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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...

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Related Experiment Video

Updated: May 9, 2026

Isolation of Mouse Respiratory Epithelial Cells and Exposure to Experimental Cigarette Smoke at Air Liquid Interface

Isolation of Mouse Respiratory Epithelial Cells and Exposure to Experimental Cigarette Smoke at Air Liquid Interface

Published on: February 21, 2011

Airway Spatial Transcriptomics in Smoking.

Jarrett D Morrow^1,2, Zaid W El-Husseini^1,2, Jeong H Yun^1,2

¹Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, MA.

Medrxiv : the Preprint Server for Health Sciences

|April 16, 2025

Summary

This summary is machine-generated.

Cigarette smoking alters lung cell communication, persisting even after cessation. This study used advanced transcriptomic data to predict and identify specific molecular pathways involved in these persistent changes in smokers' lungs.

Keywords:

COPD IPF Visium scRNA-seq smoking spatial transcriptomics

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Author Spotlight: Development and Characterization of an In Vitro Model to Study Chronic Cigarette Smoke Exposure and Its Impact on Airway Epithelial Cells in COPD Research

Author Spotlight: Development and Characterization of an In Vitro Model to Study Chronic Cigarette Smoke Exposure and Its Impact on Airway Epithelial Cells in COPD Research

Published on: July 12, 2024

Area of Science:

Pulmonary medicine
Molecular biology
Bioinformatics

Background:

Cigarette smoking significantly impacts global health.
Cessation yields health benefits, yet molecular changes in lung intercellular communication may persist.
Understanding these persistent changes is crucial for mitigating smoking's long-term effects.

Purpose of the Study:

To develop a framework for predicting altered cell-cell communication in smoker lungs.
To identify specific molecular pathways and cell types affected by smoking-induced communication changes.
To provide molecular context for future therapeutic interventions.

Main Methods:

Integration of single-cell and spatial transcriptomic data from smoker and non-smoker lung tissues.
Creation of virtual single-cell resolution spatial transcriptomic data.
Analysis of cell-cell communication pathways using the integrated data.

Main Results:

Identified significantly altered molecular pathways in current smokers compared to never-smokers.
Observed altered collagen pathway activity involving specific ligands (COL1A1, COL1A2, COL6A3) in fibroblasts, pericytes, and myofibroblasts.
Detected changes in structural, immune-related, growth factor, and immunophilin pathways.

Conclusions:

Successfully inferred spatially proximal cell-cell communication altered by smoking at virtual single-cell resolution.
Findings implicate known pathways and offer new molecular insights into smoking's pathogenic effects.
Results can inform future functional studies and therapeutic strategies for smoking-related lung conditions.