46 research outputs found
Predictors and patterns of red blood cell transfusion use among newly diagnosed cancer patients with chemotherapy-associated anemia in Western Denmark (1998â2003)
T-cell and B-cell perturbations identify distinct differences in HIV-2 compared with HIV-1-induced immunodeficiency
Early Immunological Effects of Ischemia-Reperfusion Injury: No Modulation by Ischemic Preconditioning in a Randomised Crossover Trial in Healthy Humans
Ischemic preconditioning (IPC) has been protective against ischemia-reperfusion injury (IRI), but the underlying mechanism is poorly understood. We examined whether IPC modulates the early inflammatory response after IRI. Nineteen healthy males participated in a randomised crossover trial with and without IPC before IRI. IPC and IRI were performed by cuff inflation on the forearm. IPC consisted of four cycles of five minutes followed by five minutes of reperfusion. IRI consisted of twenty minutes followed by 15 min of reperfusion. Blood was collected at baseline, 0 min, 85 min and 24 h after IRI. Circulating monocytes, T-cells subsets and dendritic cells together with intracellular activation markers were quantified by flow cytometry. Luminex measured a panel of inflammation-related cytokines in plasma. IRI resulted in dynamic regulations of the measured immune cells and their intracellular activation markers, however IPC did not significantly alter these patterns. Neither IRI nor the IPC protocol significantly affected the levels of inflammatory-related cytokines. In healthy volunteers, it was not possible to detect an effect of the investigated IPC-protocol on early IRI-induced inflammatory responses. This study indicates that protective effects of IPC on IRI is not explained by direct modulation of early inflammatory events
Effects of Normothermic Machine Perfusion Conditions on Mesenchymal Stromal Cells
Ex-situ normothermic machine perfusion (NMP) of transplant kidneys allows assessment
of kidney quality and targeted intervention to initiate repair processes prior to
transplantation. Mesenchymal stromal cells (MSC) have been shown to possess the
capacity to stimulate kidney repair. Therefore, the combination of NMP and MSC therapy
offers potential to repair transplant kidneys. It is however unknown how NMP conditions
affect MSC. In this study the effect of NMP perfusion fluid on survival, metabolism and
function of thawed cryopreserved human (h)MSC and porcine (p)MSC in suspension
conditions was studied. Suspension conditions reduced the viability of pMSC by 40% in
both perfusion fluid and culture medium. Viability of hMSC was reduced by suspension
conditions by 15% in perfusion fluid, whilst no differences were found in survival in
culture medium. Under adherent conditions, survival of the cells was not affected by
perfusion fluid. The perfusion fluid did not affect survival of fresh MSC in suspension
compared to the control culture medium. The freeze-thawing process impaired the
survival of hMSC; 95% survival of fresh hMSC compared to 70% survival of thawed
hMSC.