Mesostructured Materials with Controllable Long-Range Orientational Ordering and Anisotropic Properties.

Inorganic-organic mesophase materials provide a wide range of tunable properties, which are often highly dependent on their nano-, micro-, or meso-scale compositions and structures. Among these are macroscopic orientational order and corresponding anisotropic material properties, the adjustability of which are difficult to achieve. This is due to the complicated transient and coupled transport, chemical reaction, and surface processes that occur during material syntheses.

Modeling control and transduction of electrochemical gradients in acid-stressed bacteria.

Transmembrane electrochemical gradients drive solute uptake and constitute a substantial fraction of the cellular energy pool in bacteria. These gradients act not only as "homeostatic contributors," but also play a dynamic and keystone role in several bacterial functions, including sensing, stress response, and metabolism. At the system level, multiple gradients interact with ion transporters and bacterial behavior in a complex, rapid, and emergent manner; consequently, experiments alone cannot untangle their interdependencies.

Identification of Microorganisms that Bind Specifically to Target Materials of Interest Using a Magnetophoretic Microfluidic Platform.

Discovery of microorganisms and their relevant surface peptides that specifically bind to target materials of interest can be achieved through iterative biopanning-based screening of cellular libraries having high diversity. Recently, microfluidics-based biopanning methods have been developed and exploited to overcome the limitations of conventional methods where controlling the shear stress applied to remove cells that do not bind or only weakly bind to target surfaces is difficult and the overall experimental procedure is labor-intensive. Despite the advantages of such microfluidic methods and successful demonstration of their utility, these methods still require several rounds of iterative biopanning.

Ambient air pollution exposure assessments in fertility studies: A systematic review and guide for reproductive epidemiologists.

Purpose Of Review: We reviewed the exposure assessments of ambient air pollution used in studies of fertility, fecundability, and pregnancy loss.

Recent Findings: Comprehensive literature searches were performed in the PUBMED, Web of Science, and Scopus databases. Of 168 total studies, 45 met the eligibility criteria and were included in the review.

Pathways linking maternal mental health and child health in a dual burden context: Evidence from Galapagos, Ecuador.

Research in low-and-middle income countries links maternal depression to child undernutrition; conversely, maternal depression is a risk factor for child overweight in higher income settings. Less is known about impacts of maternal mental health in dual burden contexts or the environmental and behavioral pathways linking maternal mental health to child health outcomes. Consequently, we examine the association between maternal mental health and the dual burden of undernutrition/infectious disease and overweight/obesity in children and test whether pathogenic, dietary and caregiving exposures mediate this association.

Distinguishing Aroclor and non-Aroclor sources to Chicago Air.

Many polychlorinated biphenyl (PCB) congeners are found in both legacy Aroclor mixtures and modern materials, and both contribute to PCBs levels in ambient air. The various sources of PCBs make it difficult to quantify the relative importance of emissions from remaining legacy materials and emissions of PCBs released from production and use of modern products. To address this challenge, we utilized active and passive sampling, analytical methods optimized for PCBs, and Positive Matrix Factorization (PMF) and cos theta to examine the chemical signature of PCBs in Chicago air.

Treatment utilization patterns of newly initiated oral anticancer agents in a national sample of Medicare beneficiaries.

Few studies have examined oral anticancer treatment utilization patterns among Medicare beneficiaries. To assess treatment utilization patterns of newly initiated oral anticancer agents across national samples of Medicare beneficiaries for 5 cancer types: chronic myeloid leukemia (CML), multiple myeloma (MM), metastatic prostate cancer (mPC), metastatic renal cell carcinoma (mRCC), and metastatic breast cancer (mBC). This retrospective claims analysis used 100% Medicare Chronic Condition Data Warehouse (CCW) Parts A, B, and D files from 2011 to 2014 (for CML, MM, mPC, and mRCC patients) and a 5% random fee-for-service sample from 2011 to 2013 (for mBC patients).

Uncovering Burdens, Examining Needs, and Shedding Assumptions of Evidence-Based Social Support Programs for Mothers: A Descriptive Qualitative Study in a Remote Community.

