Related Experiment Video
Updated: Aug 2, 2026
13:10
Evaluation of Respiratory System Mechanics in Mice using the Forced Oscillation Technique
Published on: May 15, 2013
[Respiratory function in asthmatics deficient and non-deficient in alpha 1-antitrypsin]
Allergologia Et Immunopathologia
|March 1, 1987
Summary
This study investigated alpha-1-antitrypsin (alpha-1-AT) deficiency in Havana asthma patients. No significant differences in respiratory function were found between normal and deficient alpha-1-AT phenotypes.
Area of Science:
- Pulmonology
- Genetics
- Allergology
Background:
- Alpha-1-antitrypsin (alpha-1-AT) deficiency is linked to lung diseases.
- Allergic bronchial syndrome and bronchial asthma are prevalent in Cuba.
- Understanding etiological factors for asthma is crucial.
Purpose of the Study:
- To investigate the prevalence of alpha-1-antitrypsin (alpha-1-AT) alleles S and Z in asthmatic patients.
- To analyze the potential relationship between alpha-1-AT deficiency and bronchial asthma in Havana.
- To assess the impact of alpha-1-AT phenotype on respiratory function in asthmatics.
Main Methods:
- Phenotyping for alpha-1-antitrypsin (alpha-1-AT) was performed.
- Maximum expiratory flow was measured using a manual flow meter.
- Data from 174 ambulatory asthmatics (15-82 years) were analyzed, considering age of asthma onset.
Main Results:
- No significant differences in respiratory function were observed between normal and alpha-1-AT deficient phenotypes.
- Comparisons were made regarding maximum flow values and age of asthma onset.
- Potential interactions of alpha-1-AT phenotype and age of onset on respiratory function were explored.
Conclusions:
- The study did not find a significant direct link between alpha-1-AT deficiency and altered respiratory function in the studied asthmatic population.
- Other etiological factors may obscure the role of alpha-1-AT deficiency in bronchial asthma.
- Further research is needed to explore subtle differences in respiratory function.
Related Concept Videos
01:05Breathing
The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...
01:21Acute Respiratory Failure-II
Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
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
01:26Asthma-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:
01:28Asthma 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...
01:23Chronic Obstructive Pulmonary Disease II: Emphysema
Emphysema, a major phenotype of chronic obstructive pulmonary disease (COPD), is characterized by irreversible destruction of alveolar walls and permanent enlargement of distal airspaces. Unlike chronic bronchitis, which primarily affects the airways, emphysema predominantly involves the lung parenchyma, where structural damage leads to airflow limitation.PathophysiologyIt most commonly results from prolonged exposure to cigarette smoke and other toxic gases, particularly cigarette smoke.