Acute myeloid leukemia (AML) with t(6;9)(p23;q34) is well known to have a poor prognosis treated with chemotherapy and autotransplantation. The presence of this karyotype is an indicator for ...allogeneic hematopoietic stem cell transplantation (HSCT); however, the impact of t(6;9)(p23;q34) on the HSCT outcome remains unclear. We conducted a matched-pair analysis of de novo AML patients with and without t(6;9)(p23;q34) using data obtained from the Japanese HSCT data registry. A total of 57 patients with t(6;9)(p23;q34) received transplants between 1996 and 2007, and 171 of 2056 normal karyotype patients matched for age, disease status at HSCT and graft source were selected. The overall survival, disease-free survival, cumulative incidence of relapse and the non-relapse mortality in t(6;9)(p23;q34) patients were comparable to those for normal karyotype patients. A univariate analysis showed that t(6;9)(p23;q34) had no significant impact on the overall survival. These findings suggest that allogeneic HSCT may overcome the unfavorable impact of t(6;9)(p23;q34) as an independent prognostic factor.
Primary graft failure (pGF) is associated with considerable morbidity and mortality. Salvage hematopoietic SCT (HSCT) can rescue pGF patients; however, the optimal preconditioning regimen and stem ...cell source are yet to be determined, particularly in children. In this study, we retrospectively analyzed 102 pediatric patients who received salvage allogeneic HSCT for pGF. Salvage HSCT from matched or one-Ag-mismatched related donors (rMM01) provided superior OS compared with that from two- or three-Ags-mismatched related donors (rMM23) or cord blood transplantation (CBT). CBT showed a trend toward a slightly lower engraftment rate and late engraftment achievement compared with rMM23; however, the OS rate was similar between the two groups (47.6±7.7% for rMM23 and 45.7±8.6% for CBT, at 1 year after salvage HSCT). Multivariate analysis showed that preconditioning regimens with fludarabine or irradiation were associated with a higher engraftment rate and those with alkylating agents were associated with better OS. In conclusion, our results showed that rMM01 was the most suitable donor for salvage HSCT for pediatric pGF, and that CBT was an equally important option compared with rMM23 for patients without rMM01.
The aim of this retrospective study was to assess the usefulness of potential predictors of poor prognosis in IgA nephropathy in children. The study population consisted of 55 children aged 11 ± ...4 years, diagnosed on the basis of the Oxford classification and MEST score of kidney biopsy findings. Proteinuria, glomerular filtration rate (GFR), and the IgA/C3 serum ratio were assessed in all patients twice: at onset and at follow-up. The patients were treated with steroids, immunosuppressive drugs, and/or angiotensin-converting enzyme inhibitors. Follow-up was at 3.9 ± 2.9 (median 2.7) years. The patients were subdivided into two groups: with GFR <90 and ≥90 mL/min at follow-up. ROC AUC curves and logistic regression were used to evaluate the power of prognostic factors. The two groups did not differ regarding the level of proteinuria, MEST score, and the IgA/C3 ratio at onset of disease. There was a significant association between GFR reductions at onset and follow-up (AUC = 0.660; p < 0.05). In patients with nephrotic range proteinuria at onset, proteinuria at follow-up was more frequent compared with other patients (AUC = 0.760; p < 0.05), MEST score ≥3 tended to be associated with reduced GFR (AUC = 0.650; p = 0.07) but not with proteinuria (AUC = 0.608; p = 0.47), and the IgA/C3 ratio was higher (p < 0.05) at follow-up. No significant associations were found between the IgA/C3 ratio at onset and reduced GFR (AUC = 0.565; p = 0.46) or proteinuria at follow-up (AUC = 0.263; p = 0.20). We conclude that predictors of poor outcome in childhood IgAN include the following: GFR reduction, nephrotic range proteinuria at onset of disease, and high MEST score in Oxford classification of kidney biopsy. Despite a higher serum IgA/C3 ratio in children with impaired renal function in long-term follow-up, we failed to demonstrate a significant association between this ratio at onset of disease and reduced GFR or persistent proteinuria at follow-up. Thus, IgA/C3 ratio is not a good foreteller of progression of IgA nephropathy in childhood.
Regulatory T cells (Treg) have an essential role in maintaining immune tolerance in the gut. The functional CD4⁺ Treg express the transcription factor forkhead box protein 3 (FoxP3) or a CD25high in ...humans. Further, depletion of elevated granulocytes/monocytes by extracorporeal adsorption (GMA) induces immunomodulation in patients with ulcerative colitis (UC). We investigated the impact of GMA on Treg. Thirty-one UC patients, clinical activity index (CAI) 12·1 ± 2·97, refractory to conventional medications including intravenous corticosteroid and 13 healthy controls (HC), were included. Patients received five GMA sessions over 5 weeks. Biopsies from the rectal mucosa and blood samples at baseline and post-GMA were immunostained with anti-CD4/FoxP3 and anti-CD4/CD25 antibodies for immunohistochemistry and flow cytometry. Following GMA, 22 of 31 patients achieved remission (CAI less-than or equal to 4, P < 0·01) and their endoscopic activity index decreased from 10·6 ± 2·32 to 4·75 ± 1·48 (P = 0·003). The circulating CD4⁺CD25high⁺ Treg level was low and increased markedly in responders (P < 0·02). In the nine non-responders, the baseline CD4⁺CD25high⁺ Treg level was about 50% of the level in the responders (P < 0·03) or in the HC (P < 0·01), and all nine had to undergo colectomy. Conversely, the number of CD4⁺/FoxP3⁺ mucosal Treg in GMA responders decreased significantly after the fifth GMA session compared with the baseline level (P < 0·05). It is believed that the CD4⁺ Treg has an essential role in the control of immune pathology in UC patients and a net influx of these cells from the circulation into the mucosa may proceed to suppress inflammation. GMA can impact the circulating as well as the mucosal levels of Treg.
