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https://www.readbyqxmd.com/read/28507300/minimum-toe-clearance-probing-the-neural-control-of-locomotion
#1
Tim Killeen, Christopher S Easthope, László Demkó, Linard Filli, Lilla Lőrincz, Michael Linnebank, Armin Curt, Björn Zörner, Marc Bolliger
Minimum toe clearance (MTC) occurs during a highly dynamic phase of the gait cycle and is associated with the highest risk of unintentional contact with obstacles or the ground. Age, cognitive function, attention and visual feedback affect foot clearance but how these factors interact to influence MTC control is not fully understood. We measured MTC in 121 healthy individuals aged 20-80 under four treadmill walking conditions; normal walking, lower visual field restriction and two Stroop colour/word naming tasks of two difficulty levels...
May 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28506408/genetics-of-medullary-thyroid-cancer-an-overview
#2
REVIEW
Giacomo Accardo, Giovanni Conzo, Daniela Esposito, Claudio Gambardella, Marco Mazzella, Filomena Castaldo, Carlo Di Donna, Andrea Polistena, Nicola Avenia, Vittorio Colantuoni, Dario Giugliano, Daniela Pasquali
Medullary thyroid carcinoma (MTC) represents 3-5% of thyroid cancers. 75% is sporadic and 25% is the dominant component of the hereditary multiple endocrine neoplasia (MEN) type 2 syndromes. Three different subtypes of MEN2, such as MEN2A, MEN2B, and Familial MTC (FMTC) have been defined, based on presence or absence of hyperparathyroidism, pheocromocytoma and characteristic clinical features. Mutations of the RET proto-oncogene are implicated in the pathogenesis of MTC, but there are many other mutational patterns involved...
May 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28506049/-laparoscopic-non-ischemic-partial-nephrectomy-using-a-microwave-tissue-coagulator-a-single-institutional-study
#3
Shinji Fukui, Yusuke Iemura, Yoshiaki Matsumura, Yoriaki Kagebayashi, Shoji Samma
We retrospectively investigated the surgical outcomes of renal cell carcinoma (RCC), perioperative complications, and residual renal function in patients receiving laparoscopic non-ischemic partial nephrectomy using a microwave tissue coagulator (MTC). Between January 2002 and December 2015, laparoscopic non-ischemic partial nephrectomy using MTC was performed in 49 patients. The histological diagnosis was RCC in 38 patients, angiomyolipoma in 4, oncocytoma in 2, and others in 5. A histologicallyproven positive surgical margin was observed in 1 (2...
April 2017: Hinyokika Kiyo. Acta Urologica Japonica
https://www.readbyqxmd.com/read/28498409/demonstration-of-a-potent-ret-transcriptional-inhibitor-for-the-treatment-of-medullary-thyroid-carcinoma-based-on-an-ellipticine-derivative
#4
Vishnu Muthuraj Kumarasamy, Daekyu Sun
Dominant-activating mutations in the RET (rearranged during transfection) proto-oncogene, which encodes a receptor tyrosine kinase, is often associated with the development of medullary thyroid carcinoma (MTC). The proximal promoter region of the RET gene consists of a guanine-rich sequence containing five runs of three consecutive guanine residues that serve as the binding site for transcriptional factors. As we have recently shown, this stretch of nucleotides in the promoter region is highly dynamic in nature and tend to form non-B DNA secondary structures called G-quadruplexes, which suppress the transcription of the RET gene...
May 11, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28487941/identification-of-micrornas-associated-with-medullary-thyroid-carcinoma-by-bioinformatics-analyses
#5
Xiangjun Fu, Jugao Fang, Meng Lian, Qi Zhong, Hongzhi Ma, Ling Feng, Ru Wang, Haizhou Wang
The present study aimed to investigate the microRNA (miRNA) profile in human medullary thyroid carcinoma (MTC) tissue. The GSE40807 data profile was downloaded from the Gene Expression Omnibus database. Following preprocessing, differentially expressed microRNAs (DEMs) between MTC and healthy tissues were identified. Based on the obtained DEMs, transcription factor (TF)‑miRNA and miRNA‑target gene regulatory association pairs were predicted. Finally, functional enrichment analysis was performed on target genes of DEMs...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28475408/vandetanib-and-cabozantinib-potentiate-mitochondria-targeted-agents-to-suppress-medullary-thyroid-carcinoma-cells
#6
Dmytro Starenki, Seung-Keun Hong, Pui-Kei Wu, Jong-In Park
Although the FDA-approved receptor tyrosine kinases inhibitors, vandetanib and cabozantinib, are used to treat surgically inoperable progressive medullary thyroid carcinoma (MTC), not all patients are responsive while the disease sometimes progresses after an initial response. To better understand MTC drug resistance at molecular and biochemical levels, we have generated drug-resistant subpopulations of the human MTC cell lines, TT and MZ-CRC-1, via prolonged exposure to vandetanib and cabozantinib. These drug-resistant progenies exhibited substantial cross-resistance to vandetanib and cabozantinib, suggesting that these inhibitors may invoke an overlapping resistance mechanism(s) in MTC cells...
