Release of bioactive transforming growth factor beta(3) from microtextured polymer surfaces in vitro and in vivo.
Transforming growth factor beta(3) (TGF-beta(3)) has been under investigation with the objective of improving wound healing. Yet, little experimental knowledge exists about applications of TGF-beta(3) in implantology and tissue engineering. The aims of this study were to determine the release kinetics and bioactivity of TGF-beta(3) released from microtextured silicone and poly-L-lactic acid (PLA) surfaces in vitro and in vivo. We loaded surfaces with 100 ng of TGF-beta(3). An in vitro assay showed that TGF-beta(3) was released in a burstlike manner. Released TGF-beta(3) was capable of inhibiting the proliferation of mink lung epithelial cells, indicating that released TGF-beta(3) had remained at least partly active. Subsequently, an in vivo experiment (1 h-3 days) was performed with implants loaded with TGF-beta(3). In cryosections, TGF-beta(3) activity was assessed by an in situ bioassay. We found that active TGF-beta(3) was released for up to 24 h. Furthermore, released TGF-beta(3) could be detected up to 320 microm from the implant. On the basis of these observations, we conclude that TGF-beta(3) loaded onto microtextured polymer membranes remains functional when released in vitro and in vivo and, therefore, may represent an alternative for introducing a growth factor into a wound to achieve long-term and long-range biological effects.
Parker
J A T C
JA
Department of Biomaterials, College of Dental Science, University Medical Center Nijmegen, 6500 HB Nijmegen, The Netherlands.
Brunner
G
G
Walboomers
X F
XF
Von den Hoff
J W
JW
Maltha
J C
JC
Jansen
J A
JA
D000818:Animals; D001672:Biocompatible Materials; D004848:Epithelium / Q000378:metabolism; D066298:In Vitro Techniques; D007700:Kinetics; D019344:Lactic Acid / Q000378:metabolism*; D008168:Lung / Q000378:metabolism; D008907:Mink; D011091:Polyesters; D011108:Polymers / Q000378:metabolism*; D012828:Silicones / Q000378:metabolism*; D016212:Transforming Growth Factor beta / Q000378:metabolism*; D053782:Transforming Growth Factor beta3
D001672:Biocompatible Materials; D011091:Polyesters; D011108:Polymers; D012828:Silicones; D016212:Transforming Growth Factor beta; D053782:Transforming Growth Factor beta3; D019344:Lactic Acid; C033616:poly(lactide)