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Related Concept Videos

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-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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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:
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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.
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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.
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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Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs01:25

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Asthma is a chronic respiratory condition for which new therapeutic avenues, including anti-inflammatory drugs like mast cell stabilizers and anti-IgE treatments, continue to be developed.
Mast cell stabilizers, such as cromolyn (also known as sodium cromoglycate) and nedocromil (Tilade), are effective drugs in asthma management. These stabilizers hinder histamine release by skillfully obstructing the activation of mast cells and other cellular entities. Notably, they navigate this task without...
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Association Between Hemoglobin A1c and Pediatric Asthma Control.

Hewlett Pham1, Rachelle Koehl1, Han Woo1

  • 1Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA.

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Higher Hemoglobin A1c (HbA1c) levels correlate with poorer asthma control in children. This suggests metabolic dysfunction may impact asthma severity, particularly in non-obese children.

Keywords:
asthmaglycemic controlhemoglobin a1cmetabolic dysfunction

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Area of Science:

  • Pediatric Pulmonology
  • Metabolic Health
  • Clinical Research

Background:

  • Asthma is a chronic respiratory disease affecting millions of children worldwide.
  • Metabolic factors, such as Hemoglobin A1c (HbA1c), are increasingly recognized for their potential role in asthma pathogenesis and exacerbation.
  • Understanding the interplay between metabolic health and asthma control is crucial for developing targeted interventions.

Purpose of the Study:

  • To investigate the association between Hemoglobin A1c (HbA1c) levels and asthma outcomes in an urban pediatric cohort.
  • To determine if HbA1c, a marker of long-term glucose control, influences asthma control, symptom severity, and exacerbation risk.

Main Methods:

  • The AIRWEIGHS Study enrolled 164 children with asthma, assessing HbA1c and asthma outcomes at baseline and three months.
  • HbA1c levels were analyzed both continuously and categorized (normal vs. pre-diabetes).
  • Generalized Estimating Equation (GEE) models analyzed the relationship between HbA1c and asthma outcomes, including questionnaires, spirometry, and FeNO.

Main Results:

  • A significant association was found between increased HbA1c levels and worse asthma control, as measured by the Asthma Therapy Assessment Questionnaire (β = -0.74, p < 0.05).
  • HbA1c levels ≥5.7% (consistent with pre-diabetes) were observed in 18% of participants.
  • An interaction between BMI percentile and HbA1c indicated that HbA1c had a stronger association with symptom days and exacerbation risk in children with lower BMI percentiles.

Conclusions:

  • Elevated HbA1c levels are linked to poorer asthma control in children, highlighting the role of metabolic dysfunction in asthma morbidity.
  • The findings suggest that HbA1c may disproportionately affect asthma outcomes in non-obese children with underlying metabolic issues.
  • Further research into metabolic pathways is warranted to elucidate their specific influence on pediatric asthma.