长期的DSPP单质缺陷会在小鼠中引起关节骨关节炎
Qilin Liu1,2, Yitong Zhao1,2, Haibo Shi1,2
1Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Jilin University, Changchun, China.
BMC oral health
|May 14, 2024
概括
在小鼠中,长期丧失丹丁西亚洛福蛋白 (DSPP) 功能会导致关节骨关节炎 (TMJ OA). 这项研究表明,DSPP的哈普洛缺陷会导致关节瘤随着时间的推移而发展.
科学领域:
- 生物材料科学 生物材料科学
- 整形外科 整形外科 整形外科
- 遗传学 是一个遗传学.
背景情况:
- 细胞外矩阵 (ECM) 缺陷可以导致关节骨关节炎 (TMJ OA).
- 牙状状蛋白 (DSPP) 是下状状软骨中的一个ECM蛋白,对软骨完整性至关重要.
- 在此之前,DSPP损失对关节瘤发展的长期影响尚不清楚.
研究的目的:
- 为了调查长期的DSPP平分不充足是否会导致TMJ OA.
- 在DSPP缺乏的小鼠中分析TMJ OA的进展和潜在机制.
主要方法:
- 微型计算机断层扫描 (微型CT) 和对野生类型 (WT),Dspp+/-和Dspp小鼠下的组织形态测量分析.
- 随着时间的推移,对Dspp+/-和WT小鼠的状软骨进行放射学,组织学和免疫组织化学分析.
- RNA测序以确定受DSPP缺陷影响的分子通路.
主要成果:
- Dspp+/-小鼠表现出下丘陵骨质量,密度和厚度的减少,这表明骨质疏松症.
- 组织学分析显示,Dspp+/-小鼠的状软骨裂,稀疏,细胞数量减少,以及亚冠骨腔,随着年龄的增长而恶化.
- 在DSPP+/-小鼠中观察到骨质细胞分布增加和炎症标记物 (MMP2,IL-6,FN-1,TLR4) 的表达升高.
结论:
- 发生的DSPP不足导致小鼠的时间依赖的TMJ OA.
- 关节OA病变的特征是下阴道骨的低矿化和下带状软骨的破坏.
- 炎症标志物的上调有助于DSPP-haploinsufficient小鼠中TMJ OA的发展.
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