UV-adVISor: Attention-Based Recurrent Neural Networks to Predict UV-Vis Spectra.

Ultraviolet-visible (UV-Vis) absorption spectra are routinely collected as part of high-performance liquid chromatography (HPLC) analysis systems and can be used to identify chemical reaction products by comparison to the reference spectra. Here, we present UV-adVISor as a new computational tool for predicting the UV-Vis spectra from a molecule's structure alone. UV-Vis prediction was approached as a sequence-to-sequence problem. We utilized Long-Short Term Memory and attention-based neural networks with Extended Connectivity Fingerprint Diameter 6 or molecule SMILES to generate predictive models for the UV spectra. We have produced two spectrum datasets (dataset I, N = 949, and dataset II, N = 2222) using different compound collections and spectrum acquisition methods to train, validate, and test our models. We evaluated the prediction accuracy of the complete spectra by the correspondence of wavelengths of absorbance maxima and with a series of statistical measures (the best test set median model parameters are in parentheses for model II), including RMSE (0.064), R2 (0.71), and dynamic time warping (DTW, 0.194) of the entire spectrum curve. Scrambling molecule structures with the experimental spectra during training resulted in a degraded R2, confirming the utility of the approaches for prediction. UV-adVISor is able to provide fast and accurate predictions for libraries of compounds.

Synthesis of [15 N]-cholamine bromide hydrobromide.

[15 N]-Cholamine is an isotope tag for metabolomics research, because it possesses 2 important properties: an NMR active isotope and a permanent charge for MS sensitivity. Here, we present a scalable synthesis of [15 N]-cholamine.

Dimethyl Itaconate Is Not Metabolized into Itaconate Intracellularly.

Itaconic acid is an important metabolite produced by macrophages after stimulation with LPS. The role of itaconate in the inflammatory cascade is unclear. Here we used [13C]itaconate and dimethyl [13C]itaconate (DMI) to probe itaconate metabolism, and find that [13C]DMI is not metabolized to itaconate. [13C]Itaconate in the cell culture medium leads to elevated intracellular levels of unlabeled succinate, with no evidence of intracellular uptake. The goal of this study is to encourage the development of effective pro-drug strategies to increase the intracellular levels of itaconate, which will enable more conclusive analysis of its action on macrophages and other cell and tissue types.

Designing and Testing an End-of-Life Discussion Intervention for African American Patients With Heart Failure and Their Families.

There is an escalating prevalence of heart failure (HF) with high mortality. Compared with other races, African Americans face a higher incidence of HF at earlier age of onset, with more rapid progression, and with increased family care burden and greater care costs and disparity in health care services at the end of life (EOL). Concomitant out-of-pocket HF costs and care demands indicate the need for early discussion of palliative and EOL care needs. We therefore developed and pilot tested a culturally sensitive intervention specific to the needs of African American HF patients and their families at the EOL. Our pilot study findings encompass patient and caregiver perspectives and align with the state of EOL science. The ultimate long-term goal of this intervention strategy is to translate into practice the preferred, culturally sensitive, and most cost-efficient EOL care recommendations for HF patients and families.

Utilization and determinants of palliative care in the trauma intensive care unit: results of a national survey.

BACKGROUND: There is a paucity of data evaluating utilization of palliative care in trauma intensive care units. AIM: We sought to determine current indications and determinants of palliative care consultation in the trauma intensive care units. DESIGN: Using a cross-sectional assessment, we surveyed trauma surgeons to understand indications, benefits, and barriers trauma surgeons perceive when consulting palliative care. SETTING/PARTICIPANTS: A total of 1232 surveys were emailed to all members of the Eastern Association for the Surgery of Trauma. RESULTS: A total of 362 providers responded (29% response rate). Majority of respondents were male (n = 287, 80.2%) and practiced in Level 1 (n = 278, 77.7%) trauma centers. Most common indicators for referral to palliative care were expected survival 1 week to 1 month, multisystem organ dysfunction >3 weeks, minimal neurologic responsiveness >1 week, and referral to hospice. In post hoc analysis, there was a significant difference in frequency of utilization of palliative care when respondents had access to board-certified palliative care physicians (χ(2) = 56.4, p < 0.001). Although half of the respondents (n = 199, 55.6%) reported palliative care consults beneficial all or most of the time, nearly still half (n = 174, 48.6%) felt palliative care was underutilized. Most frequent barriers to consultation included resistance from families (n = 144, 40.2%), concerns that physicians were "giving up" (n = 109, 30.4%), and miscommunication of prognosis (n = 98, 27.4%) or diagnosis (n = 58, 16.2%) by the palliative care physician. CONCLUSION: Although a plurality of trauma surgeons reported palliative care beneficial, those surveyed indicate that palliative care is underutilized. Barriers identified provide important opportunities to further appropriate utilization of palliative care services.

A Platform for the Detection of Trypanosomes via Selective Small Molecule Recognition.

Trypanothione (TSH2), a metabolite unique to trypanosomal parasites, was evaluated as a potential biomarker for trypanosomal infection using fluorescence as the means of detection. Fluoroescein arsenical helix binder (FLASH) was prepared and used to detect TSH2. Since it has low background fluorescence and forms a highly emissive complex with TSH2, it can be used to detect low micromolar concentrations of TSH2 in serum. The large dynamic range of FLASH and its selectivity for detection of the dithiol metabolite indicate that arsenical probes may offer a promising new platform for the diagnosis of trypanosomal infection.

Case of desmoplastic infantile ganglioglioma secreting ceruloplasmin.

Desmoplastic infantile ganglioglioma is a rare World Health Organization (WHO) grade I tumor commonly arising in early infancy and usually presenting with both solid and cystic components. We report a case of a large midline-enhancing desmoplastic infantile ganglioglioma in which newly formed cysts in communication with lateral ventricles contained highly proteinaceous fluid. Proteomic analysis of the fluid showed three proteins not normally found in cerebrospinal fluid. Immunohistochemical analysis of the tumor sample showed that the desmoplastic infantile ganglioglioma produced a high concentration of ceruloplasmin, which probably accounts for most of the 30- to 40-fold increase in protein compared with normal cerebrospinal fluid. To our knowledge, this is the first report of ceruloplasmin secretion by a brain tumor, and ongoing studies on the mechanism might yield novel approaches to reducing cyst production and protein content in an otherwise stable solid tumor.