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Do current bladder smooth muscle cell isolation procedures result in a homogeneous cell population? Implications for bladder tissue engineering

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Abstract

Purpose

Conventional techniques used to harvest and culture bladder smooth muscle cells (SMCs) have been thought to yield homogeneous populations of SMCs. In order to delineate the cellular composition of tissue derived bladder cells, this study was conducted to determine whether current culturing techniques result in a uniform population of bladder SMCs that may be utilized for bladder tissue engineering.

Methods

Patient derived bladder muscle was isolated and manually minced followed by enzymatic digestion. Cells were cultured in d-valine α-MEM with decreasing levels of fetal bovine serum then fixed and permeabilized for flow cytometric and immunofluorescent analyses. Antibody staining of cultured cells consisted of α-SMA, von Willebrand factor, pan-cytokeratin, CD31, and CD90. Cells were visualized using directly conjugated fluorescein isothiocyanate primary or IgG-Alexa-555 conjugated secondary antibodies.

Results

Flow cytometric analyses revealed mixed populations of cells expressing non-SMC epitopes as corroborated by immunofluorescent studies. High density oligonucleotide array analysis revealed expression levels of known bladder SMC genes and the expression of endothelial and fibroblast related markers (P < 0.005).

Conclusions

Phenotypic analyses demonstrate cell heterogeneity when SMCs are acquired and cultured through conventional methods. Standardized criteria based upon objective experimentation need to be established in order to better characterize bladder SMCs that are to be utilized for bladder tissue engineering.

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Conflict of interest statement

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Department of Urology, The Feinberg School of Medicine at Northwestern University, 303 East Superior Street, IBNAM 11-113, Chicago, IL, 60611, USA

    Arun K. Sharma, Daniel A. Harrington & Earl Y. Cheng

  2. Division of Pediatric Urology, Children’s Memorial Hospital, Chicago, IL, USA

    Arun K. Sharma, Jena L. Donovan, Jennifer A. Hagerty, Ryan R. Sullivan, Daniel A. Harrington & Earl Y. Cheng

  3. The Institute of Bionanotechnology in Medicine (IBNAM), Northwestern University, Chicago, IL, USA

    Arun K. Sharma, Daniel A. Harrington & Earl Y. Cheng

  4. Department of Pharmacology, Rush University Medical Center, Chicago, IL, USA

    Seby L. Edassery

Authors
  1. Arun K. Sharma
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  2. Jena L. Donovan
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  3. Jennifer A. Hagerty
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  4. Ryan R. Sullivan
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Correspondence to Arun K. Sharma.

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Sharma, A.K., Donovan, J.L., Hagerty, J.A. et al. Do current bladder smooth muscle cell isolation procedures result in a homogeneous cell population? Implications for bladder tissue engineering. World J Urol 27, 687–694 (2009). https://doi.org/10.1007/s00345-009-0391-3

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  • DOI: https://doi.org/10.1007/s00345-009-0391-3

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