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https://www.readbyqxmd.com/read/28075031/angiotropic-syringomatous-carcinoma
#1
Eri Katayama, Hiroshi Saruta, Aya Nanri, Takekuni Nakama, Chika Ohata
Syringomatous carcinoma (SC) is a slow-growing malignant skin tumor that usually affects the face or scalp. An 83-year-old female developed SC on the sole, a rare location. Histopathologically, numerous ducts with few keratinizing cysts were seen in the upper dermis, and cords, strands, and nests with sclerotic stroma were seen in the deep dermis and subcutis. In addition to the perineural and intraneural invasion of the tumor, the tumor cells had also invaded the vessel walls. There was no intravasation of tumor cells or interruption of the endothelium...
January 11, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28066805/evaluation-of-soft-tissue-sarcoma-response-to-preoperative-chemoradiotherapy-using-dynamic-contrast-enhanced-magnetic-resonance-imaging
#2
Wei Huang, Brooke R Beckett, Alina Tudorica, Janelle M Meyer, Aneela Afzal, Yiyi Chen, Atiya Mansoor, James B Hayden, Yee-Cheen Doung, Arthur Y Hung, Megan L Holtorf, Torrie J Aston, Christopher W Ryan
This study aims to assess the utility of quantitative dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) parameters in comparison with imaging tumor size for early prediction and evaluation of soft tissue sarcoma response to preoperative chemoradiotherapy. In total, 20 patients with intermediate- to high-grade soft tissue sarcomas received either a phase I trial regimen of sorafenib + chemoradiotherapy (n = 8) or chemoradiotherapy only (n = 12), and underwent DCE-MRI at baseline, after 2 weeks of treatment with sorafenib or after the first chemotherapy cycle, and after therapy completion...
December 2016: Tomography: a Journal for Imaging Research
https://www.readbyqxmd.com/read/27979841/modeling-alveolar-soft-part-sarcoma-unveils-novel-mechanisms-of-metastasis
#3
Miwa Tanaka, Mizuki Homme, Yukari Yamazaki, Rikuka Shimizu, Yutaka Takazawa, Takuro Nakamura
Alveolar soft part sarcoma (ASPS) is a slowly-growing but highly metastatic sarcoma that affects adolescents and young adults. Its characteristic alveolar structure is constituted by tumor cell nests and an abundant vascular network that is responsible for metastatic activities at the initial stage. Here we have generated a new ex vivo mouse model for ASPS that well recapitulates associated angiogenic and metastatic phenotypes. In mouse ASPS, the tumor cells frequently showed tumor intravasation with the intravascular tumor cells presenting as organoid structures covered with hemangiopericytes, which is also observed in human ASPS...
December 15, 2016: Cancer Research
https://www.readbyqxmd.com/read/27974798/mechanism-of-early-dissemination-and-metastasis-in-her2-mammary-cancer
#4
Kathryn L Harper, Maria Soledad Sosa, David Entenberg, Hedayatollah Hosseini, Julie F Cheung, Rita Nobre, Alvaro Avivar-Valderas, Chandandaneep Nagi, Nomeda Girnius, Roger J Davis, Eduardo F Farias, John Condeelis, Christoph A Klein, Julio A Aguirre-Ghiso
Metastasis is the leading cause of cancer-related deaths; metastatic lesions develop from disseminated cancer cells (DCCs) that can remain dormant. Metastasis-initiating cells are thought to originate from a subpopulation present in progressed, invasive tumours. However, DCCs detected in patients before the manifestation of breast-cancer metastasis contain fewer genetic abnormalities than primary tumours or than DCCs from patients with metastases. These findings, and those in pancreatic cancer and melanoma models, indicate that dissemination might occur during the early stages of tumour evolution...
December 14, 2016: Nature
https://www.readbyqxmd.com/read/27935881/-contrast-free-mr-phlebography-as-a-method-of-screening-of-phlebothromboses-and-extravasal-compression-of-the-inferior-vena-cava-and-its-basin
#5
V V Shebryakov, G G Karmazanovsky, Yu M Stoiko, K V Mazaishvili, D K Lyutarevich, S Yu Kim, M V Fel'dsherov, M N Yashkin
The study was aimed at assessing possibilities and determining diagnostic significance of the method of contrast-free magnetic resonance phlebography (MR phlebography) in diagnosis of diseases of the inferior vena cava (IVC) and its basin. Presented herein is experience with examining a total of 74 patients at two therapeutic-diagnostic facilities: the National Medical Surgical Centre named after N.I. Pirogov and the Medical Diagnostic Centre "Ramsey Diagnostics". The studies were carried out on magnetic resonance tomographs "Philips Intera Nova" and "GE Optima MR360", using a special protocol of contrast-free MR-phlebography in consequences at free breathing, followed by 3D reconstruction and processing of the obtained images as MIP and 3D...
