TRPV1 (vanilloid receptor) in the urinary tract: expression, function and clinical applications

Area of Science:

• Urology
• Neuroscience
• Molecular Biology

Background:

• The transient receptor potential vanilloid subfamily 1 (TRPV1) is an ion channel found in the urinary tract, including sensory fibers and urothelial cells.
• Initially recognized for its role in pain perception, TRPV1's function in the urinary tract is now understood to extend to bladder function regulation.

Purpose of the Study:

• To explore the multifaceted roles of TRPV1 in the urinary tract beyond pain perception.
• To investigate the therapeutic potential of TRPV1 modulation for lower urinary tract dysfunctions.

Main Methods:

• Review of existing literature on TRPV1 expression and function in the mammalian urinary tract.
• Analysis of studies investigating TRPV1's role in bladder contractility and urothelial-sensory fiber communication.
• Examination of therapeutic strategies involving TRPV1 desensitization and antagonism.

Main Results:

• TRPV1 regulates bladder reflex contractions via sensory fiber excitation and urothelial signaling.
• TRPV1 is implicated in cell differentiation, with its presence noted in urothelial and prostatic cancer cells.
• TRPV1 desensitization using capsaicin and resiniferatoxin has shown benefits for conditions like painful bladder syndrome and overactive bladder.

Conclusions:

• TRPV1 plays a significant role in urinary tract function, influencing both sensory signaling and bladder activity.
• TRPV1 modulation offers a promising therapeutic avenue for various lower urinary tract dysfunctions.
• The development of potent TRPV1 antagonists may provide a more effective treatment strategy than current desensitization methods.