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Robert Siegel

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https://www.readbyqxmd.com/read/28539475/the-brain-microenvironment-mediates-resistance-in-luminal-breast-cancer-to-pi3k-inhibition-through-her3-activation
#1
David P Kodack, Vasileios Askoxylakis, Gino B Ferraro, Qing Sheng, Mark Badeaux, Shom Goel, Xiaolong Qi, Ram Shankaraiah, Z Alexander Cao, Rakesh R Ramjiawan, Divya Bezwada, Bhushankumar Patel, Yongchul Song, Carlotta Costa, Kamila Naxerova, Christina S F Wong, Jonas Kloepper, Rita Das, Angela Tam, Jantima Tanboon, Dan G Duda, C Ryan Miller, Marni B Siegel, Carey K Anders, Melinda Sanders, Monica V Estrada, Robert Schlegel, Carlos L Arteaga, Elena Brachtel, Alan Huang, Dai Fukumura, Jeffrey A Engelman, Rakesh K Jain
Although targeted therapies are often effective systemically, they fail to adequately control brain metastases. In preclinical models of breast cancer that faithfully recapitulate the disparate clinical responses in these microenvironments, we observed that brain metastases evade phosphatidylinositide 3-kinase (PI3K) inhibition despite drug accumulation in the brain lesions. In comparison to extracranial disease, we observed increased HER3 expression and phosphorylation in brain lesions. HER3 blockade overcame the resistance of HER2-amplified and/or PIK3CA-mutant breast cancer brain metastases to PI3K inhibitors, resulting in marked tumor growth delay and improvement in mouse survival...
May 24, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28538004/comparison-of-contact-allergens-in-bar-soaps-and-liquid-body-washes
#2
Julia A Siegel, Jessica S Mounessa, Robert P Dellavalle, Cory A Dunnick
No abstract text is available yet for this article.
May 23, 2017: Dermatitis
https://www.readbyqxmd.com/read/28532759/5-fluorouracil-for-actinic-keratosis-treatment-and-chemoprevention-a-randomized-controlled-trial
#3
Joanna L Walker, Julia A Siegel, Moniyka Sachar, Hyemin Pomerantz, Suephy C Chen, Susan M Swetter, Robert P Dellavalle, George P Stricklin, Abrar A Qureshi, John J DiGiovanna, Martin A Weinstock
No abstract text is available yet for this article.
June 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28486691/combined-kinase-inhibitors-of-mek1-2-and-either-pi3k-or-pdgfr-are-efficacious-in-intracranial-triple-negative-breast-cancer
#4
Amanda E D Van Swearingen, Maria J Sambade, Marni B Siegel, Shivani Sud, Robert S McNeill, Samantha M Bevill, Xin Chen, Ryan E Bash, Louisa Mounsey, Brian T Golitz, Charlene Santos, Allison Deal, Joel S Parker, Naim Rashid, C Ryan Miller, Gary L Johnson, Carey K Anders
Background: Triple-negative breast cancer (TNBC), lacking expression of hormone and human epidermal growth factor receptor 2 receptors, is an aggressive subtype that frequently metastasizes to the brain and has no FDA-approved systemic therapies. Previous literature demonstrates mitogen-activated protein kinase kinase (MEK) pathway activation in TNBC brain metastases. Thus, we aimed to discover rational combinatorial therapies with MEK inhibition, hypothesizing that co-inhibition using clinically available brain-penetrant inhibitors would improve survival in preclinical models of TNBC brain metastases...
May 9, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28481970/foldit-standalone-a-video-game-derived-protein-structure-manipulation-interface-using-rosetta
#5
Robert Kleffner, Jeff Flatten, Andrew Leaver-Fay, David Baker, Justin B Siegel, Firas Khatib, Seth Cooper
Summary: Foldit Standalone is an interactive graphical interface to the Rosetta molecular modeling package. In contrast to most command-line or batch interactions with Rosetta, Foldit Standalone is designed to allow easy, real-time, direct manipulation of protein structures, while also giving access to the extensive power of Rosetta computations. Derived from the user interface of the scientific discovery game Foldit (itself based on Rosetta), Foldit Standalone has added more advanced features and removed the competitive game elements...
