Effective combination of hydrostatic pressure and aligned nanofibrous scaffolds on human bladder smooth muscle cells: implication for bladder tissue engineering.
Bladder tissue engineering has been the focus of many studies due to its highly therapeutic potential. In this regard many aspects such as biochemical and biomechanical factors need to be studied extensively. Mechanical stimulations such as hydrostatic pressure and topology of the matrices are critical features which affect the normal functions of cells involved in bladder regeneration. In this study, hydrostatic pressure (10 cm H(2)O) and stretch forces were exerted on human bladder smooth muscle cells (hBSMCs) seeded on aligned nanofibrous polycaprolactone/PLLA scaffolds, and the alterations in gene and protein expressions were studied. The gene transcription patterns for collagen type I, III, IV, elastin, α-SMA, calponin and caldesmon were monitored on days 3 and 5 quantitatively. Changes in the expressions of α-SMA, desmin, collagen type I and III were quantified by Enzyme-linked immuno-sorbent assay. The scaffolds were characterized using scanning electron microscope, contact angle measurement and tensile testing. The positive effect of mechanical forces on the functional improvement of the engineered tissue was supported by translational down-regulation of α-SMA and VWF, up-regulation of desmin and improvement of collagen type III:I ratio. Altogether, our study reveals that proper hydrostatic pressure in combination with appropriate surface stimulation on hBSMCs causes a tissue-specific phenotype that needs to be considered in bladder tissue engineering.
Laboratory of Membrane Biophysics and Macromolecules, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.
Hana Hanaee
HH
Ahvaz
Masoud
M
Soleimani
Hamid
H
Mobasheri
Behnaz
B
Bakhshandeh
Naser
N
Shakhssalim
Sara
S
Soudi
Maryam
M
Hafizi
Mohammad
M
Vasei
Masumeh
M
Dodel
D002448:Cell Adhesion / Q000187:drug effects; D018929:Cell Culture Techniques / Q000295:instrumentation / Q000379:methods; D002465:Cell Movement / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D004526:Efficiency; D006801:Humans; D006874:Hydrostatic Pressure; D019344:Lactic Acid / Q000737:chemistry / Q000494:pharmacology; D008422:Materials Testing; D032389:Myocytes, Smooth Muscle / Q000166:cytology* / Q000187:drug effects / Q000502:physiology; D057139:Nanofibers / Q000737:chemistry*; D011091:Polyesters / Q000737:chemistry / Q000494:pharmacology; D011108:Polymers / Q000737:chemistry / Q000494:pharmacology; D023822:Tissue Engineering / Q000295:instrumentation / Q000379:methods*; D054457:Tissue Scaffolds / Q000737:chemistry*; D001743:Urinary Bladder / Q000166:cytology* / Q000502:physiology
D011091:Polyesters; D011108:Polymers; C016240:polycaprolactone; D019344:Lactic Acid; C033616:poly(lactide)