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https://www.readbyqxmd.com/read/28341420/brain-metastasization-of-breast-cancer
#1
REVIEW
Tânia Custódio-Santos, Mafalda Videira, Maria Alexandra Brito
Central nervous system metastases have been reported in 15-25% of breast cancer patients, and the incidence is increasing. Moreover, the survival of these patients is generally poor, with reports of a 1-year survival rate of 20%. Therefore, a better knowledge about the determinants of brain metastasization is essential for the improvement of the clinical outcomes. Here, we summarize the current data about the metastatic cascade, ranging from the output of cancer cells from the primary tumour to their colonization in the brain, which involves the epithelial-mesenchymal transition, invasion of mammary tissue, intravasation into circulation, and homing into and extravasation towards the brain...
March 21, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28338432/dual-labeling-with-5-aminolevulinic-acid-and-fluorescein-for-fluorescence-guided-resection-of-high-grade-gliomas-technical-note
#2
Eric Suero Molina, Johannes Wölfer, Christian Ewelt, André Ehrhardt, Benjamin Brokinkel, Walter Stummer
OBJECTIVE Fluorescence guidance with 5-aminolevulinic acid (5-ALA) helps improve resections of malignant gliomas. However, one limitation is the low intensity of blue light for background illumination. Fluorescein has recently been reintroduced into neurosurgery, and novel microscope systems are available for visualizing this fluorochrome, which highlights all perfused tissues but has limited selectivity for tumor detection. Here, the authors investigate a combination of both fluorochromes: 5-ALA for distinguishing tumor and fluorescein for providing tissue fluorescence of adjacent brain tissue...
March 24, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28331262/percutaneous-transhepatic-biliary-drainage-in-the-management-of-post-surgical-biliary-leaks
#3
Bhavesh Popat, Dev Thakkar, Hemant Deshmukh, Krantikumar Rathod
The aim of this study was to evaluate the efficacy of percutaneous transhepatic biliary drainage (PTBD) in the treatment of post-surgical biliary leaks and its efficacy in restoring the integrity of bile ducts. One hundred and fifty-seven patients with a post-surgical biliary leak were treated by means of percutaneous transhepatic biliary drainage. The biliary leak was due to laparoscopic procedures in 114 patients, while 43 patients had postoperative leak following open surgery. Percutaneous transhepatic biliary drainage was performed with an 8- to 10-F catheter, with the side holes positioned proximal to the site of extravasation to divert bile flow away from the leak site...
February 2017: Indian Journal of Surgery
https://www.readbyqxmd.com/read/28330904/autonomous-tnf-is-critical-for-in-vivo-monocyte-survival-in-steady-state-and-inflammation
#4
Yochai Wolf, Anat Shemer, Michal Polonsky, Mor Gross, Alexander Mildner, Simon Yona, Eyal David, Ki-Wook Kim, Tobias Goldmann, Ido Amit, Mathias Heikenwalder, Sergei Nedospasov, Marco Prinz, Nir Friedman, Steffen Jung
Monocytes are circulating mononuclear phagocytes, poised to extravasate to sites of inflammation and differentiate into monocyte-derived macrophages and dendritic cells. Tumor necrosis factor (TNF) and its receptors are up-regulated during monopoiesis and expressed by circulating monocytes, as well as effector monocytes infiltrating certain sites of inflammation, such as the spinal cord, during experimental autoimmune encephalomyelitis (EAE). In this study, using competitive in vitro and in vivo assays, we show that monocytes deficient for TNF or TNF receptors are outcompeted by their wild-type counterpart...
March 22, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28329470/cutaneous-manifestations-of-disseminated-gonococcemia
#5
Surget V Beatrous, Stratton B Grisoli, Ryan R Riahi, Ryan J Matherne, Ryan J Matherne
BACKGROUND: Sexually transmitted infections, includingurogenital gonorrheal infection, are a growing healthconcern in the United States. Nearly 50% of cervicalinfections are asymptomatic. If left undiagnosedand untreated, there is a risk of disseminatedinfection. PURPOSE: To describe an 18-year-old womanpresenting with disseminated gonococcal infectionconfirmed by blood cultures, skin biopsy, and urinegonococcal probe. We also describe the presentation,diagnosis, and treatment of disseminated gonococcalinfection, including discussion of the variousmorphologies of cutaneous lesions that have beenreported in the literature...
