, and the IL-3/5/GM-CSF axis. These and other alternate pathways leading to airway eosinophilia will be described, and the efficacy of therapeutics that have been developed to block these pathways will be evaluated.

scholarly journals Potent sialic acid inhibitors that target influenza A virus hemagglutinin

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yu-Jen Chang ◽  
Cheng-Yun Yeh ◽  
Ju-Chien Cheng ◽  
Yu-Qi Huang ◽  
Kai-Cheng Hsu ◽  
...  
Keyword(s):  
Sialic Acid ◽  
Antiviral Activity ◽  
Binding Site ◽  
Influenza A Virus ◽  
Receptor Binding ◽  
Influenza A ◽  
The United States ◽  
Ligand Complex ◽  
Receptor Binding Site ◽  
Computational Strategy

AbstractEradicating influenza A virus (IAV) is difficult, due to its genetic drift and reassortment ability. As the infectious cycle is initiated by the influenza glycoprotein, hemagglutinin (HA), which mediates the binding of virions to terminal sialic acids moieties, HA is a tempting target of anti-influenza inhibitors. However, the complexity of the HA structure has prevented delineation of the structural characterization of the HA protein–ligand complex. Our computational strategy efficiently analyzed > 200,000 records of compounds held in the United States National Cancer Institute (NCI) database and identified potential HA inhibitors, by modeling the sialic acid (SA) receptor binding site (RBS) for the HA structure. Our modeling revealed that compound NSC85561 showed significant antiviral activity against the IAV H1N1 strain with EC50 values ranging from 2.31 to 2.53 µM and negligible cytotoxicity (CC50 > 700 µM). Using the NSC85561 compound as the template to generate 12 derivatives, robust bioassay results revealed the strongest antiviral efficacies with NSC47715 and NSC7223. Virtual screening clearly identified three SA receptor binding site inhibitors that were successfully validated in experimental data. Thus, our computational strategy has identified SA receptor binding site inhibitors against HA that show IAV-associated antiviral activity.

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