关节软骨核心化调节了骨关节炎中的组织弹性
Kentaro Homan1, Tomohiro Onodera1, Hisatoshi Hanamatsu2
1Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
eLife
|March 11, 2024
概括
改变的N-甘氨酸结构之前的骨关节炎 (OA) 软骨退化. 产后fucosylation可以预防早期的骨关节炎,识别疾病进展风险的关键葡萄糖表型.
科学领域:
- 生物化学 生物化学
- 葡萄糖生物学 葡萄糖生物学
- 整形外科 整形外科 整形外科
背景情况:
- 骨关节炎 (OA) 是一种具有复杂潜在机制的退行性关节疾病.
- 早期发现和了解OA的发病因子对于有效的干预至关重要.
- 甘氨酸的改变与各种病理过程有关,但它们在早期骨关节炎中的具体作用尚不清楚.
研究的目的:
- 为了研究骨关节炎 (OA) 中的前组织学甘氨酸结构变化.
- 阐明甘氨酸形状变化影响软骨退化的机制.
- 为了确定早期OA风险分层的潜在葡萄糖表型.
主要方法:
- 使用曼诺西达酶注射建立子OA模型.
- 在人类OA软骨样本中分析糖.
- 在小鼠模型中抑制N-甘氨酸核心化.
- 在OA模型中,软骨特异性阻断核心化.
主要成果:
- 曼诺酶注射减少了高曼诺的N-甘氨酸,诱导了软骨退化.
- 在人体OA软骨中确定了特定的核心基化N-甘氨酸模式.
- 抑制N-甘氨酸核心化导致小鼠无法恢复的软骨退化.
- 软骨特异性的核心化封锁加速了老化和不稳定模型中的OA发展.
结论:
- 产后的α1,6 fucosyltransferase活性对于预防骨关节炎前软骨恶化至关重要.
- 关节炎软骨的新型葡萄糖表型可以区分患有疾病进展风险较高的个体.
- 这些发现为早期的OA提供了新的定义,该定义基于糖配置文件.
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