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https://www.readbyqxmd.com/read/28538732/cps1-maintains-pyrimidine-pools-and-dna-synthesis-in-kras-lkb1-mutant-lung-cancer-cells
#1
Jiyeon Kim, Zeping Hu, Ling Cai, Kailong Li, Eunhee Choi, Brandon Faubert, Divya Bezwada, Jaime Rodriguez-Canales, Pamela Villalobos, Yu-Fen Lin, Min Ni, Kenneth E Huffman, Luc Girard, Lauren A Byers, Keziban Unsal-Kacmaz, Christopher G Peña, John V Heymach, Els Wauters, Johan Vansteenkiste, Diego H Castrillon, Benjamin P C Chen, Ignacio Wistuba, Diether Lambrechts, Jian Xu, John D Minna, Ralph J DeBerardinis
Metabolic reprogramming by oncogenic signals promotes cancer initiation and progression. The oncogene KRAS and tumour suppressor STK11, which encodes the kinase LKB1, regulate metabolism and are frequently mutated in non-small-cell lung cancer (NSCLC). Concurrent occurrence of oncogenic KRAS and loss of LKB1 (KL) in cells specifies aggressive oncological behaviour. Here we show that human KL cells and tumours share metabolomic signatures of perturbed nitrogen handling. KL cells express the urea cycle enzyme carbamoyl phosphate synthetase-1 (CPS1), which produces carbamoyl phosphate in the mitochondria from ammonia and bicarbonate, initiating nitrogen disposal...
May 24, 2017: Nature
https://www.readbyqxmd.com/read/28538184/taxane-platin-resistant-lung-cancers-co-develop-hypersensitivity-to-jumonjic-demethylase-inhibitors
#2
Maithili P Dalvi, Lei Wang, Rui Zhong, Rahul K Kollipara, Hyunsil Park, Juan Bayo, Paul Yenerall, Yunyun Zhou, Brenda C Timmons, Jaime Rodriguez-Canales, Carmen Behrens, Barbara Mino, Pamela Villalobos, Edwin R Parra, Milind Suraokar, Apar Pataer, Stephen G Swisher, Neda Kalhor, Natarajan V Bhanu, Benjamin A Garcia, John V Heymach, Kevin Coombes, Yang Xie, Luc Girard, Adi F Gazdar, Ralf Kittler, Ignacio I Wistuba, John D Minna, Elisabeth D Martinez
Although non-small cell lung cancer (NSCLC) patients benefit from standard taxane-platin chemotherapy, many relapse, developing drug resistance. We established preclinical taxane-platin-chemoresistance models and identified a 35-gene resistance signature, which was associated with poor recurrence-free survival in neoadjuvant-treated NSCLC patients and included upregulation of the JumonjiC lysine demethylase KDM3B. In fact, multi-drug-resistant cells progressively increased the expression of many JumonjiC demethylases, had altered histone methylation, and, importantly, showed hypersensitivity to JumonjiC inhibitors in vitro and in vivo...
May 23, 2017: Cell Reports
https://www.readbyqxmd.com/read/28537754/development-of-a-standardized-kalamazoo-communication-skills-assessment-tool-for-radiologists-validation-multisource-reliability-and-lessons-learned
#3
Stephen D Brown, Elizabeth A Rider, Katherine Jamieson, Elaine C Meyer, Michael J Callahan, Carolynn M DeBenedectis, Sarah D Bixby, Michele Walters, Sara F Forman, Pamela H Varrin, Peter Forbes, Christopher J Roussin
OBJECTIVE: The purpose of this study was to develop and test a standardized communication skills assessment instrument for radiology. MATERIALS AND METHODS: The Delphi method was used to validate the Kalamazoo Communication Skills Assessment instrument for radiology by revising and achieving consensus on the 43 items of the preexisting instrument among an interdisciplinary team of experts consisting of five radiologists and four nonradiologists (two men, seven women)...
May 24, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28535064/ten-fold-enhancement-of-inas-nanowire-photoluminescence-emission-with-an-inp-passivation-layer
#4
Pamela Jurczak, Yunyan Zhang, Jiang Wu, Ana M Sanchez, Martin Aagesen, Huiyun Liu
In this letter, we demonstrate that a significant improvement of optical performance of InAs nanowires can be achieved by capping the core InAs nanowires with a thin InP shell, which successfully passivates the surface states reducing the rate of non-radiative recombination. The improvements have been confirmed by detailed photoluminescence measurements, which showed up to ten-fold increase in the intensity of room-temperature photoluminescence from the capped InAs/InP nanowires compared to the sample with core-only InAs nanowires...
