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https://www.readbyqxmd.com/read/28506408/genetics-of-medullary-thyroid-cancer-an-overview
#1
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/28475408/vandetanib-and-cabozantinib-potentiate-mitochondria-targeted-agents-to-suppress-medullary-thyroid-carcinoma-cells
#2
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/28447912/targeting-ret-in-patients-with-ret-rearranged-lung-cancers-results-from-the-global-multicenter-ret-registry
#3
Oliver Gautschi, Julie Milia, Thomas Filleron, Juergen Wolf, David P Carbone, Dwight Owen, Ross Camidge, Vignhesh Narayanan, Robert C Doebele, Benjamin Besse, Jordi Remon-Masip, Pasi A Janne, Mark M Awad, Nir Peled, Chul-Cho Byoung, Daniel D Karp, Michael Van Den Heuvel, Heather A Wakelee, Joel W Neal, Tony S K Mok, James C H Yang, Sai-Hong Ignatius Ou, Georg Pall, Patrizia Froesch, Gérard Zalcman, David R Gandara, Jonathan W Riess, Vamsidhar Velcheti, Kristin Zeidler, Joachim Diebold, Martin Früh, Sebastian Michels, Isabelle Monnet, Sanjay Popat, Rafael Rosell, Niki Karachaliou, Sacha I Rothschild, Jin-Yuan Shih, Arne Warth, Thomas Muley, Florian Cabillic, Julien Mazières, Alexander Drilon
Purpose In addition to prospective trials for non-small-cell lung cancers (NSCLCs) that are driven by less common genomic alterations, registries provide complementary information on patient response to targeted therapies. Here, we present the results of an international registry of patients with RET-rearranged NSCLCs, providing the largest data set, to our knowledge, on outcomes of RET-directed therapy thus far. Methods A global, multicenter network of thoracic oncologists identified patients with pathologically confirmed NSCLC that harbored a RET rearrangement...
May 1, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28435794/cushing-disease-in-a-patient-with-multiple-endocrine-neoplasia-type-2b
#4
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/28428205/measurable-supratentorial-white-matter-volume-changes-in-patients-with-diffuse-intrinsic-pontine-glioma-treated-with-an-anti-vascular-endothelial-growth-factor-agent-steroids-and-radiation
#5
P Svolos, W E Reddick, A Edwards, A Sykes, Y Li, J O Glass, Z Patay
BACKGROUND AND PURPOSE: Assessing the response to treatment in infiltrative brain tumors by using lesion volume-based response criteria is challenging. We hypothesized that in such tumors, volume measurements alone may not accurately capture changes in actual tumor burden during treatment. We longitudinally evaluated volume changes in both normal-appearing supratentorial white matter and the brain stem lesions in patients treated for diffuse intrinsic pontine glioma to determine to what extent adjuvant systemic therapies may skew the accuracy of tumor response assessments based on volumetric analysis...
April 20, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28413487/vandetanib-and-adam-inhibitors-synergistically-attenuate-the-pathological-migration-of-ebv-infected-retinal-pigment-epithelial-cells-by-regulating-the-vegf-mediated-mapk-pathway
#6
Daejin Kim, Hyun-Suk Ko, Ga Bin Park, Dae Young Hur, Yeong Seok Kim, Jae Wook Yang
The extracellular signals induced by vascular endothelial growth factor (VEGF) are implicated in choroidal neovascularization (CNV) and thus, are associated with vision-limiting complications in the human retina. Vandetanib is an oral anticancer drug that selectively inhibits the activities of VEGF receptor and epidermal growth factor receptor tyrosine kinase; however, the effects of vandetanib on VEGF in retinal pigment epithelial (RPE) cells have not yet been studied. In the present study, a combined treatment of vandetanib and a disintegrin and metalloproteinase (ADAM) protein inhibitors were used to assess the regulation of Epstein-Barr virus (EBV)-infected ARPE19 cells (ARPE19/EBV) migration as a model of CNV...
April 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28413233/an-alternative-synthesis-of-vandetanib-caprelsa%C3%A2-via-a-microwave-accelerated-dimroth-rearrangement
#7
Kayleigh L Brocklesby, Jennifer S Waby, Chris Cawthorne, Graham Smith
Vandetanib is an orally available tyrosine kinase inhibitor used in the treatment of cancer. The current synthesis proceeds via an unstable 4-chloroquinazoline, using harsh reagents, in addition to requiring sequential protection and deprotection steps. In the present work, use of the Dimroth rearrangement in the key quinazoline forming step enabled the synthesis of Vandetanib in nine steps (compared to the previously reported 12-14).