January 15, 2017: Dermatology Online Journal
https://www.readbyqxmd.com/read/28327608/kdm4b-histone-demethylase-and-g9a-regulate-expression-of-vascular-adhesion-proteins-in-cerebral-microvessels
#6
Ji-Young Choi, Sang-Sun Yoon, Sang-Eun Kim, Sangmee Ahn Jo
Intercellular adhesion molecule 1 (ICAM1) mediates the adhesion and transmigration of leukocytes across the endothelium, promoting inflammation. We investigated the epigenetic mechanism regulating ICAM1 expression. The pro-inflammatory cytokine TNF-α dramatically increased ICAM1 mRNA and protein levels in human brain microvascular endothelial cells and mouse brain microvessels. Chromatin immunoprecipitation revealed that TNF-α reduced methylation of histone H3 at lysines 9 and 27 (H3K9 and H3K27), well-known residues involved in gene suppression...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28323589/preventing-high-altitude-cerebral-edema-in-rats-with-repurposed-anti-angiogenesis-pharmacotherapy
#7
Samantha Tarshis, Joanne Maltzahn, Zoe Loomis, David C Irwin
BACKGROUND: High altitude cerebral edema (HACE) is a fulminant, deadly, and yet still unpredictable brain disease. A new prophylactic treatment for HACE and its predecessor, acute mountain sickness (AMS), needs to be developed without the contraindications or adverse effect profiles of acetazolamide and dexamethasone. Since neovascularization signals are likely key contributors to HACE/AMS, our approach was to examine already existing anti-angiogenic drugs to inhibit potential initiating HACE pathway(s)...
December 1, 2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28322979/3-4-methylenedioxymethamphetamine-mdma-ecstasy-produces-edema-due-to-bbb-disruption-induced-by-mmp-9-activation-in-rat-hippocampus
#8
Mercedes Pérez-Hernández, María Encarnación Fernández-Valle, Ana Rubio-Araiz, Rebeca Vidal, María Dolores Gutiérrez-López, Esther O'Shea, María Isabel Colado
The recreational drug of abuse, 3,4-methylenedioxymethamphetamine (MDMA, ecstasy) disrupts blood-brain barrier (BBB) integrity in rats through an early P2X7 receptor-mediated event which induces MMP-9 activity. Increased BBB permeability often causes plasma proteins and water to access cerebral tissue leading to vasogenic edema formation. The current study was performed to examine the effect of a single neurotoxic dose of MDMA (12.5 mg/kg, i.p.) on in vivo edema development associated with changes in the expression of the perivascular astrocytic water channel, AQP4, as well as in the expression of the tight-junction (TJ) protein, claudin-5 and Evans Blue dye extravasation in the hippocampus of adult male Dark Agouti rats...
March 16, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28322975/a-polymeric-micelle-magnetic-resonance-imaging-mri-contrast-agent-reveals-blood-brain-barrier-bbb-permeability-for-macromolecules-in-cerebral-ischemia-reperfusion-injury
#9
Kouichi Shiraishi, Zuojun Wang, Daisuke Kokuryo, Ichio Aoki, Masayuki Yokoyama
Blood-brain barrier (BBB) opening is a key phenomenon for understanding ischemia-reperfusion injuries that are directly linked to hemorrhagic transformation. The recombinant human tissue-type plasminogen activator (rtPA) increases the risk of symptomatic intracranial hemorrhages. Recent imaging technologies have advanced our understanding of pathological BBB disorders; however, an ongoing challenge in the pre-"rtPA treatment" stage is the task of developing a rigorous method for hemorrhage-risk assessments...
March 16, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28322389/alteration-of-pancreatic-carcinoma-and-promyeloblastic-cell-adhesion-in-liver-microvasculature-by-co-culture-of-hepatocytes-hepatic-stellate-cells-and-endothelial-cells-in-a-physiologically-relevant-model
#10
Mathieu Danoy, Marie Shinohara, Astia Rizki-Safitri, Dominique Collard, Vincent Senez, Yasuyuki Sakai
In vitro models of the liver microvasculature, especially with respect to cancer cell extravasation, should include not only endothelial and cancer cells but also surrounding cells to mimic the physiological situation. To this end, in the present study, we established a physiologically-relevant hierarchical co-culture model by stacking layers of primary rat hepatocytes (Hep), hepatic stellate cells embedded in collagen gel (LX-2) and endothelial cells (HUVECs) on a specially designed oxygen-permeable polydimethylsiloxane PDMS bottom plate...
