2012 Funded Research Projects:
Characterization of Exstrophy Bladder Smooth Muscle Cells In Culture
The Johns Hopkins Hospital
Baltimore, MD
Eventual continence in bladder exstrophy is determined in part by bladder capacity. At this time, it remains unexplained why some bladders grow better than others. Exstrophy bladder smooth muscle differs from normal bladder smooth muscle at a tissue level and at a molecular level in gene expression. Preliminary studies from Johns Hopkins have suggested that exstrophy bladder smooth muscles cells may have increased levels of transforming growth factor-beta (TGF-beta), which regulates composition of the extracellular matrix, and impacts function and proliferation in multiple cell types. Similarly, preliminary data have shown that alpha-actin, a muscle-specific protein responsible for muscle contraction, may also be expressed at different levels in bladder exstrophy compared to controls. This project will examine the RNA expression of TGF-b through RT-PCR. Additionally, TGF-beta protein concentration and down-stream signaling proteins will be measured quantitatively through Western Blot and Elisa analysis. Other muscle-specific structural and dynamic proteins will be evaluated by Western Blot analysis. This study hopes to further identify why bladder exstrophy cells behave differently compared to controls. Doing so may elevate understanding of the pathogenesis of bladder exstrophy, provide further insight into the prognosis and treatment of the disease, and perhaps will ultimately lead to improvements in tissue engineering.