Pretransplant defunctionalized bladder-overrated condition?

Area of Science:

• Urology
• Molecular Biology
• Transplantation Medicine

Background:

• Defunctionalized bladder (DB) is a classification for pretransplant patients with low diuresis.
• The molecular and functional implications of DB classification require further investigation.

Purpose of the Study:

• To evaluate bladder receptor gene expression in patients with and without DB.
• To assess voiding behavior after bladder refunctionalization in these patient groups.

Main Methods:

• Compared gene expression of 10 bladder receptors (e.g., M2, M3, α1D, TRPV1) in mucosa and detrusor via qRT-PCR in 68 pretransplant patients (33 DB, 35 non-DB).
• Assessed voiding behavior using IPSS, ICIQ-OAB questionnaires, and 24-hour frequency/volume charts at 3, 6, and 12 months post-transplant.

Main Results:

• Similar receptor expression between DB and non-DB groups, except for α1D, which was overexpressed in the detrusor of the DB group.
• No significant differences in IPSS, ICIQ-OAB scores, or frequency/volume chart parameters between groups post-transplant.
• Both groups showed improvement in voiding symptoms over time.

Conclusions:

• Bladder receptor gene expression is largely similar in pretransplant patients with or without DB.
• Voiding behavior after refunctionalization is comparable regardless of pretransplant diuresis status.
• These findings suggest the clinical relevance of the DB classification in pretransplant patients may be limited.