Background: Recent studies suggest that immunotherapy using T regulatory cells (Tregs) prolongs remission in type 1 diabetes (T1DM). Here, we report factors that possibly affect the efficacy of this treatment. Methods: The metabolic and immune background of 12 children with recently diagnosed T1DM, as well as that of untreated subjects, during a 2-year follow-up is presented. Patients were treated with up to 30 × 10⁶/kg b.w. of autologous expanded CD3⁺CD4⁺CD25^highCD127⁻ Tregs. Results: The disease progressed and all patients were insulin-dependent 2 years after inclusion. The β-cell function measured by c-peptide levels and the use of insulin were the best preserved in patients treated with two doses of Tregs (3/6 in remission), less so after one dose (1/6 in remission) and the worst in untreated controls (no remissions). Increased levels of Tregs could be seen in peripheral blood after their adoptive transfer together with the shift from naïve CD62L⁺CD45RA⁺ to memory CD62L⁺CD45RA⁻ Tregs. Increasing serum levels of proinflammatory cytokines were found: IL6 increased in all subjects, while IL1 and TNFα increased only in untreated group. Therapeutic Tregs were dependent on IL2, and their survival could be improved by other lymphocytes. Conclusions: The disease progression was associated with changing proportions of naïve and memory Tregs and slowly increasing proinflammatory activity, which was only partially controlled by the administered Tregs. The therapeutic cells were highly dependent on IL2. We conclude that the therapy should be administered at the earliest to protect the highest possible mass of islets and also to utilize the preserved content of Tregs in the earlier phases of T1DM. Trial registrationhttp://www.controlled-trials.com/ISRCTN06128462; registered retrospectively

Of anesthesia, QTc interval, heart rate, and noninvasive arterial blood pressure were measured. Prolongation of the QTc interval was observed within the first minute of anesthesia. There were no differences in QTc interval changes between sexes at any time. We conclude that desflurane prolongs the QTc interval, but that there are no differences between genders in sensitivity to this action....

Side effects of spinal anesthesia include arterial hypotension and bradycardia. Both of them may be induced by sympathetic nerve blockade as well as by the Bezold-Jarisch reflex, which may be mediated by peripheral serotonin receptors (5-HT(3) type). The aim of this study was to verify the hypothesis that blockade of type 3 serotonin receptors by intravenous ondansetron administration might reduce hypotension and bradycardia induced by spinal anesthesia. Seventy-one patients participated in the study; 36 in the ondansetron group (receiving 8 mg intravenous ondansetron), and 35 in the placebo group (receiving isotonic NaCl solution). Measurements of heart rate and arterial blood pressure were taken every 5 minutes after spinal anesthesia was performed with 4 mL 0.5% hyperbaric bupivacaine solution. Decreases in mean, systolic, and diastolic arterial pressure as well as in heart rate, compared with baseline values were observed in both groups. Minimal systolic and mean blood pressure values obtained over a 20-minute observation period were significantly higher in the ondansetron group. There were no significant differences in diastolic blood pressure and heart rate values between the groups. Ondansetron given intravenously attenuates the fall of systolic and mean blood pressure, but does not have an influence on diastolic blood pressure or heart rate.