Many studies have demonstrated a significant burden of maternal stress and depression for women living on the Galápagos Islands. Here, we aim to uncover burdens and needs of women with young children on San Cristóbal Island and then explore options for implementing evidence-based programs of social support to meet these needs. We conducted 17 semi-structured qualitative interviews with mothers of young children, healthcare workers, and community stakeholders.

Room-to-Room Variability of Airborne Polychlorinated Biphenyls in Schools and the Application of Air Sampling for Targeted Source Evaluation.

Airborne polychlorinated biphenyl (PCB) concentrations are higher indoors than outdoors due to their historical use in building materials and their presence in modern paints and surface treatments. For some populations, including school children, PCB levels indoors result in inhalation exposures that may be greater than or equivalent to exposure through diet. In a school, PCB exposure may come from multiple sources.

Maternal precarity and HPA axis functioning shape infant gut microbiota and HPA axis development in humans.

Background: Early life exposure to adverse environments, and maternal stress in particular, has been shown to increase risk for metabolic diseases and neurobehavioral disorders. While many studies have examined the hypothalamic-pituitary-adrenal axis (HPA axis) as the primary mechanism behind these relationships, emerging research on the brain-gut axis suggests that the microbiome may play a role. In this study, we tested the relationships among maternal precarity and HPA axis dysregulation during the peripartum period, infant gut microbiome composition, and infant HPA axis functioning.

Bioelectronic control of a microbial community using surface-assembled electrogenetic cells to route signals.

We developed a bioelectronic communication system that is enabled by a redox signal transduction modality to exchange information between a living cell-embedded bioelectronics interface and an engineered microbial network. A naturally communicating three-member microbial network is 'plugged into' an external electronic system that interrogates and controls biological function in real time. First, electrode-generated redox molecules are programmed to activate gene expression in an engineered population of electrode-attached bacterial cells, effectively creating a living transducer electrode.

Thioguanine restoration through type I photosensitization-superoxide oxidation-glutathione reduction cycles.

UVA-induced deleterious effect of thiopurine prodrugs including azathioprine, 6-mercaptopurine and 6-thioguanine (6-TG) increases the risk of cancer development due to the incorporation of 6-TG in patients' DNA. The catalytic mechanism by which thiobases act as a sustained oxidant producer has yet to be explored, especially through the Type I electron transfer pathway that produces superoxide radicals (O2˙-). Under Fenton-like conditions O2˙- radicals convert to extremely reactive hydroxyl radicals (˙OH), thus carrying even higher risk of biological damage than that induced by the well-studied type II reaction.

Low Sustainment of High-Dose Oral Medication Regimens for Advanced Parkinson's Disease in Medicare Beneficiaries.

Background: Increasing doses of oral antiparkinson medications are indicated in advanced Parkinson's disease (PD), but little is known about sustainment of high-dose regimens.

Objective: To investigate sustainment of high-dose oral medication regimens in Medicare beneficiaries with incident advanced PD.

Methods: This retrospective cohort study utilized 100%fee-for-service Medicare claims from 2011-2013.

Maternal stress, placental 11β-hydroxysteroid dehydrogenase type 2, and infant HPA axis development in humans: Psychosocial and physiological pathways.

Introduction: Prenatal stress is known to influence fetal hypothalamic-pituitary-adrenal axis (HPA axis) development. Placental 11β-hydroxysteroid dehydrogenase type 2 (HSD11B2) is a central gene in this pathway, but little is known about what influences its functioning. We assess how maternal distress influences HSD11B2 functioning, and how HSD11B2 in turn, is associated with infant HPA axis development.

Burden of Parkinson's Disease by Severity: Health Care Costs in the U.S. Medicare Population.

Background: Current understanding of the health care costs of Parkinson's disease (PD) and the incremental burden of advanced disease is incomplete.

Objectives: The aim of this study was to assess the direct economic burden associated with advanced versus mild/moderate PD in a prevalent national sample of elderly U.S.

Use of a medication-based algorithm to identify advanced Parkinson's disease in administrative claims data: Associations with claims-based indicators of disease severity.

