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https://www.readbyqxmd.com/read/29115293/intracellular-production-of-hydrogels-and-synthetic%C3%A2-rna-granules-by-multivalent-molecular%C3%A2-interactions
#1
Hideki Nakamura, Albert A Lee, Ali Sobhi Afshar, Shigeki Watanabe, Elmer Rho, Shiva Razavi, Allister Suarez, Yu-Chun Lin, Makoto Tanigawa, Brian Huang, Robert DeRose, Diana Bobb, William Hong, Sandra B Gabelli, John Goutsias, Takanari Inoue
Some protein components of intracellular non-membrane-bound entities, such as RNA granules, are known to form hydrogels in vitro. The physico-chemical properties and functional role of these intracellular hydrogels are difficult to study, primarily due to technical challenges in probing these materials in situ. Here, we present iPOLYMER, a strategy for a rapid induction of protein-based hydrogels inside living cells that explores the chemically inducible dimerization paradigm. Biochemical and biophysical characterizations aided by computational modelling show that the polymer network formed in the cytosol resembles a physiological hydrogel-like entity that acts as a size-dependent molecular sieve...
November 6, 2017: Nature Materials
https://www.readbyqxmd.com/read/29112764/sleep-apnea-and-kidney-function-trajectory-results-from-a-20-year-longitudinal-study-of-healthy-middle-aged-adults
#2
Muna T Canales, Erika W Hagen, Jodi H Barnet, Paul E Peppard, Stephen F Derose
Objective: To determine whether sleep apnea, defined by polysomnography, accelerates kidney function decline in generally healthy adults not selected for sleep apnea or kidney disease. Methods: We performed a retrospective cohort study 855 participants from the Wisconsin Sleep Cohort Study (WSCS), a large 20-year population-based study of sleep apnea, who had at least one polysomnogram and serial measurements of serum creatinine over time. Sleep apnea was defined as an apnea-hypopnea index ≥15 or positive airway pressure (PAP) use at baseline...
November 3, 2017: Sleep
https://www.readbyqxmd.com/read/29099140/mapping-platinum-adducts-on-yeast-ribosomal-rna-using-high-throughput-sequencing
#3
Kory Plakos, Victoria J DeRose
Methods to map small-molecule binding sites on cellular RNAs are important for understanding interactions with both endogenous and exogenous compounds. Pt(ii) reagents are well-known DNA and RNA crosslinking agents, but sequence-specific and genome-wide identification of Pt targets following in-cell treatment is challenging. Here we describe application of high-throughput 'Pt-Seq' to identify Pt-rRNA adducts following treatment of S. cerevisiae with cisplatin.
November 3, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29059378/characterization-of-the-aplf-fha-xrcc1-phosphopeptide-interaction-and-its-structural-and-functional-implications
#4
Kyungmin Kim, Lars C Pedersen, Thomas W Kirby, Eugene F DeRose, Robert E London
Aprataxin and PNKP-like factor (APLF) is a DNA repair factor containing a forkhead-associated (FHA) domain that supports binding to the phosphorylated FHA domain binding motifs (FBMs) in XRCC1 and XRCC4. We have characterized the interaction of the APLF FHA domain with phosphorylated XRCC1 peptides using crystallographic, NMR, and fluorescence polarization studies. The FHA-FBM interactions exhibit significant pH dependence in the physiological range as a consequence of the atypically high pK values of the phosphoserine and phosphothreonine residues and the preference for a dianionic charge state of FHA-bound pThr...
October 20, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29053386/promoting-health-from-the-pulpit-a-process-evaluation-of-hiv-sermons-to-reduce-hiv-stigma-and-promote-testing-in-african-american-and-latino-churches
#5
Denise D Payán, Karen R Flórez, Laura M Bogart, David E Kanouse, Michael A Mata, Clyde W Oden, Kathryn P Derose
Embedding health messages into sermons is a potentially valuable strategy to address HIV and other health disparities in churches that predominantly serve racial and ethnic minorities. This study explores implementation of an HIV sermon as part of a multi-component intervention in three churches (Latino Catholic, Latino Pentecostal, and African American Baptist) in high HIV prevalence areas of Los Angeles County, California. Clergy were given an HIV sermon guide that included local public health data, stigma reduction cues, HIV testing messages, and a sample sermon...
