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https://www.readbyqxmd.com/read/29790189/the-identification-of-a-novel-antibody-for-cd133-using-human-antibody-phage-display
#1
Paige M Glumac, Colleen L Forster, Hong Zhou, Paari Murugan, Shilpa Gupta, Aaron M LeBeau
BACKGROUND: The transmembrane glycoprotein CD133 is believed to be a marker of adult prostate stem cells and cancer stem/initiating cells. Investigating the role of CD133 in the normal biology of the prostate and in cancer is complicated by the lack of a sensitive and accurate antibody for its detection. Here, we describe the characterization of a unique antibody identified using human antibody phage display that can recognize CD133 in both formalin-fixed tissues and cell lines. METHODS: A human single-chain variable fragment (scFv) antibody phage display library possessing a diversity of 8 × 109 was screened against fully glycosylated recombinant CD133...
May 22, 2018: Prostate
https://www.readbyqxmd.com/read/29789683/bmp-2-restoration-aids-in-recovery-from-liver-fibrosis-by-attenuating-tgf-%C3%AE-1-signaling
#2
Yueh-Hua Chung, Ying-Hsien Huang, Tien-Huei Chu, Chun-Lin Chen, Pey-Ru Lin, Shih-Chung Huang, Deng-Chyang Wu, Chao-Cheng Huang, Tsung-Hui Hu, Ying-Hsien Kao, Ming-Hong Tai
Transforming growth factor-β (TGF-β) plays a central role in hepatic fibrogenesis. This study investigated the function and mechanism of bone morphogenetic protein-2 (BMP-2) in regulation of hepatic fibrogenesis. BMP-2 expression in fibrotic liver was measured in human tissue microarray and mouse models of liver fibrosis induced by bile duct ligation surgery or carbon tetrachloride administration. Adenovirus-mediated BMP-2 gene delivery was used to test the prophylactic effect on liver fibrosis. Primary hepatic stellate cells (HSC), HSC-T6 and clone-9 cell lines were used to study the interplay between BMP-2 and TGF-β1...
May 22, 2018: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/29755667/a-set-of-cancer-stem-cell-homing-peptides-associating-with-the-glycan-moieties-of-glycosphingolipids
#3
Yu-Hsiu Su, Tai-Yun Lin, Hung-Jen Liu, Chin-Kai Chuang
Cancer stem cells (CSCs) are currently believed to be involved in tumor metastasis and relapse. And treatments against CSCs are well concerned issues. Peptides targeting to mouse and human CSCs were screened from an M13 phage display library. The first subset of cancer stem cell homing peptides (CSC HPs), CSC HP-1 to -12, were screened with mouse EMT6 breast cancer stem cells. Among them, CSC HP-1, CSC HP-3, CSC HP-8, CSC HP-9, and CSC HP-10 can bind to mouse CT26 colon CSCs; CSC HP-1, CSC HP-2, CSC HP-3, and CSC HP-8 can bind to mouse Hepa1-6 liver CSCs; as well as CSC HP-1, CSC HP-2, CSC HP-3, CSC HP-8, CSC HP-9, CSC HP-10, and CSC HP-11 can bind to human PANC-1 pancreatic CSCs...
April 17, 2018: Oncotarget
https://www.readbyqxmd.com/read/29749436/production-of-an-anti-tm4sf5-monoclonal-antibody-and-its-application-in-the-detection-of-tm4sf5-as-a-possible-marker-of-a-poor-prognosis-in-colorectal-cancer
#4
Byoung Kwon Park, Jae-Young Park, Te Ha Kim, Dongbum Kim, Guang Wu, Avishekh Gautam, Sony Maharjan, Su In Lee, Younghee Lee, Hyung-Joo Kwon, Kyung Chan Choi
The cell surface transmembrane 4 superfamily member 5 protein (TM4SF5) has been implicated in various human cancers. Immunization with a peptide vaccine targeting human TM4SF5 has been shown to exert prophylactic and therapeutic effects against the development of hepatocellular carcinoma and colon cancer in mouse models. In this study, we developed a novel monoclonal antibody (mEC2‑CF) targeting a cyclic epitope of TM4SF5 and evaluated its reactivity to TM4SF5 in colorectal cancer (CRC) cells and cancer tissues...
April 26, 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29746851/glycomics-and-proteomics-approaches-to-investigate-early-adenovirus-host-cell-interactions
#5
REVIEW
Lisa Lasswitz, Naresh Chandra, Niklas Arnberg, Gisa Gerold
Adenoviruses as most viruses rely on glycan and protein interactions to attach to and enter susceptible host cells. The Adenoviridae family comprises more than 80 human types and they differ in their attachment factor and receptor usage, which likely contributes to the diverse tropism of the different types. In the past years methods to systematically identify glycan and protein interactions have advanced. In particular sensitivity, speed and coverage of mass spectrometric analyses allows high-throughput identification of glycans and peptides separated by liquid chromatography...