March 21, 2017: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/28322181/epithelial-mesenchymal-and-hybrid-epithelial-mesenchymal-phenotypes-and-their-clinical-relevance-in-cancer-metastasis
#11
Minal Garg
Cancer metastasis occurs through local invasion of circulating tumour cells (CTCs), intravasation, transportation to distant sites, and their extravasation followed by colonisation at secondary sites. Epithelial-mesenchymal transition (EMT) is a normal developmental phenomenon, but its aberrant activation confers tumour cells with enhanced cell motility, metastatic properties, resistant to therapies and cancer stem cell (CSC) phenotype in epithelium-derived carcinoma. Experimental studies from various research papers have been reviewed to determine the factors, which interlink cancer stemness and cellular plasticity with EMT...
March 21, 2017: Expert Reviews in Molecular Medicine
https://www.readbyqxmd.com/read/28316141/dasatinib-inhibits-actin-fiber-reorganization-and-promotes-endothelial-cell-permeability-through-rhoa-rock-pathway
#12
Swapan K Dasgupta, Anhquyen Le, K Vinod Vijayan, Perumal Thiagarajan
Treatment with dasatinib, a tyrosine kinase inhibitor, is associated with edema, pleural effusion, and pulmonary edema. We investigated the effect of dasatinib on the barrier function of human microvascular endothelial cells-1 (HMEC-1) in vitro and in vivo. The permeability of HMEC-1 to fluorescein isothiocyante (FITC)-dextran increased in Transwell chambers within 5 min following the addition of therapeutic concentrations of dasatinib. The change in permeability was associated with increased activation of RhoA GTPase and its effector Rho-associated coiled-coil kinase 1(ROCK1)...
March 18, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28316123/the-msc-adhesion-cascade-insights-into-homing-and-transendothelial-migration
#13
Franziska Nitzsche, Claudia Müller, Barbara Lukomska, Jukka Jolkkonen, Alexander Deten, Johannes Boltze
Mesenchymal stem cells (MSC) are promising candidates for adult cell therapies in regenerative medicine. To fully exert their potential, efficient homing and migration towards lesion sites plays an important role. Local transplantation deposits MSC in spatial proximity to the lesion, but often requires invasive procedures. Systemic administration routes are favored, but require the targeted extravasation of the circulating MSC at the site of injury. Transplanted MSC can indeed leave the blood flow and transmigrate through the endothelial barrier, and reach the lesion site...
March 18, 2017: Stem Cells
https://www.readbyqxmd.com/read/28315783/role-of-protein-glycosylation-in-cancer-metastasis
#14
REVIEW
Leticia Oliveira-Ferrer, Karen Legler, Karin Milde-Langosch
Although altered glycosylation has been detected in human cancer cells decades ago, only investigations in the last years have enormously increased our knowledge about the details of protein glycosylation and its role in tumour progression. Many proteins, which are heavily glycosylated, i.e. adhesion proteins or proteases, play an important role in cancer metastasis that represents the crucial and frequently life-threatening step in progression of most tumour types. Compared to normal tissue, tumour cells often show altered glycosylation patters with appearance of new tumour-specific antigens...
March 15, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/28306544/acute-ischemic-stroke-mimicking-subarachnoid-hemorrhage-after-coronary-angioplasty
#15
Ana Pršić, Tomislav Šipić, Krešimr Štambuk, Hrvoje Budinčević
Use of non-ionic contrast media (CM) in coronary arteriography has been reported to cause transient cortical blindness, confusion, amnesia and very rare focal deficits. We report a 69-year old patient with stabile angina pectoris who underwent coronary angioplasty with stent placement due to in-stent thrombosis of the right coronary artery who developed stroke symptoms with radiological suspicion of subarachnoid hemorrhage. No vascular malformations were detected on CT cerebral angiography. Dual antiplatelet treatment was continued...
