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https://www.readbyqxmd.com/read/28212290/defining-clinical-response-criteria-and-early-response-criteria-for-precision-oncology-current-state-of-the-art-and-future-perspectives
#1
Vivek Subbiah, Hubert H Chuang, Dhiraj Gambhire, Kalevi Kairemo
In this era of precision oncology, there has been an exponential growth in the armamentarium of genomically targeted therapies and immunotherapies. Evaluating early responses to precision therapy is essential for "go" versus "no go" decisions for these molecularly targeted drugs and agents that arm the immune system. Many different response assessment criteria exist for use in solid tumors and lymphomas. We reviewed the literature using the Medline/PubMed database for keywords "response assessment" and various known response assessment criteria published up to 2016...
February 15, 2017: Diagnostics
https://www.readbyqxmd.com/read/28212271/carbon-nanotubes-as-an-effective-opportunity-for-cancer-diagnosis-and-treatment
#2
REVIEW
Alessandro Sanginario, Beatrice Miccoli, Danilo Demarchi
Despite the current progresses of modern medicine, the resistance of malignant tumors to present medical treatments points to the necessity of developing new therapeutic approaches. In recent years, numerous studies have focused their attention on the promising use of nanomaterials, like iron oxide nanowires, zinc oxide or mesoporous silica nanoparticles, for cancer and metastasis treatment with the advantage of operating directly at the bio-molecular scale. Among them, carbon nanotubes emerged as valid candidates not only for drug delivery, but also as a valuable tool in cancer imaging and physical ablation...
February 15, 2017: Biosensors
https://www.readbyqxmd.com/read/28211966/formation-of-organometallic-intermediate-states-in-on-surface-ullmann-couplings
#3
Dennis Barton, Hong-Ying Gao, Philipp Alexander Held, Armido Studer, Harald Fuchs, Nikos L Doltsinis, Johannes Neugebauer
Possible origins of the formation of organometallic intermediates in on-surface Ullmann couplings have been investigated by surface tunneling microscopy (STM) and density functional theory (DFT) calculations. We consider the case of iodobenzenes on the coinage metals Au, Ag and Cu. We found experimental evidence for the formation of surface vacancies and the presence of metal adatoms in these coupling reactions, which are taken as a hint for the reactive extraction of surface atoms by adsorbates. In a second step, we demonstrate by ab initio molecular dynamics calculations for aryl-iodides on copper that metal atoms can be pulled out of the surface to form metalorganic species...
February 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28211900/amyloid-%C3%AE-oligomers-interact-with-neurexin-and-diminish-neurexin-mediated-excitatory-presynaptic-organization
#4
Yusuke Naito, Yuko Tanabe, Alfred Kihoon Lee, Edith Hamel, Hideto Takahashi
Alzheimer's disease (AD) is characterized by excessive production and deposition of amyloid-beta (Aβ) proteins as well as synapse dysfunction and loss. While soluble Aβ oligomers (AβOs) have deleterious effects on synapse function and reduce synapse number, the underlying molecular mechanisms are not well understood. Here we screened synaptic organizer proteins for cell-surface interaction with AβOs and identified a novel interaction between neurexins (NRXs) and AβOs. AβOs bind to NRXs via the N-terminal histidine-rich domain (HRD) of β-NRX1/2/3 and alternatively-spliced inserts at splicing site 4 of NRX1/2...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28211619/intravoxel-incoherent-motion-diffusion-weighted-imaging-of-bone-marrow-in-patients-with-acute-myeloid-leukemia-a-pilot-study-of-prognostic-value
#5
Jinliang Niu, Wenjin Li, Hongwei Wang, Wenqi Wu, Tong Gong, Ning Huang, Jun Wang, Yan Qi
PURPOSE: To investigate the value of intravoxel incoherent motion (IVIM) parameters in evaluation of prognosis in patients with acute myeloid leukemia (AML) before treatment. MATERIALS AND METHODS: Fifty-three patients before standard chemotherapy underwent MRI scans at 1.5 Tesla using conventional diffusion weighted imaging (DWI) and IVIM (b = 0, 10, 25, 50, 100, 200, 400, 600, 800, 1000, 1200 s/mm(2) ) in the sagittal plane covering the lumbar bone marrow...
