https://www.selleckchem.com/products/CX-3543.html 05). The AACS of dialysis patients was negatively correlated with ENPP1 value (r=-0.70). Compared to no/mild calcification patients, the levels of serum ENPP1 in patients with moderate/severe calcification were decreased significantly (p < 0.01). The severity of vascular calcification was correlated with serum ENPP1 value, the severer the vascular calcification, the lower the serum ENPP1 level, and the difference was statistically significant (all p < 0.05). The area under ROC curve of ENPP1 was 0.90, the corresponding sensitivity was 0.86, and the specificity was 0.87. Levels of serum ENPP1 in non-diabetic ESRD patients are negatively related to the severity of abdominal aortic vascular calcification. Levels of serum ENPP1 in non-diabetic ESRD patients are negatively related to the severity of abdominal aortic vascular calcification.Gold nanoparticles (AuNPs) pose a great challenge in the development of nanotracers that can self-adaptively alter their properties in response to certain cellular environments for long-term stem cell tracking. Herein, pH-sensitive Au nanotracers (CPP-PSD@Au) are fabricated by sequential coupling of AuNPs with sulfonamide-based polymer (PSD) and cell-penetrating peptide (CPP), which can be efficiently internalized by mesenchymal stem cells (MSCs) and undergo pH-induced self-assembly in endosomes, facilitating long-term computed tomography (CT) imaging tracking MSCs in a murine model of idiopathic pulmonary fibrosis (IPF). Using the CPP-PSD@Au, the transplanted MSCs for the first time can be monitored with CT imaging for up to 35 days after transplantation into the lung of IPF mice, clearly elucidating the migration process of MSCs in vivo. Moreover, we preliminarily explored the mechanism of the CPP-PSD@Au labeled MSCs in the alleviation of IPF, including recovery of alveolar integrity, decrease of collagen deposition, as well as down-regulation of relevant cytokine level. This work faci