Evidence of Renin-Angiotensin System Receptors in Deep Fascia: A Role in Extracellular Matrix Remodeling and Fibrogenesis? (PMID: 36289870)
Research Question
Does the deep fascia contain components of the renin–angiotensin system (RAS), and could these receptors contribute to extracellular matrix remodeling and fibrosis?
This study investigated whether deep fascia is responsive to biochemical signaling pathways traditionally associated with cardiovascular regulation and tissue remodeling.
Methods
Researchers collected thoracolumbar fascia samples from patients undergoing elective spinal surgery.
The study analyzed the presence of several components of the renin–angiotensin system (RAS), including:
Angiotensin II type 1 receptor (AT1R)
Angiotensin II type 2 receptor (AT2R)
MAS receptor (MasR)
Angiotensinogen
Angiotensin-converting enzyme 1 (ACE1)
Angiotensin-converting enzyme 2 (ACE2)
The tissue was evaluated using:
Gene expression analysis
Protein analysis (immunoblotting)
The goal was to determine whether fascial tissue expresses receptors linked to remodeling processes.
Key Findings
The study demonstrated that deep fascia contains components of the renin–angiotensin signaling system.
Main findings included:
AT1R showed the highest expression among the angiotensin receptors detected.
MAS receptor and AT2R were also present, although at lower levels.
Components involved in producing signaling molecules (angiotensinogen, ACE1, ACE2) were minimally detected.
Protein analysis confirmed the presence of AT1R and ACE2 in fascial tissue.
These findings suggest that fascia may respond directly to biochemical signals involved in tissue adaptation.
Why It Matters for Fascia
This study adds to growing evidence that fascia is an active biological tissue capable of responding to hormonal and molecular signals.
The presence of RAS receptors suggests fascia may participate in:
Extracellular matrix remodeling
Tissue adaptation
Fibrotic processes
Mechanical response to loading
Long-term changes in tissue structure
These findings may also help explain how biochemical pathways influence connective tissue behavior beyond muscles and organs.
5 Takeaways
Deep fascia contains receptors associated with the renin–angiotensin system.
AT1R was the most strongly expressed receptor in fascial tissue.
Fascia may participate in biochemical remodeling pathways.
RAS signaling could contribute to extracellular matrix changes and fibrosis.
Fascia appears to respond to both mechanical and molecular influences.