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Journal Information
Vol. 30. Issue 2.
Pages 195-205 (January 2006)
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Vol. 30. Issue 2.
Pages 195-205 (January 2006)
Reconstrucción tridimensional in vitro de mucosa vesical humana
In vitro three-dimensional reconstruction of human bladder mucosa
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E. de Diego Rodríguez****,1, A. Villanueva Peña****, A. Roca Edreira*, A. Meana Infiesta***, S. Gómez Llames***, B. Martín García*, J.Mª Gómez Ortega**
* Servicio de Urología Hospital Universitario Marques de Valdecilla. Santander. (Cantabria)
** Servicio de Anatomía Patológica. Hospital Comarcal de Laredo (Cantabria)
*** Centro Comunitario de Sangre y Tejidos del Principado De Asturias. Oviedo. (Asturias)
**** Servicio de Urología. Hospital Universitario Marques de Valdecilla. Santander. (Cantabria)
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Resumen
Objetivo

Aplicar las técnicas de cultivo in vitro de queratinocitos así como los principios de la ingeniería tisular al epitelio urinario humano, con el fin de reconstruir tridimensionalmente una mucosa vesical humana in vitro, apta para trasplantar

Material y Métodos

Se obtuvieron muestras de mucosa vesical de pacientes programados para cirugía abierta de próstata, previo consentimiento de los mismos, las cuales fueron cultivadas in vitro, para proceder posteriormente al estudio histomorfológico de los tejidos obtenidos

Resultados

Se obtuvo un tejido tridimensional compuesto por una submucosa bioartificial a base de un gel de fibrina y fibroblastos, sobre la que descansan las células uroepiteliales, pudiendo utilizar una malla de ácido poliglicólico, que facilite la manipulación de la mucosa y el posterior injerto de la misma. El tejido obtenido tenía el aspecto de un epitelio inmaduro con muy escasa reacción a citoqueratinas, sin poderse demostrar inmunohistoquímicamente el desarrollo de una membrana basal

Conclusiones

Las técnicas de cultivo in vitro de queratinocitos son aplicables a otros epitelios, entre ellos el urotelio humano. En un periodo de tiempo relativamente corto se puede obtener un tejido in vitro tridimensional apto para trasplantar, precisando posiblemente de las interacciones con el lecho receptor para poder madurar

Palabras Clave:
Cultivo in vitro
Urotelio
Ingeniería tisular
Abstract
Objetive

The purpose of this study is to apply the in vitro keratinocyte culture techniques and the tissue engineering principles to human urothelium, to reconstruct an in vitro three-dimensional human bladder mucosa, suitable for grafting

Material and Methods

Biopsy specimens of human bladder mucosa were obtained from patients undergoing suprapubic prostatectomy, in vitro cultured and finally, an immunohistochemical study was made

Results

A three-dimensional in vitro tissue was obtained, composed of a bio-artificial submucosa (fibrin gel and fibroblast) where the uroepithelial cells were seeding. We used a biodegradable polyglycolic acid mesh to facilitate the tissue manipulation and implantation. An immature epithelium was obtained with a weak immunostaining to cytokeratins. The immunohistochemical study could not demonstrate the development of basement membrane

Conclusions

In vitro keratinocyte culture techniques could be applied to other epithelial tissues like the urothelium. We obtained a three-dimensional in vitro tissue suitable for grafting in a relatively short time, which needs the matrix interactions in order to mature

Keywords:
In vitro culture
Urothelium
Tissue engineering

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