April 12, 2017: Tetrahedron Letters
https://www.readbyqxmd.com/read/28392095/real-time-analysis-of-the-binding-of-fluorescent-vegf165a-to-vegfr2-in-living-cells-effect-of-receptor-tyrosine-kinase-inhibitors-and-fate-of-internalized-agonist-receptor-complexes
#8
Laura E Kilpatrick, Rachel Friedman-Ohana, Diana C Alcobia, Kristin Riching, Chloe J Peach, Amanda J Wheal, Stephen J Briddon, Matthew B Robers, Kris Zimmerman, Thomas Machleidt, Keith V Wood, Jeanette Woolard, Stephen J Hill
Vascular endothelial growth factor (VEGF) is an important mediator of angiogenesis. Here we have used a novel stoichiometric protein-labeling method to generate a fluorescent variant of VEGF (VEGF165a-TMR) labeled on a single cysteine within each protomer of the antiparallel VEGF homodimer. VEGF165a-TMR has then been used in conjunction with full length VEGFR2, tagged with the bioluminescent protein NanoLuc, to undertake a real time quantitative evaluation of VEGFR2 binding characteristics in living cells using bioluminescence energy transfer (BRET)...
April 6, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28345929/utility-of-cyp3a4-and-pxr-car-cyp3a4-3a7-transgenic-mouse-models-to-assess-the-magnitude-of-cyp3a4-mediated-drug-drug-interactions
#9
Justin Q Ly, Kirsten Messick, Ann Qin, Ryan H Takahashi, Edna F Choo
Species differences in the expression, activity, regulation, and substrate specificity of metabolizing enzymes preclude the use of animal models to predict clinical drug-drug interactions (DDIs). The objective of this work is to determine if the transgenic (Tg) Cyp3a(-/-)Tg-3A4Hep/Int and Nr1i2/Nr1i3(-/-)-Cyp3a(-/-)Tg-PXR-CAR-3A4/3A7Hep/Int (PXR-CAR-CYP3A4/3A7) mouse models could be used to predict in vivo DDI of 10 drugs; alprazolam, bosutinib, crizotinib, dasatinib, gefitinib, ibrutinib, regorafenib, sorafenib, triazolam, and vandetinib (as victims); with varying magnitudes of reported CYP3A4 clinical DDI...
April 7, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28318881/targeted-therapy-in-thyroid-cancer-state-of-the-art
#10
L Valerio, L Pieruzzi, C Giani, L Agate, V Bottici, L Lorusso, V Cappagli, L Puleo, A Matrone, D Viola, C Romei, R Ciampi, E Molinaro, R Elisei
Thyroid cancer typically has a good outcome following standard treatments, which include surgery, radioactive iodine ablation for differentiated tumours and treatment with thyrotropine hormone-suppressive levothyroxine. Thyroid cancers that persist or recur following these therapies have a poorer prognosis. Cytotoxic chemotherapy or external beam radiotherapy has a low efficacy in these patients. 'Target therapy' with tyrosine kinase inhibitors (TKIs) represent an important therapeutic option for the treatment of advanced cases of radioiodine refractory (RAI-R) differentiated thyroid cancer (DTC), medullary thyroid cancer (MTC) and possibly for cases of poorly differentiated (PDTC) and anaplastic thyroid cancer (ATC)...
March 16, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28259610/vandetanib-plus-gemcitabine-versus-placebo-plus-gemcitabine-in-locally-advanced-or-metastatic-pancreatic-carcinoma-vip-a-prospective-randomised-double-blind-multicentre-phase-2-trial
#11
Gary Middleton, Daniel H Palmer, William Greenhalf, Paula Ghaneh, Richard Jackson, Trevor Cox, Anthony Evans, Victoria E Shaw, Jonathan Wadsley, Juan W Valle, David Propper, Harpreet Wasan, Stephen Falk, David Cunningham, Fareeda Coxon, Paul Ross, Srinivasan Madhusudan, Nick Wadd, Pippa Corrie, Tamas Hickish, Eithne Costello, Fiona Campbell, Charlotte Rawcliffe, John P Neoptolemos
BACKGROUND: Erlotinib is an EGFR tyrosine kinase inhibitor that has shown a significant but only marginally improved median overall survival when combined with gemcitabine in patients with locally advanced and metastatic pancreatic cancer. Vandetanib is a novel tyrosine kinase inhibitor of VEGFR2, RET, and EGFR, all of which are in involved in the pathogenesis of pancreatic cancer. We investigated the clinical efficacy of vandetanib when used in combination with gemcitabine in patients with advanced pancreatic cancer...