May 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28534133/silencing-of-the-rice-gene-lrr1-compromises-rice-xa21-transcript-accumulation-and-xa21-mediated-immunity
#5
Daniel F Caddell, Chang-Jin Park, Nicholas C Thomas, Patrick E Canlas, Pamela C Ronald
BACKGROUND: The rice immune receptor XA21 confers resistance to Xanthomonas oryzae pv. oryzae (Xoo), the causal agent of bacterial leaf blight. We previously demonstrated that an auxilin-like protein, XA21 BINDING PROTEIN 21 (XB21), positively regulates resistance to Xoo. RESULTS: To further investigate the function of XB21, we performed a yeast two-hybrid screen. We identified 22 unique XB21 interacting proteins, including LEUCINE-RICH REPEAT PROTEIN 1 (LRR1), which we selected for further analysis...
December 2017: Rice
https://www.readbyqxmd.com/read/28533211/targeting-key-angiogenic-pathways-with-a-bispecific-crossmab-optimized-for-neovascular-eye%C3%A2-diseases
#6
Jörg T Regula, Peter Lundh von Leithner, Richard Foxton, Veluchamy A Barathi, Chui Ming Gemmy Cheung, Sai Bo Bo Tun, Yeo Sia Wey, Daiju Iwata, Miroslav Dostalek, Jörg Moelleken, Kay G Stubenrauch, Everson Nogoceke, Gabriella Widmer, Pamela Strassburger, Michael J Koss, Christian Klein, David T Shima, Guido Hartmann
No abstract text is available yet for this article.
May 22, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28533166/risk-factors-for-30-day-mortality-in-patients-with-methicillin-resistant-staphylococcus-aureus-bloodstream-infections
#7
Pedro Ayau, Ana C Bardossy, Guillermo Sanchez, Ricardo Ortiz, Daniela Moreno, Pamela Hartman, Khulood Rizvi, Tyler C Prentiss, Mary B Perri, Meredith Mahan, Vanthida Huang, Katherine Reyes, Marcus J Zervos
OBJECTIVES: Methicillin-resistant Staphylococcus aureus (MRSA) blood stream infections (BSI) are a major health care problem accounting for a large percentage of nosocomial infections. The aim of this study was to identify risk factors associated with 30-day mortality in patients with MRSA BSI. METHODS: This was a retrospective study performed in Southeast Michigan. Over a 9- year period, total of 1,168 patients were identified with MRSA BSI. Patient demographics and clinical data were retrieved and evaluated using electronic medical health records...
May 19, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28532642/optical-mammography-in-patients-with-breast-cancer-undergoing-neoadjuvant-chemotherapy-individual-clinical-response-index
#8
Pamela G Anderson, Sirishma Kalli, Angelo Sassaroli, Nishanth Krishnamurthy, Shital S Makim, Roger A Graham, Sergio Fantini
RATIONALE AND OBJECTIVES: We present an optical mammography study that aims to develop quantitative measures of pathologic response to neoadjuvant chemotherapy (NAC) in patients with breast cancer. Such quantitative measures are based on the concentrations of oxyhemoglobin ([HbO2]), deoxyhemoglobin ([Hb]), total hemoglobin ([HbT]), and hemoglobin saturation (SO2) in breast tissue at the tumor location and at sequential time points during chemotherapy. MATERIALS AND METHODS: Continuous-wave, spectrally resolved optical mammography was performed in transmission and parallel-plate geometry on 10 patients before treatment initiation and at each NAC administration (mean number of optical mammography sessions: 12, range: 7-18)...
May 19, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28532184/a-review-of-invasive-and-non-invasive-sensory-feedback-in-upper-limb-prostheses
#9
Pamela Svensson, Ulrika Wijk, Anders Björkman, Christian Antfolk
The constant challenge to restore sensory feedback in prosthetic hands has provided several research solutions, but virtually none has reached clinical fruition. A prosthetic hand with sensory feedback that closely imitates an intact hand and provides a natural feeling may induce the prosthetic hand to be included in the body image and also reinforces the control of the prosthesis. Areas covered: This review presents non-invasive sensory feedback systems such as mechanotactile, vibrotactile, electrotactile and combinational systems which combine the modalities; multi-haptic feedback...
May 22, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28530120/osteochondral-allograft-transplantation-and-opening-wedge-tibial-osteotomy-clinical-results-of-a-combined-single-procedure
#10
Albert C Hsu, Luis E P Tirico, Abraham G Lin, Pamela A Pulido, William D Bugbee
Objective To evaluate the outcome of patients who have undergone simultaneous osteotomy and osteochondral allograft (OCA) transplantation. Our hypothesis is that use of high tibial osteotomy and fresh OCA in a combined procedure is safe and effective without increasing morbidity in comparison to OCA alone. Design A case series of 17 patients underwent tibial osteotomy and simultaneous OCA during a single surgery. Osteotomy was indicated when axial alignment was within the affected compartment. Patients had a minimum of 2 years of follow-up after surgery...