May 7, 2018: Journal of Molecular Biology
https://www.readbyqxmd.com/read/29738527/defensive-effect-of-microrna-200b-c-against-amyloid-beta-peptide-induced-toxicity-in-alzheimer-s-disease-models
#6
Sayuri Higaki, Masashi Muramatsu, Akio Matsuda, Kenji Matsumoto, Jun-Ichi Satoh, Makoto Michikawa, Shumpei Niida
MiRNA molecules are important post-transcriptional regulators of gene expression in the brain function. Altered miRNA profiles could represent a defensive response against the pathogenesis of neurodegenerative disorders, such as Alzheimer's disease (AD). Endogenous miRNAs have lower toxic effects than other gene silencing methods, thus enhancing the expression of defensive miRNA could be an effective therapy. However, little is known about the potential of targeting miRNAs for the treatment of AD. Here, we examined the function of the miR-200 family (miR-200a, -141, -429, -200b, -200c), identified using miRNA microarray analysis of cortical tissue from Tg2576 transgenic mice...
2018: PloS One
https://www.readbyqxmd.com/read/29709778/electrochemical-immunosensor-for-differential-diagnostic-of-wuchereria-bancrofti-using-a-synthetic-peptide
#7
Isis C Prado, Verônica G Mendes, André L A Souza, Rosa F Dutra, Salvatore G De-Simone
Lymphatic filariasis (LF) is a neglected tropical disease transmitted by mosquitoes and the second cause of permanent disability leading to a significant morbidity and mortality rate. Previously, we have identified epitopes of the filarial abundant larval transcript-2 (ALT-2) protein using a microarray mapping. In this study, one of the epitopes (Wb/ALT2-A5) was used to construct an electrochemical immunosensor. Electrochemical technique of cyclic voltammetry was performed for detecting the signal generated by the interaction between the (Wb/ALT2-A5) peptide and circulating antibodies of serum human samples...
April 22, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29706528/applications-of-a-novel-biodetection-system-to-saliva-using-protein-fingerprints-with-data-processing
#8
Yuki Tominaga, Kenji Usui, Akiyoshi Hirata, Hiro-O Ito, Kiyoshi Nokihara
A fundamental method has been developed focusing on a facile and rapid examination of periodontal disease. Periodontal disease is an oral disease thought to affect 80% of adults, and early detection with treatment is desirable for the improvement of the quality of life. Unfortunately conventional methods are not consistent as the disease is caused by a number of undefined bacteria and detection relies on the skills of the dentist. Thus an objective detection system is required. We have performed an experiment on saliva using a novel biodetection system, designated PepTenChip®...
April 24, 2018: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29695834/contribution-of-three-dimensional-architecture-and-tumor-associated-fibroblasts-to-hepcidin-regulation-in-breast-cancer
#9
Nicole Blanchette-Farra, Daniel Kita, Anna Konstorum, Lia Tesfay, David Lemler, Poornima Hegde, Kevin P Claffey, Frank M Torti, Suzy V Torti
Hepcidin is a peptide hormone that negatively regulates iron efflux and plays an important role in controlling the growth of breast tumors. In patients with breast cancer, the combined expression of hepcidin and its membrane target, ferroportin, predict disease outcome. However, mechanisms that control hepcidin expression in breast cancer cells remain largely unknown. Here, we use three-dimensional breast cancer spheroids derived from cell lines and breast cancer patients to probe mechanisms of hepcidin regulation in breast cancer...
April 26, 2018: Oncogene
https://www.readbyqxmd.com/read/29694733/rational-design-of-peptide-affinity-ligands-for-the-purification-of-therapeutic-enzymes
#10
J P Trasatti, J Woo, A Ladiwala, S Cramer, P Karande
Non-mAb biologics represent a growing class of therapeutics under clinical development. Although affinity chromatography is a potentially attractive approach for purification, the development of platform technologies, such as Protein A for mAbs, has been challenging due to the inherent chemical and structural diversity of these molecules. Here, we present our studies on the rapid development of peptide affinity ligands for the purification of biologics using a prototypical enzyme therapeutic in clinical use...
