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Published on: November 10, 2021
Connective tissue growth factor and renal diseases: some answers, more questions
Nadia Abdel Wahab1, Roger M Mason
1Cell and Molecular Biology Section, Division of Biomedical Sciences, Faculty of Medicine, Imperial College London, London, England, UK. nadia.wahab@imperial.ac.uk
Purpose Of Review:
Connective tissue growth factor (CCN2) has recently received much attention as a possible key determinant of progressive renal fibrosis. However, the mechanism(s) by which this growth factor functions is not known. The purpose of this review is to summarize and discuss the recent findings regarding the possible mechanisms involved.
Recent Findings:
Emerging evidence from in-vitro studies of renal cells indicates that connective tissue growth factor is a crucial mediator for transforming growth factor-beta-induced cellular dysfunction, manifest by increased cellular hypertrophy, synthesis of extracellular matrix proteins and their deposition and assembly around the cells. Indeed, recent evidence suggests that the interrelationship between connective tissue growth factor and transforming growth factor-beta is stronger than first thought. While transforming growth factor-beta induces the expression of connective tissue growth factor, the latter plays a key role in both bioactivation of latent transforming growth factor-beta and the promotion of its Smad signalling activity.
Summary:
Connective tissue growth factor is clearly implicated in the pathogenesis of progressive renal disease. Although there is much to learn about the production, function, and mechanism of action of connective tissue growth factor, some progress has been made in understanding the molecular basis of its relationship with transforming growth factor-beta. Elucidating the signal transduction pathways activated by connective tissue growth factor will also definitely help to clarify other actions of connective tissue growth factor which may be independent of transforming growth factor-beta. Because of the inflammatory and immunosuppressive properties of transforming growth factor-beta, connective tissue growth factor seems to be an attractive alternative therapeutic target for combating renal fibrosis.
Insights
Connective tissue growth factor (CCN2) is a key driver of kidney fibrosis by mediating transforming growth factor-beta effects. Understanding CCN2 mechanisms offers new therapeutic targets for renal disease.
Area of Science:
- Nephrology
- Cell Biology
- Molecular Medicine
Background:
- Connective tissue growth factor (CCN2) is implicated in progressive renal fibrosis.
- Mechanisms underlying CCN2's role in kidney disease remain largely unknown.
Purpose of the Study:
- To review and discuss recent findings on the mechanisms of CCN2 in renal fibrosis.
- To explore the relationship between CCN2 and transforming growth factor-beta (TGF-β).
Main Methods:
- In-vitro studies of renal cells.
- Review of emerging evidence on CCN2 and TGF-β interactions.
Main Results:
- CCN2 mediates TGF-β-induced renal cell dysfunction, including hypertrophy and extracellular matrix deposition.
- A strong interplay exists between CCN2 and TGF-β; TGF-β induces CCN2 expression, while CCN2 bioactivates latent TGF-β and promotes its signaling.
- Recent evidence highlights CCN2's role in TGF-β bioactivation and Smad signaling.
Conclusions:
- CCN2 is implicated in progressive renal disease pathogenesis.
- Further research into CCN2 production, function, and signaling pathways is needed.
- CCN2 represents a potential therapeutic target for combating renal fibrosis due to its link with TGF-β's properties.
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