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Related Concept Videos

Introduction to Fibroblasts01:09

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Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
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Chronic Obstructive Pulmonary Disease II: Emphysema01:23

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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.
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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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Chronic obstructive pulmonary disease (COPD) is a group of lung conditions that progressively worsen over time, including chronic bronchitis and emphysema. This cluster of diseases collectively leads to a gradual and irreversible decline in lung function over time.
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Fibroblast phenotypes in different lung diseases.

Heng Du, Dali Chen, Yubin Zhou

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    |September 6, 2014
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    Fibroblast phenotypes change with lung cancer progression and inflammation. These changes, involving markers like alpha-SMA and vimentin, suggest a common origin for fibroblasts in both cancer and inflammatory lung diseases.

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    Area of Science:

    • Oncology
    • Cell Biology
    • Pulmonology

    Background:

    • The tumor microenvironment, including cancer-associated fibroblasts (CAFs), is crucial for tumor growth and metastasis.
    • Fibroblasts may also contribute to inflammatory diseases, but their phenotypic changes in lung conditions are not well understood.
    • This study investigated fibroblast phenotype variations across different lung diseases.

    Purpose of the Study:

    • To investigate fibroblast phenotypic variations in various lung diseases.
    • To explore the relationship between fibroblast phenotypes and lung malignancy.
    • To examine potential common mechanisms in fibroblast formation in lung cancer and inflammatory conditions.

    Main Methods:

    • Examined six types of lung tissues, from normal to adenocarcinoma with metastasis, plus para-carcinoma tissues.
    • Used immunohistochemistry to assess expression of alpha-SMA, FAP, vimentin, E-cadherin, and CK-19.
    • Detected transforming growth factor-beta (TGF-beta) and Twist simultaneously.

    Main Results:

    • Progressive increase in alpha-SMA, vimentin, and CK-19 correlated with malignancy; E-cadherin decreased.
    • TGF-beta and Twist were present in cancer and inflammatory tissues, but not para-carcinoma tissues.
    • Fibroblast phenotypes varied significantly based on lung disease type and malignancy.

    Conclusions:

    • Fibroblast phenotypes differ based on lung malignancy and change gradually.
    • Similar fibroblast phenotypes in inflammatory and cancerous lung tissues suggest a link between inflammation and cancer.
    • Common mechanisms may underlie fibroblast development in inflammatory lung diseases and lung cancer.