Cited by 239Connective Tissue Growth Factor ResearchSkin Protection and AgingTGF-β signaling in diseases

Reduced Expression of Connective Tissue Growth Factor (CTGF/CCN2) Mediates Collagen Loss in Chronologically Aged Human Skin

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Quan, TaiHao, Shao, Yuan, He, Tianyuan, Voorhees, John J., Fisher, Gary J.·2010·Journal of Investigative Dermatology

Abstract

Reduced production of type I procollagen is a prominent feature of chronologically aged human skin. Connective tissue growth factor (CTGF/CCN2), a downstream target of the transforming growth factor-beta (TGF-beta)/Smad pathway, is highly expressed in numerous fibrotic disorders, in which it is believed to stimulate excessive collagen production. CTGF is constitutively expressed in normal human dermis in vivo, suggesting that CTGF is a physiological regulator of collagen expression. We report here that the TGF-beta/Smad/CTGF axis is significantly reduced in dermal fibroblasts, the major collagen-producing cells, in aged (> or = 80 years) human skin in vivo. In primary human skin fibroblasts, neutralization of endogenous TGF-beta or knockdown of CTGF substantially reduced the expression of type I procollagen mRNA, protein, and promoter activity. In contrast, overexpression of CTGF stimulated type I procollagen expression, and increased promoter activity. Inhibition of TGF-beta receptor kinase, knockdown of Smad4, or overexpression of inhibitory Smad7 abolished CTGF stimulation of type I procollagen expression. However, CTGF did not stimulate Smad3 phosphorylation or Smad3-dependent transcriptional activity. These data indicate that in human skin fibroblasts, type I procollagen expression is dependent on endogenous production of both TGF-beta and CTGF, which act through interdependent yet distinct mechanisms. Downregulation of the TGF-beta/Smad/CTGF axis likely mediates reduced type I procollagen expression in aged human skin in vivo.

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Crossref · 10.1038/jid.2009.224

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  • Skin aging is characterized by impaired wound healing, atrophy, reduced tensile strength and wrinkle formation, marked loss in skin structural integrity and in collagen and elastic fibres, with weakening in the fibre network, due to dysfunctional fibroblasts.

    “Particularly for skin aging, an event characterized by impaired wound healing, atrophy, reduced tensile strength and wrinkle formation, a marked loss in skin structural integrity and in collagen and elastic fibres, with weakening in the fibre network, has been reported, due to dysfunctional fibroblasts [34,35].”

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Authors
Quan, T., Shao, Y., He, T., Voorhees, J. J., & Fisher, G. J.
Affiliations
University of Michigan (US)
Corresponding author
Fisher, Gary J.
Venue
Journal of Investigative Dermatology
Publisher
Elsevier BV
Published
2010-02
Volume
130
Issue
2
Pages
415-424
ISSN
0022-202X (ISSN-L)
OpenAlex
W2053402048
Cited by
239
References
57
Citations by year
2026: 13 · 2025: 13 · 2024: 26 · 2023: 21 · 2022: 23 · 2021: 17 · 2020: 13 · 2019: 13 · 2018: 13 · 2017: 16 · 2016: 14 · 2015: 17 · 2014: 14 · 2013: 7 · 2012: 7
FWCI
2.41
Type
journal article
Language
en
Open access
Locations
  • Journal of Investigative Dermatology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health (AG019364, AG025186)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Connective Tissue Growth Factor Research
  • Health Sciences › Medicine › Dermatology › Skin Protection and Aging
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
Keywords
connective tissue growth factor, skin aging, collagen loss, type I procollagen, TGF-β/Smad signaling, dermal fibroblasts, SMAD4, Smad7, Smad3, gene expression regulation, dermis
MeSH terms
Adult, Aged, Aged, 80 and over, Biopsy, Collagen, Fibroblasts, Fibrosis, Gene Expression Regulation, Humans, Middle Aged, Phosphorylation, Skin, Skin Physiological Phenomena, Skin Aging, Dermis, Connective Tissue Growth Factor

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