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https://www.readbyqxmd.com/read/28508528/competing-risks-model-in-screening-for-preeclampsia-in-twin-pregnancies-by-maternal-characteristics-and-medical-history
#1
Carla Francisco, David Wright, Zsófia Benkő, Argyro Syngelaki, Kypros H Nicolaides
OBJECTIVE: A survival-time regression model for the gestational age at delivery with preeclampsia (PE) in singleton pregnancies using maternal demographic characteristics and medical history was previously reported. The objective of this paper is to extend this model for dichorionic (DC) and monochorionic (MC) twin pregnancies. METHODS: The study population included 1,789 DC and 430 MC twin pregnancies and 93,297 singleton pregnancies. A survival-time model for the gestational age at delivery with PE was developed from variables of maternal characteristics and history...
May 15, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28503165/stress-related-and-circadian-secretion-and-target-tissue-actions-of-glucocorticoids-impact-on-health
#2
REVIEW
Nicolas C Nicolaides, Evangelia Charmandari, Tomoshige Kino, George P Chrousos
Living organisms are highly complex systems that must maintain a dynamic equilibrium or homeostasis that requires energy to be sustained. Stress is a state in which several extrinsic or intrinsic disturbing stimuli, the stressors, threaten, or are perceived as threatening, homeostasis. To achieve homeostasis against the stressors, organisms have developed a highly sophisticated system, the stress system, which provides neuroendocrine adaptive responses, to restore homeostasis. These responses must be appropriate in terms of size and/or duration; otherwise, they may sustain life but be associated with detrimental effects on numerous physiologic functions of the organism, leading to a state of disease-causing disturbed homeostasis or cacostasis...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28501967/plaque-tissue-morphology-based-stroke-risk-stratification-using-carotid-ultrasound-a-polling-based-pca-learning-paradigm
#3
Luca Saba, Pankaj K Jain, Harman S Suri, Nobutaka Ikeda, Tadashi Araki, Bikesh K Singh, Andrew Nicolaides, Shoaib Shafique, Ajay Gupta, John R Laird, Jasjit S Suri
Severe atherosclerosis disease in carotid arteries causes stenosis which in turn leads to stroke. Machine learning systems have been previously developed for plaque wall risk assessment using morphology-based characterization. The fundamental assumption in such systems is the extraction of the grayscale features of the plaque region. Even though these systems have the ability to perform risk stratification, they lack the ability to achieve higher performance due their inability to select and retain dominant features...
June 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28470791/impaired-placentation-in-women-with-chronic-hypertension-that-develop-preeclampsia
#4
Anca M Panaitescu, Ranjit Akolekar, Nicholas Kametas, Argyro Syngelaki, Kypros H Nicolaides
OBJECTIVE: To compare the degree of impaired placentation in pregnancies which develop preeclampsia (PE) in women with and without chronic hypertension (CH). METHODS: The data for this study were derived from prospective screening for adverse pregnancy outcomes in women with singleton pregnancies attending for their first routine hospital visit at 11(+0) -13(+6) weeks' gestation. This visit included recording of maternal characteristics and medical history and measurements of mean arterial pressure (MAP), uterine artery pulsatility index (UTPI), serum placental growth factor (PLGF) and serum pregnancy associated plasma protein-A (PAPP-A)...
May 4, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28453743/targeted-next-generation-sequencing-of-pediatric-neuro-oncology-patients-improves-diagnosis-identifies-pathogenic-germline-mutations-and-directs-targeted-therapy
#5
Cassie N Kline, Nancy M Joseph, James P Grenert, Jessica van Ziffle, Eric Talevich, Courtney Onodera, Mariam Aboian, Soonmee Cha, David R Raleigh, Steve Braunstein, Joseph Torkildson, David Samuel, Michelle Bloomer, Alejandra G de Alba Campomanes, Anuradha Banerjee, Nicholas Butowski, Corey Raffel, Tarik Tihan, Andrew W Bollen, Joanna J Phillips, W Michael Korn, Iwei Yeh, Boris C Bastian, Nalin Gupta, Sabine Mueller, Arie Perry, Theodore Nicolaides, David A Solomon
Background.: Molecular profiling is revolutionizing cancer diagnostics and leading to personalized therapeutic approaches. Herein we describe our clinical experience performing targeted sequencing for 31 pediatric neuro-oncology patients. Methods.: We sequenced 510 cancer-associated genes from tumor and peripheral blood to identify germline and somatic mutations, structural variants, and copy number changes. Results.: Genomic profiling was performed on 31 patients with tumors including 11 high-grade gliomas, 8 medulloblastomas, 6 low-grade gliomas, 1 embryonal tumor with multilayered rosettes, 1 pineoblastoma, 1 uveal ganglioneuroma, 1 choroid plexus carcinoma, 1 chordoma, and 1 high-grade neuroepithelial tumor...
