Potential of stem/progenitor cell cultures within polyester fleeces to regenerate renal tubules

• Published in: Biomaterials Vol. 30; no. 22; pp. 3723 - 3732
• Main Authors: Roessger, Anne, Denk, Lucia, Minuth, Will W.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Ltd 01.08.2009
• Subjects: Advanced Basic Science; Animals; Artificial interstitium; Biocompatible Materials - chemistry; Cell Differentiation - physiology; Cells, Cultured; Dentistry; Kidney; Kidney Tubules - cytology; Kidney Tubules - growth & development; Materials Testing; Organ Culture Techniques - instrumentation; Organ Culture Techniques - methods; Perfusion culture; Polyester fleece; Polyesters - chemistry; Rabbits; Regeneration - physiology; Stem Cells - cytology; Stem Cells - physiology; Tissue engineering; Tissue Engineering - instrumentation; Tissue Engineering - methods; Tubule; Perfusion culture; Tubule; Artificial interstitium; Tissue engineering; Kidney; Polyester fleece
• ISSN: 0142-9612; 1878-5905; 1878-5905
• DOI: 10.1016/j.biomaterials.2009.03.041

The cell biological mechanism controlling the regeneration of renal tubules in renal failure after application of stem/progenitor cells is subject of actual research. Unsolved issues are the integration of stem/progenitor cells in a diseased organ environment, the differentiation into epithelial tissue and the formation of tubules in a spatial environment. Following this therapeutic strategy new biomaterials have to be found promoting spatial development of tubules. To obtain new information about the growth of tubules renal stem/progenitor cells from neonatal rabbit kidney were isolated and mounted in a tissue carrier between a selection of commercially available polyester fleeces. This procedure replaces coating by extracellular matrix proteins and creates an artificial interstitium supporting development of tubules. Perfusion culture was performed with chemically defined IMDM containing aldosterone as tubulogenic factor. Polyester fleeces were investigated by scanning electron microscopy. The spatial development of tubules was registered on whole-mount specimens and on cryosections labeled with SBA and antibodies indicating tubule differentiation. It is found that some polyester fleeces promote the spatial development of tubules between the fibers, whereat each of them produces its individual growth pattern.