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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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Epidermal stem cells (EpiSCs) are mainly located at the basal layer of the epidermis. These cells repair minor injuries of the skin and replace dead skin cells. However, EpiSCs’ cannot heal severe wounds such as major burns or those from diabetes or hereditary disorders. In such cases, culturing the epidermal stem cells from the patient is possible and has yielded successful treatment options, such as laboratory-grown skin grafts. These grafts are synthesized using a patient’s own...
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The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular...
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Related Experiment Video

Updated: Mar 13, 2026

Ex Vivo Corneal Organ Culture Model for Wound Healing Studies
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Ex Vivo Corneal Organ Culture Model for Wound Healing Studies

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CCN2 in Skin Fibrosis.

Andrew Leask1

  • 1Departments of Dentistry and Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, Dental Sciences Building, London, ON, Canada, N6A 5C1. Andrew.Leask@schulich.uwo.ca.

Methods in Molecular Biology (Clifton, N.J.)
|October 14, 2016
PubMed
Summary

Connective tissue growth factor (CCN2) is a key regulator of fibrosis. Recent data confirm CCN2

Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • Connective tissue growth factor (CCN2) was discovered in 1991.
  • Early studies indicated CCN2 upregulation in response to transforming growth factor-beta (TGF-β) and overexpression in fibrotic conditions.
  • These findings suggested CCN2's role in fibrosis.

Purpose of the Study:

  • To review recent data confirming CCN2's role as a key regulator of fibrosis.
  • To elucidate the mechanism of action for CCN2 in fibrotic processes.

Main Methods:

  • Literature review of studies investigating CCN2 expression and function.
  • Analysis of data demonstrating CCN2's direct involvement in fibrotic conditions.
  • Synthesis of proposed mechanisms for CCN2's action.
Keywords:
AdhesionCCN familyCCN2CTGFConditional knockoutContractionType I collagen

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Main Results:

  • Recent data provide direct evidence supporting CCN2's hypothesis as a key fibrosis regulator.
  • The review consolidates observations linking CCN2 to fibrotic conditions.
  • A potential mechanism of action for CCN2 is proposed.

Conclusions:

  • CCN2 is confirmed as a critical regulator in the development of fibrosis.
  • Understanding CCN2's mechanism is crucial for targeting fibrotic diseases.
  • Further research is warranted to fully explore CCN2's therapeutic potential.