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Bioactive Polyglycolic Acid (PGA) or Polylactic Acid (PLA) Polymers on Extracellular Matrix Mineralization in Osteoblast-like Mc3T3-E1 Cells  

Cho, Young-Eun (Dept. of Food Science and Nutrition, Andong National University)
Kim, Hye-Jin (Dept. of Food Science and Nutrition, Andong National University)
Kim, Yong-Ha (Dept. of Plastic & Reconstructive Surgery, College of Medicine, Yeungnam University)
Choi, Jae-Won (Dept. of Plastic & Reconstructive Surgery, College of Medicine, Yeungnam University)
Kim, Youn-Jung (Dept. of Chemistry, Andong National University)
Kim, Gab-Joong (Dept. of Chemistry, Andong National University)
Kim, Jin-Su (Dept. of Chemistry, Andong National University)
Choi, Sik-Young (Dept. of Chemistry, Andong National University)
Kwun, In-Sook (Dept. of Food Science and Nutrition, Andong National University)
Publication Information
Nutritional Sciences / v.9, no.4, 2006 , pp. 233-239 More about this Journal
Abstract
Porous matrices of bioactive polymers such as polyglycolic acid (PGA) or polylactic acid (PLA) can be used as scaffolds in bone tissue growth during bone repair process. These polymers are highly porous and serve as a template for the growth and organization of new bone tissues. We evaluated the effect of PGA and PLA polymers on osteoblastic MC3T3-E1 cell extracellular mineralization. MC3T3-E1 cells were cultured in a time-dependent manner -1, 15, 25d as appropriate - for the period of bone formation stages in one of the five culture circumstances, such as normal osteogenic differentiation medium, PGA-plated, fetal bovine serum (FBS)-plated, PGA/FBS-coplated, and PLA-plated For the evaluation of bone formation, minerals (Ca, Mg, Mn) and alkaline phosphatase activity, a marker for osteoblast differentiation, were measured Alizarin Red staining was used for the measurement of extracellular matrix Ca deposit During the culture period, PGA-plated one was reabsorbed into the medium more easily and faster than the PLA-plated one. At day 15, at the middle stage of bone formation, cellular Ca and Mg levels showed higher tendency in PGA- or PLA-plated treatments compared to non-plated control and at day 25, at the early late stage of bone formation, all three cellular Ca, Mg or Mn levels showed higher tendency as in order of PGA-related treatments and PLA-plated treatments, compared to control even without significance. Medium Ca, Mg or Mn levels didn't show any consistent tendency. Cellular ALP activity was higher in the PGA- or PLA-plated treatments compare to normal osteogenic medium treatment PGA-plated and PGA/FBS-plated treatments showed better Ca deposits than other treatments by measurement of Alizarin Red staining, although PLA-plated treatment also showed reasonable Ca deposit. The results of the present study suggest that biodegradable material, PGA and also with less extent for PLA, can be used as a biomaterial for better extracellular matrix mineralization in osteoblastic MC3T3-E1 cells.
Keywords
Polyglycolic acid (PGA); Polylactic acid (PLA); MC3T3-E1 cells; Osteoblast; Extracellular mineralization;
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