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Evan rosen

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https://www.readbyqxmd.com/read/28332270/changes-in-elevated-cholesterol-in-the-era-of-tenofovir-in-south-africa-risk-factors-clinical-management-and-outcomes
#1
L Jamieson, D Evans, A T Brennan, F Moyo, D Spencer, K Mahomed, M Maskew, L Long, S Rosen, M P Fox
OBJECTIVES: Antiretroviral therapy (ART) has been associated with unfavourable lipid profile changes and increased risk of cardiovascular disease (CVD). With a growing population on ART in South Africa, there has been concern about the increase in noncommunicable diseases such as CVD. We determined risk factors associated with increased total cholesterol (TC) in a large cohort on ART and describe the clinical management thereof. METHODS: We conducted an observational cohort study of ART-naïve adults initiating standard first-line ART in a large urban clinic in Johannesburg, South Africa...
March 23, 2017: HIV Medicine
https://www.readbyqxmd.com/read/28289709/imaging-mass-spectrometry-demonstrates-age-related-decline-in-human-adipose-plasticity
#2
Christelle Guillermier, Pouneh K Fazeli, Soomin Kim, Mingyue Lun, Jonah P Zuflacht, Jessica Milian, Hang Lee, Hugues Francois-Saint-Cyr, Francois Horreard, David Larson, Evan D Rosen, Richard T Lee, Claude P Lechene, Matthew L Steinhauser
Quantification of stable isotope tracers has revealed the dynamic state of living tissues. A new form of imaging mass spectrometry quantifies isotope ratios in domains much smaller than a cubic micron, enabling measurement of cell turnover and metabolism with stable isotope tracers at the single-cell level with a methodology we refer to as multi-isotope imaging mass spectrometry. In a first-in-human study, we utilize stable isotope tracers of DNA synthesis and de novo lipogenesis to prospectively measure cell birth and adipocyte lipid turnover...
March 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28286277/extent-of-resection-visual-and-endocrinological-outcomes-for-endoscopic-endonasal-surgery-for-recurrent-pituitary-adenomas
#3
Hyunwoo Do, Varun R Kshettry, Alan Siu, Irina Belinsky, Christopher J Farrell, Gurston Nyquist, Marc Rosen, James J Evans
OBJECTIVE: To assess outcomes after endoscopic endonasal surgery for recurrent or residual pituitary adenomas. METHODS: We retrospectively analyzed 61 patients from 2009 - 2016 that underwent endoscopic endonasal surgery for recurrent or residual pituitary adenomas after prior microscopic or endoscopic transphenoidal operation. RESULTS: Prior surgical approach was endoscopic endonasal in 55.7% and microscopic in 44.2%. The mean preoperative maximal tumor diameter was 2...
March 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28249647/a-clinicopathologic-study-on-ss18-fusion-positive-head-and-neck-synovial-sarcomas
#4
Adepitan A Owosho, Cherry L Estilo, Evan B Rosen, SaeHee K Yom, Joseph M Huryn, Cristina R Antonescu
OBJECTIVE: To determine clinicopathologic factors on survival in patients with head and neck synovial sarcoma. PATIENTS AND METHODS: We retrospectively identified patients with molecularly confirmed synovial sarcomas of the head and neck (SS-HN), either by the presence of SS18-SSX fusion transcript by RT-PCR or SS18 gene rearrangement by FISH, who were managed at our institution over a 20-year period (1996-2015). Kaplan-Meier survival analysis and log-rank test were performed to evaluate variables related to disease specific survival (DSS)...
March 2017: Oral Oncology
https://www.readbyqxmd.com/read/28166221/a-molecular-census-of-arcuate-hypothalamus-and-median-eminence-cell-types
#5
John N Campbell, Evan Z Macosko, Henning Fenselau, Tune H Pers, Anna Lyubetskaya, Danielle Tenen, Melissa Goldman, Anne M J Verstegen, Jon M Resch, Steven A McCarroll, Evan D Rosen, Bradford B Lowell, Linus T Tsai
The hypothalamic arcuate-median eminence complex (Arc-ME) controls energy balance, fertility and growth through molecularly distinct cell types, many of which remain unknown. To catalog cell types in an unbiased way, we profiled gene expression in 20,921 individual cells in and around the adult mouse Arc-ME using Drop-seq. We identify 50 transcriptionally distinct Arc-ME cell populations, including a rare tanycyte population at the Arc-ME diffusion barrier, a new leptin-sensing neuron population, multiple agouti-related peptide (AgRP) and pro-opiomelanocortin (POMC) subtypes, and an orexigenic somatostatin neuron population...
