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Antibody response

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https://www.readbyqxmd.com/read/29793132/ph-responsive-label-assisted-click-chemistry-triggered-sensitivity-amplification-for-ultrasensitive-electrochemical-detection-of-carbohydrate-antigen-24-2
#1
Yun Zheng, Lihua Zhao, Zhanfang Ma
Sensitivity amplification strategy by implementing click chemistry in the construction of biosensing interface can efficiently improve the performance of immunosensor. Herein, we developed a sandwich-type amperometric immunosensor for ultrasensitive detection of carbohydrate antigen 24-2 (CA 242) based on pH responsive label-assisted click chemistry triggered sensitivity amplification strategy. The sensitivity of amperometric immunosensor relies on the current response differences (ΔI) caused by per unit concentration target analyte...
May 15, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29792904/monoclonal-antibody-dl11c8-identifies-adam23-as-a-component-of-lipid-raft-microdomains
#2
Zaine L M Borgonovo, Caroline F Ribeiro, Michele D M Costa, Ingrid L M Souza, Gustavo R Rossi, Monica V Alcantara, Max Ingberman, Luciano G Braga, Adriana F Mercadante, Lia S Nakao, Silvio M Zanata
A disintegrin and metalloprotease protein 23 (ADAM23) is a transmembrane type I glycoprotein involved with the development and maintenance of the nervous system, including neurite outgrowth, neuronal adhesion and differentiation and regulation of synaptic transmission. In addition, ADAM23 seems to participate in immune response and tumor establishment through interaction with different members of integrin receptors. Here, we describe a novel monoclonal antibody (DL11C8) that specifically recognizes the cysteine-rich domain of both pre-protein (100kDa) and mature (70 kDa) forms of ADAM23 from different species, including human, rodents and avian orthologs...
May 21, 2018: Neuroscience
https://www.readbyqxmd.com/read/29792808/eradication-of-established-tumors-by-chemically-self-assembled-nanoring-csan-targeted-t-cells
#3
Jacob Petersburg, Jingjing Shen, Clifford M Csizmar, Katherine A Murphy, Justin Spanier, Kari Gabrielse, Thomas S Griffith, Brian Fife, Carston R Wagner
Our laboratory has developed chemically self-assembled nanorings (CSANs) as prosthetic antigen receptors (PARs) for the non-genetic modification of T-cell surfaces. PARs have been successfully employed in vitro to activate T cells for the selective killing of leukemia cells. However, PAR efficacy has yet to be evaluated in vivo or against solid tumors. Therefore, we developed bispecific PARs that selectively target the human CD3 receptor and human Epithelial Cell Adhesion Molecule (EpCAM), which is overexpressed on multiple carcinomas and cancer stem cells...
May 24, 2018: ACS Nano
https://www.readbyqxmd.com/read/29792724/a-systematic-understanding-of-signaling-by-erbb2-in-cancer-using-phosphoproteomics
#4
C Sidhanth, P Manasa, S Krishnapriya, S Sneha, S Bindhya, R P Nagare, M Garg, T S Ganesan
ErbB2 is an important receptor tyrosine kinase and a member of the ErbB family. Although it does not have a specific ligand, it transmits signals downstream by heterodimerization with other receptors in the family. It plays a major role in a variety of cellular responses like proliferation, differentiation, and adhesion. ErbB2 is amplified at the DNA level in breast cancer (20%-30%) and gastric cancer (10%-20%), and trastuzumab is effective as a therapeutic antibody. This review is a critical analysis of the currently published data on the signaling pathways of ErbB2 and the interacting proteins...
May 24, 2018: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/29792679/a-nanozyme-and-ambient-light-based-smartphone-platform-for-simultaneous-detection-of-dual-biomarkers-from-exposure-to-organophosphorus-pesticides
#5
Yuting Zhao, Mingming Yang, Qiangqiang Fu, Hui Ouyang, Wei Wen, Yang Song, Chengzhou Zhu, Yuehe Lin, Dan Du
A transparent, lateral-flow test strip coupled with a smartphone-based ambient light sensor was first proposed for detect-ing enzymatic inhibition and phosphorylation. The principle of the platform is based on the simultaneous measurement of the total amount of the enzyme and enzyme activity to biomonitor exposure to organophosphorus (OP) pesticides. In this study, butyrylcholinesterase (BChE) was adopted as the model enzyme and ethyl paraoxon was chosen as an analyte representing OP pesticides. The total amount of BChE was quantified by a sensitive colorimetric signal originating from a sandwich immunochromatographic assay utilizing PtPd nanoparticles as a polyphenol oxidase-mimicking probe, which provided a higher sensitivity than that of a peroxidase-like probe...