2016: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/27901093/macrophage-dependent-tumor-cell-transendothelial-migration-is-mediated-by-notch1-mena-inv-initiated-invadopodium-formation
#6
Jeanine Pignatelli, Jose Javier Bravo-Cordero, Minna Roh-Johnson, Saumil J Gandhi, Yarong Wang, Xiaoming Chen, Robert J Eddy, Alice Xue, Robert H Singer, Louis Hodgson, Maja H Oktay, John S Condeelis
The process of intravasation involving transendothelial migration is a key step in metastatic spread. How the triple cell complex composed of a macrophage, Mena over-expressing tumor cell and endothelial cell, called the tumor microenvironment of metastasis (TMEM), facilitates tumor cell transendothelial migration is not completely understood. Previous work has shown that the physical contact between a macrophage and tumor cell results in the formation of invadopodia, actin-rich matrix degrading protrusions, important for tumor cell invasion and transendothelial migration and tumor cell dissemination...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27900398/-dyspnea-and-skin-rash-in-a-49-year-old-male-patient
#7
I El-Battrawy, U Ansari, M Behnes, W Kirschstein, S Britsch, C Jabbour, C Fastner, V Bill, M Borggrefe, I Akin
We report on the case of a 49-year-old man who presented with increasing dyspnea and a skin rash. The community-acquired pneumonia was initially treated with broad spectrum antibiotics. The patient's respiratory condition rapidly worsened and the clinical picture of Waterhouse-Friderichsen syndrome developed with disseminated intravasal coagulopathy and necrosis of the toes. An infection with Capnocytophaga canimorsus, which had been caused by an initially unmentioned dog bite was confirmed. In view of the fulminant course and the high risk of operative treatment of the ubiquitous necroses in all limbs, a joint decision for deescalation of therapy was made together with relatives...
November 29, 2016: Der Internist
https://www.readbyqxmd.com/read/27891193/in-epithelial-cancers-aberrant-col17a1-promoter-methylation-predicts-its-misexpression-and-increased-invasion
#8
Pulari U Thangavelu, Tibor Krenács, Eloise Dray, Pascal H G Duijf
BACKGROUND: Metastasis is a leading cause of death among cancer patients. In the tumor microenvironment, altered levels of extracellular matrix proteins, such as collagens, can facilitate the first steps of cancer cell metastasis, including invasion into surrounding tissue and intravasation into the blood stream. However, the degree of misexpression of collagen genes in tumors remains understudied, even though this knowledge could greatly facilitate the development of cancer treatment options aimed at preventing metastasis...
2016: Clinical Epigenetics
https://www.readbyqxmd.com/read/27866851/inhibition-of-the-glycolytic-activator-pfkfb3-in-endothelium-induces-tumor-vessel-normalization-impairs-metastasis-and-improves-chemotherapy
#9
Anna Rita Cantelmo, Lena-Christin Conradi, Aleksandra Brajic, Jermaine Goveia, Joanna Kalucka, Andreas Pircher, Pallavi Chaturvedi, Johanna Hol, Bernard Thienpont, Laure-Anne Teuwen, Sandra Schoors, Bram Boeckx, Joris Vriens, Anna Kuchnio, Koen Veys, Bert Cruys, Lise Finotto, Lucas Treps, Tor Espen Stav-Noraas, Francesco Bifari, Peter Stapor, Ilaria Decimo, Kim Kampen, Katrien De Bock, Guttorm Haraldsen, Luc Schoonjans, Ton Rabelink, Guy Eelen, Bart Ghesquière, Jalees Rehman, Diether Lambrechts, Asrar B Malik, Mieke Dewerchin, Peter Carmeliet
Abnormal tumor vessels promote metastasis and impair chemotherapy. Hence, tumor vessel normalization (TVN) is emerging as an anti-cancer treatment. Here, we show that tumor endothelial cells (ECs) have a hyper-glycolytic metabolism, shunting intermediates to nucleotide synthesis. EC haplo-deficiency or blockade of the glycolytic activator PFKFB3 did not affect tumor growth, but reduced cancer cell invasion, intravasation, and metastasis by normalizing tumor vessels, which improved vessel maturation and perfusion...
