Sonic hedgehog regulation of human rhabdosphincter muscle:Potential implications for treatment of stress urinary incontinence

Marah Hehemann, Elizabeth Kalmanek, Shawn Choe, Danuta Dynda, Wen Yang Hu, Marcus L. Quek, Daniel A. Harrington, Samuel I. Stupp, Kevin T. McVary, Carol A. Podlasek

Research output: Contribution to journalArticle

Abstract

Aims: Rhabdosphincter (RS) muscle injury occurs during prostatectomy, and is a leading cause of stress urinary incontinence (SUI). Current SUI treatments engender significant side effects, which negatively impact patient quality of life. Thus an unmet need exists to develop novel RS regeneration methods. We have shown that Sonic hedgehog (SHH) is a critical regulator of penile smooth muscle, and we have developed novel peptide amphiphile nanofiber hydrogel delivery of SHH protein to the penis to regenerate smooth muscle after prostatectomy induced injury. If similar SHH signaling mechanisms regulate RS muscle homeostasis, this innovative technology may be adapted for RS regeneration post-prostatectomy. We examine the SHH pathway in human RS muscle. Methods: Human RS obtained during radical cystoprostatectomy (n = 13), underwent SHH pathway analysis. Primary cultures were established (n = 5), and RS cells were treated with SHH protein, SHH inhibitor, or PBS (control). Immunohistochemical analysis for SHH pathway, skeletal muscle actin, and trichrome stain were performed. RS growth was quantified at 3 and 6 days. Results: SHH, it is receptors patched and smoothened, and transcriptional activators, GLI proteins, were identified in human RS muscle. At 3 and 6 days, RS cells increased 62% and 78% (P = 0.0001) with SHH treatment and decreased 40% (P = 0.0001) and 18% (P = 0.039) with SHH inhibition. Conclusions: The SHH pathway was identified in human RS. RS growth increased with SHH treatment, indicating intervention may be possible to enhance RS regeneration, and impact SUI. Peptide amphiphile delivery of SHH may be applicable for RS regeneration and SUI prevention.

Original languageEnglish
Pages (from-to)2551-2559
Number of pages9
JournalNeurourology and Urodynamics
Volume37
Issue number8
DOIs
Publication statusPublished - Nov 2018

Keywords

  • Sonic hedgehog
  • muscle regeneration
  • rhabdosphincter
  • stress urinary incontinence

ASJC Scopus subject areas

  • Clinical Neurology
  • Urology

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    Hehemann, M., Kalmanek, E., Choe, S., Dynda, D., Hu, W. Y., Quek, M. L., Harrington, D. A., Stupp, S. I., McVary, K. T., & Podlasek, C. A. (2018). Sonic hedgehog regulation of human rhabdosphincter muscle:Potential implications for treatment of stress urinary incontinence. Neurourology and Urodynamics, 37(8), 2551-2559. https://doi.org/10.1002/nau.23813