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Epoprostenol and treprostinil are prostacyclins indicated for the treatment of pulmonary arterial hypertension (PAH). Although there is literature describing the conversion of intravenous (IV) epoprostenol to IV treprostinil or IV treprostinil to oral treprostinil, there is little data on the direct conversion of IV epoprostenol to oral treprostinil. In this case, we describe the direct conversion of IV epoprostenol to oral treprostinil without an intermediary conversion to IV treprostinil. A 39 year-old female with PAH was admitted for altered mental status and self-removal of her peripherally inserted central catheter (PICC) used for IV epoprostenol. Given the unplanned hospitalization, absence of a dedicated central line for IV prostacyclin therapy, and concern the patient may remove a future subcutaneous line, the patient was transitioned to oral treprostinil. Of note, despite triple PAH therapy, the patient was unable to reach a low risk group based on her prognostic risk assessment. A right heart cars without reported adverse effects.In Alzheimer's disease (AD) models, AD risk variants in the microglial-expressed TREM2 gene decrease Aβ plaque-associated microgliosis and increase neuritic dystrophy as well as plaque-associated seeding and spreading of tau aggregates. Whether this Aβ-enhanced tau seeding/spreading is due to loss of microglial function or a toxic gain of function in TREM2-deficient microglia is unclear. Depletion of microglia in mice with established brain amyloid has no effect on amyloid but results in less spine and neuronal loss. Microglial repopulation in aged mice improved cognitive and neuronal deficits. In the context of AD pathology, we asked whether microglial removal and repopulation decreased Aβ-driven tau seeding and spreading. https://www.selleckchem.com/products/cb-839.html We show that both TREM2KO and microglial ablation dramatically enhance tau seeding and spreading around plaques. Interestingly, although repopulated microglia clustered around plaques, they had a reduction in disease-associated microglia (DAM) gene expression and elevated tau seeding/spreading. Together, these data suggest that TREM2-dependent activation of the DAM phenotype is essential in delaying Aβ-induced pathological tau propagation.Cellular therapy with regulatory T cells (Tregs) has shown promising results for suppressing graft-versus-host disease (GVHD) while preserving graft vs tumor effects in animal models and phase 1/2 clinical trials. However, a paucity of Tregs in the peripheral blood makes it difficult to acquire sufficient numbers of cells and hampers further clinical application. Invariant natural killer T (iNKT) cells constitute another compartment of regulatory cells that ameliorate GVHD through activation of Tregs after their own activation with α-galactosylceramide (α-GalCer) or adoptive transfer. We demonstrate here that a single administration of α-GalCer liposome (α-GalCer-lipo) enhanced the in vivo expansion of Tregs after adoptive transfer in a murine GVHD model and improved therapeutic efficacy of Treg therapy even after injection of otherwise suboptimal cell numbers. Host iNKT cells rather than donor iNKT cells were required for GVHD suppression because the survival benefit of α-GalCer-lipo administration was not shown in the transplantation of cells from wild-type (WT) C57BL/6 mice into Jα18-/- iNKT cell-deficient BALB/c mice, whereas it was observed from Jα18-/- C57BL/6 donor mice into WT BALB/c recipient mice. The combination of iNKT cell activation and Treg adoptive therapy may make Treg therapy more feasible and safer by enhancing the efficacy and reducing the number of Tregs required.Neutrophils help to clear pathogens and cellular debris, but can also cause collateral damage within inflamed tissues. Prolonged neutrophil residency within an inflammatory niche can exacerbate tissue pathology. Using both genetic and pharmacological approaches, we show that BCL-XL is required for the persistence of neutrophils within inflammatory sites in mice. We demonstrate that a selective BCL-XL inhibitor (A-1331852) has therapeutic potential by causing apoptosis in inflammatory human neutrophils ex vivo. Moreover, in murine models of acute and chronic inflammatory disease, it reduced inflammatory neutrophil numbers and ameliorated tissue pathology. In contrast, there was minimal effect on circulating neutrophils. Thus, we show a differential survival requirement in activated neutrophils for BCL-XL and reveal a new therapeutic approach to neutrophil-mediated diseases.The clinicopathologic features of DNA methyltransferase 3A (DNMT3A)-mutated de novo acute myeloid leukemia (AML), and the significance of variant type, variant allele frequency (VAF), and multiple concomitant DNMT3A mutations, remain poorly defined. We examined 104 DNMT3A-mutated de novo AML patients from 2 major centers. Most (82%) had normal karyotype (NK); R882H variants were frequent(38%). The most commonly comutated genes included nucleophosmin (NPM1; 53%), Fms-related tyrosine kinase 3 (FLT3)-internal tandem duplication (25%), IDH1 (23%), IDH2 (23%), and TET2 (21%). Patients with high DNMT3A VAF at diagnosis (≥44%; DNMT3AHIGH) had more significant leukocytosis and higher blast counts in peripheral blood and bone marrow. DNMT3AHIGH cases were associated with much shorter event-free survival (EFS; 14.1 vs 56.8 months) and overall survival (OS; 18.3 months vs not reached) compared with cases of patients with low DNMT3A (DNMT3ALOW). Thirteen patients had 2 DNMT3A variants and similar VAFs at diagnosis that tracked together at multiple time points after chemotherapy and/or stem cell transplantation (SCT). In multivariable analyses performed in NK patients who received standard induction chemotherapy, presence of 2 DNMT3A mutations (hazard ratio [HR] = 3.192; P = .038) and SCT in first complete remission (HR = 0.295; P = .001) independently affected EFS; increasing marrow blast percentage (HR = 1.026; P = .025), high DNMT3A VAF (HR = 3.003; P = .010), and 2 DNMT3A mutations (HR = 4.816; P = .020) had independent effects on OS. These data support the adverse prognostic significance of DNMT3AHIGH reveal a novel association between 2 concomitant DNMT3A mutations and inferior outcome in DNMT3A-mutated de novo AML with a NK.
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