May 8, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28438555/amygdala-activity-associated-with-social-choice-in-mice
#6
Takuma Mihara, Kobina Mensah-Brown, Rosanna Sobota, Robert Lin, Robert Featherstone, Steven J Siegel
Studies suggest that the amygdala is a key region for regulation of anxiety, fear and social function. Therefore, dysfunction of the amygdala has been proposed as a potential mechanism for negative symptoms in schizophrenia. This may be due to NMDA receptor-mediated hypofunction, which is thought to be related to the pathogenesis of schizophrenia. In this study, electroencephalographic amygdala activity was assessed in mice during the three-chamber social test. This activity was also evaluated following exposure to the NMDA receptor antagonist ketamine...
April 21, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28429289/the-nature-and-consequences-of-cognitive-deficits-among-tobacco-smokers-with-hiv-a-comparison-to-tobacco-smokers-without-hiv
#7
Joseph D Harrison, Jessica A Dochney, Sonja Blazekovic, Frank Leone, David Metzger, Ian Frank, Robert Gross, Anita Hole, Karam Mounzer, Steven Siegel, Robert A Schnoll, Rebecca L Ashare
HIV-infected smokers lose more years of life to tobacco-related disease than HIV. Since neurocognitive deficits are common among those with HIV and are associated with smoking persistence, these deficits may be a unique barrier to smoking cessation among HIV-infected smokers. Documenting unique differences in and correlates of cognition among HIV-infected smokers is a critical step towards developing a population-specific tobacco cessation treatment. We compared neurocognitive function between HIV-infected (n = 103) and HIV-uninfected smokers (n = 70), accounting for demographic and smoking-related variables...
April 20, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28416341/the-role-of-cannabinoids-in-dermatology
#8
EDITORIAL
Jessica S Mounessa, Julia A Siegel, Cory A Dunnick, Robert P Dellavalle
No abstract text is available yet for this article.
April 14, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28398584/genomic-profiles-of-low-grade-murine-gliomas-evolve-during-progression-to-glioblastoma
#9
Mark Vitucci, David M Irvin, Robert S McNeill, Ralf S Schmid, Jeremy M Simon, Harshil D Dhruv, Marni B Siegel, Andrea M Werneke, Ryan E Bash, Seungchan Kim, Michael E Berens, C Ryan Miller
Background: Gliomas are diverse neoplasms with multiple molecular subtypes. How tumor-initiating mutations relate to molecular subtypes as these tumors evolve during malignant progression remains unclear. Methods: We used genetically engineered mouse models, histopathology, genetic lineage tracing, expression profiling, and copy number analyses to examine how genomic tumor diversity evolves during the course of malignant progression from low- to high-grade disease...
April 7, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28379424/combination-therapy-with-potent-pi3k-and-mapk-inhibitors-overcomes-adaptive-kinome-resistance-to-single-agents-in-preclinical-models-of-glioblastoma
#10
Robert S McNeill, Demitra A Canoutas, Timothy J Stuhlmiller, Harshil D Dhruv, David M Irvin, Ryan E Bash, Steven P Angus, Laura E Herring, Jeremy M Simon, Kasey R Skinner, Juanita C Limas, Xin Chen, Ralf S Schmid, Marni B Siegel, Amanda E D Van Swearingen, Michael J Hadler, Erik P Sulman, Jann N Sarkaria, Carey K Anders, Lee M Graves, Michael E Berens, Gary L Johnson, C Ryan Miller
Background.: Glioblastoma (GBM) is the most common and aggressive primary brain tumor. Prognosis remains poor despite multimodal therapy. Developing alternative treatments is essential. Drugs targeting kinases within the phosphoinositide 3-kinase (PI3K) and mitogen-activated protein kinase (MAPK) effectors of receptor tyrosine kinase (RTK) signaling represent promising candidates. Methods.: We previously developed a non-germline genetically engineered mouse model of GBM in which PI3K and MAPK are activated via Pten deletion and KrasG12D in immortalized astrocytes...
