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https://www.readbyqxmd.com/read/28817573/network-representations-of-angular-regions-for-electromagnetic-scattering
#1
Vito G Daniele, Guido Lombardi, Rodolfo S Zich
Network modeling in electromagnetics is an effective technique in treating scattering problems by canonical and complex structures. Geometries constituted of angular regions (wedges) together with planar layers can now be approached with the Generalized Wiener-Hopf Technique supported by network representation in spectral domain. Even if the network representations in spectral planes are of great importance by themselves, the aim of this paper is to present a theoretical base and a general procedure for the formulation of complex scattering problems using network representation for the Generalized Wiener Hopf Technique starting basically from the wave equation...
2017: PloS One
https://www.readbyqxmd.com/read/28771616/quantification-of-transplant-derived-circulating-cell-free-dna-in-absence-of-a-donor-genotype
#2
Eilon Sharon, Hao Shi, Sandhya Kharbanda, Winston Koh, Lance R Martin, Kiran K Khush, Hannah Valantine, Jonathan K Pritchard, Iwijn De Vlaminck
Quantification of cell-free DNA (cfDNA) in circulating blood derived from a transplanted organ is a powerful approach to monitoring post-transplant injury. Genome transplant dynamics (GTD) quantifies donor-derived cfDNA (dd-cfDNA) by taking advantage of single-nucleotide polymorphisms (SNPs) distributed across the genome to discriminate donor and recipient DNA molecules. In its current implementation, GTD requires genotyping of both the transplant recipient and donor. However, in practice, donor genotype information is often unavailable...
August 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28730277/regulation-of-class-v-myosin
#3
REVIEW
Ning Zhang, Lin-Lin Yao, Xiang-Dong Li
Class V myosin (myosin-5) is a molecular motor that functions as an organelle transporter. The activation of myosin-5's motor function has long been known to be associated with a transition from the folded conformation in the off-state to the extended conformation in the on-state, but only recently have we begun to understand the underlying mechanism. The globular tail domain (GTD) of myosin-5 has been identified as the inhibitory domain and has recently been shown to function as a dimer in regulating the motor function...
July 20, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28713902/establishment-and-characterization-of-cell-lines-derived-from-complete-hydatidiform-mole
#4
Eiko Yamamoto, Kaoru Niimi, Tohru Kiyono, Toshimichi Yamamoto, Kimihiro Nishino, Kenichi Nakamura, Tomomi Kotani, Hiroaki Kajiyama, Kiyosumi Shibata, Fumitaka Kikkawa
Gestational trophoblastic diseases (GTDs) are a group of diseases characterized by abnormal cellular proliferation of atypical trophoblasts. A hydatidiform mole is an abnormal pregnancy caused by genetic fertilization disorders, and it can be classified as a complete hydatidiform mole (CHM) or a partial hydatidiform mole. The aim of this study was to establish cell lines from CHMs and to characterize the cells for future studies concerning GTD. HMol1-2C, HMol1-3B, HMol1-8 and HMol3-1B were established from primary cultures of CHM explants following the introduction of different combinations of genes including human telomerase reverse transcriptase (hTERT), a mutant form of CDK (CDK4R24C), cyclin D1, p53C234, MYC and HRAS...
September 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28692637/comparison-of-2-human-chorionic-gonadotropin-immunoassays-commercially-available-for-monitoring-patients-with-gestational-trophoblastic-disease
#5
Juliana Maria Quinalha de Souza, Antonio Braga, Rafael Sanches Dos Santos, Marcos Montanha Ramos, Rafael Cortés-Charry, Izildinha Maestá
OBJECTIVE: The aim of this study was to compare serum human chorionic gonadotropin (hCG) levels in patients with gestational trophoblastic disease (GTD) using 2 commercially available hCG immunoassays. METHODS: Serum samples were obtained from patients with GTD attending the Botucatu Medical School Trophoblastic Diseases Center of São Paulo State University (UNESP), from November 2014 to October 2015. Serum hCG levels were measured with both Architect i2000SR and Immulite 2000 XPi chemiluminescence assays...
