[Bladder interstitial cells and pathophysiology]

Area of Science:

• Urology
• Cell Biology
• Physiology

Background:

• Bladder interstitial cells (IC) are specialized cells integral to bladder function.
• IC possess unique ultrastructural features, including an incomplete basement membrane and distinct organelle content.
• Four IC subtypes exist: lamina propria, intramuscular, inter-detrusor, and perivascular.

Purpose of the Study:

• To elucidate the role of bladder interstitial cells (IC) in bladder function and dysfunction.
• To explore the specific ion currents and Ca2+ signaling pathways in different IC subtypes.
• To identify potential therapeutic targets for bladder disorders linked to IC dysfunction.

Main Methods:

• Characterization of bladder interstitial cell (IC) ultrastructure.
• Analysis of ion currents and activation pathways in lamina propria and intramuscular IC.
• Investigation of Ca2+ signaling in IC-detrusor communication.

Main Results:

• Bladder interstitial cells (IC) exhibit diverse subtypes with distinct electrophysiological properties.
• Calcium (Ca2+) signaling pathways are vital for communication between IC and detrusor smooth muscle.
• Bladder dysfunctions are associated with disruptions in IC ion currents and Ca2+ signaling.

Conclusions:

• Bladder interstitial cells (IC) and their associated signaling pathways are critical for maintaining normal bladder function.
• Dysregulation of IC ion and Ca2+ signaling underlies various bladder pathologies, including bladder outlet obstruction, bladder pain syndrome, interstitial cystitis, neurogenic bladder, and diabetes.
• Imatinib mesylate and electrical stimulation acupuncture therapy represent potential therapeutic strategies for IC-related bladder dysfunction.