Aging Cell:"神兽"裸鼹鼠对创伤后骨关节炎的抵抗力极强

2020-10-31 haibei MedSci原创

使用损伤诱导的OA模型进行体内实验,发现NMR对OA有很强的抵抗力。虽然经过类似处理的小鼠出现了严重的软骨退化,但NMRs并没有出现任何OA的迹象。

骨关节炎(OA)是一种慢性退行性关节疾病,其特点是与软骨退化和关节炎症相关的剧烈疼痛。老龄化是OA的主要风险因素,OA是老年人致残的主要原因。

OA是一种病因复杂的退行性疾病,是与年龄相关的软骨退化的结果,也可能与肥胖和创伤性事件,如运动相关的损伤,有关。在老龄化的背景下,随着人口中老年人比例的增加,预计OA患者的数量会逐渐增加。到2030年,OA预计将影响美国四分之一的成年人,成为40岁以上个人发病的主要原因。

目前的治疗方案仅限于姑息治疗:疼痛管理、物理治疗和终末期手术。因此,老年人有一个未被满足的需求,我们需要开发更有效的OA的治疗手段。

最近,研究人在Aging Cell杂志发文,其研究了裸鼹鼠(NMR)作为抵抗OA的潜在模型。NMR是一种小型啮齿动物,最大寿命超过30年,对多种年龄相关疾病有抵抗力。

NMR组织中积累了大量独特的、分子量非常高的透明质酸(HA)。HA是软骨和滑膜液的主要成分。重要的是,HA分子量和软骨刚度都会随着年龄和OA的进展而下降。由于增加聚合物的长度会增加材料刚性,研究人员提出假设,NMR中高分子量HA有助于形成更硬的软骨。

研究人员对NMR软骨的生物力学特性的分析表明,它比小鼠软骨明显更硬。此外,NMR软骨细胞对创伤性损伤有很强的抵抗力。使用损伤诱导的OA模型进行体内实验,发现NMR对OA有很强的抵抗力。虽然经过类似处理的小鼠出现了严重的软骨退化,但NMRs并没有出现任何OA的迹象。

因此,该研究表明,NMRs对OA具有显著的抗性,这种抗性可能是由高分子量的HA赋予的。这项工作表明,NMR是研究OA的有用模型,NMR高分子量HA可能具有治疗OA的潜力。

 

原始出处:

Taketo Taguchi et al. Naked mole‐rats are extremely resistant to post‐traumatic osteoarthritis. Aging Cell (2020). DOI: https://doi.org/10.1111/acel.13255

 

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    2021-07-27 维他命
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    2021-05-27 lisa438
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    2020-11-01 lmm397
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