骨关节炎
医学
软骨
颞下颌关节
微阵列分析技术
免疫组织化学
病理
微阵列
废气再循环1
内科学
基因表达
内分泌学
基因
生物
解剖
替代医学
生物化学
作者
Hongyun Zhang,Qian Liu,Jinqiang Liu,Jing Wang,Hongxu Yang,Xiaojie Xu,Mianjiao Xie,Xiaodong Liu,Shibin Yu,Mian Zhang,Lei Lü,Jing Zhang,Meiqing Wang
摘要
Abstract Biomarkers of temporomandibular joint (TMJ) osteoarthritis (OA) remain unknown. The objective was to detect whether molecular biomarkers from peripheral blood leucocytes (PBLs) engage in TMJ OA lesions. Thirty‐four six‐week‐old Sprague Dawley rats were used. The top upregulated gene ontology categories and gene‐fold changes in PBLs were detected by a microarray analysis comparing rats that received 20‐week unilateral anterior crossbite (UAC) treatment with age‐matched controls (n = 4). Twenty weeks of UAC treatment had been reported to induce TMJ OA‐like lesions. The other twenty‐four rats were randomly placed in the UAC and control groups at 12‐ and 20‐week time points (n = 6). The mRNA expression levels of the selected biomarkers derived from the microarray analysis and their protein expression in the alveolar bone and TMJ were detected. The microarray analysis indicated that the three most highly involved genes in PBLs were Egr1 , Ephx1 and Il10 , which were confirmed by real‐time PCR detection. The increased protein expression levels of the three detected molecules were demonstrated in cartilage and subchondral bone ( P < 0.05), and increased levels of EPHX1 were reported in discs ( P < 0.05); however, increased levels were not present in the alveolar bone. Immunohistochemistry revealed the increased distribution of EGR1‐positive, EXPH1‐positive and IL10‐positive cells predominantly in the osteochondral interface, with EXPH1 also present in TMJ discs. In conclusion, the increased mRNA expression of Egr1, Ephx1 and Il10 in PBLs may serve as potential biomarkers for developed osteoarthritic lesions relating to osteochondral interface hardness changes induced by dental biomechanical stimulation.
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