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https://www.readbyqxmd.com/read/29675103/mir-490-3p-functions-as-a-tumor-suppressor-by-inhibiting-oncogene-vdac1-expression-in-colorectal-cancer
#1
Xiangxiang Liu, Bangshun He, Tao Xu, Yuqin Pan, Xiuxiu Hu, Xiaoxiang Chen, Shukui Wang
Colorectal cancer (CRC) is one of the most common cancers worldwide, usually with poor prognosis because many CRC patients are diagnosed at an advanced stage. Therefore, novel potential diagnostic and prognostic biomarkers are urgently needed. MicroRNAs have been reported to regulate a variety of biological processes, such as cell proliferation, differentiation and apoptosis. Accumulating studies have demonstrated that miR-490-3p could regulate the development and progression of multiple cancers, but its clinical significance and molecular mechanism in CRC are still elusive...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29674713/enzyme-catalyzed-ag-growth-on-au-nanoparticle-assembled-structure-for-highly-sensitive-colorimetric-immunoassay
#2
Xuan-Hung Pham, Eunil Hahm, Tae Han Kim, Hyung-Mo Kim, Sang Hun Lee, Yoon-Sik Lee, Dae Hong Jeong, Bong-Hyun Jun
We have developed a sensitive colorimetric immunoassay with broad dynamic range using enzyme-catalyzed Ag growth on gold nanoparticle (NP)-assembled silica (SiO2 @Au@Ag). To reduce Ag+ ion content and promote Ag growth on the assembled Au NPs, alkaline phosphatase (AP)-based enzymatic amplification was incorporated, which considerably increased the colorimetric read-out. As a model study, sandwich enzyme-linked immunosorbent assay (ELISA) was used to quantify target IgG. The immune complexes capture the Ab-IgG-AP-labeled detection Ab and trigger the enzyme-catalyzed reaction to convert 2-phospho-L-ascorbic acid to ascorbic acid in the presence of the target IgG...
April 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29674419/comparative-study-of-the-novel-rgd-motif-containing-itg%C3%AE-v%C3%AE-6-binding-peptides-sflap3-and-sfitgv6-for-diagnostic-application-in-hnscc
#3
Saskia Roesch, Thomas Lindner, Max Sauter, Anastasia Loktev, Paul Flechsig, Martin Müller, Walter Mier, Rolf Warta, Gerhard Dyckhoff, Christel Herold-Mende, Uwe Haberkorn, Annette Altmann
Alpha v beta 6 (αvβ6) integrin is overexpressed by several carcinomas, and thus considered as target for diagnostic imaging and anti-cancer therapies. Recently, we presented SFITGv6 as a novel potential tracer for imaging and targeted therapy of αvβ6 integin-positive carcinomas. Here, we analyzed affinity and specificity of five native αvβ6 integrin-specific binders in comparison to SFITGv6. Methods: Sunflower trypsin inhibitor (SFTI)-1-based peptides containing arginine-glycine-aspartic acid (RGD) motif-spanning octamers of fibronectin (SFFN1), tenascin C (SFTNC), vitronectin (SFVTN), and latency-associated peptides (LAP) 1 (SFLAP1), and 3 (SFLAP3) were synthesized and their binding potential to αvβ6 integrin-expressing head and neck squamous cell carcinoma (HNSCC) cell lines was evaluated...
April 19, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29669339/upregulation-of-lncdq-is-associated-with-poor-prognosis-and-promotes-tumor-progression-via-epigenetic-regulation-of-the-emt-pathway-in-hcc
#4
Bing Zeng, Zewei Lin, Huilin Ye, Di Cheng, Guangtao Zhang, Jindu Zhou, Zhifeng Huang, Meng Wang, Canfeng Cai, Jun Zeng, Chaoming Tang, Jikui Liu
BACKGROUND/AIMS: Long noncoding RNAs (lncRNAs) are key regulators of cancer initiation and progression. In this study, we investigated the clinical value and functional role of LncRNA DQ786243 (LncDQ) in the pathogenesis of hepatocellular carcinoma (HCC). METHODS: To investigate the expression level of LncDQ in HCC, we performed quantitative real-time PCR using total RNA extracted from HCC tumor tissues and their matched non-neoplastic counterparts, as well as from the serum of HCC patients and healthy volunteers...
