RESUMO
PURPOSE: Endothelial progenitor cells (EPCs) play a key role in tissue repair and regeneration. Previous studies have shown that infusion of human umbilical cord blood-derived endothelial colony-forming cells improves outcomes in mice subjected to experimental traumatic brain injury (TBI). However, the efficiency of cell transplantation is not satisfactory. Oxidative stress plays a significant role in the survival of transplanted cells following ischemic reperfusion injury. This observational clinical study investigated the correlation between the number of circulating EPCs and plasma levels of superoxide dismutase (SOD) and malonyldialdehyde (MDA). MATERIALS AND METHODS: Peripheral blood samples were collected from 20 patients with mild TBI at day-1, day-2, day-3, day-4, and day-7 post TBI. The number of circulating EPCs and the plasma levels of SOD and MDA were measured. RESULTS: The average of circulating EPCs in TBI patients decreased initially, but increased thereafter, compared with healthy controls. Plasma levels of SOD in TBI patients were significantly lower than those in healthy controls at day-4 post-TBI. MDA levels showed no difference between the two groups. Furthermore, when assessed on day-7 post-TBI, the circulating EPC number were correlated with the plasma levels of SOD and MDA. CONCLUSION: These results suggest that the number of circulating EPCs is weakly to moderately correlated with plasma levels of SOD and MDA at day-7 post-TBI, which may offer a novel antioxidant strategy for EPCs transplantation after TBI.
Assuntos
Animais , Humanos , Camundongos , Lesões Encefálicas , Transplante de Células , Estudo Clínico , Células Progenitoras Endoteliais , Malondialdeído , Estresse Oxidativo , Plasma , Regeneração , Traumatismo por Reperfusão , Superóxido Dismutase , Transplantes , Cordão UmbilicalRESUMO
Vascular remodeling is not only the pathologic cause of circulation dysfunction and vascular disease such as hypertension and diabetes,but also can accelerate the process of dysfunction and failure of target organs.To reverse vascular remodeling has been one of the clinical aims.Kidney is one of the critical common target organs of many kinds of diseases such as diabetes and hypertension.The main part of the intrarenal resistance comes from the intrarenal small arteries,and the remodeling of intrarenal small arteries can reduce the blood supply of kidney and lead to excessive activation of neuroendocrine system as well their vicious cycle,resulting a terrible prognosis together with kidney and other target organs failure.This paper reviews the advance of vascular remodeling especially in the intrarenal small arteries.