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Controlled release of simvastatin from in situ forming hydrogel triggers bone formation in MC3T3-E1 Cells

Title
Controlled release of simvastatin from in situ forming hydrogel triggers bone formation in MC3T3-E1 Cells
Authors
Park Y.S.David A.E.Park K.M.Lin C.-Y.Than K.D.Lee K.Park J.B.Jo I.Park K.D.Yang V.C.
Ewha Authors
조인호박윤신
SCOPUS Author ID
조인호scopus; 박윤신scopusscopus
Issue Date
2013
Journal Title
AAPS Journal
ISSN
1550-7416JCR Link
Citation
vol. 15, no. 2, pp. 367 - 376
Indexed
SCIE; SCOPUS WOS scopus
Abstract
Simvastatin (SIM), a drug commonly administered for the treatment of hypercholesterolemia, has been recently reported to induce bone regeneration/formation. In this study, we investigated the properties of hydrogel composed of gelatin-poly(ethylene glycol)-tyramine (GPT) as an efficient SIM delivery vehicle that can trigger osteogenic differentiation. Sustained delivery of SIM was achieved through its encapsulation in an injectable, biodegradable GPT-hydrogel. Cross-linking of the gelatin-based GPT-hydrogel was induced by the reaction of horse radish peroxidase and H 2O2. GPT-hydrogels of three different matrix stiffness, 1,800 (GPT-hydrogel1), 5,800 (GPT-hydrogel2), and 8,400 Pa (GPT-hydrogel3) were used. The gelation/degradation time and SIM release profiles of hydrogels loaded with two different concentrations of SIM, 1 and 3 mg/ml, were also evaluated. Maximum swelling times of GPT-hydrogel1, GPT-hydrogel2, and GPT-hydrogel3 were observed to be 6, 12, and 20 days, respectively. All GPT-hydrogels showed complete degradation within 55 days. The in vitro SIM release profiles, investigated in PBS buffer (pH 7.4) at 37 C, exhibited typical biphasic release patterns with the initial burst being more rapid with GPT-hydrogel1 compared with GPT-hydrogel3. Substantial increase in matrix metalloproteinase-13, osteocalcin expression levels, and mineralization were seen in osteogenic differentiation system using MC3T3-E1 cells cultured with GPT-hydrogels loaded with SIM in a dose-dependent manner. This study demonstrated that controlled release of SIM from a biodegradable, injectable GPT-hydrogel had a promising role for long-term treatment of chronic degenerative diseases such as disc degenerative disease. © 2012 American Association of Pharmaceutical Scientists.
DOI
10.1208/s12248-012-9442-6
Appears in Collections:
의과대학 > 의학과 > Journal papers
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