Related Experiment Video

Updated: May 2, 2026

Oropharyngeal Administration of Bleomycin in the Murine Model of Pulmonary Fibrosis
06:03

Oropharyngeal Administration of Bleomycin in the Murine Model of Pulmonary Fibrosis

Published on: May 9, 2025

2.2K

Paraquat increases connective tissue growth factor expression and impairs lung fibroblast proliferation and

N Zhang1, Y-P Xie2, L Pang1

  • 1Department of Emergency Medicine, The First Hospital of Jilin University, China.

Human & Experimental Toxicology
|February 22, 2014
PubMed

Insights

Paraquat exposure damages human lung cells by reducing proliferation and altering cell properties. This study reveals molecular mechanisms, including increased connective tissue growth factor (CTGF), offering targets for treating paraquat poisoning.

Area of Science:

  • Toxicology
  • Cell Biology
  • Molecular Biology

Background:

  • Paraquat poisoning is a significant clinical challenge with limited effective treatments.
  • Understanding the molecular mechanisms of paraquat-induced lung damage is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the in vitro molecular mechanisms of paraquat-induced lung damage.
  • To examine the effects of paraquat on human fetal lung fibroblasts (MRC-5 cells).
  • To identify potential therapeutic targets for paraquat poisoning.

Main Methods:

  • Utilized cultured human fetal lung fibroblasts (MRC-5 cells) for in vitro analysis.
  • Assessed cell proliferation using flow cytometry.
  • Evaluated viscoelastic properties via micropipette aspiration technique.
  • Quantified connective tissue growth factor (CTGF) expression using real-time PCR and ELISA.

Main Results:

  • Paraquat significantly reduced MRC-5 cell proliferation in a concentration-dependent manner (p < 0.05).
  • Paraquat impaired cell viscoelastic properties independently of time (p < 0.05).
  • Paraquat exposure led to a significant, time-dependent increase in CTGF expression (p < 0.05) and altered cell morphology.

Conclusions:

  • Paraquat induces lung fibroblast damage through mechanisms involving reduced proliferation and altered biomechanical properties.
  • Increased CTGF expression is a key molecular response to paraquat exposure.
  • These findings provide insights into paraquat-induced lung fibrosis and suggest CTGF as a potential therapeutic target.
Keywords:
Lung fibroblastconnective tissue growth factorparaquatproliferationviscoelasticity

More Related Videos

Artificial Lung Device Priming for In Situ Fiber Bundle Surface Grafting08:53

Artificial Lung Device Priming for In Situ Fiber Bundle Surface Grafting

Published on: March 28, 2025

828
Refined Murine Model of Idiopathic Pulmonary Fibrosis07:51

Refined Murine Model of Idiopathic Pulmonary Fibrosis

Published on: June 17, 2025

1.4K

Related Concept Videos

Chronic Obstructive Pulmonary Disease II: Emphysema01:23

Chronic 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.
48
Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

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
5.0K
Gene Regulation in Microbial Communities: Quorum Sensing01:28

Gene Regulation in Microbial Communities: Quorum Sensing

Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
954