title: Evaluation of castor oil-based polyurethane membranes in rat bone-marrow cell culture.
abstract: OBJECTIVE
  To evaluate three methods to isolate rats MSCs and to analyze the potential of a castor oil polyurethane base membrane as a scaffold for MSCs.
  
  
  METHODS
  Four male Wistar rats, aged 20-30 days were used. Bone marrow aspirates from femur and tibia were harvested using DMEM high glucose and heparin. The cell culture was performed in three different ways: direct culture and two types of density gradients. After 15 days, was made the 1st passage and analyzed cell viability with markers Hoerscht 33342 and propidium iodide. The MSCs were characterized by surface markers with the aid of flow cytometry. After this, three types of castor oil polyurethane membranes associated with the MSCs were kept on the 6-well plate for 5 days and were analyzed by optical microscopy to confirm cell aggregation and growth.
  
  
  RESULTS
  Separation procedures 1 and 2 allowed adequate isolation of MSCs and favored cell growth with the passage being carried out at 70% confluence after 15 days in culture. The cells could not be isolated using procedure 3. When the 3 castor oil polyurethane membrane types were compared it was possible to observe that the growth of MSCs was around 80% in membrane type 3, 20% in type 2, and 10% in type 1.
  
  
  CONCLUSIONS
  Both Ficoll-Hypaque densities allow isolation of rat MSCs, and especially castor oil-based membrane type 3 may be used as a scaffold for MSCs.
authors.affiliation: Advanced Reproduction and Cell Therapy Laboratory, Department of Animal Reproduction and Veterinary Radiology, Faculty of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu-SP, Brazil.
authors.forename: Sofia de Amorim
authors.initials: Sde A
authors.lastname: Cerejo
authors.forename: Sheila Canevese
authors.initials: SC
authors.lastname: Rahal
authors.forename: João Ferreira de
authors.initials: JF
authors.lastname: Lima Neto
authors.forename: Fabiana Azevedo
authors.initials: FA
authors.lastname: Voorwald
authors.forename: Fernanda da Cruz Landim e
authors.initials: Fda C
authors.lastname: Alvarenga
mesh_terms: D000818:Animals; D002368:Castor Oil; D018929:Cell Culture Techniques / Q000379:methods; D002454:Cell Differentiation / Q000187:drug effects; D002469:Cell Separation / Q000379:methods*; D002470:Cell Survival / Q000187:drug effects; D005434:Flow Cytometry; D008297:Male; D008422:Materials Testing; D059630:Mesenchymal Stem Cells / Q000166:cytology*; D008855:Microscopy, Electron, Scanning; D008856:Microscopy, Fluorescence; D011140:Polyurethanes; D051381:Rats; D017208:Rats, Wistar; D013499:Surface Properties; D054457:Tissue Scaffolds
chemical_list: D011140:Polyurethanes; D002368:Castor Oil