February 17, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28210903/role-of-exchange-protein-directly-activated-by-camp-epac1-in-breast-cancer-cell-migration-and-apoptosis
#6
Naveen Kumar, Sonal Gupta, Surbhi Dabral, Shailja Singh, Seema Sehrawat
Despite the current progress in cancer research and therapy, breast cancer remains the leading cause of mortality among half a million women worldwide. Migration and invasion of cancer cells are associated with prevalent tumor metastasis as well as high mortality. Extensive studies have powerfully established the role of prototypic second messenger cAMP and its two ubiquitously expressed intracellular cAMP receptors namely the classic protein kinaseA/cAMP-dependent protein kinase (PKA) and the more recently discovered exchange protein directly activated by cAMP/cAMP-regulated guanine nucleotide exchange factor (EPAC/cAMP-GEF) in cell migration, cell cycle regulation, and cell death...
February 16, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28210739/retinal-oxidative-stress-at-the-onset-of-diabetes-determined-by-synchrotron-ftir-widefield-imaging-towards-diabetes-pathogenesis
#7
Ebrahim Aboualizadeh, Mahsa Ranji, Christine M Sorenson, Reyhaneh Sepehr, Nader Sheibani, Carol J Hirschmugl
Diabetic retinopathy is a microvascular complication of diabetes that can lead to blindness. In the present study, we aimed to determine the nature of diabetes-induced, highly localized biochemical changes in the neuroretina at the onset of diabetes. High-resolution synchrotron Fourier transform infrared (s-FTIR) wide field microscopy coupled with multivariate analysis (PCA-LDA) was employed to identify biomarkers of diabetic retinopathy with spatial resolution at the cellular level. We compared the retinal tissue prepared from 6-week-old Ins2(Akita/+) heterozygous (Akita/+, N = 6; a model of diabetes) male mice with the wild-type (control, N = 6) mice...
February 17, 2017: Analyst
https://www.readbyqxmd.com/read/28209905/diagnostic-value-of-18-f-fdg-pet-ct-versus-mri-in-the-setting-of-antibody-specific-autoimmune-encephalitis
#8
Lilja B Solnes, Krystyna M Jones, Steven P Rowe, Puskar Pattanayak, Abhinav Nalluri, Arun Venkatesan, John C Probasco, Mehrbod Som Javadi
Introduction: Diagnosis of autoimmune encephalitis presents some challenges in the clinical setting due to varied clinical presentations and delay in obtaining antibody panel results. We examined the role of neuroimaging in the setting of autoimmune encephalitides comparing the utility (18)F-FDG PET/CT versus conventional brain imaging with MRI. Methods: A retrospective study was performed assessing the positivity rate of MRI versus (18)F-FDG PET/CT during the initial work-up of 23 patients proven to have antibody positive autoimmune encephalitis...
February 16, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28209644/mitochondrial-dysfunction-induces-dendritic-loss-via-eif2%C3%AE-phosphorylation
#9
Taiichi Tsuyama, Asako Tsubouchi, Tadao Usui, Hiromi Imamura, Tadashi Uemura
Mitochondria are key contributors to the etiology of diseases associated with neuromuscular defects or neurodegeneration. How changes in cellular metabolism specifically impact neuronal intracellular processes and cause neuropathological events is still unclear. We here dissect the molecular mechanism by which mitochondrial dysfunction induced by Prel aberrant function mediates selective dendritic loss in Drosophila melanogaster class IV dendritic arborization neurons. Using in vivo ATP imaging, we found that neuronal cellular ATP levels during development are not correlated with the progression of dendritic loss...
February 16, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28209287/molecular-imaging-of-the-nicotinic-cholinergic-receptor-in-alzheimer-disease
#10
EDITORIAL
Gwenn S Smith
No abstract text is available yet for this article.
January 5, 2017: American Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28208801/atomic-force-microscopy-a-powerful-tool-to-address-scaffold-design-in-tissue-engineering
#11
Marica Marrese, Vincenzo Guarino, Luigi Ambrosio
Functional polymers currently represent a basic component of a large range of biological and biomedical applications including molecular release, tissue engineering, bio-sensing and medical imaging. Advancements in these fields are driven by the use of a wide set of biodegradable polymers with controlled physical and bio-interactive properties. In this context, microscopy techniques such as Atomic Force Microscopy (AFM) are emerging as fundamental tools to deeply investigate morphology and structural properties at micro and sub-micrometric scale, in order to evaluate the in time relationship between physicochemical properties of biomaterials and biological response...