March 30, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28274956/natriuretic-peptides-in-the-evaluation-and-management-of-degenerative-mitral-regurgitation-a-systematic-review
#11
REVIEW
Michael M Johl, Pankaj Malhotra, Devin W Kehl, Florian Rader, Robert J Siegel
Progression of degenerative mitral regurgitation (MR) leads to irreversible cardiac damage. Therefore, longitudinal follow up to determine the optimal timing of surgery is critical. Current data indicates that in addition to the standard of care-assessing for symptoms and signs of left ventricular (LV) decompensation with routine echocardiography-serial measurement of natriuretic peptides offers a quantitative means to identify patients who may benefit from closer supervision, if not surgery. Natriuretic peptide levels, and specifically changes from baseline, identify both symptomatic patients and others likely to develop cardiac dysfunction...
May 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28262699/gs-5734-and-its-parent-nucleoside-analog-inhibit-filo-pneumo-and-paramyxoviruses
#12
Michael K Lo, Robert Jordan, Aaron Arvey, Jawahar Sudhamsu, Punya Shrivastava-Ranjan, Anne L Hotard, Mike Flint, Laura K McMullan, Dustin Siegel, Michael O Clarke, Richard L Mackman, Hon C Hui, Michel Perron, Adrian S Ray, Tomas Cihlar, Stuart T Nichol, Christina F Spiropoulou
GS-5734 is a monophosphate prodrug of an adenosine nucleoside analog that showed therapeutic efficacy in a non-human primate model of Ebola virus infection. It has been administered under compassionate use to two Ebola patients, both of whom survived, and is currently in Phase 2 clinical development for treatment of Ebola virus disease. Here we report the antiviral activities of GS-5734 and the parent nucleoside analog across multiple virus families, providing evidence to support new indications for this compound against human viruses of significant public health concern...
March 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28249035/inactivity-sleep-in-two-wild-free-roaming-african-elephant-matriarchs-does-large-body-size-make-elephants-the-shortest-mammalian-sleepers
#13
Nadine Gravett, Adhil Bhagwandin, Robert Sutcliffe, Kelly Landen, Michael J Chase, Oleg I Lyamin, Jerome M Siegel, Paul R Manger
The current study provides details of sleep (or inactivity) in two wild, free-roaming African elephant matriarchs studied in their natural habitat with remote monitoring using an actiwatch subcutaneously implanted in the trunk, a standard elephant collar equipped with a GPS system and gyroscope, and a portable weather station. We found that these two elephants were polyphasic sleepers, had an average daily total sleep time of 2 h, mostly between 02:00 and 06:00, and displayed the shortest daily sleep time of any mammal recorded to date...
2017: PloS One
https://www.readbyqxmd.com/read/28246640/ultraflexible-nanoelectronic-probes-form-reliable-glial-scar-free-neural-integration
#14
Lan Luan, Xiaoling Wei, Zhengtuo Zhao, Jennifer J Siegel, Ojas Potnis, Catherine A Tuppen, Shengqing Lin, Shams Kazmi, Robert A Fowler, Stewart Holloway, Andrew K Dunn, Raymond A Chitwood, Chong Xie
Implanted brain electrodes construct the only means to electrically interface with individual neurons in vivo, but their recording efficacy and biocompatibility pose limitations on scientific and clinical applications. We showed that nanoelectronic thread (NET) electrodes with subcellular dimensions, ultraflexibility, and cellular surgical footprints form reliable, glial scar-free neural integration. We demonstrated that NET electrodes reliably detected and tracked individual units for months; their impedance, noise level, single-unit recording yield, and the signal amplitude remained stable during long-term implantation...
February 2017: Science Advances
https://www.readbyqxmd.com/read/28218385/timing-of-completion-lymphadenectomy-after-positive-sentinel-node-biopsy-in-patients-with-melanoma
#15
MULTICENTER STUDY
C M C Oude Ophuis, A C J van Akkooi, P Rutkowski, W E M Powell, C Robert, A Testori, B L van Leeuwen, P Siegel, A M M Eggermont, C Verhoef, D J Grünhagen
BACKGROUND: Nodal staging with sentinel node biopsy (SNB) and completion lymph node dissection (CLND) provides prognostic information to patients with melanoma and their physicians. It is not known whether the timing of CLND is associated with survival outcome and/or CLND tumour load. This study investigated whether CLND timing is associated with CLND tumour load, disease-free survival (DFS) and/or melanoma-specific survival (MSS). METHODS: A retrospective cohort of patients with SNB-positive melanoma from nine European Organisation for Research and Treatment of Cancer (EORTC) Melanoma Group centres undergoing surgery between 1993 and 2009 were examined...