May 1, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28450240/correlation-of-fcgrt-genomic-structure-with-serum-immunoglobulin-albumin-and-farletuzumab-pharmacokinetics-in-patients-with-first-relapsed-ovarian-cancer
#6
Daniel J O'Shannessy, Katie Bendas, Charles Schweizer, Wenquan Wang, Earl Albone, Elizabeth B Somers, Susan Weil, Rhonda K Meredith, Jason Wustner, Luigi Grasso, Mark Landers, Nicholas C Nicolaides
Farletuzumab (FAR) is a humanized monoclonal antibody (mAb) that binds to folate receptor alpha. A Ph3 trial in ovarian cancer patients treated with carboplatin/taxane plus FAR or placebo did not meet the primary statistical endpoint. Subgroup analysis demonstrated that subjects with high FAR exposure levels (Cmin>57.6μg/mL) showed statistically significant improvements in PFS and OS. The neonatal Fc receptor (fcgrt) plays a central role in albumin/IgG stasis and mAb pharmacokinetics (PK). Here we evaluated fcgrt sequence and association of its promoter variable number tandem repeats (VNTR) and coding single nucleotide variants (SNV) with albumin/IgG levels and FAR PK in the Ph3 patients...
April 24, 2017: Genomics
https://www.readbyqxmd.com/read/28436175/chronic-hypertension-and-adverse-pregnancy-outcomes-a-cohort-study
#7
Anca M Panaitescu, Argyro Syngelaki, Natalia Prodan, Ranjit Akolekar, Kypros H Nicolaides
OBJECTIVE: To examine the association between chronic hypertension (CH) and a wide range of adverse pregnancy outcomes after adjustment for confounding factors in obstetric history and maternal characteristics. METHODS: This was a prospective screening study for adverse pregnancy outcomes in women with singleton pregnancies attending the first routine hospital visit at 11(+0) -13(+6) weeks' gestation. Data on maternal characteristics, medical and obstetric history and pregnancy outcomes were collected...
April 23, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28434113/precision-knockdown-of-egfr-gene-expression-using-radio-frequency-electromagnetic-energy
#8
Ilya V Ulasov, Haidn Foster, Mike Butters, Jae-Geun Yoon, Tomoko Ozawa, Theodore Nicolaides, Xavier Figueroa, Parvinder Hothi, Michael Prados, John Butters, Charles Cobbs
Electromagnetic fields (EMF) in the radio frequency energy (RFE) range can affect cells at the molecular level. Here we report a technology that can record the specific RFE signal of a given molecule, in this case the siRNA of epidermal growth factor receptor (EGFR). We demonstrate that cells exposed to this EGFR siRNA RFE signal have a 30-70% reduction of EGFR mRNA expression and ~60% reduction in EGFR protein expression vs. control treated cells. Specificity for EGFR siRNA effect was confirmed via RNA microarray and antibody dot blot array...
April 22, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28418379/exercise-contagion-in-a-global-social-network
#9
Sinan Aral, Christos Nicolaides
We leveraged exogenous variation in weather patterns across geographies to identify social contagion in exercise behaviours across a global social network. We estimated these contagion effects by combining daily global weather data, which creates exogenous variation in running among friends, with data on the network ties and daily exercise patterns of ∼1.1M individuals who ran over 350M km in a global social network over 5 years. Here we show that exercise is socially contagious and that its contagiousness varies with the relative activity of and gender relationships between friends...
April 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28397325/analysis-of-cell-free-dna-in-maternal-blood-in-screening-for-aneuploidies-updated-meta-analysis
#10
REVIEW
M M Gil, V Accurti, B Santacruz, M N Plana, K H Nicolaides
OBJECTIVE: To review clinical validation or implementation studies of maternal blood cell-free (cf) DNA analysis and define the performance of screening for fetal trisomies 21, 18 and 13 and sex chromosome aneuploidies. DATA SOURCES: Searches of PubMed, Embase and the Cochrane library were performed to identify all peer-reviewed articles on cfDNA testing in screening for aneuploidies between January 2011, when the first such study was published and 31 December 2016...