May 5, 2017: Cancer Biology & Therapy
https://www.readbyqxmd.com/read/28469189/role-of-differentially-expressed-microrna-139-5p-in-the-regulation-of-phenotypic-internal-anal-sphincter-smooth-muscle-tone
#7
Jagmohan Singh, Ipsita Mohanty, Sankar Addya, Benjamin Phillips, Hwan Mee Yong, Steven S An, Raymond B Penn, Satish Rattan
The present study focused on the role of microRNA-139-5p (miRNA-139-5p) in the regulation of basal tone in internal anal sphincter (IAS). Applying genome-wide miRNA microarrays on the phenotypically distinct smooth muscle cells (SMCs) within the rat anorectrum, we identified miRNA-139-5p as differentially expressed RNA repressor with highest expression in the purely phasic smooth muscle of anococcygeus (ASM) vs. the truly tonic smooth muscle of IAS. This pattern of miRNA-139-5p expression, previously shown to target ROCK2, was validated by target prediction using ingenuity pathway (IPA) and by qPCR analyses...
May 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28460476/ultrasonographic-characteristics-of-medullary-thyroid-carcinoma-a-comparison-with-papillary-thyroid-carcinoma
#8
Mei-Juan Liu, Zhong-Feng Liu, Yuan-Yuan Hou, Yan-Ming Men, Yu-Xi Zhang, Ling-Yun Gao, Hao Liu
This study was designed to explore differences in the ultrasonographic characteristics of medullary thyroid carcinoma (MTC) and papillary thyroid carcinoma (PTC). This study included 35 cases of MTC and 96 cases of PTC that were surgically and pathologically confirmed. Preoperative ultrasound images were retrospectively reviewed by two physicians (with 5 years' experience in thyroid ultrasound) under the premise of unknown pathological results. Various ultrasonic features of nodules were assessed objectively...
April 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28460289/effect-of-environmental-conditions-on-the-permeability-of-low-density-polyethylene-film-and-totally-impermeable-film-to-methyl-isothiocyanate-fumigant
#9
REVIEW
Wensheng Fang, Aocheng Cao, Dongdong Yan, Dawei Han, Jun Li, Xiaoman Liu, Yuan Li, Chanbin Ouyang, Qiuxia Wang
Fumigant methyl isothiocyanate (MITC) is a very promising alternative to methyl bromide, providing effective control of soil borne disease. However, there is a significant volatilization of MITC following fumigation because of its high application rates and high vapor pressure. Covering the soil surface with plastic tarps is a common approach used for restricting fumigant emissions to the atmosphere. To minimize atmospheric emissions of MITC by tarping, we determined the effect of temperature, humidity, and fumigant mixtures on the permeability to MITC of low density polyethylene film (LDPE) and totally impermeable film (TIF), using static sealed chambers...
April 28, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28453190/synergistic-activity-of-everolimus-and-5-aza-2-deoxycytidine-in-medullary-thyroid-carcinoma-cell-lines
#10
Giovanni Vitale, Alessandra Dicitore, Daniele Pepe, Davide Gentilini, Elisa Stellaria Grassi, Maria Orietta Borghi, Giulia Gelmini, Maria Celeste Cantone, Germano Gaudenzi, Gabriella Misso, Anna Maria Di Blasio, Leo J Hofland, Michele Caraglia, Luca Persani
Medullary thyroid cancer (MTC) is a tumor highly resistant to chemo- and radiotherapy. Drug resistance can be induced by epigenetic changes such as aberrant DNA methylation. To overcome drug resistance, we explored a promising approach based on the use of 5-aza-2'-deoxycytidine (AZA), a demethylating agent, in combination with the mTOR inhibitor everolimus in MTC cells (MZ-CRC-1 and TT). This combined treatment showed a strong synergistic antiproliferative activity through the induction of apoptosis. The effect of everolimus and/or AZA on genome-wide expression profiling was evaluated by Illumina BeadChip in MZ-CRC-1 cells...
