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Related Concept Videos

Asthma: Pathogenesis and Management01:20

Asthma: Pathogenesis and Management

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Asthma is a chronic pulmonary condition involving inflammation of the airways, hyper-reactivity, and reversible obstruction of the airways. This condition can significantly impact a person's quality of life, making breathing difficult and leading to distressing symptoms.
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
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Asthma-II: Pathophysiology and Classification01:26

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Asthma is a prevalent chronic respiratory condition marked by inflammation and hyperresponsiveness of the airways. Its pathophysiology involves complex interactions among inflammatory pathways, immune responses, and neural mechanisms.
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:
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Asthma-I: Introduction01:29

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Asthma is a chronic respiratory ailment that requires careful management due to its varying symptoms and influencing factors. It is characterized by airway inflammation, bronchial hyperresponsiveness, and reversible airflow obstruction, leading to symptoms like wheezing, shortness of breath, chest tightness, and coughing. The symptom frequency and intensity may vary considerably over time. It is also linked to immune system responses to allergens and irritants, highlighting the complex...
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Causality in Epidemiology01:21

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Causality or causation is a fundamental concept in epidemiology, vital for understanding the relationships between various factors and health outcomes. Despite its importance, there's no single, universally accepted definition of causality within the discipline. Drawing from a systematic review, causality in epidemiology encompasses several definitions, including production, necessary and sufficient, sufficient-component, counterfactual, and probabilistic models. Each has its strengths and...
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Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
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Genome-wide Association Studies-GWAS01:11

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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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Robust Ligature-Induced Model of Murine Periodontitis for the Evaluation of Oral Neutrophils
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Causal association between asthma and periodontitis: A two-sample Mendelian randomization analysis.

Ruofeng Jiao1,2, Wei Li3, Jukun Song4

  • 1College of Stomatology, Zunyi Medical University, Zunyi, 563000, Guizhou, China.

Oral Diseases
|March 24, 2023
PubMed
Summary

Asthma may protect against periodontitis, reducing the risk of gum disease. This study used Mendelian randomization to investigate the causal link between asthma and periodontitis, finding a protective effect of asthma.

Keywords:
Mendelian randomizationasthmaperiodontitis

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Area of Science:

  • Genetics
  • Epidemiology
  • Oral Health

Background:

  • The relationship between asthma and periodontitis lacks a clear understanding of causality.
  • Previous studies have not established a unified view on the bidirectional interaction between these conditions.

Purpose of the Study:

  • To elucidate the bidirectional causality between asthma and periodontitis using two-sample Mendelian randomization (MR).
  • To investigate whether asthma is a risk factor for periodontitis or vice versa.

Main Methods:

  • Utilized summary-level data from large genome-wide association studies (GWAS) for asthma and periodontitis.
  • Employed five MR methods (MR-Egger, weighted median, IVW, simple mode, weighted mode) to assess causality.
  • Conducted heterogeneity and horizontal pleiotropy tests to ensure analysis validity and controlled for confounders like smoking.

Main Results:

  • Found evidence supporting asthma as a protective factor for periodontitis (IVW OR = 0.34, p = 0.025).
  • Confirmed the protective effect of asthma on periodontitis using an additional asthma GWAS dataset (MR-Egger OR = 0.118, p = 0.04).
  • No evidence of a causal effect of periodontitis on asthma risk was observed in the reverse analysis (p > 0.05).

Conclusions:

  • Individuals with asthma may experience a reduced risk of developing periodontitis.
  • These findings have potential implications for clinical practice and future research directions concerning asthma and periodontitis.