March 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/28122230/simultaneous-transcriptional-and-epigenomic-profiling-from-specific-cell-types-within-heterogeneous-tissues-in%C3%A2-vivo
#6
Hyun Cheol Roh, Linus T-Y Tsai, Anna Lyubetskaya, Danielle Tenen, Manju Kumari, Evan D Rosen
Epigenomic mechanisms direct distinct gene expression programs for different cell types. Various in vivo tissues have been subjected to epigenomic analysis; however, these studies have been limited by cellular heterogeneity, resulting in composite gene expression and epigenomic profiles. Here, we introduce "NuTRAP," a transgenic mouse that allows simultaneous isolation of cell-type-specific translating mRNA and chromatin from complex tissues. Using NuTRAP, we successfully characterize gene expression and epigenomic states of various adipocyte populations in vivo, revealing significant differences compared to either whole adipose tissue or in vitro adipocyte cell lines...
January 24, 2017: Cell Reports
https://www.readbyqxmd.com/read/28024723/the-prevalence-and-risk-factors-associated-with-osteoradionecrosis-of-the-jaw-in-oral-and-oropharyngeal-cancer-patients-treated-with-intensity-modulated-radiation-therapy-imrt-the-memorial-sloan-kettering-cancer-center-experience
#7
Adepitan A Owosho, C Jillian Tsai, Ryan S Lee, Haley Freymiller, Arvin Kadempour, Spyridon Varthis, Adi Z Sax, Evan B Rosen, SaeHee K Yom, Joseph Randazzo, Esther Drill, Elyn Riedel, Snehal Patel, Nancy Y Lee, Joseph M Huryn, Cherry L Estilo
OBJECTIVE: To determine the prevalence and correlation of various risk factors [radiation dose, periodontal status, alcohol and smoking] to the development of osteoradionecrosis (ORN). PATIENTS AND METHODS: The records of 1023 patients treated with IMRT for oral cavity cancer (OCC) and oropharyngeal cancer (OPC) between 2004 and 2013 were retrospectively reviewed to identify patients who developed ORN. Fisher exact tests were used to analyze patient characteristics between ORN patients with OCC and OPC...
January 2017: Oral Oncology
https://www.readbyqxmd.com/read/27942005/treatment-outcomes-and-costs-of-providing-antiretroviral-therapy-at-a-primary-health-clinic-versus-a-hospital-based-hiv-clinic-in-south-africa
#8
Lawrence C Long, Sydney B Rosen, Alana Brennan, Faith Moyo, Celeste Sauls, Denise Evans, Shookdev L Modi, Ian Sanne, Matthew P Fox
BACKGROUND: In 2010 South Africa revised its HIV treatment guidelines to allow the initiation and management of patients on antiretroviral therapy (ART) by nurses, rather than solely doctors, under a program called NIMART (Nurse Initiated and Managed Antiretroviral Therapy). We compared the outcomes and costs of NIMART between the two major public sector HIV treatment delivery models in use in South Africa today, primary health clinics and hospital-based HIV clinics. METHODS AND FINDINGS: The study was conducted at one hospital-based outpatient HIV clinic and one primary health clinic (PHC) in Gauteng Province...
2016: PloS One
https://www.readbyqxmd.com/read/27903119/the-learning-curve-in-endoscopic-endonasal-resection-of-craniopharyngiomas
#9
Varun R Kshettry, Hyunwoo Do, Khaled Elshazly, Christopher J Farrell, Gurston Nyquist, Marc Rosen, James J Evans
OBJECTIVE There is a paucity of literature regarding the learning curve associated with performing endoscopic endonasal cranial base surgery. The purpose of this study was to determine to what extent a learning curve might exist for endoscopic endonasal resection in cases of craniopharyngiomas. METHODS A retrospective review was performed for all endoscopic endonasal craniopharyngioma resections performed at Thomas Jefferson University from 2005 to 2015. To assess for a learning curve effect, patients were divided into an early cohort (2005-2009, n = 20) and a late cohort (2010-2015, n = 23)...
December 2016: Neurosurgical Focus
https://www.readbyqxmd.com/read/27857874/minimizing-septectomy-for-endoscopic-transsphenoidal-approaches-to-the-sellar-and-suprasellar-regions-a-cadaveric-morphometric-study
#10
Hermes G Garcia, Marc Otten, Marc Pyfer, Saurabh J Singhal, Alfred Marc Iloreta, Varun R Kshettry, Christopher J Farrell, Gurston Nyquist, Marc Rosen, James J Evans
The purpose of this study was to evaluate the effect of posterior septectomy size on surgical exposure and surgical freedom during the endoscopic transsphenoidal approach to the sella and parasellar region. Dissections were performed on 10 embalmed cadaver heads. Dissections started with wide bilateral sphenoidotomies, lateralization of middle turbinates, and a 5-mm posterior septectomy. The posterior septectomy was increased in 5-mm increments to a maximum of 35 mm, followed by bilateral middle turbinectomies...
