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Effect of Glucose at High Concentrations on the Apoptosis of the Cultured Periodontal Ligament Cells and Osteoblasts  

Park, Sung-Ho (Department of Oral Anatomy, School of Dentistry, Kyung Hee University)
Jue, Seong-Suk (Department of Oral Anatomy, School of Dentistry, Kyung Hee University)
Hong, Jung-Pyo (Department of Oral Medicine, School of Dentistry, Kyung Hee University)
Shin, Je-Won (Department of Oral Anatomy, School of Dentistry, Kyung Hee University)
Publication Information
Journal of Oral Medicine and Pain / v.32, no.4, 2007 , pp. 357-364 More about this Journal
Abstract
This experiment was designed to clarify the effect of extracellular glucose on the osteoblasts and periodontal ligament cells. The cells were incubated for 24 and 48 hours with ${\alpha}$-MEM including 1,000 mg/L (control group) and 4,500 mg/L (experimental group) of glucose. Then, the expressions of caspase-3, p38 MAPK, JNK-1, and ERK-1 were examined using Elisa assay and Western blot. The results were as follows: 1. The expression of caspase-3 and p38 MAPK was increased by the high extracellular glucose in both cells. 2. The expression of caspase-3 and p38 MAPK was increased greatly in the periodontal ligament cells than the E1 cells by the high extracellular glucose. 3. The expression of JNK-1 was increased by the high extracellular glucose in both cells. 4. The expression of ERK-1 was not changed by the high extracellular glucose in both cells. These results suggest that extracellular glucose at high concentrations may inhibit the periodontal regeneration process increasing cellular apoptosis. And p38 MAPK and JNK-1 pathway may be the most responsible intracellular pathway rather than ERK-1.
Keywords
Glucose; Osteoblast; Periodontal ligament cell; Apoptosis; p38 MAPK; JNK-1;
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