April 28, 2017: Molecular Oncology
https://www.readbyqxmd.com/read/28451761/clinicopathological-significance-and-prognosis-of-medullary-thyroid-microcarcinoma-a-meta-analysis
#11
Jin Hwa Kim, Jung-Soo Pyo, Won Jin Cho
BACKGROUND: The objective of the present meta-analysis was to evaluate the clinicopathological significance and prognosis of micro-MTC compared to macro-MTC. METHODS: Relevant articles were obtained by searching the PubMed and MEDLINE databases. A meta-analysis was performed using 15 eligible studies. In addition, subgroup analysis based on heredity was performed in patients diagnosed with micro-MTC. RESULTS: The rate of extrathyroidal extension of micro-MTC [0...
April 27, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28438782/incidence-and-prevalence-of-multiple-endocrine-neoplasia-2b-in-denmark-a-nationwide-study
#12
Jes Sloth Mathiesen, Jens Peter Kroustrup, Peter Vestergaard, Mette Madsen, Kirstine Stochholm, Per Løgstrup Poulsen, Åse Krogh Rasmussen, Ulla Feldt-Rasmussen, Sten Schytte, Henrik Baymler Pedersen, Christoffer Holst Hahn, Jens Bentzen, Mette Gaustadnes, Torben Falck Ørntoft, Thomas van Overeem Hansen, Finn Cilius Nielsen, Kim Brixen, Anja Lisbeth Frederiksen, Christian Godballe
Extract: Multiple endocrine neoplasia 2B (MEN2B) is an autosomal dominant inherited cancer syndrome associating medullary thyroid carcinoma (MTC), pheochromocytoma (PHEO), ganglioneuromatosis of the aerodigestive tract and facial, ophthalmologic and skeletal abnormalities. MEN2B is caused by the M918T and A883F mutation of the REarranged during Transfection (RET) proto-oncogene in approximately 95% and <5% of cases, respectively. Only very few other mutations have been reported to cause MEN2B. In approximately 75% of MEN2B patients, mutations occur as de novo (Wells, et al...
April 24, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28435794/cushing-disease-in-a-patient-with-multiple-endocrine-neoplasia-type-2b
#13
Kannan Kasturi, Lucas Fernandes, Martha Quezado, Mary Eid, Leigh Marcus, Prashant Chittiboina, Mark Rappaport, Constantine A Stratakis, Brigitte Widemann, Maya Lodish
CONTEXT: Multiple endocrine neoplasia type 2B (MEN2B) is a rare autosomal-dominant cancer syndrome characterized in part by metastatic medullary thyroid cancer (MTC) and pheochromocytoma. Cushing disease is a rare cause of endogenous hypercortisolism in children. CASE DESCRIPTION: We describe a 21-year-old African-American male who was diagnosed at age 10 with an ACTH-secreting pituitary microadenoma. At age 16 he developed medullary thyroid cancer and was found to have multiple endocrine neoplasia type 2B with the characteristic M918T mutation of the RET proto-oncogene...
June 2017: J Clin Transl Endocrinol Case Rep
https://www.readbyqxmd.com/read/28435103/magnetization-transfer-contrast-and-chemical-exchange-saturation-transfer-mri-features-and-analysis-of-the-field-dependent-saturation-spectrum
#14
Peter C M van Zijl, Wilfred W Lam, Jiadi Xu, Linda Knutsson, Greg J Stanisz
Magnetization Transfer Contrast (MTC) and Chemical Exchange Saturation Transfer (CEST) experiments measure the transfer of magnetization from molecular protons to the solvent water protons, an effect that becomes apparent as an MRI signal loss ("saturation"). This allows molecular information to be accessed with the enhanced sensitivity of MRI. In analogy to Magnetic Resonance Spectroscopy (MRS), these saturation data are presented as a function of the chemical shift of participating proton groups, e.g. OH, NH, NH2, which is called a Z-spectrum...
April 21, 2017: NeuroImage
https://www.readbyqxmd.com/read/28429044/-68-ga-dotatate-pet-ct-in-recurrent-medullary-thyroid-carcinoma-a-lesion-by-lesion-comparison-with-111-in-octreotide-spect-ct-and-conventional-imaging
#15
Lilian Yuri Itaya Yamaga, Marcelo L Cunha, Guilherme C Campos Neto, Marcio R T Garcia, Ji H Yang, Cleber P Camacho, Jairo Wagner, Marcelo B G Funari
PURPOSE: The aim of this study was to prospectively compare the detection rate of (68)Ga-DOTATATE PET-CT with (111)In-octreotide SPECT-CT and conventional imaging (CI) in medullary thyroid carcinoma (MTC) patients with increased calcitonin (Ctn) levels but negative CI after thyroidectomy. METHODS: Fifteen patients with raised Ctn levels and/or CI evidence of recurrence underwent (68)Ga-DOTATATE PET-CT, (111)In-octreotide SPECT-CT and CI. Histopathology, CI and biochemical/clinical/imaging follow-up were used as the reference standard...
