The Radiology Department of Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Taiyuan, 030032, China; Shanxi Medical University, Taiyuan 030001, China.
Shanxi Medical University, Taiyuan 030001, China.
Acta Biomater. 2022 Jul 15;147:327-341. doi: 10.1016/j.actbio.2022.05.034. Epub 2022 May 25.
Rhabdomyolysis-induced acute kidney injury (AKI) is closely related to toxic reactive oxygen species (ROS), apoptosis, and inflammation. Excessive activation of poly (ADP-ribose) polymerase-l (PARP-1) by ROS can cause mitochondrial dysfunction and release of the proapoptotic protein AIF, which triggers an intrinsic PARP-1-dependent cell death program. Considering these characteristics of rhabdomyolysis-induced AKI, we developed a targeting nanodrug delivery platform by loading PJ34 and coupling anti-GPR97 with melanin nanoparticles (GMP nanoparticles) that could realize photoacoustic self-monitoring and triple-collaborative treatment (antioxidant, antiapoptotic, and anti-inflammatory). The nanoparticles exhibited good dispersibility, solubility, and broad-spectrum ROS scavenging ability. In vitro experiments revealed high biocompatibility of the GMP nanoparticles and strong ability of scavenging multiple toxic ROS, antiapoptotic activity, and anti-inflammatory activity. Because melanin nanoparticles possess inherent photoacoustic (PA) imaging capability, they can not only serve as a drug carrier but also perform self-monitoring for real-time tracking of GMP biodistribution and renal uptake in a murine AKI model through PA imaging. In vivo experiments showed that the GMP nanoparticles could effectively reduce oxidative stress, apoptosis, and inflammatory response in mice with rhabdomyolysis-induced AKI, and the mechanism of alleviation was verified through western blot experiments. These results indicated that the nanoplatform could realize the targeted delivery and curative effect monitoring under the guidance of PA imaging, which is of great significance for the prevention and treatment of AKI. STATEMENT OF SIGNIFICANCE: A targeting nanodrug delivery platform was developed by loading PJ34 and coupling anti-GPR97 with melanin nanoparticles (GMP nanoparticles) for photoacoustic self-monitoring and triple-collaborative treatment (antioxidant, antiapoptotic, and anti-inflammatory) of acute kidney injury (AKI). Further studies indicated that the Keap-1/Nrf2/HO-1 and PARP-1/AIF signaling pathways are involved in the therapeutic mechanisms to alleviate AKI. Immunohistochemical staining and routine blood test confirmed the anti-inflammatory performance of GMP nanoparticles. Compared to exogenous nanomaterials, we used endogenous melanin with broad ROS scavenging capacity as the nanocarrier and antioxidant, which not only overcomes the defects of high specificity, potential toxicity, low loading capacity, and high cost but also shows good biosafety and photoacoustic imaging performance in vivo.
肌红蛋白尿性急性肾损伤(AKI)与毒性活性氧(ROS)、细胞凋亡和炎症密切相关。ROS 可过度激活多聚(ADP-核糖)聚合酶 1(PARP-1),导致线粒体功能障碍和促凋亡蛋白 AIF 的释放,从而触发内在的 PARP-1 依赖性细胞死亡程序。鉴于肌红蛋白尿性 AKI 的这些特征,我们开发了一种通过加载 PJ34 并将抗 GPR97 与黑色素纳米颗粒(GMP 纳米颗粒)偶联的靶向纳米药物递送平台,该平台可以实现光声自监测和三重协同治疗(抗氧化、抗细胞凋亡和抗炎)。纳米颗粒表现出良好的分散性、溶解性和广谱 ROS 清除能力。体外实验表明 GMP 纳米颗粒具有良好的生物相容性和强大的清除多种毒性 ROS、抗细胞凋亡和抗炎活性的能力。由于黑色素纳米颗粒具有固有光声(PA)成像能力,它们不仅可以作为药物载体,还可以通过 PA 成像在 AKI 小鼠模型中进行自监测,实时跟踪 GMP 的生物分布和肾摄取。体内实验表明,GMP 纳米颗粒可有效降低肌红蛋白尿性 AKI 小鼠的氧化应激、细胞凋亡和炎症反应,通过 Western blot 实验验证了缓解机制。这些结果表明,该纳米平台可以在 PA 成像的指导下实现靶向递药和疗效监测,这对 AKI 的防治具有重要意义。
声明:本研究通过加载 PJ34 并将抗 GPR97 与黑色素纳米颗粒(GMP 纳米颗粒)偶联,构建了一种用于光声自监测和三重协同治疗(抗氧化、抗细胞凋亡和抗炎)的靶向纳米药物递送平台,用于急性肾损伤(AKI)的治疗。进一步的研究表明,Keap-1/Nrf2/HO-1 和 PARP-1/AIF 信号通路参与了治疗机制,以缓解 AKI。免疫组织化学染色和常规血液检查证实了 GMP 纳米颗粒的抗炎性能。与外源性纳米材料相比,我们使用具有广谱 ROS 清除能力的内源性黑色素作为纳米载体和抗氧化剂,不仅克服了特异性高、潜在毒性、载药能力低和成本高的缺陷,而且在体内还表现出良好的生物安全性和光声成像性能。
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