May 24, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29792670/biomarker-based-metabolic-labeling-for-redirected-and-enhanced-immune-response
#6
Shanshan Li, Bingchen Yu, Jiajia Wang, Yueqin Zheng, Huajie Zhang, Margaret J Walker, Zhengnan Yuan, He Zhu, Jun Zhang, Peng George Wang, Binghe Wang
Installation of an antibody-recruiting moiety on the surface of disease-relevant cells can lead to the selective destruction of targets by the immune system. Such an approach can be an alternative strategy to traditional chemotherapeutics in cancer therapy and possibly other diseases. Herein we describe the development of a new strategy to selectively label targets with an antibody-recruiting moiety through its covalent and stable installation, complementing existing methods of employing reversible binding...
May 24, 2018: ACS Chemical Biology
https://www.readbyqxmd.com/read/29792546/application-of-a-mixture-model-to-assess-the-effect-of-measles-mumps-rubella-vaccine-on-the-mumps-epidemic-in-children-from-kindergarten-to-early-school-age-in-jiangsu-province-china
#7
Lei Zhang, Zhiguo Wang, Ying Hu, Xiuying Deng, Hongxiong Guo, Xiang Sun, Fenyang Tang, Minghao Zhou, Yuanbao Liu
A single dose of the measles-mumps-rubella (MMR) vaccine has been applied in routine immunizations for children in China; however, the Immunoglobulin G (IgG) antibody level of mumps in children from kindergarten to early school age with MMR vaccine immunization history has not been elucidated. This study aimed to describe the immunity profile of children from kindergarten to early school age to identify the susceptible population. In Jiangsu Province, a cross-sectional survey of 4- to 8-year-old children who were vaccinated with at least one dose of MMR vaccine was conducted...
May 24, 2018: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29792298/nanobody-antigen-conjugates-elicit-hpv-specific-anti-tumor-immune-responses
#8
Andrew W Woodham, Ross W Cheloha, Jingjing Ling, Mohammad Rashidian, Stephen C Kolifrath, Maia Mesyngier, Joao N Duarte, Justin M Bader, Joseph G Skeate, Diane M Da Silva, W Martin Kast, Hidde L Ploegh
High-risk human papillomavirus-associated cancers express viral oncoproteins (e.g., E6 and E7) that induce and maintain the malignant phenotype. The viral origin of these proteins makes them attractive targets for development of a therapeutic vaccine. Camelid-derived single-domain antibody fragments (nanobodies or VHHs) that recognize cell surface proteins on antigen-presenting cells (APCs) can serve as targeted delivery vehicles for antigens attached to them. Such VHHs were shown to induce CD4+ and CD8+ T-cell responses against model antigens conjugated to them via sortase, but antitumor responses had not yet been investigated...
May 23, 2018: Cancer Immunology Research
https://www.readbyqxmd.com/read/29792178/anti-ganglioside-complex-antibody-profiles-in-a-recurrent-complicated-case-of-gq1b-seronegative-miller-fisher-syndrome-and-bickerstaff-brainstem-encephalitis-a-case-report
#9
Hiroto Ito, Yuki Hatanaka, Yuki Fukami, Yumiko Harada, Rei Kobayashi, Hisashi Okada, Ayumi Uchibori, Atsuro Chiba, Satoshi Okuda
BACKGROUND: Guillain-Barré syndrome (GBS), Miller Fisher syndrome (MFS) and Bickerstaff brainstem encephalitis (BBE) are a group of autoimmune neurological disorders (GBS spectrum disorder) that rarely recur. Recently, anti-ganglioside complex antibodies (GSC-Abs) were identified in patients with GBS spectrum disorder. However, there has been no case report describing GSC-Abs profiles in a recurrent case showing different phenotypes. CASE PRESENTATION: We report the case of a 33-year-old male patient with GQ1b-seronegative BBE-GBS after two prior episodes of MFS-GBS...
May 23, 2018: BMC Neurology
https://www.readbyqxmd.com/read/29792135/modified-ldl-immune-complexes-and-cardiovascular-disease
#10
Maria F Lopes-Virella, Gabriel Virella
Modified forms of LDL, both spontaneously formed in the organism or prepared in the laboratory, are immunogenic. As a consequence, antigen-antibody complexes (immune complexes, IC) formed in vivo can be measured in the peripheral blood, and their levels are strong predictors of cardiovascular disease (CVD). It has been possible to generate antibodies that recognize different LDL modifications, allowing the analysis of circulating IC constitution. Clinical studies showed that the antigenic constitution of the IC has a modulating effect on the development of CVD...
