Increased Tenascin-C and Myofibroblasts in COPD Patients
Author Information
Author(s): Löfdahl Magnus, Kaarteenaho Riitta, Lappi-Blanco Elisa, Tornling Göran, Sköld Magnus C
Primary Institution: Karolinska Institutet, Karolinska University Hospital
Hypothesis
The expression of Tenascin-C is increased in COPD similarly to many other ECM proteins.
Conclusion
COPD patients show increased expression of Tenascin-C and alpha-smooth muscle actin positive cells in the large airways, indicating airway remodeling.
Supporting Evidence
- COPD patients had more Tn-C expression than control groups (p<0.001).
- A significantly increased number of spindle shaped cells expressing α-SMA was observed in COPD patients compared with controls (p<0.05).
- The expression of Tn-C correlated positively to the number of α-SMA positive cells (p<0.001).
Takeaway
This study found that people with COPD have more special proteins in their lungs that can cause breathing problems, even if they don't smoke.
Methodology
Bronchoscopy was performed on COPD patients and control groups, followed by immunohistochemical analysis of bronchial mucosal biopsies.
Limitations
The study did not correlate Tn-C or α-SMA expression with lung function parameters.
Participant Demographics
20 COPD patients (mean age 56 years), 13 smokers without COPD, and 14 non-smokers.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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