April 13, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29665837/the-cxcl5-cxcr2-axis-contributes-to-the-epithelial-mesenchymal-transition-of-nasopharyngeal-carcinoma-cells-by-activating-erk-gsk-3%C3%AE-snail-signalling
#5
Wen-Ze Qiu, Hai-Bo Zhang, Wei-Xiong Xia, Liang-Ru Ke, Jing Yang, Ya-Hui Yu, Hu Liang, Xin-Jun Huang, Guo-Ying Liu, Wang-Zhong Li, Yan-Qun Xiang, Tie-Bang Kang, Xiang Guo, Xing Lv
BACKGROUND: Distant metastasis is the major cause of treatment failure in patients with nasopharyngeal carcinoma (NPC). Although several biomarkers correlate with metastasis and prognosis, the molecular mechanisms of NPC development and progression remain unclear. METHODS: Quantitative RT-PCR (qRT-PCR), western blotting, cell growth, foci formation, migration and invasion assays, and xenograft mouse models were utilized to examine the expression levels and functions of the CXCL5/CXCR2 axis in NPC...
April 17, 2018: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/29665345/evaluation-of-ifn-%C3%AE-enzyme-linked-immunospot-assay-elispot-as-a-first-line-test-in-the-diagnosis-of-non-immediate-hypersensitivity-to-amoxicillin-and-penicillin
#6
Lenka Sedláčková, Miroslav Průcha, Ingrid Poláková, Blanka Míková
The current diagnostic algorithm for beta-lactam allergy is based on skin and provocation tests, both of which carry a certain risk of inducing hypersensitivity reactions. Thus, non-invasive in vitro tests reliable enough to replace skin and provocation tests at least in a portion of patients are desirable. We aimed to verify the utility of IFN-γ ELISPOT as a first-line test in patients with suspected non-immediate hypersensitivity reaction to amoxicillin (AMX) and penicillin (PNC). The prospective observational study included 24 patients with recent, suspected non-immediate hypersensitivity reaction to AMX or PNC and 6 recently-exposed healthy subjects...
2018: Prague Medical Report
https://www.readbyqxmd.com/read/29665287/identification-of-nanoparticles-and-nanosystems-in-biological-matrices-with-scanning-probe-microscopy
#7
REVIEW
Livia Angeloni, Melania Reggente, Daniele Passeri, Marco Natali, Marco Rossi
Identification of nanoparticles and nanosystems into cells and biological matrices is a hot research topic in nanobiotechnologies. Because of their capability to map physical properties (mechanical, electric, magnetic, chemical, or optical), several scanning probe microscopy based techniques have been proposed for the subsurface detection of nanomaterials in biological systems. In particular, atomic force microscopy (AFM) can be used to reveal stiff nanoparticles in cells and other soft biomaterials by probing the sample mechanical properties through the acquisition of local indentation curves or through the combination of ultrasound-based methods, like contact resonance AFM (CR-AFM) or scanning near field ultrasound holography...
April 17, 2018: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/29663885/liposomes-as-a-promising-uultrasound-triggered-drug-delivery-system-in-cancer-treatment
#8
N M Salkho, R Z Turki, O Guessoum, A M Martins, R F Vitor, G A Husseini
The initial uses of ultrasound waves in the medical field were limited to the thermal ablation of solid tumors and as a diagnostic tool. Recent advances at the preclinical stage have allowed the use of ultrasound as a powerful tool to improve drug delivery when the agent is administered encapsulated inside a nanoparticle. This spatial and temporal control of drug release, using a non-invasive modality, is a promising approach to decrease the side effects of conventional chemotherapy in cancer treatments, as it reduces the interaction of the anti-neoplastic agent with healthy tissues...
April 15, 2018: Current Molecular Medicine
https://www.readbyqxmd.com/read/29663167/structural-studies-on-radiopharmaceutical-dota-minigastrin-analogue-cp04-complexes-and-their-interaction-with-cck2-receptor
#9
Piotr F J Lipiński, Piotr Garnuszek, Michał Maurin, Raphael Stoll, Nils Metzler-Nolte, Artur Wodyński, Jan Cz Dobrowolski, Marta K Dudek, Monika Orzełowska, Renata Mikołajczak
BACKGROUND: The cholecystokinin receptor subtype 2 (CCK-2R) is an important target for diagnostic imaging and targeted radionuclide therapy (TRNT) due to its overexpression in certain cancers (e.g., medullary thyroid carcinoma (MTC)), thus matching with a theranostic principle. Several peptide conjugates suitable for the TRNT of MTC have been synthesized, including a very promising minigastrin analogue DOTA-(DGlu)6 -Ala-Tyr-Gly-Trp-Met-Asp-Phe-NH2 (CP04). In this contribution, we wanted to see whether CP04 binding affinity for CCK-2R is sensitive to the type of the complexed radiometal, as well as to get insights into the structure of CP04-CCK2R complex by molecular modeling...
