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Related Concept Videos

Asthma-II: Pathophysiology and Classification01:26

Asthma-II: Pathophysiology and Classification

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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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Asthma-IV: Diagnostic and Management01:30

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The diagnosis and management of asthma are comprehensive, encompassing clinical assessments, lung function tests, and pharmacological interventions. Here's an overview:
Clinical Assessment for Asthma:
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Asthma: Pathogenesis and Management01:20

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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.
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Asthma-III: Symptoms and Complications01:24

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Asthma, a common chronic respiratory condition, is classified considering the frequency and severity of symptoms alongside lung function impairment. Understanding this classification is essential for appropriate treatment and management. Here's a detailed look at the classification of asthma and its clinical features and complications:
Classification of Asthma
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Antiasthma Drugs: Leukotriene Modifiers01:19

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Leukotriene modifiers, or cysteinyl leukotriene receptor antagonists, are medications used to manage chronic asthma. These agents target specific inflammatory mediators produced during arachidonic acid metabolism, an essential process in generating inflammation in the body.
Leukotriene modifiers work through two distinct mechanisms:
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Related Experiment Video

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Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
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Socioeconomic status and asthma: A bidirectional Mendelian randomization study.

Liang Peng1,2, Wei-Ping Wen1,2,3

  • 1Department of Otorhinolaryngology Head and Neck Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China.

The World Allergy Organization Journal
|July 24, 2023
PubMed
Summary

Asthma may causally lower household income, but lower socioeconomic status (SES) did not appear to cause asthma. Further research is needed to confirm these bidirectional relationships.

Keywords:
AsthmaCausal inferenceGenome-wide association studiesMendelian randomizationSocioeconomic status

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Area of Science:

  • Genetics
  • Public Health
  • Epidemiology

Background:

  • Asthma is frequently observed in individuals with lower socioeconomic status (SES).
  • The causal direction between asthma and SES remains unclear, necessitating investigation.
  • This study investigates the bidirectional relationship between asthma and SES using genetic data.

Purpose of the Study:

  • To assess the potential causal effect of asthma on socioeconomic status (SES).
  • To determine if lower SES causally influences asthma development.
  • To employ bidirectional Mendelian randomization (MR) for causal inference.

Main Methods:

  • Utilized two-sample Mendelian randomization (MR) with genetic summary data from European ancestry GWAS.
  • Examined three SES indicators: education attainment, household income, and Townsend deprivation index (TDI).
  • Employed inverse variance weighted (IVW) meta-analysis and sensitivity analyses to assess pleiotropy.

Main Results:

  • No significant causal effect of genetically predicted SES on asthma risk was found.
  • Genetically predicted asthma showed a causal association with decreased household income (OR 1.72, 0.026 SD decrease).
  • Asthma was also associated with decreased years of schooling (0.024 SD) and increased TDI (0.016 SD).

Conclusions:

  • Genetically predicted asthma may causally contribute to lower household income.
  • The study did not find evidence supporting a causal role of lower SES in asthma development.
  • Further MR studies are recommended to validate these findings due to observed heterogeneity.