May 1, 2017: Cartilage
https://www.readbyqxmd.com/read/28530007/preventive-effect-of-cpp-acpf-paste-and-fluoride-toothpastes-against-erosion-and-erosion-plus-abrasion-%C3%A2-in-vitro-a-3d-profilometric-analysis
#11
Genaina Guimarães Soares, Pâmela Amorim Magalhães, Ana Beatriz Monteiro Fonseca, Monica Almeida Tostes, Eduardo Moreira da Silva, Thereza Christina Lopes Coutinho
PURPOSE: To evaluate the effect of CPP-ACPF paste and fluoride toothpastes on enamel subjected to erosion and erosion plus abrasion in vitro. MATERIALS AND METHODS: A total of 220 human enamel blocks were divided into eleven groups (n = 20): CPP-ACPF paste (MPP), potassium nitrate/sodium fluoride toothpaste (PE), sodium fluoride toothpaste (FD), fluoride-free toothpaste (SO) and control (erosion only with no paste or toothpastes; CO) according to the experimental design: erosion or erosion plus abrasion immediately after erosion (ERO+I-ABR) or 30 min after erosion (ERO+30min-ABR)...
May 19, 2017: Oral Health & Preventive Dentistry
https://www.readbyqxmd.com/read/28529508/the-biosynthetic-gene-cluster-for-andrastin-a-in-penicillium-roqueforti
#12
Juan F Rojas-Aedo, Carlos Gil-Durán, Abdiel Del-Cid, Natalia Valdés, Pamela Álamos, Inmaculada Vaca, Ramón O García-Rico, Gloria Levicán, Mario Tello, Renato Chávez
Penicillium roqueforti is a filamentous fungus involved in the ripening of several kinds of blue cheeses. In addition, this fungus produces several secondary metabolites, including the meroterpenoid compound andrastin A, a promising antitumoral compound. However, to date the genomic cluster responsible for the biosynthesis of this compound in P. roqueforti has not been described. In this work, we have sequenced and annotated a genomic region of approximately 29.4 kbp (named the adr gene cluster) that is involved in the biosynthesis of andrastin A in P...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28528918/a-prospective-validation-study-of-sentinel-lymph-node-mapping-for-high-risk-endometrial-cancer
#13
Pamela T Soliman, Shannon N Westin, Shayan Dioun, Charlotte C Sun, Elizabeth Euscher, Mark F Munsell, Nicole D Fleming, Charles Levenback, Michael Frumovitz, Pedro T Ramirez, Karen H Lu
OBJECTIVE: Sentinel lymph node (SLN) mapping continues to evolve in the surgical staging of endometrial cancer (EC). The purpose of this trial was to identify the sensitivity, false negative rate (FNR) and FN predictive value (FNPV) of SLN compared to complete pelvic and para-aortic lymphadenectomy (LAD) in women with high-risk EC. METHODS: Women with high-risk EC (grade 3, serous, clear cell, carcinosarcoma) were enrolled in this prospective surgical trial. All patients underwent preoperative PET/CT and intraoperative SLN biopsy followed by LAD...
May 18, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28528221/bronchopulmonary-dysplasia-and-perinatal-characteristics-predict-1-year-respiratory-outcomes-in-newborns-born-at-extremely-low-gestational-age-a-prospective-cohort-study
#14
Roberta L Keller, Rui Feng, Sara B DeMauro, Thomas Ferkol, William Hardie, Elizabeth E Rogers, Timothy P Stevens, Judith A Voynow, Scarlett L Bellamy, Pamela A Shaw, Paul E Moore
OBJECTIVE: To assess the utility of clinical predictors of persistent respiratory morbidity in extremely low gestational age newborns (ELGANs). STUDY DESIGN: We enrolled ELGANs (<29 weeks' gestation) at ≤7 postnatal days and collected antenatal and neonatal clinical data through 36 weeks' postmenstrual age. We surveyed caregivers at 3, 6, 9, and 12 months' corrected age to identify postdischarge respiratory morbidity, defined as hospitalization, home support (oxygen, tracheostomy, ventilation), medications, or symptoms (cough/wheeze)...