February 13, 2017: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/28208719/micro-computed-tomography-detection-of-gold-nanoparticle-labelled-mesenchymal-stem-cells-in-the-rat-subretinal-layer
#12
Pooi Ling Mok, Sue Ngein Leow, Avin Ee-Hwan Koh, Hairul Harun Mohd Nizam, Suet Lee Shirley Ding, Chi Luu, Raduan Ruhaslizan, Hon Seng Wong, Wan Haslina Wan Abdul Halim, Min Hwei Ng, Ruszymah Binti Hj Idrus, Shiplu Roy Chowdhury, Catherine Mae-Lynn Bastion, Suresh Kumar Subbiah, Akon Higuchi, Abdullah A Alarfaj, Kong Yong Then
Mesenchymal stem cells are widely used in many pre-clinical and clinical settings. Despite advances in molecular technology; the migration and homing activities of these cells in in vivo systems are not well understood. Labelling mesenchymal stem cells with gold nanoparticles has no cytotoxic effect and may offer suitable indications for stem cell tracking. Here, we report a simple protocol to label mesenchymal stem cells using 80 nm gold nanoparticles. Once the cells and particles were incubated together for 24 h, the labelled products were injected into the rat subretinal layer...
February 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28208698/advances-in-molecular-imaging-of-locally-delivered-targeted-therapeutics-for-central-nervous-system-tumors
#13
REVIEW
Umberto Tosi, Christopher S Marnell, Raymond Chang, William C Cho, Richard Ting, Uday B Maachani, Mark M Souweidane
Thanks to the recent advances in the development of chemotherapeutics, the morbidity and mortality of many cancers has decreased significantly. However, compared to oncology in general, the field of neuro-oncology has lagged behind. While new molecularly targeted chemotherapeutics have emerged, the impermeability of the blood-brain barrier (BBB) renders systemic delivery of these clinical agents suboptimal. To circumvent the BBB, novel routes of administration are being applied in the clinic, ranging from intra-arterial infusion and direct infusion into the target tissue (convection enhanced delivery (CED)) to the use of focused ultrasound to temporarily disrupt the BBB...
February 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28208666/the-mechanisms-and-biomedical-applications-of-an-nir-bodipy-based-switchable-fluorescent-probe
#14
Bingbing Cheng, Venugopal Bandi, Shuai Yu, Francis D'Souza, Kytai T Nguyen, Yi Hong, Liping Tang, Baohong Yuan
Highly environment-sensitive fluorophores have been desired for many biomedical applications. Because of the noninvasive operation, high sensitivity, and high specificity to the microenvironment change, they can be used as excellent probes for fluorescence sensing/imaging, cell tracking/imaging, molecular imaging for cancer, and so on (i.e., polarity, viscosity, temperature, or pH measurement). In this work, investigations of the switching mechanism of a recently reported near-infrared environment-sensitive fluorophore, ADP(CA)₂, were conducted...
February 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28208623/fluorescence-lectin-bar-coding-of-glycoconjugates-in-the-extracellular-matrix-of-biofilm-and-bioaggregate-forming-microorganisms
#15
Thomas R Neu, Ute Kuhlicke
Microbial biofilm systems are defined as interface-associated microorganisms embedded into a self-produced matrix. The extracellular matrix represents a continuous challenge in terms of characterization and analysis. The tools applied in more detailed studies comprise extraction/chemical analysis, molecular characterization, and visualisation using various techniques. Imaging by laser microscopy became a standard tool for biofilm analysis, and, in combination with fluorescently labelled lectins, the glycoconjugates of the matrix can be assessed...