October 20, 2017: Health Communication
https://www.readbyqxmd.com/read/29041445/athermal-silicon-optical-add-drop-multiplexers-based-on-thermo-optic-coefficient-tuning-of-sol-gel-material
#6
Soha Namnabat, Kyung-Jo Kim, Adam Jones, Roland Himmelhuber, Christopher T DeRose, Douglas C Trotter, Andrew L Starbuck, Andrew Pomerene, Anthony L Lentine, Robert A Norwood
Silicon photonics has gained interest for its potential to provide higher efficiency, bandwidth and reduced power consumption compared to electrical interconnects in datacenters and high performance computing environments. However, it is well known that silicon photonic devices suffer from temperature fluctuations due to silicon's high thermo-optic coefficient and therefore, temperature control in many applications is required. Here we present an athermal optical add-drop multiplexer fabricated from ring resonators...
September 4, 2017: Optics Express
https://www.readbyqxmd.com/read/28983433/city-of-los-angeles-neighborhood-parks-research-findings-and-policy-implications-2003-2015
#7
Deborah A Cohen, Kathryn Pitkin Derose, Bing Han, Stephanie Williamson, Terry Marsh, Laura Raaen
This study summarizes more than a decade of research on how well neighborhood parks in Los Angeles support physical activity. Between 2003 and 2015, researchers at the RAND Corporation studied 83 parks in the city of Los Angeles, conducting thousands of observations and fielding nearly 28,000 surveys of park users and local residents. About half of all residents said that they used their neighborhood parks, most of them routinely. Parks are also the top venue that people choose for engaging in routine exercise...
January 2017: Rand Health Quarterly
https://www.readbyqxmd.com/read/28945177/prevalence-and-predictors-of-mental-health-programming-among-u-s-religious-congregations
#8
Eunice C Wong, Brad R Fulton, Kathryn P Derose
OBJECTIVE: This study assessed the prevalence of and factors associated with congregation-based programming in support of people with mental illness. METHODS: To estimate the proportion of congregations that provide mental health programming, this study reports analyses of survey responses from the 2012 National Congregations Study, a nationally representative survey of religious congregations in the United States (N=1,327). The analysis used multivariate logistic regression to identify congregational characteristics associated with the provision of mental health programming...
September 15, 2017: Psychiatric Services: a Journal of the American Psychiatric Association
https://www.readbyqxmd.com/read/28892625/platinum-binds-proteins-in-the-endoplasmic-reticulum-of-s-cerevisiae-and-induces-endoplasmic-reticulum-stress
#9
Rachael M Cunningham, Victoria J DeRose
Pt(II)-based anticancer drugs are widely used in the treatment of a variety of cancers, but their clinical efficacy is hindered by undesirable side effects and resistance. While much research has focused on Pt(II) drug interactions with DNA, there is increasing interest in proteins as alternative targets and contributors to cytotoxic and resistance mechanisms. Here, we describe a chemical proteomic method for isolation and identification of cellular protein targets of platinum compounds using Pt(II) reagents that have been modified for participation in the 1,3 dipolar cycloaddition "click" reaction...
November 17, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28865981/randomized-clinical-trial-of-negative-pressure-wound-therapy-for-high-risk-groin-wounds-in-lower-extremity-revascularization
#10
Kevin Lee, Patrick B Murphy, Matthew V Ingves, Audra Duncan, Guy DeRose, Luc Dubois, Thomas L Forbes, Adam Power
OBJECTIVE: The surgical site infection (SSI) rate in vascular surgery after groin incision for lower extremity revascularization can lead to significant morbidity and mortality. This trial was designed to study the effect of negative pressure wound therapy (NPWT) on SSI in closed groin wounds after lower extremity revascularization in patients at high risk for SSI. METHODS: A single-center, randomized, controlled trial was performed at an academic tertiary medical center...