April 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28259301/effectiveness-of-antiangiogenic-drugs-in-glioblastoma-patients-a-systematic-review-and-meta-analysis-of-randomized-clinical-trials
#12
REVIEW
Giuseppe Lombardi, Ardi Pambuku, Luisa Bellu, Miriam Farina, Alessandro Della Puppa, Luca Denaro, Vittorina Zagonel
BACKGROUND: glioblastomas are highly vascularized tumors and various antiangiogenic drugs have been investigated in clinical trials showing unclear results. We performed a systematic review and a meta-analysis to clarify and evaluate their effectiveness in glioblastoma patients. PATIENTS AND METHODS: we searched relevant published and unpublished randomized clinical trials analyzing antiangiogenic drugs versus chemotherapy in glioblastoma patients from January 2006 to January 2016 in MEDLINE, WEB of SCIENCE, ASCO, ESMO and SNO databases...
March 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28209747/pediatric-adolescent-and-young-adult-thyroid-carcinoma-harbors-frequent-and-diverse-targetable-genomic-alterations-including-kinase-fusions
#13
Pierre Vanden Borre, Alexa B Schrock, Peter M Anderson, John C Morris, Andreas M Heilmann, Oliver Holmes, Kai Wang, Adrienne Johnson, Steven G Waguespack, Sai-Hong Ignatius Ou, Saad Khan, Kar-Ming Fung, Philip J Stephens, Rachel L Erlich, Vincent A Miller, Jeffrey S Ross, Siraj M Ali
BACKGROUND: Thyroid carcinoma, which is rare in pediatric patients (age 0-18 years) but more common in adolescent and young adult (AYA) patients (age 15-39 years), carries the potential for morbidity and mortality. METHODS: Hybrid-capture-based comprehensive genomic profiling (CGP) was performed prospectively on 512 consecutively submitted thyroid carcinomas, including 58 from pediatric and AYA (PAYA) patients, to identify genomic alterations (GAs), including base substitutions, insertions/deletions, copy number alterations, and rearrangements...
March 2017: Oncologist
https://www.readbyqxmd.com/read/28159923/the-anti-neoplastic-activity-of-vandetanib-against-high-risk-medulloblastoma-variants-is-profoundly-enhanced-by-additional-pi3k-inhibition
#14
Rogerio B Craveiro, Michael Ehrhardt, Julia Velz, Martin Olschewski, Barbara Goetz, Torsten Pietsch, Dagmar Dilloo
Medulloblastoma is comprised of at least four molecular subgroups with distinct clinical outcome (WHO classification 2016). SHH-TP53-mutated as well as MYC-amplified Non-WNT/Non-SHH medulloblastoma show the worst prognosis.Here we present evidence that single application of the multi-kinase inhibitor Vandetanib displays anti-neoplastic efficacy against cell lines derived from high-risk SHH-TP53-mutated and MYC-amplified Non-WNT/Non-SHH medulloblastoma. The narrow target spectrum of Vandetanib along with a favourable toxicity profile renders this drug ideal for multimodal treatment approaches...
January 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/28132823/preparation-and-characterisation-of-vandetanib-eluting-radiopaque-beads-for-locoregional-treatment-of-hepatic-malignancies
#15
Alice Hagan, Gary J Phillips, Wendy M Macfarlane, Andrew W Lloyd, Peter Czuczman, Andrew L Lewis
Since their introduction around a decade ago, embolic drug-eluting beads (DEBs) have become a well-established treatment option for the locoregional transarterial treatment of hepatic malignancies. Despite this success, the therapy is seen to be limited by the choice of drug and more effective options are therefore being sought. These include the small molecule multi-tyrosine kinase inhibitors (MTKi), which exert an anti-angiogenic and anti-proliferative effect that could be highly beneficial in combating some of the unwanted downstream consequences of embolization...