December 12, 2016: Cancer Cell
https://www.readbyqxmd.com/read/27866519/-role-of-fucosylation-in-cancer
#10
Kun Zhang, Hong Wang
Fucosylation is one of the most important glycosylation in mamal, involving biosynthesis of blood H antigen and Lewis antigen, selectin mediated intravasion and homing of leukocyte, host-microbe interactions, modification of signaling. Alterations in the expression of fucosylated oligosaccharides have been observed in several cancer, playing a role in proliferation, invasion, metastasis, immune escape and drug-sensitiity, especially in lung cancer. Targeting the abnormality of fucosylaion in cancer will become a new strategy...
November 20, 2016: Zhongguo Fei Ai za Zhi, Chinese Journal of Lung Cancer
https://www.readbyqxmd.com/read/27845510/outcomes-of-monopolar-versus-bipolar-endometrial-ablation-on-uterine-bleeding-and-psychophysical-wellbeing
#11
Pasquale De Franciscis, Flavio Grauso, Luigi Cobellis, Enrico M Messalli, Gaspare Cucinella, Antonino Perino, Nicola Colacurci, Marco Torella
PURPOSE: to compare outcomes of endometrial ablation with monopolar versus bipolar resection on uterine bleeding and psychophysical wellbeing. METHODS: In a prospective randomized study, 100 peri-menopausal patients, without desire of pregnancy and with no response to pharmacological treatment, underwent endometrial ablation from 2012 to 2014. They were randomly divided in two groups: 50 patients treated with monopolar electrode resection loop (group A) and 50 patients treated with bipolar electrode resection loop (group B)...
November 15, 2016: Minerva Ginecologica
https://www.readbyqxmd.com/read/27824079/mena-inv-dysregulates-cortactin-phosphorylation-to-promote-invadopodium-maturation
#12
Maxwell D Weidmann, Chinmay R Surve, Robert J Eddy, Xiaoming Chen, Frank B Gertler, Ved P Sharma, John S Condeelis
Invadopodia, actin-based protrusions of invasive carcinoma cells that focally activate extracellular matrix-degrading proteases, are essential for the migration and intravasation of tumor cells during dissemination from the primary tumor. We have previously shown that cortactin phosphorylation at tyrosine residues, in particular tyrosine 421, promotes actin polymerization at newly-forming invadopodia, promoting their maturation to matrix-degrading structures. However, the mechanism by which cells regulate the cortactin tyrosine phosphorylation-dephosphorylation cycle at invadopodia is unknown...
November 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27815674/epithelial-plasticity-during-human-breast-morphogenesis-and-cancer-progression
#13
REVIEW
Saevar Ingthorsson, Eirikur Briem, Jon Thor Bergthorsson, Thorarinn Gudjonsson
Understanding the complex events leading to formation of an epithelial-based organ such as the breast requires a detailed insight into the crosstalk between epithelial and stromal compartments. These interactions occur both through heterotypic cellular interactions and between cells and matrix components. While in vivo models may partially capture these complex interactions, there is a need for in- vitro models to study these events. In this review we discuss cell-cell interactions in breast development focusing on the stem cell niche and branching morphogenesis...
December 2016: Journal of Mammary Gland Biology and Neoplasia
https://www.readbyqxmd.com/read/27799782/cancer-fundamentals-behind-ph-targeting-and-the-double-edged-approach
#14
Tomas Koltai
The highly regulated pH of cells and the less-regulated pH of the surrounding extracellular matrix (ECM) is the result of a delicate balance between metabolic processes and proton production, proton transportation, chemical buffering, and vascular removal of waste products. Malignant cells show a pronounced increase in metabolic processes where the 10- to 15-fold rise in glucose consumption is only the tip of the iceberg. Aerobic glycolysis (Warburg effect) is one of the hallmarks of cancer metabolism that implies excessive production of protons, which if stayed inside the cells would result in fatal intracellular acidosis (maintaining a strict acid-base balance is essential for the survival of eukaryotic cells)...
2016: OncoTargets and Therapy
https://www.readbyqxmd.com/read/27790387/direct-visualization-of-the-phenotype-of-hypoxic-tumor-cells-at-single-cell-resolution-in-vivo-using-a-new-hypoxia-probe
#15
Yarong Wang, Haoxuan Wang, Jiufeng Li, David Entenberg, Alice Xue, Weigang Wang, John Condeelis
Tumor hypoxia is linked to tumor progression, metastasis, and therapy resistance. However, the underlying mechanisms behind this linkage are not fully understood. Here we present a novel fluorescent mCherry hypoxia-responsive marker that can be used in real time imaging to specifically and sensitively identify hypoxic cells in vivo at single cell resolution. Tumors derived from triple negative tumor cells expressing the hypoxia marker reveal that the hypoxic tumor cells congregate near flowing blood vessels...