August 30, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28858567/effect-of-telemedicine-education-and-telemonitoring-on-cpap-adherence-the-tele-osa-randomized-trial
#11
Dennis Hwang, Jeremiah W Chang, Adam V Benjafield, Maureen E Crocker, Colleen Kelly, Kendra A Becker, Joseph B Kim, Rosa R Woodrum, Joanne Liang, Stephen F Derose
Rationale- Automated telemedicine interventions could potentially improve adherence to continuous positive airway pressure therapy (CPAP). Objective-Examining the effects of telemedicine-delivered obstructive sleep apnea (OSA) education and CPAP telemonitoring with automated patient feedback messaging on CPAP adherence. Methods-This 4-arm, randomized, factorial-design clinical trial enrolled 1455 patients (51.0% women, age 49.1±12.5 years) referred for suspected OSA. 956 underwent home sleep apnea testing and 556 were prescribed CPAP...
August 31, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28811321/identification-of-drivers-for-the-metamorphic-transition-of-hiv-1-reverse-transcriptase
#12
Xunhai Zheng, Geoffrey A Mueller, Kyungmin Kim, Lalith Perera, Eugene F DeRose, Robert E London
Recent structural characterizations of the p51 and p66 monomers have established an important starting point for understanding the maturation pathway of the human immunodeficiency virus (HIV)-1 reverse transcriptase p66/p51 heterodimer. This process requires a metamorphic transition of the polymerase domain leading to formation of a p66/p66' homodimer that exists as a structural heterodimer. To better understand the drivers for this metamorphic transition, we have performed NMR studies of (15)N-labeled RT216 - a construct that includes the fingers and most of the palm domains...
September 24, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28807577/a-comparison-of-inflammatory-responses-between-robotically-enhanced-coronary-artery-bypass-grafting-and-conventional-coronary-artery-bypass-grafting-implications-for-hybrid-revascularization
#13
Galina Leyvi, Kumar Vivek, Sankalp Sehgal, Adrienne Warrick, Kea Alexa Moncada, Nancy Shilian, Jonathan D Leff, Robert E Michler, Joseph J DeRose
OBJECTIVE: The inflammatory response elicited by robotically enhanced coronary artery bypass grafting (r-CABG) has not been well described. When r-CABG is performed as part of hybrid coronary revascularization, the inflammatory milieu and the timing of percutaneous coronary intervention may affect the stent patency negatively in the short and long term. The goal of this study was to describe the extent and time course of cytokine release after r-CABG compared with conventional CABG (c-CABG) and to elucidate the optimal timing for r-CABG in the setting of hybrid coronary revascularization for a future study...
April 26, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28798556/a-metabolomic-geographic-and-seasonal-analysis-of-the-contribution-of-pollen-derived-adenosine-to-allergic-sensitization
#14
Geoffrey A Mueller, Peter M Thompson, Eugene F DeRose, Thomas M O'Connell, Robert E London
BACKGROUND: Studies on ragweed and birch pollen extracts suggested that the adenosine content is an important factor in allergic sensitization. However, exposure levels from other pollens and considerations of geographic and seasonal factors have not been evaluated. OBJECTIVE: This study compared the metabolite profile of pollen species important for allergic disease, specifically measured the adenosine content, and evaluated exposure to pollen-derived adenosine...
December 2016: Metabolomics: Official Journal of the Metabolomic Society
https://www.readbyqxmd.com/read/28766937/a-structural-basis-for-biguanide-activity
#15
Scott A Gabel, Michael R Duff, Lars C Pedersen, Eugene F DeRose, Juno M Krahn, Elizabeth E Howell, Robert E London
Metformin is the most commonly prescribed treatment for type II diabetes and related disorders; however, molecular insights into its mode(s) of action have been limited by an absence of structural data. Structural considerations along with a growing body of literature demonstrating its effects on one-carbon metabolism suggest the possibility of folate mimicry and anti-folate activity. Motivated by the growing recognition that anti-diabetic biguanides may act directly upon the gut microbiome, we have determined structures of the complexes formed between the anti-diabetic biguanides (phenformin, buformin, and metformin) and Escherichia coli dihydrofolate reductase (ecDHFR) based on nuclear magnetic resonance, crystallographic, and molecular modeling studies...