April 16, 2018: EJNMMI Research
https://www.readbyqxmd.com/read/29658818/a-long-non-coding-sineup-rna-boosts-semi-stable-production-of-fully-human-monoclonal-antibodies-in-hek293e-cells
#10
Emanuele Sasso, Debora Latino, Guendalina Froechlich, Mariangela Succoio, Margherita Passariello, Claudia De Lorenzo, Alfredo Nicosia, Nicola Zambrano
Use of monoclonal antibodies is emerging as a highly promising and fast-developing scenario for innovative treatment of viral, autoimmune and tumour diseases. The search for diagnostic and therapeutic antibodies currently depends on in vitro screening approaches, such as phage and yeast display technologies. Antibody production still represents a critical step for preclinical and clinical evaluations. Accordingly, improving production of monoclonal antibodies represents an opportunity, to facilitate downstream target validations...
April 16, 2018: MAbs
https://www.readbyqxmd.com/read/29652094/from-in-vivo-to-in-vitro-how-the-guatemala-std-experiments-transformed-bodies-into-biospecimens
#11
Kayte Spector-Bagdady, Paul A Lombardo
Policy Points: While most scholarship regarding the US Public Health Service's STD experiments in Guatemala during the 1940s has focused on the intentional exposure experiments, secondary research was also conducted on biospecimens collected from these subjects. These biospecimen experiments continued after the Guatemala grant ended, and the specimens were used in conjunction with those from the Tuskegee syphilis experiments for ongoing research. We argue there should be a public accounting of whether there are still biospecimens from the Guatemala and Tuskegee experiments held in US government biorepositories today...
April 13, 2018: Milbank Quarterly
https://www.readbyqxmd.com/read/29651958/arterial-stiffness-in-haemodialysed-patients-findings-and-controversies
#12
Edmundo I Cabrera-Fischer, Yanina Zocalo, Sandra Wray, Daniel Bia
Vascular research in end-stage renal diseases is an interesting field in which the characterization of arterial stiffness proved to be valuable to predict morbidity and mortality. Particularly, patients in renal replacement therapy have been reported to have significant increases of arterial stiffness and cardiovascular mortality. The clinical relevance of the measurement of arterial stiffness is linked to therapeutical and preventive interventions. The purpose of this work is to analyze the results of the scientific research in the field of arterial stiffness, in which hemodialyzed patients were involved, emphasizing on clinical and in-vitro research carried out by our group compared to contributions previously reported in the specialized literature...
April 12, 2018: Current Hypertension Reviews
https://www.readbyqxmd.com/read/29651883/lncrna-dancr-promotes-lung-cancer-by-sequestering-mir-216a
#13
Qiang Zhen, Li-Na Gao, Ren-Feng Wang, Wei-Wei Chu, Ya-Xiao Zhang, Xiao-Jian Zhao, Bao-Lei Lv, Jia-Bao Liu
BACKGROUND: Long noncoding RNAs (lncRNAs) are a new class of cancer regulators. Here, we aimed to investigate the diagnostic and therapeutic values of an lncRNA, differentiation antagonizing noncoding RNA (DANCR), in lung cancer. METHODS: Real-time polymerase chain reaction was used to compare DANCR levels in normal and cancerous lung tissues as well as lung cancer cells. Lentiviral transduction was used to induce DANCR overexpression or silencing in vitro, followed by monitoring cell proliferation, colony formation, and changes in microRNA-216a (miR-216a) expression...
January 2018: Cancer Control: Journal of the Moffitt Cancer Center
https://www.readbyqxmd.com/read/29643919/an-update-on-molecular-cat-allergens-fel-d-1-and-what-else-chapter-1-fel-d-1-the-major-cat-allergen
#14
REVIEW
B Bonnet, K Messaoudi, F Jacomet, E Michaud, J L Fauquert, D Caillaud, B Evrard
Background: Cats are the major source of indoor inhalant allergens after house dust mites. The global incidence of cat allergies is rising sharply, posing a major public health problem. Ten cat allergens have been identified. The major allergen responsible for symptoms is Fel d 1, a secretoglobin and not a lipocalin, making the cat a special case among mammals. Main body: Given its clinical predominance, it is essential to have a good knowledge of this allergenic fraction, including its basic structure, to understand the new exciting diagnostic and therapeutic applications currently in development...