December 2016: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/27853960/phase-ii-study-of-tivozanib-an-oral-vegfr-inhibitor-in-patients-with-recurrent-glioblastoma
#11
Jayashree Kalpathy-Cramer, Vyshak Chandra, Xiao Da, Yangming Ou, Kyrre E Emblem, Alona Muzikansky, Xuezhu Cai, Linda Douw, John G Evans, Jorg Dietrich, Andrew S Chi, Patrick Y Wen, Stephen Stufflebeam, Bruce Rosen, Dan G Duda, Rakesh K Jain, Tracy T Batchelor, Elizabeth R Gerstner
Targeting tumor angiogenesis is a potential therapeutic strategy for glioblastoma because of its high vascularization. Tivozanib is an oral pan-VEGF receptor tyrosine kinase inhibitor that hits a central pathway in glioblastoma angiogenesis. We conducted a phase II study to test the effectiveness of tivozanib in patients with recurrent glioblastoma. Ten adult patients were enrolled and treated with tivozanib 1.5 mg daily, 3 weeks on/1 week off in 28-day cycles. Brain MRI and blood biomarkers of angiogenesis were performed at baseline, within 24-72 h of treatment initiation, and monthly thereafter...
November 16, 2016: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/27812140/early-outcomes-of-decentralized-care-for-rifampicin-resistant-tuberculosis-in-johannesburg-south-africa-an-observational-cohort-study
#12
Rebecca Berhanu, Kathryn Schnippel, Erika Mohr, Kamban Hirasen, Denise Evans, Sydney Rosen, Ian Sanne
OBJECTIVE: We describe baseline characteristics, time to treatment initiation and interim patient outcomes at a decentralized, outpatient treatment site for rifampicin-resistant TB (RR-TB). METHODS: Prospective observational cohort study of RR-TB patients from March 2013 until December 2014. Study subjects were followed until completion of the intensive phase of treatment (6 months), transfer out, or a final outcome (loss from treatment (LFT) or death). RESULTS: 214 patients with RR-TB were enrolled in the study...
2016: PloS One
https://www.readbyqxmd.com/read/27798041/economic-evaluation-of-a-shortened-standardised-treatment-regimen-of-antituberculosis-drugs-for-patients-with-multidrug-resistant-tuberculosis-stream-study-protocol
#13
Elvis Gama, Jason Madan, Ivor Langley, Mamo Girma, Denise Evans, Sydney Rosen, S Bertel Squire
INTRODUCTION: Multidrug-resistant tuberculosis (MDR-TB) poses a serious financial challenge to health systems and patients. The current treatment for patients with MDR-TB takes up to 24 months to complete. Evidence for a shorter regimen which differs from the standard WHO recommended MDR-TB regimen and typically lasts between 9 and 12 months has been reported from Bangladesh. This evaluation aims to assess the economic impact of a shortened regimen on patients and health systems. This evaluation is innovative as it combines patient and health system costs, as well as operational modelling in assessing the impact...
October 17, 2016: BMJ Open
https://www.readbyqxmd.com/read/27753066/diagnosis-of-elder-abuse-in-u-s-emergency-departments
#14
Christopher S Evans, Katherine M Hunold, Tony Rosen, Timothy F Platts-Mills
OBJECTIVES: To estimate the proportion of visits to U.S. emergency departments (EDs) in which a diagnosis of elder abuse is reached using two nationally representative datasets. DESIGN: Retrospective cross-sectional analysis. SETTING: U.S. ED visits recorded in the 2012 Nationwide Emergency Department Sample (NEDS) or the 2011 National Hospital Ambulatory Medical Care Survey (NHAMCS). PARTICIPANTS: All ED visits of individuals aged 60 and older...
January 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/27749844/prospective-functional-classification-of-all-possible-missense-variants-in-pparg
#15
Amit R Majithia, Ben Tsuda, Maura Agostini, Keerthana Gnanapradeepan, Robert Rice, Gina Peloso, Kashyap A Patel, Xiaolan Zhang, Marjoleine F Broekema, Nick Patterson, Marc Duby, Ted Sharpe, Eric Kalkhoven, Evan D Rosen, Inês Barroso, Sian Ellard, Sekar Kathiresan, Stephen O'Rahilly, Krishna Chatterjee, Jose C Florez, Tarjei Mikkelsen, David B Savage, David Altshuler
Clinical exome sequencing routinely identifies missense variants in disease-related genes, but functional characterization is rarely undertaken, leading to diagnostic uncertainty. For example, mutations in PPARG cause Mendelian lipodystrophy and increase risk of type 2 diabetes (T2D). Although approximately 1 in 500 people harbor missense variants in PPARG, most are of unknown consequence. To prospectively characterize PPARγ variants, we used highly parallel oligonucleotide synthesis to construct a library encoding all 9,595 possible single-amino acid substitutions...