May 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/28188186/nccn-guidelines-insights-bone-cancer-version-2-2017
#16
J Sybil Biermann, Warren Chow, Damon R Reed, David Lucas, Douglas R Adkins, Mark Agulnik, Robert S Benjamin, Brian Brigman, G Thomas Budd, William T Curry, Aarati Didwania, Nicola Fabbri, Francis J Hornicek, Joseph B Kuechle, Dieter Lindskog, Joel Mayerson, Sean V McGarry, Lynn Million, Carol D Morris, Sujana Movva, Richard J O'Donnell, R Lor Randall, Peter Rose, Victor M Santana, Robert L Satcher, Herbert Schwartz, Herrick J Siegel, Katherine Thornton, Victor Villalobos, Mary Anne Bergman, Jillian L Scavone
The NCCN Guidelines for Bone Cancer provide interdisciplinary recommendations for treating chordoma, chondrosarcoma, giant cell tumor of bone, Ewing sarcoma, and osteosarcoma. These NCCN Guidelines Insights summarize the NCCN Bone Cancer Panel's guideline recommendations for treating Ewing sarcoma. The data underlying these treatment recommendations are also discussed.
February 2017: Journal of the National Comprehensive Cancer Network: JNCCN
https://www.readbyqxmd.com/read/28175012/p241-defining-patient-centered-outcomes-for-ibd-an%C3%A2-international-cross-disciplinary-consensus
#17
A Kim, C Roberts, B Feagan, R Banerjee, W Bemelman, K Bodger, M Derieppe, A Dignass, R Driscoll, R Fitzpatrick, P Higgins, P Kotze, J Meissner, M O'Connor, Z-H Ran, C Siegel, H Terry, W van Deen, C van der Woude, A Weaver, S-K Yang, B Sands, S Vermeire, S Travis
No abstract text is available yet for this article.
February 1, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28170312/problem-video-gaming-among-children-enrolled-in-tertiary-weight-management-programs
#18
Sam Stubblefield, George Datto, Thao-Ly T Phan, Lloyd N Werk, Kristin Stackpole, Robert Siegel, William Stratbucker, Jared M Tucker, Amy L Christison, Jobayer Hossain, Douglas A Gentile
Prior studies show seven percent to nine percent of children demonstrate gaming behaviors that affect a child's ability to function (e.g., problem gaming), but none have examined the association between problem gaming and weight status. The objective of this study was to determine the prevalence of problem gaming among children enrolled in tertiary weight management programs. We administered a computer-based survey to a convenience sample of children aged 11-17 years enrolled in five geographically diverse pediatric weight management (PWM) programs in the COMPASS (Childhood Obesity Multi-Program Analysis and Study System) network...
February 2017: Cyberpsychology, Behavior and Social Networking
https://www.readbyqxmd.com/read/28156494/embedding-palliative-care-pc-in-a-community-based-cancer-center-benefits-and-barriers
#19
John Weems, Robert D Siegel, Teresa N Bowen, Leigh Stinnett, Jennifer Ashley
153 Background: The importance of involving PC early in the disease process of oncology patients is well documented. Decreased symptom burden, increased quality of life, and extended survival are proven outcomes; however, the provision of PC has largely been limited to the acute care setting in most institutions. Bon Secours St. Francis Health System, a community based healthcare system in Greenville, South Carolina, opened a comprehensive cancer center in late 2014. Our established inpatient PC team began seeing outpatients at the cancer center shortly after its opening...
October 9, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28145128/small-prizes-improve-food-selection-in-a-school-cafeteria-without-increasing-waste
#20
Michelle E Hudgens, Allison S Barnes, Mary Kate Lockhart, Samantha C Ellsworth, Monna Beckford, Robert M Siegel
We recently demonstrated that small prizes given for a "Power Plate" (plain fat-free milk, entrée, fruit and vegetable) can be used in an elementary school cafeteria to increase healthful food selection by over 300%. The purpose of this study was to measure changes in food waste when the Power Plate (PP) program is implemented. The PP intervention was conducted at an inner-city elementary school. Emoticons were placed next to the preferred foods and children were given a small prize if they selected the PP...
February 2017: Clinical Pediatrics
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