Bank Winters (appealsaw4)

Introduction Small cell lung cancer (SCLC) is the most aggressive subtype of lung cancer and though most patients initially respond to platinum-based chemotherapy, resistance rapidly develops. Immunotherapy has promise in the treatment of lung cancer, however SCLC patients exhibit poor overall responses highlighting the necessity for alternative approaches. Natural killer (NK) cells are an alternative to T cell-based immunotherapies, that do not require sensitization to antigens presented on the surface of tumor cells. Methods We investigated the immunophenotype of human SCLC tumors by both flow cytometry on fresh samples and bioinformatic analysis. check details Cell lines generated from murine SCLC were transplanted into mice lacking key cytotoxic immune cells. Subcutaneous tumor growth, metastatic dissemination and the activation of CD8+ T and NK cells were evaluated by histology and flow cytometry. Results Transcriptomic analysis of human SCLC tumors revealed heterogeneous immune checkpoint and cytotoxic signature profiles. Utilizing sophisticated genetically engineered mouse models, we demonstrated that the absence of NK cells, but not CD8+ T cells, significantly enhanced metastatic dissemination of SCLC tumor cells in vivo. Moreover, hyperactivation of NK cell activity through augmentation of IL-15 or TGF-β signaling pathways ameliorated SCLC metastases, an effect which was enhanced when combined with anti-PD1 therapy. Conclusions These proof-of-principle findings provide a rationale for exploiting the anti-tumor functions of NK cells in the treatment of SCLC patients. Moreover, the distinct immune profiles of SCLC subtypes reveal an unappreciated level of heterogeneity that warrants further investigation in the stratification of patients for immunotherapy.The aim of this rat study was to investigate the effect of liquid intake on the oral bioavailability of an amorphous solid dispersion (ASD) containing the poorly water-soluble compound ABT-869. To this end, an ASD was prepared by hot-melt extrusion and administered in form of powder in an open gelatin capsule. The study consisted of three arms (1) administration of the ASD without any liquid, (2) administration of the ASD with 1.5 mL of water, and (3) administration of a suspension of crystalline drug in water. Administration of the ASD without water resulted in a 4-fold higher exposure as compared to the suspension of crystalline drug. When administered together with water, the in vivo performance of the ASD was dramatically affected and not superior to that of the suspension of crystalline drug. The observed phenomena could not be explained mechanistically, but may be related to the following effects (I) a faster dissolution in a larger volume of fluid and subsequent precipitation, (II) a change in gastrointestinal transit time that caused a mismatch between dissolution rate and absorption rate, and/or (III) a difference in the mucosal adherence/distribution pattern caused by the gelatin capsule. It remains to be investigated whether the phenomena observed in this study are exceptionally pronounced or even unique for this particular formulation. Yet, our findings emphasize that the amount of liquid co-administered with oral enabling formulations can have an impact on the bioavailability. The administration regime used in animal studies should therefore be considered carefully.Hydrogels are peculiar soft materials formed by a 3D polymeric network surrounded by water molecules. In these systems the mechanical and the chemical energy are well balanced and an applied external stimulus (mechanical or chemical) can cause a distinctive response, where the contributions of the mechanics and the mass transport are combined to form a "poroviscoelastic" behavior. In this work the poroviscoelastic behavior of the agarose gels has been investigated, from the experimental and modeling points of view, by applications of external mechanical stimuli. The pure gel, brought in the