Humans ; Periodontal Diseases ; prevention & control ; therapy ; Translational Medical Research

Evidence-Based Medicine ; standards ; Humans ; Periodontal Diseases ; diagnosis ; therapy ; Research Design

Anti-Infective Agents ; administration & dosage ; therapeutic use ; Dental Plaque ; therapy ; Humans ; Periodontal Diseases ; drug therapy

History, 20th Century ; History, 21st Century ; Periodontics ; history

Adult ; Anti-Bacterial Agents ; administration & dosage ; Humans ; Male ; Periodontal Diseases ; therapy ; Subgingival Curettage ; Treatment Outcome

Fibromatosis, Gingival ; diagnosis ; Gingival Overgrowth ; diagnosis ; therapy ; Humans

Humans ; Periodontal Diseases ; therapy

Alveolar Bone Loss ; surgery ; Humans ; Molar ; injuries ; surgery ; Periodontitis ; surgery ; Tooth Root ; injuries ; surgery

[Objective]To investigation the relavant genes to the pathogenesis and metastasis of osteosarcoma,and to discuss the significance of gene expression in the pathogenesis and metastasis of osteosarcoma. [Method]Two well-known ATCC osteosarcoma cell lines and an osteoblastic cell line were collected.After the total RNA was extracted,the finally synthesized biotinylated cRNAs were hybridized to SBC arrays.After the design and synthethesis of the primers,four of the differentially expressed genes were then chosen at random to further confirm the array results using the SYBR Green real-time RT-PCR method in freshly collected osteosarcoma specimens and the cell lines.The data analysis depended on the ABI Prism 7300 system.[Result]By an entrance limit of ≥2.0 or ≤0.5,189 up-regulated and 84 dowm-regulated genes which were considerable differentially expressed in the two osteosarcoma cell lines compared with the osteoblastic cell line hfob1.19 were finally detected.Many of the genes were first reported to be related to the pathogenesis of osteosarcoma.The array results were further confirmed by the real-time RT-PCR.[Conclusion]Many genes are involved in the pathogenesis and metastasis of osteosarcoma.It is helpful to apply gene array to find the laws of gene expression and to study the gene-gene interactional relationships in this tumor.