February 10, 2017: Microorganisms
https://www.readbyqxmd.com/read/28208509/orientational-action-of-edge-dislocations-on-the-director-field-in-antiferroelectric-smectic-c_-a-films
#16
P V Dolganov, N S Shuravin, V K Dolganov, Atsuo Fukuda
We report imaging of the director field near edge dislocations in thermotropic antiferroelecric smectic-C_{A}^{*} (SmC_{A}^{*}) liquid crystal. Measurements were made in freestanding films with thickness from two to ten smectic layers. We find two different orientations of the molecular tilt plane with respect to the edge dislocation line. The orientation is determined by the value of the Burgers vector of the dislocation. Elementary edge dislocation and dislocations with a Burgers vector equal to an odd number of layers orient the tilt plane perpendicular on the two sides of the dislocation...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28208011/glucosylsphingosine-activates-serotonin-receptor-2a-and-2b-implication-of-a-novel-itch-signaling-pathway
#17
Ramsha Afzal, Won-Sik Shim
Recent reports claimed that glucosylsphingosine (GS) is highly accumulated and specifically evoking itch-scratch responses in the skins of atopic dermatitis (AD) patients. However, it was unclear how GS can trigger itch-scratch responses, since there were no known molecular singling pathways revealed yet. In the present study, it was verified for the first time that GS can activate mouse serotonin receptor 2a (mHtr2a) and 2b (mHtr2b), but not 2c (mHtr2c) that are expressed in HEK293T cells. Specifically, effects of GS on all mouse serotonin receptor 2 subfamily were evaluated by calcium imaging techniques...
February 17, 2017: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/28207191/cysteine-proteases-in-atherosclerosis
#18
REVIEW
Tommy Weiss Sadan, Israel Gotsman, Galia Blum
Atherosclerosis predisposes patients to cardiovascular diseases, such as myocardial infarction and stroke. Instigation of vascular injury is triggered by retention of lipids and inflammatory cells in the vascular endothelium. Whereas these vascular lesions develop in young adults and are mostly considered harmless, over time persistent inflammatory and remodeling processes will ultimately damage the arterial wall and cause a thrombotic event due to exposure of tissue factors into the lumen. Evidence from human tissues and pre-clinical animal models have clearly established the role of cathepsin cysteine proteases in the development and progression of vascular lesions...
February 16, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28207159/the-critical-role-of-the-znf217-oncogene-in-promoting-breast-cancer-metastasis-to-the-bone
#19
Aurélie Bellanger, Caterina F Donini, Julie A Vendrell, Jonathan Lavaud, Irma Machuca-Gayet, Maëva Ruel, Julien Vollaire, Evelyne Grisard, Balázs Győrffy, Ivan Bièche, Olivier Peyruchaud, Jean-Luc Coll, Isabelle Treilleux, Véronique Maguer-Satta, Véronique Josserand, Pascale A Cohen
Bone metastasis affects more than 70% of patients with advanced breast cancer. However, the molecular mechanisms underlying this process remain unclear. Based on the analysis of clinical datasets, and in vitro and in vivo experiments, we report that the ZNF217 oncogene is a crucial mediator and indicator of bone metastasis. Patients with high ZNF217 mRNA expression levels in primary breast tumours had a higher risk of developing bone metastases. MDA-MB-231 breast cancer cells stably transfected with ZNF217 (MDA-MB-231-ZNF217) displayed the dysregulated expression of a set of genes with bone homing and metastasis characteristics, which overlapped with two previously described "osteolytic bone metastasis" gene signatures, while also highlighting the bone morphogenetic protein (BMP) pathway...
February 16, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28205432/fluorescent-hexose-conjugates-establish-stringent-stereochemical-requirement-by-glut5-for-recognition-and-transport-of-monosaccharides
#20
Olivier-Mohamad Soueidan, Thomas W Scully, Jatinder Kaur, Rashmi Panigrahi, Alexandr Belovodskiy, Victor Do, Carson D Matier, M Joanne Lemieux, Frank Wuest, Chris Cheeseman, F G West
The specificity characteristics of transporters can be exploited for the development of novel diagnostic therapeutic probes. The facilitated hexose transporter family (GLUTs) has a distinct set of preferences for monosaccharide substrates, and while some are expressed ubiquitously (e.g., GLUT1), others are quite tissue specific (e.g., GLUT5, which is overexpressed in some breast cancer tissues). While these differences have enabled the development of new molecular probes based upon hexose- and tissue-selective uptake, substrate design for compounds targeting these GLUT transporters has been encumbered by a limited understanding of the molecular interactions at play in hexose binding and transport...
February 16, 2017: ACS Chemical Biology
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