July 7, 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28683302/salivary-calculi-removal-by-minimally-invasive-techniques-a-decision-tree-based-on-the-diameter-of-the-calculi-and-their-position-in-the-excretory-duct
#6
Jean Marc Foletti, Nicolas Graillon, Simon Avignon, Laurent Guyot, Cyrille Chossegros
PURPOSE: To suggest a decision tree for the choice of the best minimally invasive technique to treat submandibular and parotid calculi, according to the diameter of the calculi and their position in the excretory duct. MATERIALS AND METHODS: Submandibular and parotid ducts can both be divided into thirds, delineated by easily recognizable landmarks. The diameter of calculi is schematically classified into 1 of these 3 categories: floating, slightly impacted, or largely impacted...
June 14, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28607326/morphological-features-and-immunohistochemical-expression-of-p57kip2-in-early-molar-pregnancies-and-their-relations-to-the-progression-to-persistent-trophoblastic-disease
#7
Marwa Khashaba, Mohammad Arafa, Eman Elsalkh, Reda Hemida, Wagiha Kandil
BACKGROUND: Although the morphological features characteristic of products of conception specimens including molar pregnancies are well described, substantial histopathological similarities are observed between the different entities, especially in cases of early pregnancies. Furthermore, there are no current solid criteria that could predict cases with progression to persistent gestational trophoblastic disease. In this study, we aimed to determine the most specific histopathological and immunohistochemical features required for accurate diagnosis that can reliably predict the clinical behavior...
July 2017: Journal of Pathology and Translational Medicine
https://www.readbyqxmd.com/read/28571514/obstetric-ultrasound-aids-prompt-referral-of-gestational-trophoblastic-disease-in-marginalized-populations-on-the-thailand-myanmar-border
#8
Kathryn McGregor, Aung Myat Min, Noaeni Karunkonkowit, Suporn Keereechareon, Mary Ellen Tyrosvoutis, Nay Win Tun, Marcus J Rijken, Gabie Hoogenboom, Machteld Boel, Kesinee Chotivanich, François Nosten, Rose McGready
BACKGROUND: The use of obstetric ultrasound in the diagnosis of gestational trophoblastic disease (GTD) in high-income settings is well established, leading to prompt management and high survival rates. Evidence from low-income settings suggests ultrasound is essential in identifying complicated pregnancies, but with limited studies reviewing specific conditions including GTD. OBJECTIVE: The aim of this study is to review the role of ultrasound in diagnosis and management of GTD in a marginalized population on the Thailand-Myanmar border...
2017: Global Health Action
https://www.readbyqxmd.com/read/28567058/implementation-and-monitoring-of-a-gestational-trophoblastic-disease-management-program-in-a-tertiary-hospital-in-morocco-opportunities-and-challenges
#9
Imane Khachani, Mohamed Hassan Alami, Rachid Bezad
Objective. Gestational Trophoblastic Disease (GTD) management requires clear guidelines for diagnosis, treatment, and follow-up. Unequal management skills among practitioners, inadequate treatment, irregular surveillance, and drop-out are common in resource-limited settings and can lead to life-threatening complications and morbidities. To address these challenges, we implemented a GTD Management Program at the National Center for Reproductive Health in Rabat, Morocco. Methods and Program Description. In-depth review of management protocols was carried out, and concise guidelines were developed, with targeted training for physicians...
2017: Obstetrics and Gynecology International
https://www.readbyqxmd.com/read/28379570/gene-tree-discordance-does-not-explain-away-the-temporal-decline-of-convergence-in-mammalian-protein-sequence-evolution
#10
Zhengting Zou, Jianzhi Zhang
Several authors reported lower frequencies of protein sequence convergence between more distantly related evolutionary lineages and attributed this trend to epistasis, which renders the acceptable amino acids at a site more different and convergence less likely in more divergent lineages. A recent primate study, however, suggested that this trend is at least partially and potentially entirely an artifact of gene tree discordance (GTD). Here, we demonstrate in a genome-wide data set from 17 mammals that the temporal trend remains (1) upon the control of the GTD level, (2) in genes whose genealogies are concordant with the species tree, and (3) for convergent changes, which are extremely unlikely to be caused by GTD...