May 17, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28527904/incidence-and-risk-factors-of-food-allergy-after-umbilical-cord-blood-transplantation-in-children
#15
Alfonso Hernández-Ojeda, Nicolás Rojas, Francisco Barriga, María Angélica Wietstruck, Pamela S Morales, Arturo Borzutzky
No abstract text is available yet for this article.
May 17, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28527644/conceptual-structure-of-health-related-quality-of-life-for-persons-with-traumatic-brain-injury-confirmatory-factor-analysis-of-the-tbi-qol
#16
Mark Sherer, Julia Maria Paul Poritz, David Tulsky, Pamela Kisala, Luis Leon-Novelo, Esther Ngan
OBJECTIVE: To determine the factor structure of the Traumatic Brain Injury - Quality of Life (TBI-QOL) measurement system. DESIGN: Observational. SETTING: 3 TBI Model Systems rehabilitation centers in the US PARTICIPANTS: and Methods: 20 TBI-QOL item banks were administered to a sample of 504 community-dwelling adults with traumatic brain injury (TBI) as part of a study of TBI classification. A subsample of n=200 participants was randomly selected for exploratory factor analyses (EFA), while data from the remaining 304 participants were used for the confirmatory factor analysis (CFA)...
May 17, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28527548/propofol-versus-midazolam-fentanyl-sedation-for-colonoscopy-in-the-elderly-patient-population
#17
Pamela Lovett, Victoria Gómez, David O Hodge, Beth Ladlie
PURPOSE: Despite current literature, data on the most effective sedation and best patient outcomes are insufficient for providing recovery time recommendations for elderly patients undergoing colonoscopy with sedation. We sought to identify the best sedation practice for shorter recovery times. Therefore, a study was conducted to examine recovery times among patients older than 65 years undergoing elective colonoscopy with intravenous sedation with either propofol or the combination of midazolam/fentanyl...
June 2017: Journal of Perianesthesia Nursing: Official Journal of the American Society of PeriAnesthesia Nurses
https://www.readbyqxmd.com/read/28526388/serum-vitamin-d-and-change-in-lipid-levels-over-5%C3%A2-y-the-atherosclerosis-risk-in-communities-study
#18
Kamil F Faridi, Di Zhao, Seth S Martin, Joshua R Lupton, Steven R Jones, Eliseo Guallar, Christie M Ballantyne, Pamela L Lutsey, Erin D Michos
OBJECTIVES: Deficiency of 25-hydroxyvitamin D (25[OH]D) is associated with increased risk for cardiovascular disease, perhaps mediated through dyslipidemia. Deficient 25(OH)D is cross-sectionally associated with dyslipidemia, but little is known about longitudinal lipid changes. The aim of this study was to determine the relationship of 25(OH)D deficiency to longitudinal lipid changes and risk for incident dyslipidemia. METHODS: This was a longitudinal community-based study of 13 039 participants from the ARIC (Atherosclerosis Risk in Communities) study who had 25(OH)D and lipids measured at baseline (1990-1992) and lipids remeasured in 1993 to 1994 and 1996 to 1998...
June 2017: Nutrition
https://www.readbyqxmd.com/read/28525961/passive-and-active-immunization-against-respiratory-syncytial-virus-for-the-young-and-old
#19
Tonya Villafana, Judith Falloon, M Pamela Griffin, Qing Zhu, Mark T Esser
Respiratory syncytial virus (RSV) is the leading cause of lower respiratory tract infections in infants worldwide and also causes significant disease in the elderly. Despite 60 years of RSV research and vaccine development, there is only one approved medicine to prevent RSV infections. Palivizumab, a monoclonal antibody (mAb) against the RSV fusion (F) protein, is indicated for preterm infants and children at high-risk for RSV infections. It is an active time in RSV vaccine and mAb development with 14 vaccines and 2 mAbs currently being tested in clinical trials as of 13 February 2017...
May 19, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28525877/functional-network-connectivity-predicts-treatment-outcome-during-treatment-of-nicotine-use-disorder
#20
Claire E Wilcox, Vince D Calhoun, Srinivas Rachakonda, Eric D Claus, Rae A Littlewood, Jessica Mickey, Pamela B Arenella, Kent E Hutchison
Altered resting state functional connectivity (rsFC) and functional network connectivity (FNC), which is a measure of coherence between brain networks, may be associated with nicotine use disorder (NUD). We hypothesized that higher connectivity between insula and 1) dorsal anterior cingulate cortex (dACC) and 2) dorsolateral prefrontal cortex (dlPFC) would predict better treatment outcomes. We also performed an exploratory analysis of the associations between FNC values between additional key frontal and striatal regions and treatment outcomes...
April 30, 2017: Psychiatry Research
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