ABSTRACT
OBJECTIVE@#To discuss the expression of RUNX2 and MDM21 in rats with periodontitis under the chronic intermittent hypoxia.@*METHODS@#A total of 32 SD healthy rats were randomly divided into four groups, with 8 rats in each group. The molecular biological techniques of immunohistochemistry, RT-PCR and Western blotting were employed to detect the effect of different hypoxia time (0, 6, 12, 24 and 48 h) and different concentrations of hypoxia (0.000, 0.001, 0.010, 0.060 and 0.100 ppm) on the expression of RUNX2 and MDM21 in rats of four groups.@*RESULTS@#The expression of RUNX2 and MDM21 in each group was significantly higher than the one at other concentrations when the concentration was 0.010 ppm, with the statistical difference (P normoxic periodontitis group > hypoxia control group > hypoxia periodontitis group under the action with the concentration of 0.010 ppm for 12 h, but there was no significant difference for the comparison among groups (P > 0.05).@*CONCLUSIONS@#The condition of chronic intermittent hypoxia can reduce the expression of RUNX2 and MDM21 in rats with periodontitis and aggravate the damage of periodontal bone.
ABSTRACT
Objective To discuss the expression of RUNX2 and MDM21 in rats with periodontitis under the chronic intermittent hypoxia. Methods A total of 32 SD healthy rats were randomly divided into four groups, with 8 rats in each group. The molecular biological techniques of immunohistochemistry, RT-PCR and Western blotting were employed to detect the effect of different hypoxia time (0, 6, 12, 24 and 48 h) and different concentrations of hypoxia (0.000, 0.001, 0.010, 0.060 and 0.100 ppm) on the expression of RUNX2 and MDM21 in rats of four groups. Results The expression of RUNX2 and MDM21 in each group was significantly higher than the one at other concentrations when the concentration was 0.010 ppm, with the statistical difference (P normoxic periodontitis group > hypoxia control group > hypoxia periodontitis group under the action with the concentration of 0.010 ppm for 12 h, but there was no significant difference for the comparison among groups (P > 0.05). Conclusions The condition of chronic intermittent hypoxia can reduce the expression of RUNX2 and MDM21 in rats with periodontitis and aggravate the damage of periodontal bone.
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the polymorphism of FcgammaRIIIb genotype, IgG G2m(23) factor and their associations with the susceptibility to aggressive periodontitis.</p><p><b>METHODS</b>DNA of white blood cells and serum from 21 aggressive periodontitis patients and 26 healthy controls was extracted. Genotype of FcgammaRIIIb and phenotype of G2m(23) factor was determined by allele-specific PCR and dot immunobinding assay respectively.</p><p><b>RESULTS</b>The frequency of FcgammaRIIIb-NA1/NA1 genotype in aggressive periodontitis patients was significantly higher than in healthy controls (P < 0.05). The ratio of subjects with FcgammaRIIIb-NA1/NA1 genotype and positive G2m(23) factor was higher in aggressive periodontitis patients (11/21) than in health controls (5/26) (P < 0.05). However, no statistical difference in distribution of G2m(23) factor alone was observed between patients and controls.</p><p><b>CONCLUSIONS</b>This study indicates that FcgammaRIIIb-NA1/NA1 genotype may be a susceptible genotype to aggressive periodontitis in Chinese population. Subjects with FcgammaRIIIb NA1/NA1 genotype and positive G2m(23) factor may be more susceptible to aggressive periodontitis.</p>