Are polymorphisms of the β(3)-adrenoceptor gene associated with an altered bladder function?

Area of Science:

• Genetics
• Urology
• Pharmacogenomics

Background:

• The beta-3 adrenoceptor (B3AR) gene plays a role in bladder function.
• A known Trp64Arg polymorphism in B3AR is associated with overactive bladder.
• Further investigation into B3AR gene variations is warranted to understand their impact on lower urinary tract function.

Purpose of the Study:

• To identify novel polymorphisms in the B3AR gene.
• To determine the association between B3AR gene polymorphisms and parameters of lower urinary tract function.
• To explore the relationship between B3AR genotype and overactive bladder symptoms.

Main Methods:

• Sequencing of the B3AR gene's coding and adjacent regions in 91 patients.
• Genotyping of 1015 patients for specific B3AR single nucleotide polymorphisms.
• Analysis of symptom scores and pressure-flow study parameters in relation to B3AR genotype.

Main Results:

• No frequent novel polymorphisms were identified in the B3AR coding region.
• Five polymorphisms in the non-coding region were found to be in complete linkage with the 64Arg allele.
• Prostate size showed a weak but significant association with the 64Arg allele, but no association with prostate-specific antigen levels.

Conclusions:

• The study's findings do not support a link between B3AR gene polymorphisms and altered bladder function.
• Further research may be needed to fully elucidate the role of B3AR in lower urinary tract disorders.
• The Trp64Arg polymorphism's association with overactive bladder requires further investigation in larger cohorts.