July 1, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28365860/low-molecular-weight-hyaluronan-induces-migration-of-human-choriocarcinoma-jeg-3-cells-mediated-by-rhamm-as-well-as-by-pi3k-and-mapk-pathways
#11
Marilina Mascaró, Matías A Pibuel, Silvina L Lompardía, Mariangeles Díaz, Elsa Zotta, Maria I Bianconi, Néstor Lago, Silvina Otero, Gustavo Jankilevich, Elida Alvarez, Silvia E Hajos
Hyaluronan (HA) is the major glycosaminoglycan present in the extracellular matrix. It is produced by some tumours and promotes proliferation, differentiation and migration among others cellular processes. Gestational trophoblastic disease (GTD) is composed by non-tumour entities, such as hydatidiform mole (HM), which is the most common type of GTD and also malignant entities such as choriocarcinoma (CC) and placental site trophoblastic tumour (PSTT), being CC the most aggressive tumour. Although there is a growing understanding of GTD biology, the role of HA in the pathogenesis of this group of diseases remains largely unknown...
August 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28287945/gestational-trophoblastic-disease-clinical-and-imaging-features
#12
Akram M Shaaban, Maryam Rezvani, Reham R Haroun, Anne M Kennedy, Khaled M Elsayes, Jeffrey D Olpin, Mohamed E Salama, Bryan R Foster, Christine O Menias
Gestational trophoblastic disease (GTD) is a spectrum of both benign and malignant gestational tumors, including hydatidiform mole (complete and partial), invasive mole, choriocarcinoma, placental site trophoblastic tumor, and epithelioid trophoblastic tumor. The latter four entities are referred to as gestational trophoblastic neoplasia (GTN). These conditions are aggressive with a propensity to widely metastasize. GTN can result in significant morbidity and mortality if left untreated. Early diagnosis of GTD is essential for prompt and successful management while preserving fertility...
March 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28266547/the-molecular-motor-myosin-va-interacts-with-the-cilia-centrosomal-protein-rpgrip1l
#13
L H P Assis, R M P Silva-Junior, L G Dolce, M R Alborghetti, R V Honorato, A F Z Nascimento, T D Melo-Hanchuk, D M Trindade, C C C Tonoli, C T Santos, P S L Oliveira, R E Larson, J Kobarg, E M Espreafico, P O Giuseppe, M T Murakami
Myosin Va (MyoVa) is an actin-based molecular motor abundantly found at the centrosome. However, the role of MyoVa at this organelle has been elusive due to the lack of evidence on interacting partners or functional data. Herein, we combined yeast two-hybrid screen, biochemical studies and cellular assays to demonstrate that MyoVa interacts with RPGRIP1L, a cilia-centrosomal protein that controls ciliary signaling and positioning. MyoVa binds to the C2 domains of RPGRIP1L via residues located near or in the Rab11a-binding site, a conserved site in the globular tail domain (GTD) from class V myosins...
March 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28217684/extrauterine-epithelioid-trophoblastic-tumor-in-hysterectomized-woman
#14
Ji-Hye Kim, Sun Kyung Lee, Soo Hyun Hwang, Jung-Sun Kim, Gun Yoon, Yoo-Young Lee, Tae-Joong Kim, Chel Hun Choi, Byoung-Gie Kim, Duk-Soo Bae, Jeong-Won Lee
Epithelioid trophoblastic tumor (ETT) is a very rare variant of gestational trophoblastic disease (GTD) which arises in reproductive age women with prior gestational history. Although abnormal vaginal bleeding is the most common symptom of ETT, there are no reported pathognomonic symptoms of ETT because of its rarity. ETT is similar to placental site trophoblastic tumor in terms of its slow growing characteristic and microscopic findings. Therefore, it could be misdiagnosed as placental site trophoblastic tumor or other types of GTD...
January 2017: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/28141940/are-early-pregnancy-complications-more-common-in-women-with-hyperemesis-gravidarum
#15
Sinead R Morgan, Lisa Long, Jemma Johns, Chloe Angwin, Supriya Maitra, Jackie A Ross
Ultrasound evaluation is usually requested for women presenting with hyperemesis gravidarum (HG) in early pregnancy. This is to check viability as well as to diagnose multiple pregnancies and exclude gestational trophoblastic disease (GTD). The aim of this retrospective case control study was to evaluate the early pregnancy outcomes in women with HG and to compare them with an asymptomatic control group. 790 women referred with HG between 2002 and 2014 were matched for gestational age and maternal age with an asymptomatic patient attending for a reassurance or dating scan...
