Obesity, asthma, and oxidative stress
Fernando Holguin1, Anne Fitzpatrick
1University of Pittsburgh Medical Center, 3452 Fifth Ave., Pittsburgh, PA 15213, USA. holguinf@upmc.edu
Journal of Applied Physiology (Bethesda, Md. : 1985)
|November 21, 2009
Summary
Obesity increases oxidative stress, potentially worsening asthma. This effect may only be apparent during asthma flare-ups, not during stable conditions, impacting lung function and treatment effectiveness.
Area of Science:
- Pulmonary Medicine
- Metabolic Disorders
- Immunology
Background:
- Obesity is linked to heightened systemic and airway oxidative stress, impacting vascular disease and fatty liver disease.
- The specific effects of obesity-induced oxidative stress on lung function, particularly in asthma, remain unclear.
- Existing research often examines stable asthma patients, potentially masking the interaction between obesity and asthma under basal conditions.
Purpose of the Study:
- To investigate the role of obesity-mediated oxidative stress in the context of asthma.
- To explore how obesity might influence airway inflammation and the efficacy of asthma treatments.
- To determine if oxidative stress interactions between obesity and asthma are more evident during exacerbations.
Main Methods:
- Review of existing literature on obesity, oxidative stress, and asthma.
- Analysis of oxidative stress biomarkers in obese individuals with and without asthma.
- Hypothesizing the impact of oxidative stress during asthma exacerbations in obese patients.
Main Results:
- Obesity is associated with increased oxidative stress, but this does not always synergistically worsen asthma in stable patients.
- The interaction of oxidative stress between obesity and asthma may not be detectable under basal conditions.
- Obesity-mediated oxidative stress could exacerbate airway inflammation and reduce inhaled corticosteroid effectiveness in asthmatic individuals.
Conclusions:
- Obesity-mediated oxidative stress may significantly impact lung function in asthmatic individuals, particularly during exacerbations.
- Further research is needed to understand the mechanistic role of oxidative stress in the obesity-asthma association.
- Findings could inform public health policies and therapeutic strategies for obese asthmatic patients.
Related Concept Videos
01:20Chronic Obstructive Pulmonary Disease-II: Pathophysiology
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:
Chronic Inflammation
Chronic Inflammation
01:29Asthma-I: Introduction
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...
01:28Asthma I: Introduction
Asthma is a chronic inflammatory disorder of the airways characterized by variable airflow obstruction and heightened bronchial responsiveness to a wide range of triggers. The underlying inflammation leads to airway swelling, mucus hypersecretion, and smooth muscle constriction, all of which narrow the airway lumen and impede airflow. Clinically, asthma presents with recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing, symptoms that typically vary in intensity and...
01:24Obesity
The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...
01:26Asthma-II: Pathophysiology and Classification
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:
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:
01:20Asthma: Pathogenesis and Management
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.
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.