September 12, 2017: Biochemistry
https://www.readbyqxmd.com/read/28742870/factors-contributing-to-food-insecurity-among-women-living-with-hiv-in-the-dominican-republic-a-qualitative-study
#16
Kathryn P Derose, Denise D Payán, María Altagracia Fulcar, Sergio Terrero, Ramón Acevedo, Hugo Farías, Kartika Palar
BACKGROUND: Food insecurity contributes to poor health outcomes among people living with HIV. In Latin America and the Caribbean, structural factors such as poverty, stigma, and inequality disproportionately affect women and may fuel both the HIV epidemic and food insecurity. METHODS: We examined factors contributing to food insecurity among women living with HIV (WLHIV) in the Dominican Republic (DR). Data collection included in-depth, semi-structured interviews in 2013 with 30 WLHIV with indications of food insecurity who resided in urban or peri-urban areas and were recruited from local HIV clinics...
2017: PloS One
https://www.readbyqxmd.com/read/28681631/severe-food-insecurity-is-associated-with-overweight-and-increased-body-fat-among-people-living-with-hiv-in-the-dominican-republic
#17
Kathryn P Derose, Israel Ríos-Castillo, María Altagracia Fulcar, Denise D Payán, Kartika Palar, Lisbeth Escala, Hugo Farías, Homero Martínez
Food insecurity is an important risk factor for overweight and obesity among low-income populations in high income countries, but has not been well-studied among people living with HIV (PLHIV), particularly in resource-poor settings. To explore the association between food insecurity and overweight and obesity among PLHIV in the Dominican Republic, we conducted a cross-sectional study of 160 HIV-infected adults between March-December 2012 in four geographically-dispersed health centers (Santo Domingo, Puerto Plata, San Juan, and Higuey)...
July 6, 2017: AIDS Care
https://www.readbyqxmd.com/read/28645058/promoting-physical-activity-in-high-poverty-neighborhood-parks-a-cluster-randomized-controlled-trial
#18
Deborah A Cohen, Bing Han, Kathryn P Derose, Stephanie Williamson, Terry Marsh, Laura Raaen, Thomas L McKenzie
Although physical activity can help mitigate or prevent multiple chronic diseases, most people in the U.S., especially high-poverty minority groups, engage in insufficient levels of physical activity. To test ways to promote more physical activity in high-poverty area public parks we conducted a randomized controlled intervention trial. After completing baseline measures of park-based physical activity using systematic direct observation three times/day each month for six months and assessing preferences for park programming among 1445 residents living within 1 mile of study parks, we randomized 48 parks in high poverty neighborhoods in the City of Los Angeles, California during 2013-2014 to four study arms: 1) free physical activity classes over a 6-month period, 2) a frequent user program where participants could win prizes based upon the number of visits they made to the park, 3) both the programs, and 4) neither one (control condition)...
August 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28549028/hybrid-coronary-revascularization-has-improved-short-term-outcomes-but-worse-mid-term-reintervention-rates-compared-to-cabg-a-propensity-matched-analysis
#19
Yu Xia, Abraham N Katz, Stephen J Forest, Robert T Pyo, Mark A Greenberg, Joseph J DeRose
OBJECTIVE: We evaluated short-term outcomes and mid-term survival and reintervention of hybrid coronary revascularization versus conventional coronary artery bypass grafting using a propensity score matched cohort. METHODS: We conducted a retrospective review of patients undergoing surgery for multivessel coronary artery disease from 2007 to 2015 at a single institution. Patients were propensity matched 1:1 to receiving hybrid coronary revascularization or conventional bypass grafting by multivariate logistic regression on preoperative characteristics...
May 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/28508707/maternal-union-instability-and-childhood-mortality-risk-in-the-global-south-2010-14
#20
Laurie F DeRose, Andrés Salazar-Arango, Paúl Corcuera García, Montserrat Gas-Aixendri, Reynaldo Rivera
Efforts to improve child survival in lower-income countries typically focus on fundamental factors such as economic resources and infrastructure provision, even though research from post-industrial countries confirms that family instability has important health consequences. We tested the association between maternal union instability and children's mortality risk in Africa, Latin America and the Caribbean, and Asia using children's actual experience of mortality (discrete-time probit hazard models) as well as their experience of untreated morbidity (probit regression)...
May 16, 2017: Population Studies
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