March 16, 2017: Romanian Journal of Internal Medicine, Revue Roumaine de Médecine Interne
https://www.readbyqxmd.com/read/28303300/consequences-of-radiopharmaceutical-extravasation-and-therapeutic-interventions-a-systematic-review
#16
REVIEW
Jochem van der Pol, Stefan Vöö, Jan Bucerius, Felix M Mottaghy
PURPOSE: Radiopharmaceutical extravasation can potentially lead to severe soft tissue damage, but little is known about incidence, medical consequences, possible interventions, and effectiveness of these. The aims of this study are to estimate the incidence of extravasation of diagnostic and therapeutic radiopharmaceuticals, to evaluate medical consequences, and to evaluate medical treatment applied subsequently to those incidents. METHODS: A sensitive and elaborate literature search was performed in Embase and PubMed using the keywords "misadministration", "extravasation", "paravascular infiltration", combined with "tracer", "radionuclide", "radiopharmaceutical", and a list of keywords referring to clinically used tracers (i...
March 16, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28300869/e-selectin-inhibition-with-gmi-1271-decreases-venous-thrombosis-without-profoundly-affecting-tail-vein-bleeding-in-a-mouse-model
#17
Dorian L Culmer, Misha L Dunbar, Angela E Hawley, Suman Sood, Robert E Sigler, Peter K Henke, Thomas W Wakefield, John L Magnani, Daniel D Myers
Selectins, such as E-selectin (CD62E), function in venous thrombosis by binding and activating immune cells to initiate the coagulation cascade. GMI-1271 is a small molecule antagonist that inhibits E-selectin activity. Here we determine whether inhibition of E-selectin is sufficient to decrease acute venous thrombosis and associated inflammatory events in both prophylactic and treatment protocols without significantly affecting haemostasis. Male C57BL/6 mice underwent surgery for experimental thrombosis induction and were harvested at peak thrombus formation in our animal model, two days post induction...
March 16, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28299902/when-metastasis-spns-out-of-control-coverage-of-genome-wide-in-vivo-screen-identifies-novel-host-regulators-of-metastatic-colonization
#18
Marie R Webster, Curtis H Kugel, Ashani T Weeraratna
Metastasis is the major cause of death from cancer in patients. Invasive tumor cells that leave the primary tumor must undergo a strenuous journey including extravasation, survival in the blood, intravasation into the distal site, and proliferation in a new microenvironment to form metastatic colonies. The tumor cells that are successful in forming colonies have dodged multiple perils including evading immune defenses and oxidative stress in the circulatory system. This article is protected by copyright. All rights reserved...
March 16, 2017: Pigment Cell & Melanoma Research
https://www.readbyqxmd.com/read/28299776/toll-like-receptors-elicit-different-recruitment-kinetics-of-monocytes-and-neutrophils-in-mouse-acute-inflammation
#19
Beat A Imhof, Stephane Jemelin, Yalin Emre
Leukocyte recruitment is an important process in combatting pathogens. The largest class of circulating leukocytes are neutrophils, which rapidly invade inflamed tissue, followed by inflammatory Ly6C(+) monocytes. Ly6C(low) monocytes patrol the endothelial wall routinely in the steady state. We recently reported early luminal recruitment of Ly6C(low) monocytes, which preceded and orchestrated neutrophil arrival and extravasation in response to TLR7/8-mediated vascular inflammation. Here we dissected the kinetics of recruitment of monocytes and neutrophils and examined the dynamics of Ly6C(low) monocytes in response to several other Toll-like receptor (TLR) agonists, using intravital confocal microscopy...
March 16, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28298969/gastric-blunt-traumatic-injuries-a-computed-tomography-grading-classification
#20
Antonio Solazzo, Giulia Lassandro, Francesco Lassandro
AIM: To produce a radiological grading of gastric traumatic injuries. METHODS: In our study, we retrospectively analyzed 32 cases of blunt gastric traumatic injuries and compared computed tomography (CT) data with patients' surgical or medical development. In all cases, a basal phase was acquired, and an intravenous contrast material was administered via an antecubital venous catheter with acquisition in the venous phase (70-90 s). In addition, a further set of delayed scans was performed 4-5 min after the first scanning session, without supplementary intravenous contrast material, to identify or better define areas of active bleeding...
February 28, 2017: World Journal of Radiology
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