April 25, 2018: Biotechnology Progress
https://www.readbyqxmd.com/read/29686372/rgg-shp-regulators-are-important-for-pneumococcal-colonization-and-invasion-through-their-effect-on-mannose-utilization-and-capsule-synthesis
#11
Xiangyun Zhi, Iman Tajer Abdullah, Ozcan Gazioglu, Irfan Manzoor, Sulman Shafeeq, Oscar P Kuipers, N Luisa Hiller, Peter W Andrew, Hasan Yesilkaya
Microbes communicate with each other by using quorum sensing (QS) systems and modulate their collective 'behavior' for in-host colonization and virulence, biofilm formation, and environmental adaptation. The recent increase in genome data availability reveals the presence of several putative QS sensing circuits in microbial pathogens, but many of these have not been functionally characterized yet, despite their possible utility as drug targets. To increase the repertoire of functionally characterized QS systems in bacteria, we studied Rgg144/Shp144 and Rgg939/Shp939, two putative QS systems in the important human pathogen Streptococcus pneumoniae...
April 23, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29683978/antimicrobial-peptide-human-neutrophil-peptide-1-as-a-potential-link-between-chronic-inflammation-and-ductal-adenocarcinoma-of-the-pancreas
#12
Thomas Pausch, Sarah Adolph, Klaus Felix, Andrea S Bauer, Frank Bergmann, Jens Werner, Werner Hartwig
OBJECTIVES: Defensins are antimicrobial peptides playing a role in innate immunity, in epithelial cell regeneration, and in carcinogenesis of inflammation-triggered malignancies. We analyzed this role in pancreatic ductal adenocarcinoma (PDAC) in the context of its association with chronic pancreatitis (CP). METHODS: Human tissue of healthy pancreas, CP, and PDAC was screened for defensins by immunohistochemistry. Defensin α 1 (human neutrophil peptide 1 [HNP-1]) expression was validated using mass spectrometry and microarray analysis...
April 19, 2018: Pancreas
https://www.readbyqxmd.com/read/29679892/electric-field-driven-assembly-of-live-bacterial-cell-microarrays-for-rapid-phenotypic-assessment-and-cell-viability-testing
#13
Meenal Goel, Abhishek Verma, Shalini Gupta
Microarray technology to isolate living cells using external fields is a facile way to do phenotypic analysis at the cellular level. We have used alternating current dielectrophoresis (AC-DEP) to drive the assembly of live pathogenic Salmonella typhi (S.typhi) and Escherichia coli (E.coli) bacteria into miniaturized single cell microarrays. The effects of voltage and frequency were optimized to identify the conditions for maximum cell capture which gave an entrapment efficiency of 90% in 60 min. The chip was used for calibration-free estimation of cellular loads in binary mixtures and further applied for rapid and enhanced testing of cell viability in the presence of drug via impedance spectroscopy...
April 7, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29667660/a-new-functional-membrane-protein-microarray-based-on-tethered-phospholipid-bilayers
#14
Meriem Chadli, Ofelia Maniti, Christophe Marquette, Bruno Tillier, Sandra Cortès, Agnès Girard-Egrot
A new prototype of a membrane protein biochip is presented in this article. This biochip was created by the combination of novel technologies of peptide-tethered bilayer lipid membrane (pep-tBLM) formation and solid support micropatterning. Pep-tBLMs integrating a membrane protein were obtained in the form of microarrays on a gold chip. The formation of the microspots was visualized in real-time by surface plasmon resonance imaging (SPRi) and the functionality of a GPCR (CXCR4), reinserted locally into microwells, was assessed by ligand binding studies...
April 18, 2018: Analyst
https://www.readbyqxmd.com/read/29625018/sugar-sensor-genes-in-the-murine-gastrointestinal-tract-display-a-cephalocaudal-axis-of-expression-and-a-diurnal-rhythm
#15
Patrick O'Brien, Rhys Hewett, Christopher Corpe
Distributed along the length of the gastrointestinal (GI) tract are nutrient sensing cells that release numerous signalling peptides influencing GI function, nutrient homeostasis and energy balance. Recent studies have shown a diurnal rhythm in GI nutrient sensing, but the mechanisms responsible for rhythmicity are poorly understood. In this report we studied murine GI sugar sensor gene and protein expression levels in the morning (7am) and evening (7pm). Sweet taste receptor (tas1r2/tas1r3/gnat3/ gnat1) sugar transporter (slc5a1, slc2a2, slc2a5) and putative sugar sensor (slc5a4a and slc5a4b) gene expression levels were highest in tongue, proximal and distal small intestine, respectively...
