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An injectable self-adaptive polymer as a drug carrier for the treatment of nontraumatic early-stage osteonecrosis of the femoral head
Bone Research ( IF 12.7 ) Pub Date : 2022-03-12 , DOI: 10.1038/s41413-022-00196-y
Ning Kong 1 , Hang Yang 2 , Run Tian 1 , Guanzhi Liu 1 , Yiyang Li 1 , Huanshuai Guan 1 , Qilu Wei 1 , Xueshan Du 3 , Yutian Lei 1 , Zhe Li 1 , Ruomu Cao 1 , Yiwei Zhao 1 , Xiaohui Wang 4 , Kunzheng Wang 1 , Pei Yang 1
Affiliation  

Core decompression (CD) with the elimination of osteonecrotic bone is the most common strategy for treating early-stage nontraumatic osteonecrosis of the femoral head (ONFH). Adjuvant treatments are widely used in combination with CD as suitable methods of therapy. Existing augmentations have to be fabricated in advance. Here, we report a novel injectable glycerin-modified polycaprolactone (GPCL) that can adapt to the shape of the CD cavity. GPCL shows great flowability at 52.6 °C. After solidification, its compressive modulus was 120 kPa at body temperature (37 °C). This excellent characteristic enables the polymer to provide mechanical support in vivo. In addition, GPCL acts as a carrier of the therapeutic agent zoledronic acid (ZA), demonstrating sustained release into the CD region. ZA-loaded GPCL was injected into ONFH lesions to treat early-stage nontraumatic cases. Compared to that in the CD group, CD+ZA-loaded GPCL injection preserved bone density and increased the collagen level in the femoral head. At the interface between the GPCL and CD tunnel wall, osteogenesis was significantly promoted. In addition, morphological evaluations revealed that the femoral heads in the CD+ZA-GPCL group exhibited improved pressure resistance. These results suggest a strategy effective to preserve the bone density of the femoral head, thus decreasing the possibility of femoral head collapse. This novel injectable polymer has, therefore, considerable potential in clinical applications.



中文翻译:

一种可注射的自适应聚合物作为药物载体治疗非创伤性早期股骨头坏死

去除骨坏死骨的核心减压(CD)是治疗早期非创伤性股骨头坏死(ONFH)的最常见策略。作为合适的治疗方法,辅助治疗广泛与 CD 结合使用。现有的增强必须提前制造。在这里,我们报告了一种可以适应 CD 腔形状的新型可注射甘油改性聚己内酯 (GPCL)。GPCL 在 52.6 °C 时表现出极佳的流动性。凝固后,其在体温(37℃)下的压缩模量为120 kPa。这种优异的特性使聚合物能够在体内提供机械支持。此外,GPCL 可作为治疗剂唑来膦酸 (ZA) 的载体,可向 CD 区域持续释放。将载有 ZA 的 GPCL 注射到 ONFH 病变中以治疗早期非创伤性病例。与CD组相比,载有CD+ZA的GPCL注射液保留了骨密度并增加了股骨头中的胶原蛋白水平。在 GPCL 和 CD 隧道壁之间的界面,成骨显着促进。此外,形态学评估显示,CD+ZA-GPCL 组的股骨头表现出更好的抗压性。这些结果表明了一种有效保持股骨头骨密度的策略,从而降低了股骨头塌陷的可能性。因此,这种新型可注射聚合物在临床应用中具有相当大的潜力。载有 CD+ZA 的 GPCL 注射保留了骨密度并增加了股骨头中的胶原蛋白水平。在 GPCL 和 CD 隧道壁之间的界面,成骨显着促进。此外,形态学评估显示,CD+ZA-GPCL 组的股骨头表现出更好的抗压性。这些结果表明了一种有效保持股骨头骨密度的策略,从而降低了股骨头塌陷的可能性。因此,这种新型可注射聚合物在临床应用中具有相当大的潜力。载有 CD+ZA 的 GPCL 注射保留了骨密度并增加了股骨头中的胶原蛋白水平。在 GPCL 和 CD 隧道壁之间的界面,成骨显着促进。此外,形态学评估显示,CD+ZA-GPCL 组的股骨头表现出更好的抗压性。这些结果表明了一种有效保持股骨头骨密度的策略,从而降低了股骨头塌陷的可能性。因此,这种新型可注射聚合物在临床应用中具有相当大的潜力。这些结果表明了一种有效保持股骨头骨密度的策略,从而降低了股骨头塌陷的可能性。因此,这种新型可注射聚合物在临床应用中具有相当大的潜力。这些结果表明了一种有效保持股骨头骨密度的策略,从而降低了股骨头塌陷的可能性。因此,这种新型可注射聚合物在临床应用中具有相当大的潜力。

更新日期:2022-03-12
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