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https://www.readbyqxmd.com/read/28738590/extracellular-matrix-characterization-in-plaques-from-carotid-endarterectomy-by-a-proteomics-approach
#1
N Ucciferri, S Rocchiccioli, L Comelli, M Marconi, M Ferrari, G Pelosi, A Cecchettini
Extracellular matrix (ECM) is a fundamental component of multicellular organisms. Alteration of its structure and/or molecular composition are associated with several pathologies, among the others with atherosclerosis. To determine how the overall ECM architecture of a tissue as complex as the atheroma may change under varying pathological conditions constitutes a great technical challenge. This entails removing cell components and solubilisation of fibrillar proteins in order to allow enzymatic digestion and mass spectrometry analyses...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738503/integration-of-protein-extraction-with-a-stream-of-byproducts-from-marine-macroalgae-a-model-forms-the-basis-for-marine-bioeconomy
#2
Tejal K Gajaria, Poornima Suthar, Ravi S Baghel, Nikunj B Balar, Preeti Sharnagat, Vaibhav A Mantri, C R K Reddy
The present study describes an advanced biorefinery model for marine macroalgae that assumes significant importance in the context of marine bio-economy. The method investigated in this study integrates the extraction of crude proteins with recovery of minerals rich sap, lipids, ulvan and cellulose from fresh biomass of Ulva lactuca. The protein content extracted was 11±2.12% on dry weight basis with recovery efficiency of 68.75±4.01%. The amino acid composition of crude protein fraction showed iso-leucine as the most abundant amino acid with 16...
July 5, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28738491/-establishment-of-a-model-of-hydrogen-peroxide-induced-injury-in-pulmonary-artery-endothelium-cells-and-relevant-mechanisms-of-oxidative-stress
#3
J Ye, Y Y He, Y Yan, J H Zhao, T Y Lian, X J Wang, Y Yan, S J Zhang, S H Yang, Z C Jing
Objective: To establish a hydrogen peroxide (H(2)O(2)) induced injury model of pulmonary artery endothelial cells (PAECs) and explore the molecular mechanisms of oxidative stress on the structure and function of PAECs in this model. Methods: Human PAECs were treated with H(2)O(2) at different concentrations (25, 50, 100, 200, 400, 800, 1 600, 3 200, 6 400 μmol/L) for 4 and 24 h, respectively. The PAECs survival curve was obtained according to the cell viability measured by CCK-8 assay. The cell apoptosis of PAECs was detected by flow cytometry...
July 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28738254/stereoselective-protein-binding-studies-of-2-2-hydroxypropanamido-benzoic-acid-enantiomers-in-rat-beagle-dog-and-human-plasma
#4
Qili Zhang, Shasha Li, Danlin Wang, Yunli Zhao, Zhiguo Yu
As the stereoselective plasma protein binding is an important factor for the differences in pharmacokinetic or pharmacodynamic properties of chiral drugs, we elucidated the binding of (R)-/(S)-HPABA to plasma protein. A UHPLC-MS/MS method was developed and validated to the quantitation and equilibrium dialysis method was applied to the separation of bound and unbound drugs. Protein binding reached equilibrium within 12h of incubation at 37°C. Liquid-liquid extraction with ethyl acetate was used for sample preparation...
June 23, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28738231/sliding-strip-microfluidic-device-enables-elisa-on-paper
#5
Mohit S Verma, Maria-Nefeli Tsaloglou, Tyler Sisley, Dionysios Christodouleas, Austin Chen, Jonathan Milette, George M Whitesides
This article describes a 3D microfluidic paper-based analytical device that can be used to conduct an enzyme-linked immunosorbent assay (ELISA). The device comprises two parts: a sliding strip (which contains the active sensing area) and a structure surrounding the sliding strip (which holds stored reagents-buffers, antibodies, and enzymatic substrate-and distributes fluid). Running an ELISA involves adding sample (e.g. blood) and water, moving the sliding strip at scheduled times, and analyzing the resulting color in the sensing area visually or using a flatbed scanner...
July 19, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28738086/an-essential-ebv-latent-antigen-3c-binds-bcl6-for-targeted-degradation-and-cell-proliferation
#6
Yonggang Pei, Shuvomoy Banerjee, Hem Chandra Jha, Zhiguo Sun, Erle S Robertson
The latent EBV nuclear antigen 3C (EBNA3C) is required for transformation of primary human B lymphocytes. Most mature B-cell malignancies originate from malignant transformation of germinal center (GC) B-cells. The GC reaction appears to have a role in malignant transformation, in which a major player of the GC reaction is Bcl6, a key regulator of this process. We now demonstrate that EBNA3C contributes to B-cell transformation by targeted degradation of Bcl6. We show that EBNA3C can physically associate with Bcl6...