April 20, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28424236/hyalinizing-trabecular-tumour-of-the-thyroid-fine-needle-aspiration-cytological-diagnosis-and-correlation-with-histology
#16
REVIEW
Chiara Saglietti, Simonetta Piana, Stefano La Rosa, Massimo Bongiovanni
Hyalinizing trabecular tumour (HTT) is a rare thyroid neoplasm of follicular cell origin characterised by a trabecular growth pattern and prominent intratrabecular and intertrabecular hyalinisation. These peculiar histological features allow the prompt recognition of this neoplasm in surgical specimens. However, cytological diagnosis of HTT remains elusive and misleading because of overlapping characteristics with other thyroid tumours, particularly papillary thyroid carcinoma (PTC), medullary thyroid carcinoma (MTC) and the newly described non-invasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP)...
April 19, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28420659/very-low-expression-of-pd-l1-in-medullary-thyroid-carcinoma
#17
Massimo Bongiovanni, Caterina Rebecchini, Chiara Saglietti, Jean-Luc Bulliard, Laura Marino, Laurence De Leval, Gerasimos P Sykiotis
Monoclonal antibodies that inhibit the interaction between PD1 and PD-L1 are approved for clinical use in several cancer types, and they are also in clinical trials for additional indications, including thyroid carcinomas. A few papers have reported on PD-L1 expression in thyroid carcinomas, including a recent large study by Ahn et al. in Endocrine-Related Cancer using tissue microarrays on differentiated and anaplastic thyroid carcinoma. However, the expression of PD-L1 in medullary thyroid carcinoma (MTC) has not been reported so far, even though ongoing clinical studies aim to test the effectiveness of checkpoint inhibitors in this rare histotype as well...
April 18, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28411179/clusterin-expression-in-medullary-thyroid-carcinoma-is-inversely-correlated-with-the-presence-of-lymph-node-metastases
#18
Najat Mourra, Malika Bennis, Pierre-Yves Boelle, Beatrix Cochand-Priollet, Marine Lefevre, Charles Lepine, Andre Balaton, Jerzy Klijanienko, Fabrice Menegaux, Frederique Tissier
Clusterin (CLU) is a sulfated glycoprotein implicated in many physiological and pathological processes, including tumorigenesis. Several studies have reported the overexpression of CLU in human neoplasm, examined by immunohistochemistry. However, there is no extensive data on its role in the thyroid. Here we investigate CLU expression in thyroid tumors, and the potential correlation between this expression and clinicopathologic parameters. Immunohistochemistry with Anti-CLU was performed on paraffin sections from 39 thyroid tumors...
April 11, 2017: Human Pathology
https://www.readbyqxmd.com/read/28409442/surgical-management-of-medullary-thyroid-carcinoma
#19
REVIEW
Agathoklis Konstantinidis, Michael Stang, Sanziana A Roman, Julie Ann Sosa
Medullary thyroid cancer (MTC) is a malignant tumor of the parafollicular C cells of the thyroid and comprises only 1-2% of all thyroid cancer cases. Unlike most differentiated thyroid cancer, MTC is associated with a mean survival of 8.6 years and accounts for a disproportionate 8.6% of thyroid cancer deaths. Surgery is the mainstay of treatment for loco-regional disease and the only current means of cure for MTC. The relatively low incidence of MTC has made the comprehensive study of this disease difficult and most research to date has been based largely on single institution, retrospective, and/or non-randomized studies...
April 13, 2017: Updates in Surgery
https://www.readbyqxmd.com/read/28404916/expression-of-hif-1%C3%AE-in-medullary-thyroid-cancer-identifies-a-subgroup-with-poor-prognosis
#20
Lutske Lodewijk, Paul van Diest, Petra van der Groep, Natalie Ter Hoeve, Abbey Schepers, Johannes Morreau, Johannes Bonenkamp, Adriana van Engen-van Grunsven, Schelto Kruijff, Bettien van Hemel, Thera Links, Els Nieveen van Dijkum, Susanne van Eeden, Gerlof Valk, Inne Borel Rinkes, Menno Vriens
BACKGROUND: Medullary thyroid cancer (MTC) comprises only 4% of all thyroid cancers and originates from the parafollicular C-cells. HIF-1α expression has been implied as an indicator of worse prognosis in various solid tumors. However, whether expression of HIF-1α is a prognosticator in MTC remained unclear. Our aim was to evaluate the prognostic value of HIF-1α in patients with MTC. METHODS: All patients with MTC who were operated on between 1988 and 2014 in five tertiary referral centers in The Netherlands were included...
April 25, 2017: Oncotarget
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