Urinary proteomic pattern in female stress urinary incontinence: a pilot study

Area of Science:

• Urology
• Proteomics
• Biochemistry

Background:

• Previous attempts to find specific urine protein biomarkers for stress urinary incontinence (SUI) have yielded no clinically significant results.
• The current study investigates the hypothesis that the overall urinary proteome differs between women with and without SUI.

Purpose of the Study:

• To compare the urinary proteome of women with SUI to that of age-matched controls.
• To identify potential urinary protein biomarkers associated with SUI.

Main Methods:

• An age-matched case-control study involving 20 women with SUI and 20 controls.
• High-performance liquid chromatography separation and tandem mass spectrometry detection were used for protein identification.
• Data analysis was performed using Mascot 2.4.1 software within ProteinScape 3.1.

Main Results:

• A total of 828 different proteins were identified in the urine samples.
• Six proteins exhibited significant concentration differences between SUI patients and controls (q value < 0.25).
• Four proteins (plasma serine protease inhibitor, leucine-rich alpha-2-glycoprotein, lysosomal alpha-glucosidase, peptidyl-prolyl cis-trans isomerase A) were upregulated in SUI samples, while two (uromodulin, TALPID3) were downregulated.

Conclusions:

• The study suggests that altered expression of specific urinary proteins, including plasma serine protease inhibitor, leucine-rich alpha-2-glycoprotein, lysosomal alpha-glucosidase, peptidyl-prolyl cis-trans isomerase A, uromodulin, and TALPID3, may be linked to female SUI.
• These identified proteins represent potential novel biomarkers for SUI.