April 1, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28098949/identification-of-cellular-targets-involved-in-cardiac-failure-caused-by-pki-in-oncology-an-approach-combining-pharmacovigilance-and-pharmacodynamics
#16
Emilie Patras de Campaigno, Emmanuelle Bondon-Guitton, Guy Laurent, Francois Montastruc, Jean-Louis Montastruc, Maryse Lapeyre-Mestre, Fabien Despas
AIMS: The aims of the present study were to evaluate the risk of cardiac failure (CF) associated with 15 anticancer protein kinase inhibitors (PKIs) through a case/noncase analysis and to identify which PK(s) and pathways are involved in PKI-induced CF. METHODS: In order to evaluate the risk of CF, adjusted reporting odds ratios (aRORs) were calculated for the 15 anticancer PKIs in the World Health Organization safety report database (VigiBase®). We realised a literature review to identify 21 protein kinases (PKs) that were possibly involved in CF caused by PKIs...
January 18, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28068878/long-term-control-of-hypercortisolism-by-vandetanib-in-a-case-of-medullary-thyroid-carcinoma-with-a-somatic-ret-mutation
#17
Anne-Cécile Paepegaey, Béatrix Cochand-Priollet, Estelle Louiset, Pierre-Olivier Sarfati, Marco Alifano, Nelly Burnichon, Marie Bienvenu-Perrard, Najiba Lahlou, Léopoldine Bricaire, Lionel Groussin
BACKGROUND: Medullary thyroid carcinomas (MTCs) complicated by ectopic Cushing's syndrome (CS) have a poor prognosis, partially due to the difficulty in controlling hypercortisolism by adrenal blocking drugs. Recent reports (including the initial follow-up of this patient) have suggested that tyrosine kinase inhibitors (TKIs) may be a therapeutic option due to an anti-secretory action on ACTH. However, there is a lack of long-term follow-up studies. PATIENT FINDINGS: The case is reported of a 58-year-old man with MTC-related CS resistant to a combination of several anti-cortisolic drugs...
April 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28052652/anti-angiogenic-therapy-in-patients-with-advanced-gastric-and-gastroesophageal-junction-cancer-a-systematic-review
#18
Li-Tzong Chen, Do-Youn Oh, Min-Hee Ryu, Kun-Huei Yeh, Winnie Yeo, Roberto Carlesi, Rebecca Cheng, Jongseok Kim, Mauro Orlando, Yoon-Koo Kang
Despite advancements in therapy for advanced gastric and gastroesophageal junction cancers, their prognosis remains dismal. Tumor angiogenesis plays a key role in cancer growth and metastasis, and recent studies indicate that pharmacologic blockade of angiogenesis is a promising approach to therapy. In this systematic review, we summarize current literature on the clinical benefit of anti-angiogenic agents in advanced gastric cancer. We conducted a systematic search of PubMed and conference proceedings including the American Society of Clinical Oncology, the European Society for Medical Oncology, and the European Cancer Congress...
January 3, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/27986807/effects-of-4-multitargeted-receptor-tyrosine-kinase-inhibitors-on-regional-hemodynamics-in-conscious-freely-moving-rats
#19
Joanne J Carter, Laurice V Fretwell, Jeanette Woolard
VEGF inhibitors, including receptor tyrosine kinase inhibitors, are used as adjunct therapies in a number of cancer treatments. An emerging issue with these drugs is that most cause hypertension. To gain insight into the physiological mechanisms involved, we evaluated their regional hemodynamic effects in conscious rats. Male Sprague Dawley rats (350-450 g) were chronically implanted with pulsed Doppler flow probes (renal and mesenteric arteries, and the descending abdominal aorta) and catheters (jugular vein, peritoneal cavity, and distal abdominal aorta)...
March 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27983649/design-and-synthesis-of-vandetanib-derivatives-containing-nitroimidazole-groups-as-tyrosine-kinase-inhibitors-in-normoxia-and-hypoxia
#20
Huiqiang Wei, Deguan Li, Xiangbo Yang, Haihua Shang, Saijun Fan, Yiliang Li, Dan Song
Sixteen novel epidermal growth factor receptor (EGFR)/vascular endothelial growth factor (VEGF)-2 inhibitors (nitroimidazole-substituted 4-anilinoquinazoline derivatives (16a-p)) were designed and prepared via the introduction of a nitroimidazole group in the piperidine side chain and modification on the aniline moiety of vandetanib. Preliminary biological tests showed that comparing with vandetanib, some target compounds exhibited excellent EGFR inhibitory activities and anti-proliferative over A549/H446 cells in hypoxia...
December 14, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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