April 6, 2018: Physiological Genomics
https://www.readbyqxmd.com/read/29616023/immune-control-of-burkholderia-pseudomallei-common-high-frequency-t-cell-responses-to-a-broad-repertoire-of-immunoprevalent-epitopes
#16
Arnone Nithichanon, Darawan Rinchai, Surachat Buddhisa, Pornpun Saenmuang, Chidchamai Kewcharoenwong, Bianca Kessler, Prasong Khaenam, Ploenchan Chetchotisakd, Bernard Maillere, John Robinson, Catherine J Reynolds, Rosemary J Boyton, Daniel M Altmann, Ganjana Lertmemongkolchai
Burkholderia pseudomallei (Bp) is an environmental bacterial pathogen that causes potentially lethal sepsis in susceptible individuals and is considered a Category B, Tier-1 biothreat agent. As such, it is crucial to gain an improved understanding of protective immunity and potential vaccine candidates. The nature of immune correlates dictating why most exposed individuals in endemic regions undergo asymptomatic seroconversion while others succumb to life-threatening sepsis is largely uncharted. Bp seroreactive, immunogenic proteins have previously been identified by antigen microarray...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29593701/metabolic-phenotype-characterization-of-botrytis-cinerea-the-causal-agent-of-gray-mold
#17
Han-Cheng Wang, Li-Cui Li, Bin Cai, Liu-Ti Cai, Xing-Jiang Chen, Zhi-He Yu, Chuan-Qing Zhang
Botrytis cinerea , which causes gray mold, is an important pathogen in four important economic crops, tomato, tobacco, cucumber and strawberry, in China and worldwide. Metabolic phenomics data on B. cinerea isolates from these four crops were characterized and compared for 950 phenotypes with a BIOLOG Phenotype MicroArray (PM). The results showed that the metabolic fingerprints of the four B. cinerea isolates were similar to each other with minimal differences. B. cinerea isolates all metabolized more than 17% of the tested carbon sources, 63% of the amino acid nitrogen substrates, 80% of the peptide nitrogen substrates, 93% of the phosphorus substrates, and 97% of the sulfur substrates...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29584756/transcriptional-signature-associated-with-early-rheumatoid-arthritis-and-healthy-individuals-at-high-risk-to-develop-the-disease
#18
N Macías-Segura, J E Castañeda-Delgado, Y Bastian, D Santiago-Algarra, J D Castillo-Ortiz, A L Alemán-Navarro, E Jaime-Sánchez, M Gomez-Moreno, C A Saucedo-Toral, Edgar E Lara-Ramírez, M Zapata-Zuñiga, L Enciso-Moreno, R González-Amaro, C Ramos-Remus, J A Enciso-Moreno
BACKGROUND: Little is known regarding the mechanisms underlying the loss of tolerance in the early and preclinical stages of autoimmune diseases. The aim of this work was to identify the transcriptional profile and signaling pathways associated to non-treated early rheumatoid arthritis (RA) and subjects at high risk. Several biomarker candidates for early RA are proposed. METHODS: Whole blood total RNA was obtained from non-treated early RA patients with <1 year of evolution as well as from healthy first-degree relatives of patients with RA (FDR) classified as ACCP+ and ACCP- according to their antibodies serum levels against cyclic citrullinated peptides...
2018: PloS One
https://www.readbyqxmd.com/read/29584543/distinguishing-molecular-features-of-allergic-fungal-rhinosinusitis
#19
Matthew A Tyler, Caroline J Padro Dietz, Chris B Russell, Martin J Citardi, Shervin Assassi, Jun Ying, Amber U Luong
Objective Allergic fungal rhinosinusitis (AFRS) is a clinical subtype of chronic rhinosinusitis with nasal polyps (CRSwNP), characterized by eosinophilic mucin, evidence of fungal elements within the mucin, fungal-specific type I hypersensitivity, and characteristic computed tomography findings. It remains controversial whether AFRS represents a disease with a unique pathophysiology from chronic rhinosinusitis or is merely a severe form of CRSwNP. The goal of this study was to identify molecular features unique to AFRS...
March 1, 2018: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29580922/characteristic-glycopeptides-associated-with-extreme-human-longevity-identified-through-plasma-glycoproteomics
#20
Yuri Miura, Noritaka Hashii, Yuki Ohta, Yoko Itakura, Hiroki Tsumoto, Junya Suzuki, Daisuke Takakura, Yukiko Abe, Yasumichi Arai, Masashi Toyoda, Nana Kawasaki, Nobuyoshi Hirose, Tamao Endo
BACKGROUND: Glycosylation is highly susceptible to changes of the physiological conditions, and accordingly, is a potential biomarker associated with several diseases and/or longevity. Semi-supercentenarians (SSCs; older than 105 years) are thought to be a model of human longevity. Thus, we performed glycoproteomics using plasma samples of SSCs, and identified proteins and conjugated N-glycans that are characteristic of extreme human longevity. METHODS: Plasma proteins from Japanese semi-supercentenarians (SSCs, 106-109 years), aged controls (70-88 years), and young controls (20-38 years) were analysed by using lectin microarrays and liquid chromatography/mass spectrometry (LC/MS)...
March 24, 2018: Biochimica et Biophysica Acta
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