December 2016: Nature Genetics
https://www.readbyqxmd.com/read/27725021/outcomes-of-treatment-of-drug-susceptible-tuberculosis-at-public-sector-primary-healthcare-clinics-in-johannesburg-south-africa-a-retrospective-cohort-study
#16
E P Budgell, D Evans, K Schnippel, P Ive, L Long, S Rosen
BACKGROUND: Despite the large number of tuberculosis (TB) patients treated in South Africa (SA), there are few descriptions in the published literature of drug-susceptible TB patient characteristics, mode of diagnosis or treatment outcomes in routine public sector treatment programmes. OBJECTIVE: To enhance the evidence base for public sector TB treatment service delivery, we reported the characteristics of and outcomes for a retrospective cohort of adult TB patients at public sector clinics in the Johannesburg Metropolitan Municipality (JHB), SA...
September 5, 2016: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/27546484/the-extended-nasoseptal-flap-for-coverage-of-large-cranial-base-defects
#17
Ethan Bassett, Alexander Farag, Alfred Iloreta, Christopher Farrell, James Evans, Marc Rosen, Ameet Singh, Gurston Nyquist
BACKGROUND: The nasoseptal flap (NSF) is commonly used to repair skull base defects via a transnasal endoscopic approach. The original description of the technique includes 2 parallel incisions that follow the sagittal plane of the septum. We describe a novel modification to the traditional NSF that allows coverage along the posterior wall of the frontal sinus. METHODS: In addition to the 2 sagittal incisions, a third incision is made between these coursing along the maxillary crest from the posterior edge to the midportion of the flap...
August 22, 2016: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/27435961/small-molecule-proteostasis-regulators-that-reprogram-the-er-to-reduce-extracellular-protein-aggregation
#18
Lars Plate, Christina B Cooley, John J Chen, Ryan J Paxman, Ciara M Gallagher, Franck Madoux, Joseph C Genereux, Wesley Dobbs, Dan Garza, Timothy P Spicer, Louis Scampavia, Steven J Brown, Hugh Rosen, Evan T Powers, Peter Walter, Peter Hodder, R Luke Wiseman, Jeffery W Kelly
Imbalances in endoplasmic reticulum (ER) proteostasis are associated with etiologically-diverse degenerative diseases linked to excessive extracellular protein misfolding and aggregation. Reprogramming of the ER proteostasis environment through genetic activation of the Unfolded Protein Response (UPR)-associated transcription factor ATF6 attenuates secretion and extracellular aggregation of amyloidogenic proteins. Here, we employed a screening approach that included complementary arm-specific UPR reporters and medium-throughput transcriptional profiling to identify non-toxic small molecules that phenocopy the ATF6-mediated reprogramming of the ER proteostasis environment...
2016: ELife
https://www.readbyqxmd.com/read/27400129/irf3-promotes-adipose-inflammation-and-insulin-resistance-and-represses-browning
#19
Manju Kumari, Xun Wang, Louise Lantier, Anna Lyubetskaya, Jun Eguchi, Sona Kang, Danielle Tenen, Hyun Cheol Roh, Xingxing Kong, Lawrence Kazak, Rasheed Ahmad, Evan D Rosen
The chronic inflammatory state that accompanies obesity is a major contributor to insulin resistance and other dysfunctional adaptations in adipose tissue. Cellular and secreted factors promote the inflammatory milieu of obesity, but the transcriptional pathways that drive these processes are not well described. Although the canonical inflammatory transcription factor NF-κB is considered to be the major driver of adipocyte inflammation, members of the interferon regulatory factor (IRF) family may also play a role in this process...
August 1, 2016: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/27280164/synthetic-organic-electrochemistry-an-enabling-and-innately-sustainable-method
#20
REVIEW
Evan J Horn, Brandon R Rosen, Phil S Baran
While preparative electrolysis of organic molecules has been an active area of research over the past century, modern synthetic chemists have generally been reluctant to adopt this technology. In fact, electrochemical methods possess many benefits over traditional reagent-based transformations, such as high functional group tolerance, mild conditions, and innate scalability and sustainability. In this Outlook we highlight illustrative examples of electrochemical reactions in the context of the synthesis of complex molecules, showcasing the intrinsic benefits of electrochemical reactions versus traditional reagent-based approaches...
May 25, 2016: ACS Central Science
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