April 11, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28339824/a-phase-i-trial-of-the-mek-inhibitor-selumetinib-azd6244-in-pediatric-patients-with-recurrent-or-refractory-low-grade-glioma-a-pediatric-brain-tumor-consortium-pbtc-study
#11
Anuradha Banerjee, Regina I Jakacki, Arzu Onar-Thomas, Shengjie Wu, Theodore Nicolaides, Tina Young Poussaint, Jason Fangusaro, Joanna Phillips, Arie Perry, David Turner, Michael Prados, Roger J Packer, Ibrahim Qaddoumi, Sridharan Gururangan, Ian F Pollack, Stewart Goldman, Lawrence A Doyle, Clinton F Stewart, James M Boyett, Larry E Kun, Maryam Fouladi
Background.: Activation of the mitogen-activated protein kinase pathway is important for growth of pediatric low-grade gliomas (LGGs). The aim of this study was to determine the recommended phase II dose (RP2D) and the dose-limiting toxicities (DLTs) of the MEK inhibitor selumetinib in children with progressive LGG. Methods.: Selumetinib was administered orally starting at 33 mg/m2/dose b.i.d., using the modified continual reassessment method. Pharmacokinetic analysis was performed during the first course...
February 28, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28317207/hidden-high-rate-of-preeclampsia-in-twin-compared-to-singleton-pregnancies
#12
Carla Francisco, David Wright, Zsófia Benkő, Argyro Syngelaki, Kypros H Nicolaides
OBJECTIVE: To examine the gestational age at delivery with and without preeclampsia (PE) in dichorionic (DC) and monochorionic (MC) twin pregnancies and determine the relative risk for total and preterm-PE compared to singleton pregnancies. METHODS: This was a screening study for PE in twin pregnancies undergoing first-trimester combined screening for aneuploidy and subsequently delivering two phenotypically normal live or stillborn babies at ≥24 weeks' gestation...
March 19, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28304223/metastatic-clival-chordoma-a-case-report-of-multiple-extraneural-metastases-following-resection-and-proton-beam-radiotherapy-in-a-5-year-old-boy
#13
Martin J Rutkowski, Harjus S Birk, Matthew D Wood, Arie Perry, Theodore Nicolaides, Christopher P Ames, Nalin Gupta
The authors report the case of a 5-year-old boy in whom extraneural metastases developed 5 years after he underwent an occipitocervical fusion and transoral approach to treat a clival chordoma without local recurrence. Following primary resection, the patient's postoperative course was complicated by recurrent meningitis secondary to CSF leak, which responded to antibiotics, and communicating hydrocephalus, for which a ventriculoperitoneal shunt was placed. The patient then underwent postoperative proton beam radiotherapy...
May 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28295782/multicenter-screening-for-preeclampsia-by-maternal-factors-and-biomarkers-at-11-13-weeks-gestation-comparison-to-nice-guidelines-and-acog-recommendations
#14
Neil O' Gorman, David Wright, Liona C Poon, Daniel L Rolnik, Argyro Syngelaki, Mercedes de Alvarado, Ilma F Carbone, Vivien Dutemeyer, Madgalena Fiolna, Alex Frick, Natalia Karagiotis, Sofia Mastrodima, Catalina de Paco Matallana, George Papaioannou, Andrea Pazos, Walter Plasencia, Kypros H Nicolaides
OBJECTIVE: To compare the performance of screening for preeclampsia (PE) based on risk factors from the medical history, as recommended by NICE and ACOG, with the method proposed by the Fetal Medicine Foundation (FMF), which uses Bayes theorem to combine the a priori risk from maternal factors, derived by a multivariable logistic model, with the results of various combinations of biophysical and biochemical measurements. METHODS: This was a prospective multicenter study of screening for PE in 8,775 singleton pregnancies at 11-13 weeks' gestation...
March 10, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28295773/a-study-protocol-for-the-prospective-validation-study-screening-programme-for-pre-eclampsia-spree
#15
Min Yi Tan, Lemonia Koutoulas, David Wright, Kypros H Nicolaides, Liona C Poon
INTRODUCTION: Pre-eclampsia (PE), which affects about 2% of pregnancies, is a major cause of maternal and perinatal morbidity and mortality. Early detection of PE can improve pregnancy outcome by providing timely intervention and closer monitoring. The current guideline from the National Institute for Health and Care Excellence (NICE) recommends that at the booking visit, women identified with one major risk factor or more than one moderate risk factor for PE should be advised to take low-dose aspirin daily from 12 weeks until the birth of the baby...
