Brain-derived neurotrophic factor in urinary continence and incontinence

Area of Science:

• Neuroscience
• Urology
• Reproductive Medicine

Background:

• Urinary incontinence (UI) significantly impacts elderly quality of life and incurs financial costs.
• Neurotrophins, like brain-derived neurotrophic factor (BDNF), are increasingly linked to lower urinary tract function.
• BDNF's role is implicated in normal physiology and the pathophysiology of stress urinary incontinence (SUI) and bladder pain syndrome/interstitial cystitis (BPS/IC).

Purpose of the Study:

• To explore the neurophysiological roles of BDNF in urinary function.
• To investigate BDNF's involvement in the pathogenesis of SUI and BPS/IC.
• To assess BDNF's potential as a therapeutic target for urinary incontinence.

Main Methods:

• Review of accumulating evidence connecting BDNF to lower urinary tract function.
• Analysis of clinical findings regarding BDNF levels in women with postpartum SUI.
• Examination of animal model experiments demonstrating BDNF's role in nerve injury and recovery after simulated childbirth.

Main Results:

• Reduced BDNF levels are observed in antepartum and postpartum women, correlating with SUI.
• Simulated childbirth injury in animal models decreases BDNF, hindering nerve recovery and continence.
• Exogenous BDNF administration promotes neural recovery and restores continence in animal models.
• Serotonin and noradrenaline reuptake inhibitors, used for depression and SUI, increase BDNF levels.

Conclusions:

• BDNF is crucial for maintaining normal urinary function.
• Dysregulation of BDNF contributes to the development of SUI and BPS/IC.
• Targeting BDNF mechanisms offers potential for future urinary incontinence therapies.