Introduction: Lack of a gold standard definition for advanced Parkinson's Disease (APD), coupled with absence of disease severity information in diagnostic codes, hinders use of large administrative databases for conducting population health and comparative effectiveness studies.

Methods: Using pharmacy claims data, we created an algorithm to identify APD: any 30-day average levodopa equivalent dose (LED) >1000 mg/day. Using 2013 100% U.

Omalizumab Treatment Patterns Among Patients with Asthma in the US Medicare Population.

Background: Asthma in older adults is associated with high rates of morbidity and mortality; similarly, asthma can be severe enough among younger adults to warrant disability benefits. Reasons for poor outcomes in both groups of patients may include discontinuation and lack of adherence to controller therapies.

Objective: To examine characteristics and treatment patterns of US Medicare patients initiating omalizumab for asthma, and factors associated with its discontinuation and adherence.

Biofunctionalized Cellulose Nanofibrils Capable of Capture and Antiadhesion of Fimbriated .

In this study, naturally derived cellulose nanofibrils (CNFs), a renewable and easily modified nanomaterial with low cytotoxicity, were rendered bioactive via one-step functionalization with mannopyranoside (CNFs-mannose) for use as a new glyconanomaterial platform for control of bacterial pathogenesis. The recognition affinity of the bioactive surfaces toward fimbriated was assessed using genetically engineered strains as well as wild-type (WT) MG1655 bacteria. The results revealed high surface coverages of FimH+ (with overexpressed FimH) and WT bacteria on the films of CNFs-mannose due to specific interaction between prevalent mannose on nanofibrils and FimH receptors on fimbriae.

Comparative Survival Associated With Use of Targeted vs Nontargeted Therapy in Medicare Patients With Metastatic Renal Cell Carcinoma.

Importance: Targeted therapies for advanced renal cell carcinoma (RCC) have shown increased tolerability and survival advantages over older treatments in clinical trials, but understanding of real-world survival improvements is still emerging.

Objective: To compare overall and RCC-specific survival associated with use of targeted vs nontargeted therapy for metastatic RCC.

Design, Setting, And Participants: This retrospective cohort study used Surveillance, Epidemiology, and End Results-Medicare data from 2000 to 2013 to examine patients with stage IV (distant) clear cell RCC at the time of diagnosis who received any targeted or nontargeted therapy.

PCB Emissions from Paint Colorants.

Polychlorinated biphenyls (PCBs) are known human carcinogens that are byproducts of pigment manufacturing and found in colorants used to tint consumer paints sold in the United States and elsewhere. PCBs have the potential to be emitted from paint containing these pigments. To quantify the gas-phase emissions of ∑PCBs, we used polyurethane foam (PUF) to capture emissions from freshly applied colorants.

Rising rates of cesarean delivery in Ecuador: Socioeconomic and institutional determinants over two decades.

Background: Ecuador's cesarean delivery rate far exceeds that recommended by the Pan American Health Organization (PAHO) and the World Health Organization (WHO). Using data from three iterations of Ecuador's nationally representative, population-based survey Encuesta Nacional de Salud y Nutrición (ENSANUT/ENDEMAIN), spanning 23 years, this study examines women's mode of delivery outcomes by sociodemographic characteristics and hospital type (private, public, social security) in light of Ecuador's major health care reform over the past two decades.

Methods: Using data from the 1994, 2004, and 2012 iterations of the data set, we analyzed trends in cesarean delivery based on province, year, and institution of care.

Pathways linking caesarean delivery to early health in a dual burden context: Immune development and the gut microbiome in infants and children from Galápagos, Ecuador.

Objectives: Global increases in caesarean deliveries are exposing more infants to perinatal environments that are evolutionarily novel and potentially increasing their risks for inflammatory conditions. Yet, the pathways linking caesareans to later health outcomes are not well understood, particularly in dual burden contexts. We test two of the hypothesized pathways, altered immune function and gut microbiota, which may link delivery mode to later health outcomes and test whether these associations persist when controlling for postnatal nutritional and pathogenic exposures.