March 13, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28295722/cerclage-for-short-cervix-on-ultrasound-in-singleton-gestations-without-prior-spontaneous-preterm-birth-a-systematic-review-and-meta-analysis-of-trials-using-individual-patient-level-data
#16
REVIEW
Vincenzo Berghella, Andrea Ciardulli, Orion A Rust, Meekai To, Katsufumi Otsuki, Sietske Althuisius, Kypros Nicolaides, Amanda Roman, Gabriele Saccone
OBJECTIVE: The aim of this systematic review and meta-analysis was to quantify the efficacy of cervical cerclage in preventing preterm birth (PTB) in asymptomatic singleton pregnancies with a mid-trimester short transvaginal ultrasound cervical length (TVU CL) and without prior spontaneous PTB. METHODS: Electronic databases were searched from inception of each database until February 2017. No language restrictions were applied. We included all randomized controlled trials (RCTs) of asymptomatic singleton pregnancies without prior spontaneous PTB screened with TVU CL, found to have a midtrimester short CL <25 mm, and then randomized to management with either cerclage (i...
March 10, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28294444/effect-of-change-in-posture-on-maternal-functional-hemodynamics-at-35-37-weeks-gestation
#17
Gavin P Guy, Hua Z Ling, Mirian Machuca, Liona C Poon, Kypros H Nicolaides
OBJECTIVE: To evaluate the effect of posture change from the supine to sitting position and before and after passive leg raising on maternal functional hemodynamics in pregnant women at 35-37 weeks' gestation and to compare the changes in pregnancies that subsequently developed preeclampsia (PE) and gestational hypertension (GH) to those who remained normotensive. METHODS: In 3,013 singleton pregnancies at 35-37 weeks' gestation maternal cardiovascular parameters were measured using an automated non-invasive cardiac monitor...
March 13, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28292440/a-kinase-inhibitor-targeted-to-mtorc1-drives-regression-in-glioblastoma
#18
QiWen Fan, Ozlem Aksoy, Robyn A Wong, Shirin Ilkhanizadeh, Chris J Novotny, William C Gustafson, Albert Yi-Que Truong, Geraldine Cayanan, Erin F Simonds, Daphne Haas-Kogan, Joanna J Phillips, Theodore Nicolaides, Masanori Okaniwa, Kevan M Shokat, William A Weiss
Although signaling from phosphatidylinositol 3-kinase (PI3K) and AKT to mechanistic target of rapamycin (mTOR) is prominently dysregulated in high-grade glial brain tumors, blockade of PI3K or AKT minimally affects downstream mTOR activity in glioma. Allosteric mTOR inhibitors, such as rapamycin, incompletely block mTORC1 compared with mTOR kinase inhibitors (TORKi). Here, we compared RapaLink-1, a TORKi linked to rapamycin, with earlier-generation mTOR inhibitors. Compared with rapamycin and Rapalink-1, TORKi showed poor durability...
March 13, 2017: Cancer Cell
https://www.readbyqxmd.com/read/28266156/re-cervical-length-screening-for-prevention-of-preterm-birth-in-singleton-pregnancy-with-threatened-preterm-labor-systematic-review-and-meta-analysis-of-randomized-controlled-trials-using-individual-patient-level-data-v-berghella-m-palacio-a-ness-z-alfirevic
#19
COMMENT
https://www.readbyqxmd.com/read/28241970/automated-segmental-imt-measurement-in-thin-thick-plaque-with-bulb-presence-in-carotid-ultrasound-from-multiple-scanners-stroke-risk-assessment
#20
Nobutaka Ikeda, Nilanjan Dey, Aditya Sharma, Ajay Gupta, Soumyo Bose, Suvojit Acharjee, Shoaib Shafique, Elisa Cuadrado-Godia, Tadashi Araki, Luca Saba, John R Laird, Andrew Nicolaides, Jasjit S Suri
BACKGROUND AND OBJECTIVES: Standardization of the carotid IMT requires a reference marker in ultrasound scans. It has been shown previously that manual reference marker and manually created carotid segments are used for measuring IMT in these segments. Manual methods are tedious, time consuming, subjective, and prone to errors. Bulb edge can be considered as a reference marker for measurements of the cIMT. However, bulb edge can be difficult to locate in ultrasound scans due to: (a) low signal to noise ratio in the bulb region as compared to common carotid artery region; (b) uncertainty of bulb location in craniocaudal direction; and (c) variability in carotid bulb shape and size...
April 2017: Computer Methods and Programs in Biomedicine
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