July 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28738067/the-prediction-of-late-onset-preeclampsia-results-from-a-longitudinal-proteomics-study
#7
Offer Erez, Roberto Romero, Eli Maymon, Piya Chaemsaithong, Bogdan Done, Percy Pacora, Bogdan Panaitescu, Tinnakorn Chaiworapongsa, Sonia S Hassan, Adi L Tarca
BACKGROUND: Late-onset preeclampsia is the most prevalent phenotype of this syndrome; nevertheless, only a few biomarkers for its early diagnosis have been reported. We sought to correct this deficiency using a high through-put proteomic platform. METHODS: A case-control longitudinal study was conducted, including 90 patients with normal pregnancies and 76 patients with late-onset preeclampsia (diagnosed at ≥34 weeks of gestation). Maternal plasma samples were collected throughout gestation (normal pregnancy: 2-6 samples per patient, median of 2; late-onset preeclampsia: 2-6, median of 5)...
2017: PloS One
https://www.readbyqxmd.com/read/28738020/resident-memory-t-cells-in-the-skin-mediate-durable-immunity-to-melanoma
#8
Brian T Malik, Katelyn T Byrne, Jennifer L Vella, Peisheng Zhang, Tamer B Shabaneh, Shannon M Steinberg, Aleksey K Molodtsov, Jacob S Bowers, Christina V Angeles, Chrystal M Paulos, Yina H Huang, Mary Jo Turk
Tissue-resident memory T (TRM) cells have been widely characterized in infectious disease settings; however, their role in mediating immunity to cancer remains unknown. We report that skin-resident memory T cell responses to melanoma are generated naturally as a result of autoimmune vitiligo. Melanoma antigen-specific TRM cells resided predominantly in melanocyte-depleted hair follicles and were maintained without recirculation or replenishment from the lymphoid compartment. These cells expressed CD103, CD69, and CLA (cutaneous lymphocyte antigen), but lacked PD-1 (programmed cell death protein-1) or LAG-3 (lymphocyte activation gene-3), and were capable of making IFN-γ (interferon-γ)...
April 14, 2017: Science Immunology
https://www.readbyqxmd.com/read/28738016/eomesodermin-promotes-the-development-of-type-1-regulatory-t-tr1-cells
#9
Ping Zhang, Jason S Lee, Kate H Gartlan, Iona S Schuster, Iain Comerford, Antiopi Varelias, Md Ashik Ullah, Slavica Vuckovic, Motoko Koyama, Rachel D Kuns, Kelly R Locke, Kirrilee J Beckett, Stuart D Olver, Luke D Samson, Marcela Montes de Oca, Fabian de Labastida Rivera, Andrew D Clouston, Gabrielle T Belz, Bruce R Blazar, Kelli P MacDonald, Shaun R McColl, Ranjeny Thomas, Christian R Engwerda, Mariapia A Degli-Esposti, Axel Kallies, Siok-Keen Tey, Geoffrey R Hill
Type 1 regulatory T (TR1) cells are Foxp3(-) interleukin-10 (IL-10)-producing CD4(+) T cells with potent immunosuppressive properties, but their requirements for lineage development have remained elusive. We show that TR1 cells constitute the most abundant regulatory population after allogeneic bone marrow transplantation (BMT), express the transcription factor Eomesodermin (Eomes), and are critical for the prevention of graft-versus-host disease. We demonstrate that Eomes is required for TR1 cell differentiation, during which it acts in concert with the transcription factor B lymphocyte-induced maturation protein-1 (Blimp-1) by transcriptionally activating IL-10 expression and repressing differentiation into other T helper cell lineages...
April 7, 2017: Science Immunology
https://www.readbyqxmd.com/read/28737980/nitration-of-h2b-histone-elicits-an-immune-response-in-experimental-animals
#10
Md Asad Khan, Khursheed Alam, Syed Mehdi Hassan, M Moshahid A Rizvi
Histone H2B is an autoantigen that appears in circulation due to altered apoptosis/or insufficient clearance and is likely to be involved in the induction and progression of autoimmune diseases since modified-H2B is immunogenic. Our studies demonstrate that tyrosines of H2B histone spontaneously converts to free and nitrotyrosine bound protein in vivo. Commercially available H2B histone was modified with peroxynitrite in vitro. Modified H2B was found to be more immunogenic than native form in experimental animals...
