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Chronic Obstructive Pulmonary Disease-II: Pathophysiology

Chronic 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

Asthma I: Introduction

Asthma 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...

Asthma-II: Pathophysiology and Classification

Asthma-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:

Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features

Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features

Chronic bronchitis is a key phenotype of chronic obstructive pulmonary disease (COPD), characterized by airway-centered inflammation and mucus overproduction. It develops from long-term exposure to harmful particles or gases, most commonly cigarette smoke, which triggers a persistent inflammatory response.Cellular and Structural ChangesInflammation initially affects the large bronchi and later the smaller airways, with infiltration by immune cells, including neutrophils, macrophages, and...

Asthma III: Clinical Manifestations

Asthma III: Clinical Manifestations

Asthma presents with a characteristic pattern of episodic respiratory symptoms that reflect underlying airway inflammation, bronchoconstriction, and mucus hypersecretion. Although severity varies among individuals, certain clinical manifestations are considered hallmarks of the disorder and often guide diagnosis and assessment.Respiratory SymptomsA persistent cough is one of the most common early features of asthma. It is frequently dry and tends to worsen at night or in the early morning,...

Asthma: Pathogenesis and Management

Asthma: 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.
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Updated: Jul 4, 2026

Methodology for Sputum Induction and Laboratory Processing

Methodology for Sputum Induction and Laboratory Processing

Published on: December 17, 2017

[Systemic inflammation in COPD and asthma: similarities and differences].

Yuji Higashimoto¹, Yuko Yamagata, Satoshi Taya

¹Department of Internal Medicine, Wakayama Medical University Kihoku Hospital.

Nihon Kokyuki Gakkai Zasshi = the Journal of the Japanese Respiratory Society

|July 3, 2008

Summary

Systemic inflammation markers were compared between COPD and asthma patients. While both conditions share elevated tumor necrosis factor-alpha (TNF-alpha) and interleukin-6 (IL-6), transforming growth factor-beta1 (TGF-beta1) and alpha-1-antitrypsin (alpha1-AT) indicate distinct disease profiles.

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Last Updated: Jul 4, 2026

Methodology for Sputum Induction and Laboratory Processing

Methodology for Sputum Induction and Laboratory Processing

Published on: December 17, 2017

Area of Science:

Pulmonology
Immunology
Biochemistry

Context:

Chronic Obstructive Pulmonary Disease (COPD) and asthma involve airway and systemic inflammation.
Direct comparisons of systemic inflammation markers between COPD and asthma are limited.
Understanding these differences is crucial for accurate diagnosis and treatment.

Purpose:

To compare circulating systemic inflammatory markers in patients with COPD, asthma, and control subjects.
To identify shared and distinct inflammatory profiles between COPD and asthma.

Summary:

Blood samples from 111 COPD patients, 46 asthma patients, and 75 controls were analyzed for various inflammatory markers.
Elevated serum tumor necrosis factor-alpha (TNF-alpha), interleukin-6 (IL-6), and tissue inhibitors of metalloproteinase-1 (TIMP-1) were observed in both COPD and asthma patients compared to controls.
COPD patients showed higher alpha-1-antitrypsin (alpha1-AT) levels, while asthma patients had higher transforming growth factor-beta1 (TGF-beta1) levels than COPD patients.
Smoking status did not significantly affect the measured markers in COPD and asthma patients.

Impact:

Identifies shared inflammatory pathways in COPD and asthma.
Highlights specific markers (TGF-beta1, alpha1-AT) that may differentiate between COPD and asthma.
Provides a basis for further research into targeted therapies based on distinct inflammatory profiles.