Natural Cell Patches: Melanin Nanoparticles for MR Imaging‐Guided Antiatherosclerosis Therapy via Attenuating Macrophage Pyroptosis (Adv. Funct. Mater. 13/2023)

Zu, Zi Yue; Sheng, Jie; Qi, Jianchen; Yu, Miao; Zhang, Yunming; Zheng, Tao; Xiang, Kaiyan; Wu, Haoguang; Lu, Guangming; Zhang, Longjiang

doi:10.1002/adfm.202370078

Cited by 1 publication

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“…Polydopamine (PDA) is a major pigment of natural eumelanin with favorable biocompatibility and biodegradability, which is widely used for various biomedical applications. 29 As a kind of polyphenol-containing material, the PDA and its analogues exhibit strong ROS scavenging capacity and are broadly used for antioxidant therapy of various diseases, 30 such as AKI, 31 antiatherosclerosis, 32 ischemic stroke, 33 periodontitis, 34 myocardial infarction, 35 senescence, 36 and osteoarthritis. 37 As the PDA possesses a strong chelating ability toward Fe 3+ , the presence of PDA is hoped to purify the ROS generated by the Fe-based Fenton reaction and endows the as-prepared nanoagents with selfpurification capability.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired BSA@polydopamine@Fe Nanoprobe with Self-Purification Capacity for Targeted Magnetic Resonance Imaging of Acute Kidney Injury

Zou,

Chen,

et al. 2024

ACS Nano

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Contrast-enhanced magnetic resonance imaging (CE-MRI) of acute kidney injury (AKI) is severely hindered by the poor targeting capacity and potential toxicity of current contrast agents. Herein, we propose one-step fabrication of a bovine serum albumin@polydopamine@Fe (BSA@PDA@Fe, BPFe) nanoprobe with self-purification capacity for targeted CE-MRI of AKI. BSA endows the BPFe nanoprobe with renal tubule-targeting ability, and PDA is capable of completely inhibiting the intrinsic metal-induced reactive oxygen species (ROS), which are always involved in Fe/ Mn-based agents. The as-prepared nanoprobe owns a tiny size of 2.7 nm, excellent solubility, good T 1 MRI ability, superior biocompatibility, and powerful antioxidant capacity. In vivo CE-MRI shows that the BPFe nanoprobe can accumulate in the renal cortex due to the reabsorption effect toward the serum albumin. In the AKI model, impaired renal reabsorption function can be effortlessly detected via the diminishment of renal cortical signal enhancement. More importantly, the administration of the BPFe nanoprobe would not aggravate renal damage of AKI due to the outstanding self-purification capacity. Besides, the BPFe nanoprobe is employed for CE-MR angiography to visualize fine vessel structures. This work provides an MRI contrast agent with good biosafety and targeting ability for CE-MRI of kidney diseases.

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