To study the effects of M-CSF administration on long-term outcomes of unrelated BMT, we retrospectively analyzed data from patients transplanted through the Japan Marrow Donor Program. We obtained ...data from 54 patients who received M-CSF just after BMT and 500 patients who did not receive M-CSF or G-CSF acted as controls. There were no significant differences between the two cohorts with respect to OS, acute GVHD or relapse. Although the incidence of chronic GVHD was comparable between the two groups, extensive chronic GVHD was observed significantly less often in the M-CSF cohort than in the control group. Multivariate analysis identified M-CSF as a significant factor for attenuating extensive chronic GVHD (relative risk: 0.73; 95% confidence interval: 0.55-0.94; P=0.012). We also found the same results in matched-pair analysis. Our observation suggests the potential for clinical use of M-CSF to dampen severe chronic GVHD.
Allogeneic hematopoietic SCT (allo-HCT) from matched sibling donor (MSD) is recommended for younger patients with intermediate cytogenetic risk AML in first CR (CR1), whereas the role of alternative ...donor transplants in these patients is unknown. We retrospectively analyzed 605 patients with intermediate-risk AML, who received myeloablative allo-HCT in CR1. The 4-year OS for MSD (n=290) and matched unrelated donor (MUD; n=141) was 65% and 68% (P=0.50), respectively. In multivariate analysis, MUD had a similar risk of overall mortality as MSD (hazard ratio=0.90; 95% confidence interval, 0.62-1.30; P=0.58), whereas older age, female donor/male recipient (FDMR) combination, and requiring more than one course of induction chemotherapy to achieve CR1 were poor prognostic factors for OS. Thus, OS after MUD HCT with sex combinations other than FDMR was significantly higher than that after MSD HCT from female donors to male recipients (4-year OS 72% versus 55%, P=0.04). These results suggest that HCT, not only from MSD, but also from MUD, should be considered in younger patients with intermediate-risk AML in CR1, and that the donor-recipient sex combination is more important than the donor type in donor selection.
1. In dentate gyrus of rat hippocampal slices two distinct types of neurons, principal excitatory neurons (granule cells) and local inhibitory neurons (basket cells), could be identified under ...Nomarski microscopy; I investigated the actions of serotonin using the whole-cell patch-clamp technique. The identification of the neurons was later confirmed by intracellular staining with Lucifer yellow. 2. In both basket cells and granule cells, whole-cell current recordings revealed spontaneous synaptic currents ranging from < 10 pA to > 200 pA in symmetrical Cl- conditions at a holding potential of -63 mV. These currents were blocked by 10 microM bicuculline, indicating that they resulted from the spontaneous activation of GABAergic inputs (which had been morphologically described in both types of neurons). 3. By focal application of serotonin (2-50 microM) to basket cells under current clamp I evoked a train of action potentials superimposed on a baseline membrane depolarization. Under voltage-clamp conditions serotonin evoked an inward current at a holding potential of -63 mV (currents were detectable in approximately 90% of basket cells studied). The inward current was accompanied by a multitude of small inward currents of short duration (< 100 ms) that were found to be due to the stimulation by serotonin of nearby GABAergic presynaptic neurons innervating the recorded neuron. 4. In granule cells (total of 11 cells) serotonin did not produce any responses under conditions similar to those used for basket cells. The occurrence of bicuculline-sensitive spontaneous synaptic current events seemed to increase during the application of serotonin; this phenomenon reflected the excitatory action of serotonin exclusively on GABAergic interneurons. 5. The serotonin-induced inward currents in basket cells were mediated by the 5-HT3 receptor subtype because 1) they were blocked by either metoclopramide (10 microM) or 3-alpha-tropanyl-1H-indolecarboxylic acid ester (2 nM), the latter being a specific blocker for the 5-HT3 receptor subtype, and 2) almost similar currents were induced by the application of the selective 5-HT3 receptor agonist 2-methyl 5-HT (2-50 microM) or 1-(m-chlorophenyl)-biguanide (0.1-10 microM). 6. Current-voltage (I-V) relations of serotonin-induced currents in basket cells showed that the reversal potential was close to 0 mV in external standard saline and depended on the concentrations of monovalent cations. I-V relations of serotonin-induced currents revealed inward rectification at the membrane potential range of +30 to -60 mV.
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