Department of Nephrology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China.
Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China.
Theranostics. 2021 Jan 1;11(6):2670-2690. doi: 10.7150/thno.53083. eCollection 2021.
Glucocorticoids are widely used in the treatment of nephritis, however, its dose-dependent side effects, such as the increased risk of infection and metabolic disturbances, hamper its clinical use. This study reports a visualized podocyte-targeting and focused ultrasound responsive glucocorticoid nano-delivery system (named as Dex/PFP@LIPs-BMS-α), which specific delivers dexamethasone (Dex) to podocyte targets and reduces systemic side effects. The glucocorticoid nano-delivery system was synthesized by a lipid thin film and a simple facile acoustic-emulsification method. This glucocorticoid nano-delivery system used BMS-470539 (BMS-α), a synthetic compound, as a "navigator" to specifically identify and target the melanocortin-1 receptor (MC-1R) on podocytes. The loaded perfluoropentane (PFP) realizes the directed "explosion effect" through ultrasound-targeted microbubble destruction (UTMD) technology under the coordination of low intensity focused ultrasound (LIFU) to completely release Dex. Both and experiments have demonstrated that Dex/PFP@LIPs-BMs-α accurately gathered to podocyte targets and improved podocyte morphology. Moreover, , proteinuria and serum creatinine levels were significantly reduced in the group treated with Dex/PFP@LIPs-BMS-α, and no severe side effects were detected. Furthermore, Dex/PFP@LIPs-BMS-α, with capabilities of ultrasound, photoacoustic and fluorescence imaging, provided individualized visual guidance and the monitoring of treatment. This study provides a promising strategy of Dex/PFP@LIPs-BMS-α as effective and safe against immune-associated nephropathy.
糖皮质激素广泛用于肾炎的治疗,但其剂量依赖性的副作用,如感染和代谢紊乱风险增加,限制了其临床应用。本研究报道了一种可视化足细胞靶向和聚焦超声响应的糖皮质激素纳米递药系统(命名为 Dex/PFP@LIPs-BMS-α),它特异性地将地塞米松(Dex)递送到足细胞靶点,减少全身副作用。该糖皮质激素纳米递药系统通过脂质薄膜和简单的声乳化方法合成。该糖皮质激素纳米递药系统使用合成化合物 BMS-470539(BMS-α)作为“导航器”,特异性识别和靶向足细胞上的黑素皮质素-1 受体(MC-1R)。负载的全氟戊烷(PFP)通过低强度聚焦超声(LIFU)协调的超声靶向微泡破坏(UTMD)技术实现定向“爆炸效应”,以完全释放 Dex。体内和体外实验均表明,Dex/PFP@LIPs-BMS-α 准确聚集到足细胞靶点,并改善了足细胞形态。此外,Dex/PFP@LIPs-BMS-α 治疗组的蛋白尿和血清肌酐水平显著降低,且未检测到严重的副作用。此外,Dex/PFP@LIPs-BMS-α 具有超声、光声和荧光成像能力,为个体化可视化指导和治疗监测提供了可能。本研究为 Dex/PFP@LIPs-BMS-α 作为治疗免疫相关性肾炎的有效且安全的策略提供了新的思路。