Increasing cell adhesion on plasma deposited fluorocarbon coatings by changing the surface topography.
In designing new biomaterials, it is of outstanding importance to consider how cells respond to specific chemical and topographical features on the material surface. The behavior of most cell types in vivo is strictly related to specific chemical and topographical cues that characterize the extra cellular environment. In particular, during their lives cells react to topographical patterns such as those of the extracellular matrix (ECM), of micro and/or nanometric dimensions. The production of micrometric and/or nanometric features on artificial materials usually involves expensive and time-consuming methods of manufacturing, such as electron beam and colloidal lithography. In this article, different "Teflon-like" structured surfaces were deposited from tetrafluoroethylene (C(2)F(4))-fed plasmas, for the study of cell adhesion and growth. The reaction of different cell lines to different topographical features was evaluated and compared with cell behavior on flat samples with the same chemical composition. Cell adhesion was calculated from area covered by cells at different time of culture. Beside this, cell proliferation was determined with the MTT test. Cell morphology and filopodia interaction with the nanofeatures were also estimated by optical and scanning electron microscopy. A dramatic difference both in adhesion and growth was found between cells seeded on flat and rough surfaces with the density and spreading of adhered cells varying as a function of the roughness of coatings.
Gristina
Roberto
R
Institute of Inorganic Methodologies and Plasmas (IMIP), CNR Bari, 7016 Bari, Italy. gristina@chimica.uniba.it
D'Aloia
Erica
E
Senesi
Giorgio S
GS
Milella
Antonella
A
Nardulli
Marina
M
Sardella
Eloisa
E
Favia
Pietro
P
d'Agostino
Riccardo
R
D016475:3T3 Cells; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D002448:Cell Adhesion; D002462:Cell Membrane / Q000378:metabolism; D003102:Colloids / Q000737:chemistry; D005109:Extracellular Matrix / Q000378:metabolism; D005461:Fluorine / Q000737:chemistry*; D005466:Fluorocarbons / Q000737:chemistry; D006801:Humans; D051379:Mice; D008855:Microscopy, Electron, Scanning / Q000379:methods; D013499:Surface Properties; D013778:Tetrazolium Salts / Q000737:chemistry; D013844:Thiazoles / Q000737:chemistry
D001672:Biocompatible Materials; D003102:Colloids; D005466:Fluorocarbons; D013778:Tetrazolium Salts; D013844:Thiazoles; D005461:Fluorine; D002244:Carbon; C022616:thiazolyl blue; C015531:tetrafluoroethylene