July 24, 2017: Autoimmunity
https://www.readbyqxmd.com/read/28737941/unveiling-the-catalytic-role-of-b-block-histidine-in-the-n-s-acyl-shift-step-of-protein-splicing
#11
Jon I Mujika, Xabier Lopez
Protein splicing is a post-translational modification that involves the excision of a segment denoted as intein and the joining of its two flanking segments. The process is auto-catalytic, making inteins appealing for many applications in biotechnology, bioengineering, or medicine. The canonical mechanism of protein splicing is composed of four sequential steps, and is initialized by an N-S or N-O acyl shift to form a linear ester. It is well established that a histidine, the most conserved amino acid in all inteins catalyzes this initial step, even though its role remains to be understood...
July 24, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28737878/-unusual-case-of-food-protein-induced-enterocolitis-syndrome
#12
M Teresa Sobrevia Elfau, Yolanda Aliaga Mazas, Gonzalo Herraiz Gastesi, Paula M Barberá Pérez, Ángela M Ascaso Matamala
Food protein-induced enterocolitis syndrome is a nonimmunoglobulin E mediated gastrointestinal food hypersensitivity that manifests as profuse, repetitive vomiting, pallor and hypotonia, often with diarrhea leading to severe dehydration and lethargy (sepsis-like symptoms) in the acute setting. An oral food challenge is sometimes performed to confirm the diagnosis and treatment consists of elimination of the food trigger(s) from the diet. We report a case of a 3-monthsold infant with several episodes of food protein-induced enterocolitis syndrome after taking infant formula milk with tolerance of another trademark...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28737823/overexpression-of-non%C3%A2-smc-condensin%C3%A2-i-complex-subunit%C3%A2-g-serves-as-a-promising-prognostic-marker-and-therapeutic-target-for-hepatocellular-carcinoma
#13
Wanwei Liu, Bo Liang, Hongliang Liu, Yong Huang, Xiangbao Yin, Fan Zhou, Xin Yu, Qian Feng, Enliang Li, Zhenhong Zou, Linquan Wu
The non‑SMC condensin I complex subunit G (NCAPG) that organizes the coiling topology of individual chromatids, represents an overexpressed antigen in various types of cancer, and also contributes to restructuring chromatin into rod‑shaped mitotic chromosomes and ensuring the segregation of sister chromatid during cell division. In this study, we investigated the association between NCAPG expression and the biological behavior of hepatocellular carcinoma (HCC) to further explore the potential of NCAPG as a therapeutic target...
July 24, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28737767/sensitive-and-non-invasive-method-for-the-in-vivo-analysis-of-membrane-permeability-in-small-animals
#14
Andrea Fernandez-Carrera, Eva Vigo, Carla Regueiro-Rodríguez, África González-Fernández, David Olivieri, Luiz S Aroeira
Tissue membranes are boundaries that isolate organs or cavities in the body. These semi-permeable membranes are responsible for passive protection that acts through the regulation of nutrient absorption, secretion and filtration of small molecules. These functions could be altered as a consequence of inflammation or trauma, which in turn could lead to changes in permeability, allowing the entrance of toxins, antigens, proteins or facilitating the spread of tumors. Membrane permeability therefore plays an important role in numerous diseases...
July 24, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28737756/overexpression-of-zinc-finger-protein-687-enhances-tumorigenic-capability-and-promotes-recurrence-of-hepatocellular-carcinoma
#15
T Zhang, Y Huang, W Liu, W Meng, H Zhao, Q Yang, S-J Gu, C-C Xiao, C-C Jia, B Zhang, Y Zou, H-P Li, B-S Fu
Zinc finger protein 687 (ZNF687), identified as a C2H2 zinc finger protein, has been found to be mutated and upregulated in giant cell tumor of bone and acute myeloid leukemia, suggesting an oncogenic role for ZNF687 in cancer. However, the clinical significance and precise role of ZNF687 in cancer progression are largely unknown. Herein, we report that ZNF687 was markedly upregulated in hepatocellular carcinoma (HCC) cell lines and HCC tissues, and was significantly correlated with relapse-free survival in HCC...
