Design of a controlled release system of OP-1 and TGF-β1 based in microparticles of sodium alginate and release characterization by HPLC-UV.
A new system for sustained release of growth factors, such as osteogenic protein 1 (OP-1) and transforming growth factor β1 (TGF-β1), intended to repair and promote dental tissue regeneration in rats was designed and characterized in this work. The release system was made with microparticles of sodium alginate, produced by ionic gelling dripping technique. The release profiles of OP-1 and TGF-β1 from biopolymer matrix were determined by high-performance liquid chromatography (HPLC), and with this purpose, an HPLC-UV method was developed. About 80% of each growth factor was released in the first 24 h, reaching almost 100% in 168 h. The system was tested during the tissue repair in rat molars in comparison with calcium hydroxide and both growth factors not encapsulated. The dentin sialoprotein (DSP) was used as a repair marker. It was detected by immunohistochemistry, after 14- and 28-d post-treatment. X                         (2) test (p ≤ 0.001) and Fisher exact test (p ≤ 0.05) were applied for assessment of the amount of immunostaining. The treatment with encapsulated OP-1 showed an increased DSP immunostaining after 14 d and did not find any significant difference with the immunostaining observed for calcium hydroxide treatment. Treatment with TGF-β1 did not show significant difference with calcium hydroxide. Treatment with both factors OP-1 and TGF-β1 showed higher DSP immunostaining in comparison with calcium hydroxide treatment. In conclusion, the combination of both growth factors encapsulated showed more DSP immunostaining in comparison with each one separated, either encapsulated or not.
Laboratorio de Biología Celular y Tisular, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Aguascalientes, 20131, Aguascalientes, Mexico.
Ricardo
R
Oliva-Rodríguez
José
J
Pérez-Urizar
Estela
E
Dibildox-Alvarado
María Consolación
MC
Martínez-Saldaña
Francisco Javier
FJ
Avelar-González
Héctor
H
Flores-Reyes
Amaury de Jesús
Ade J
Pozos-Guillén
Alma Lilián
AL
Guerrero-Barrera
D000464:Alginates / Q000737:chemistry*; D000818:Animals; D055419:Bone Morphogenetic Protein 7 / Q000378:metabolism* / Q000494:pharmacology; D055252:Cell-Derived Microparticles / Q000737:chemistry* / Q000648:ultrastructure; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003692:Delayed-Action Preparations; D003782:Dental Pulp / Q000187:drug effects; D016326:Extracellular Matrix Proteins / Q000378:metabolism; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D008863:Microspheres; D010750:Phosphoproteins / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D012795:Sialoglycoproteins / Q000378:metabolism; D053773:Transforming Growth Factor beta1 / Q000378:metabolism* / Q000494:pharmacology; D014466:Ultraviolet Rays; D000099311:Dentin Sialophosphoprotein
D000464:Alginates; D055419:Bone Morphogenetic Protein 7; D003692:Delayed-Action Preparations; D016326:Extracellular Matrix Proteins; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D010750:Phosphoproteins; D012795:Sialoglycoproteins; D053773:Transforming Growth Factor beta1; D000099311:Dentin Sialophosphoprotein