January 31, 2017: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28060141/pd-l1-expression-in-premalignant-and-malignant-trophoblasts-from-gestational-trophoblastic-diseases-is-ubiquitous-and-independent-of-clinical-outcomes
#16
Pierre-Adrien Bolze, Sophie Patrier, Jérôme Massardier, Touria Hajri, Fatima Abbas, Anne Marie Schott, Fabienne Allias, Mojgan Devouassoux-Shisheboran, Gilles Freyer, François Golfier, Benoît You
OBJECTIVE: Recently reported expression of programmed cell death 1 ligand 1 (PD-L1) in gestational trophoblastic diseases (GTDs) suggests that the immune tolerance of pregnancy might be hijacked during neoplastic process. We assessed PD-L1 protein expression in premalignant and malignant GTD lesions and analyzed associations with disease severity and chemotherapy outcomes. METHODS: We included 83 GTD whole-tissue sections from 76 patients in different treatment settings...
March 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/27899973/expression-patterns-of-maspin-and-mutant-p53-are-associated-with-the-development-of-gestational-trophoblastic-neoplasia
#17
Pengming Sun, Qibin Wu, Guanyu Ruan, Xiu Zheng, Yiyi Song, Jianfan Zhun, Lixiang Wu, Walter H Gotlieb
Gestational trophoblastic disease (GTD) is a group of conditions that originate from the abnormal proliferation of trophoblastic cells. GTDs encompass hydatidiform moles (HMs) and gestational trophoblastic neoplasia (GTN). GTNs are a group of malignant diseases that require chemotherapy, or more aggressive treatment. There is a requirement for more tumor markers to predict the development of GTN from HMs. The current study evaluated the expression of maspin and tumor protein p53 (p53) in GTD, and their role in predicting the development of GTN...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27819410/comparing-and-evaluating-the-efficacy-of-methotrexate-and-actinomycin-d-as-first-line-single-chemotherapy-agents-in-low-risk-gestational-trophoblastic-disease
#18
COMPARATIVE STUDY
Young Jae Lee, Jeong Yeol Park, Dae Yeon Kim, Dae Shik Suh, Jong Hyeok Kim, Yong Man Kim, Young Tak Kim, Joo Hyun Nam
OBJECTIVE: The aim of this study was to compare responses to single-agent chemotherapies and evaluate the predictive factors of resistance in low risk (LR) gestational trophoblastic disease (GTD). The chemotherapy agents included methotrexate (MTX) and actinomycin D (ACT-D). METHODS: We conducted a retrospective study of 126 patients with GTD who were treated between 2000 and 2013. A total of 71 patients with LR GTD were treated with MTX (8-day regimen or weekly regimen, n=53) or ACT-D (bi-weekly pulsed regimen or 5-day regimen, n=18)...
March 2017: Journal of Gynecologic Oncology
https://www.readbyqxmd.com/read/27716915/stricture-location-predicts-swallowing-outcomes-following-endoscopic-rendezvous-procedures
#19
Katherine N Adams, Rupali N Shah, Robert A Buckmire
OBJECTIVES/HYPOTHESIS: Complete pharyngoesophageal strictures may be encountered by the otolaryngologist as a consequence of radiation/chemoradiotherapy therapies for head and neck cancer. A combined anterograde and retrograde dilation procedure (rendezvous procedure) has proven to be a useful surgical intervention in these cases. We assess the long-term swallowing outcomes of this patient cohort including gastrostomy tube (G-tube) reliance, swallowing quality of life, and variables that contribute to improved swallowing outcomes...
June 2017: Laryngoscope
https://www.readbyqxmd.com/read/27679689/imaging-and-clinical-data-of-placental-site-trophoblastic-tumor-a-case-report
#20
Maryam Niknejadi, Firoozeh Ahmadi, Farnaz Akhbari
Placental site trophoblastic tumor (PSTT) is a very rare variant of gestational trophoblastic tumor. It can occur after normal termination of pregnancy or spontaneous abortion and ectopic or molar pregnancy. There is a wide range of clinical manifestations from a benign condition to an aggressive disease with fatal outcome. One of the most important characteristics of PSTT, unlike other forms of gestational trophoblastic diseases (GTD) is the presence of low beta-subunit of human chorionic gonadotropin (β-hCG) levels because it is a neoplastic proliferation of intermediate trophoblastic cells...
April 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
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