Connective tissue growth factor: structure-function relationships of a mosaic, multifunctional protein

Area of Science:

• Molecular Biology
• Cell Biology
• Biochemistry

Background:

• Connective tissue growth factor (CTGF) is a key member of the CCN family of secreted, cysteine-rich growth factors.
• CTGF possesses a modular structure with distinct functional domains enabling interactions with growth factors, receptors, and matrix components.
• It plays vital roles in embryonic development, connective tissue maintenance, and tissue repair, and is implicated in diseases like fibrosis and cancer.

Purpose of the Study:

• To elucidate how the functional domains within CTGF modules orchestrate signals and control key biological processes.
• To highlight the integration of multiple extracellular events into cell signals by CTGF structural and functional domains and their cleavage fragments.

Main Methods:

• Review and analysis of existing studies on CTGF structure, function, and signaling pathways.
• Focus on the role of specific functional domains and cleavage fragments in mediating cellular responses.
• Integration of knowledge regarding exogenous stimuli, transcriptional regulation, and downstream signaling.

Main Results:

• CTGF's modular structure facilitates its interaction with diverse extracellular molecules.
• Specific functional domains within CTGF are critical for its diverse biological activities.
• CTGF and its fragments act as integrators of extracellular signals, translating them into cellular responses.

Conclusions:

• Understanding the functional domains of CTGF is essential for comprehending its role in normal physiology and disease.
• CTGF acts as a central hub, integrating extracellular cues to regulate cell behavior and tissue homeostasis.
• Further research into CTGF domain function and cleavage fragments can reveal novel therapeutic targets for fibrotic disorders and cancer.