Screening chronic periodontitis-related genes using whole-genome expression profiling / 中国组织工程研究

ABSTRACT

BACKGROUND: Whole-genome expression profiling is a technical method for gene expression research, with high sensitivity and specificity. This technique can be used to detect differential genes related to chronic periodontitis in the whole genome, therefore efficiently and quickly finding chronic periodontitis-related factors. OBJECTIVE: To screen genes related to chronic periodontitis by using the whole-genome expression profiling. METHODS: Normal periodontal ligament tissue of 15 patients with orthodontic extraction was selected as control group, and periodontal tissue of 21 patients with chronic periodontitis was selected as experimental group. To screen up-regulated and down-regulated genes. the genome-wide expression profile chips of four chronic periodontitis tissues and four healthy tissues were compared. The expression of the differential gene PI3K-Akt signal pathway was verified by real-time PCR (7 normal cases and 13 cases of chronic periodontitis) and western blot (4 normal cases and 4 cases of chronic periodontitis). The experimental protocol was approved by the Ethics Committee of the First Affiliated Hospital of Hainan Medical University (approval No. HNM20180034) and informed consent was obtained from each patient. RESULTS AND CONCLUSION: Analysis of the whole genome expression profile chip revealed that 1 565 up-regulated genes and 1 849 down-regulated genes were significantly differentially expressed in chronic periodontitis samples. The enrichment analysis revealed that the expression of PI3K-Akt signaling pathway was significantly different in chronic periodontitis (P < 0.001). Real-time PCR and western blot assay results indicated that PI3K and Akt expression was higher in the experimental group than in the control group (P < 0.05). All the findings indicate that the genome-wide expression profile chip is fast and highly sensitive to screen the changes in chronic periodontitis-related genes. Significantly differential expression of PI3K-Akt signal pathway in chronic periodontitis provides an experimental basis for the treatment of chronic periodontitis.