July 24, 2017: Oncogenesis
https://www.readbyqxmd.com/read/28737676/high-dose-ascorbate-causes-both-genotoxic-and-metabolic-stress-in-glioma-cells
#16
Maria Leticia Castro, Georgia M Carson, Melanie J McConnell, Patries M Herst
We have previously shown that exposure to high dose ascorbate causes double stranded breaks (DSBs) and a build-up in S-phase in glioblastoma (GBM) cell lines. Here we investigated whether or not this was due to genotoxic stress as well as metabolic stress generated by exposure to high dose ascorbate, radiation, ascorbate plus radiation and H₂O₂ in established and primary GBM cell lines. Genotoxic stress was measured as phosphorylation of the variant histone protein, H2AX, 8-oxo-7,8-dihydroguanine (8OH-dG) positive cells and cells with comet tails...
July 22, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28737508/targeting-nek2-attenuates-glioblastoma-growth-and-radioresistance-by-destabilizing-histone-methyltransferase-ezh2
#17
Jia Wang, Peng Cheng, Marat S Pavlyukov, Hai Yu, Zhuo Zhang, Sung-Hak Kim, Mutsuko Minata, Ahmed Mohyeldin, Wanfu Xie, Dongquan Chen, Violaine Goidts, Brendan Frett, Wenhao Hu, Hongyu Li, Yong Jae Shin, Yeri Lee, Do-Hyun Nam, Harley I Kornblum, Maode Wang, Ichiro Nakano
Accumulating evidence suggests that glioma stem cells (GSCs) are important therapeutic targets in glioblastoma (GBM). In this study, we identified NIMA-related kinase 2 (NEK2) as a functional binding protein of enhancer of zeste homolog 2 (EZH2) that plays a critical role in the posttranslational regulation of EZH2 protein in GSCs. NEK2 was among the most differentially expressed kinase-encoding genes in GSC-containing cultures (glioma spheres), and it was required for in vitro clonogenicity, in vivo tumor propagation, and radioresistance...
July 24, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28737385/a-synthetic-circuit-for-mercury-bioremediation-using-self-assembling-functional-amyloids
#18
Pei Kun Richie Tay, Peter Q Nguyen, Neel S Joshi
Synthetic biology approaches to bioremediation are a key sustainable strategy to leverage the self-replicating and programmable aspects of biology for environmental stewardship. The increasing spread of anthropogenic mercury pollution into our habitats and food chains is a pressing concern. Here, we explore the use of programmed bacterial biofilms to aid in the sequestration of mercury. We demonstrate that by integrating a mercury-responsive promoter and an operon encoding a mercury-absorbing self-assembling extracellular protein nanofiber, we can engineer bacteria that can detect and sequester toxic Hg2+ ions from the environment...
July 24, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28737240/in-gel-and-offgel-based-proteomic-approach-for-authentication-of-meat-species-from-minced-meat-and-meat-products
#19
Basappa M Naveena, Deepak S Jagadeesh, Veeranna Kamuni, Muthukumar M, Vinayak V Kulkarni, Kiran M, Srikanth Rapole
BACKGROUND: Fraudulent mislabelling of processed meat products on global scale which could not be detected using conventional techniques demand for sensitive, robust and accurate methods of meat authentication to ensure food safety and public health. In the present study, we developed in-gel (2-dimensional gel electrophoresis, 2DE) and OFFGEL-based proteomic method for authenticating raw and cooked water buffalo (Bubalus bubalis), sheep (Ovis aries) and goat (Caprus hircus) meat and their mixes...
July 24, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28737232/chlorinated-adenosine-analogue-induces-ampk-and-autophagy-in-chronic-lymphocytic-leukaemia-cells-during-therapy
#20
Christine M Stellrecht, Lisa S Chen, Mary L Ayres, Jennifer B Dennison, Shujun Shentu, Yuling Chen, Michael J Keating, William G Wierda, Varsha Gandhi
8-chloro-adenosine (8-Cl-Ado) is currently in phase-I clinical trials for acute myeloid leukaemia and chronic lymphocytic leukaemia (CLL). Previously, we demonstrated that treatment with 8-Cl-Ado leads to diminished ATP levels. We hypothesized that AMP-activated protein kinase (AMPK) signalling would be initiated in these cells, leading to induction of autophagy. AMPK activation and induction of autophagy were demonstrated during preclinical incubations in CLL cells with the analogues. Importantly, we extended similar observations in CLL lymphocytes during an 8-Cl-Ado phase-I trial...
July 24, 2017: British Journal of Haematology
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