2016: IntraVital
https://www.readbyqxmd.com/read/27677308/ahr-cyp1a1-interplay-triggers-lymphatic-barrier-breaching-in-breast-cancer-spheroids-by-inducing-12-s-hete-synthesis
#16
Chi Huu Nguyen, Stefan Brenner, Nicole Huttary, Atanas Georgiev Atanasov, Verena Maria Dirsch, Waranya Chatuphonprasert, Sivio Holzner, Serena Stadler, Juliane Riha, Sigurd Krieger, Rainer de Martin, Zsuzsanna Bago-Horvath, Georg Krupitza, Walter Jäger
A causal link between overexpression of aryl hydrocarbon receptor (AHR) and its target cytochrome P450 1A1 (CYP1A1) and metastatic outgrowth of various cancer entities has been established. Nevertheless, the mechanism how AHR/CYP1A1 support metastasis formation is still little understood. In vitro we discovered a potential mechanism facilitating tumour dissemination based on the production of 12(S)-hydroxyeicosatetraenoic acid (12(S)-HETE). Utilising a three-dimensional lymph endothelial cell (LEC) monolayer & MDA-MB231 breast cancer cell spheroid co-culture model in combination with knock-down approach allowed elucidation of the molecular/biochemical basis of AHR/CYP1A1-induced tumour breaching through the LEC barrier...
September 27, 2016: Human Molecular Genetics
https://www.readbyqxmd.com/read/27663743/oriented-collagen-fibers-direct-tumor-cell-intravasation
#17
Weijing Han, Shaohua Chen, Wei Yuan, Qihui Fan, Jianxiang Tian, Xiaochen Wang, Longqing Chen, Xixiang Zhang, Weili Wei, Ruchuan Liu, Junle Qu, Yang Jiao, Robert H Austin, Liyu Liu
In this work, we constructed a Collagen I-Matrigel composite extracellular matrix (ECM). The composite ECM was used to determine the influence of the local collagen fiber orientation on the collective intravasation ability of tumor cells. We found that the local fiber alignment enhanced cell-ECM interactions. Specifically, metastatic MDA-MB-231 breast cancer cells followed the local fiber alignment direction during the intravasation into rigid Matrigel (∼10 mg/mL protein concentration).
October 4, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27642620/dataset-on-fap-induced-emergence-of-spontaneous-metastases-and-on-the-preparation-of-activatable-fap-targeting-immunoliposomes-to-detect-the-metastases
#18
Felista L Tansi, Ronny Rüger, Claudia Böhm, Roland E Kontermann, Ulf K Teichgraeber, Alfred Fahr, Ingrid Hilger
The underlying data demonstrates that fibroblast activation protein (FAP) paves the way for fibrosarcoma cells, which require the proteolysis of the extracellular matrix (ECM) and basement membranes to intravasate from implanted subcutaneous primary tumors into blood vessels, be transported to distant organs where they extravasate from the blood vessels, reattach and proliferate to metastases. The data additionally shows that FAP, when overexpressed on fibrosarcoma cells induces their invasion and formation of spontaneous metastases in multiple organs, particularly after subcutaneous co-implantation of the FAP-expressing and wildtype fibrosarcoma...
December 2016: Data in Brief
https://www.readbyqxmd.com/read/27635044/endosialin-expressing-pericytes-promote-metastatic-dissemination
#19
Carmen Viski, Courtney König, Magdalena Kijewska, Carolin Mogler, Clare M Isacke, Hellmut G Augustin
Metastasis is a multistep process that is critically dependent on the interaction of metastasizing tumor cells with cells in the local microenvironment. Within this tumor stroma, vessel-associated pericytes and myofibroblasts share a number of traits, including the upregulated expression of the transmembrane receptor endosialin (CD248). Comparative experiments in wild-type and endosialin-deficient mice revealed that stromal endosialin does not affect primary tumor growth but strongly promotes spontaneous metastasis...
September 15, 2016: Cancer Research
https://www.readbyqxmd.com/read/27621568/changes-in-cellular-mechanical-properties-during-onset-or-progression-of-colorectal-cancer
#20
REVIEW
Gabriele Ciasca, Massimiliano Papi, Eleonora Minelli, Valentina Palmieri, Marco De Spirito
Colorectal cancer (CRC) development represents a multistep process starting with specific mutations that affect proto-oncogenes and tumour suppressor genes. These mutations confer a selective growth advantage to colonic epithelial cells that form first dysplastic crypts, and then malignant tumours and metastases. All these steps are accompanied by deep mechanical changes at the cellular and the tissue level. A growing consensus is emerging that such modifications are not merely a by-product of the malignant progression, but they could play a relevant role in the cancer onset and accelerate its progression...
August 28, 2016: World Journal of Gastroenterology: WJG
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