2018: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/29643425/a-novel-two-score-system-for-interferon-status-segregates-autoimmune-diseases-and-correlates-with-clinical-features
#15
Y M El-Sherbiny, A Psarras, M Y Md Yusof, E M A Hensor, R Tooze, G Doody, A A A Mohamed, D McGonagle, M Wittmann, P Emery, E M Vital
Measurement of type I interferon (IFN-I) has potential to diagnose and stratify autoimmune diseases, but existing results have been inconsistent. Interferon-stimulated-gene (ISG) based methods may be affected by the modularity of the ISG transcriptome, cell-specific expression, response to IFN-subtypes and bimodality of expression. We developed and clinically validated a 2-score system (IFN-Score-A and -B) using Factor Analysis of 31 ISGs measured by TaqMan selected from 3-IFN-annotated modules. We evaluated these scores using in-vitro IFN stimulation as well as in sorted cells then clinically validated in a cohort of 328 autoimmune disease patients and healthy controls...
April 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29642505/bmp9-promotes-the-proliferation-and-migration-of-bladder-cancer-cells-through-up-regulating-lncrna-uca1
#16
Liyao Gou, Mengyao Liu, Jing Xia, Qun Wan, Yayun Jiang, Shilei Sun, Min Tang, Lan Zhou, Tongchuan He, Yan Zhang
As the most common malignant tumor of the urinary system worldwide, the bladder tumor has a high mortality rate, which is mainly due to its onset of concealment. Therefore, research into novel diagnostic markers and treatment of bladder cancer is urgently needed. BMP9 (Bone morphogenetic protein 9) is a member of BMP, which belongs to the TGF-β (transforming growth factor-β) superfamily. It has been associated with multiple tumors. We found that BMP9 is highly expressed in bladder cancer cells and it could significantly promote the proliferation and migration of bladder cancer cells...
April 8, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29629952/the-expression-of-tmem74-in-liver-cancer-and-lung-cancer-correlating-with-survival-outcomes
#17
Yizhe Sun, Jinhai Deng, Peng Xia, Wei Chen, Lu Wang
Transmembrane 74 (TMEM74), a transmembrane protein as an autophagy inducer, has been proven to promote tumor cell (including cervical cancer cell line HeLa and hepatic carcinoma cell line HepG2) proliferation by triggering autophagy. To further determine the role of TMEM74 in cancer, we performed immunohistochemical staining on tissue array, and the results showed that TMEM74 exhibited significantly higher expression in several tumor types, especially in hepatocellular carcinoma, lung adenocarcinoma, and squamous carcinoma...
April 7, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/29626546/aptamer-chemistry
#18
Pascal Röthlisberger, Marcel Hollenstein
Aptamers are single-stranded DNA or RNA molecules capable of tightly binding to specific targets. These functional nucleic acids are obtained by an in vitro Darwinian evolution method coined SELEX (Systematic Evolution of Ligands by EXponential enrichment). Compared to their proteinaceous counterparts, aptamers offer a number of advantages including a low immunogenicity, a relative ease of large-scale synthesis at affordable costs with little or no batch-to-batch variation, physical stability, and facile chemical modification...
April 4, 2018: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29626120/a-new-method-for-tumor-imaging-by-targeting-cancer-associated-fibroblasts
#19
Anastasia Loktev, Thomas Lindner, Walter Mier, Jürgen Debus, Annette Altmann, Dirk Jäger, Frederik Giesel, Clemens Kratochwil, Philippe Barthe, Christian Roumestand, Uwe Haberkorn
The tumor stroma, which accounts for a large part of the tumor mass, represents an attractive target for the delivery of diagnostic and therapeutic compounds. Here, the focus is notably on a subpopulation of stromal cells, known as cancer-associated fibroblasts (CAFs), which are present in more than 90% of epithelial carcinomas including pancreatic, colon and breast cancer. CAFs feature a high expression of fibroblast activation protein (FAP), which is not detectable in adult normal tissue but associated with a poor prognosis in cancer patients...
April 6, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29626119/development-of-quinoline-based-theranostic-ligands-for-the-targeting-of-fibroblast-activation-protein
#20
Thomas Lindner, Anastasia Loktev, Annette Altmann, Frederik Giesel, Clemens Kratochwil, Jürgen Debus, Dirk Jäger, Walter Mier, Uwe Haberkorn
Fibroblast activation protein (FAP) is overexpressed in cancer associated fibroblasts and is involved in a variety of tumor promoting activities such as matrix remodeling, angiogenesis, chemotherapy resistance and immunosuppression. Since FAP shows low expression in most normal organs it presents an interesting target for imaging and endoradiotherapy. In this paper, FAP inhibitors were modified and optimized for their use as theranostic tracers. Methods: FAP inhibitors (FAPIs) based on a quinoline structure were synthesized and characterized with respect to binding, internalization and efflux in cells expressing human and murine FAP as well as CD26...
April 6, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
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