May 23, 2018: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29791846/myosin-iia-promotes-antibody-responses-by-regulating-b-cell-activation-acquisition-of-antigen-and-proliferation
#11
Robbert Hoogeboom, Elizabeth M Natkanski, Carla R Nowosad, Dessislava Malinova, Rajesh P Menon, Antonio Casal, Pavel Tolar
B cell responses are regulated by antigen acquisition, processing, and presentation to helper T cells. These functions are thought to depend on contractile activity of non-muscle myosin IIa. Here, we show that B cell-specific deletion of the myosin IIa heavy chain reduced the numbers of bone marrow B cell precursors and splenic marginal zone, peritoneal B1b, and germinal center B cells. In addition, myosin IIa-deficient follicular B cells acquired an activated phenotype and were less efficient in chemokinesis and extraction of membrane-presented antigens...
May 22, 2018: Cell Reports
https://www.readbyqxmd.com/read/29791513/vaccine-induced-antibodies-to-herpes-simplex-virus-glycoprotein-d-epitopes-involved-in-virus-entry-and-cell-to-cell-spread-correlate-with-protection-against-genital-disease-in-guinea-pigs
#12
Lauren M Hook, Tina M Cairns, Sita Awasthi, Benjamin D Brooks, Noah T Ditto, Roselyn J Eisenberg, Gary H Cohen, Harvey M Friedman
Herpes simplex virus type 2 (HSV-2) glycoprotein D (gD2) subunit antigen is included in many preclinical candidate vaccines. The rationale for including gD2 is to produce antibodies that block crucial gD2 epitopes involved in virus entry and cell-to-cell spread. HSV-2 gD2 was the only antigen in the Herpevac Trial for Women that protected against HSV-1 genital infection but not HSV-2. In that trial, a correlation was detected between gD2 ELISA titers and protection against HSV-1, supporting the importance of antibodies...
May 23, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29791435/immunogenicity-and-efficacy-following-sequential-parenterally-administered-doses-of-salmonella-enteritidis-cops-flic-glycoconjugates-in-infant-and-adult-mice
#13
Scott M Baliban, Brittany Curtis, Deanna Toema, Sharon M Tennant, Myron M Levine, Marcela F Pasetti, Raphael Simon
In sub-Saharan Africa, invasive nontyphoidal Salmonella (iNTS) infections with serovars S. Enteritidis, S. Typhimurium and I 4,[5],12:i:- are widespread in children < 5 years old. Development of an efficacious vaccine would provide an important public health tool to prevent iNTS disease in this population. Glycoconjugates of S. Enteritidis core and O-polysaccharide (COPS) coupled to the homologous serovar phase 1 flagellin protein (FliC) were previously shown to be immunogenic and protected adult mice against death following challenge with a virulent Malian S...
May 23, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29791073/elevated-histone-h3-acetylation-is-associated-with-genes-involving-in-t-lymphocyte-activation-and-gada-production-in-patients-with-type-1-diabetes
#14
Yanfei Wang, Can Hou, Jonathan Wisler, Kanhaiya Singh, Chao Wu, Zhiguo Xie, Qianjin Lu, Zhiguang Zhou
AIM: Genetic and epigenetic mechanisms have been implicated in the pathogenesis of type 1 diabetes (T1D), and histone acetylation is an epigenetic modification pattern that activates gene transcription. However, the genome-wide histone H3 acetylation in newly onset T1D patients has been less described. Accordingly, we aimed to unveil the genome-wide promoter acetylation profile in CD4+ T lymphocytes from T1D patients, especially for those with glutamate decarboxylase antibody (GADA) positive...
May 23, 2018: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/29791021/immtac-anti-pd-1-combination-to-enhance-killing-of-cancer-cells-by-reversing-treg-mediated-immunosuppression
#15
Huanling Zhang, Yanyan Li, Xiaoping Liu, Zhaoduan Liang, Mengyong Yan, Qiang Liu, Anan Chen, Yifeng Bao, Chengzhi Zhou, Shiyue Li, Cassian Yee, Yi Li
Recently, bi-functional molecules that can redirect immune effectors to tumor cells have emerged as potentially robust mediators of tumor regression in clinical trials. Two modalities, in particular, bi-specific antibodies for T cell redirection and activation (BiTe) and immune-mobilizing monoclonal T-cell receptors against cancer (ImmTAC) are being evaluated in efficacy studies as 'off-the-shelf' reagents. Optimal therapy will require an understanding and means to address regulatory mechanisms of limiting efficacy...
May 23, 2018: Immunology
https://www.readbyqxmd.com/read/29790966/tcrmodel-high-resolution-modeling-of-t-cell-receptors-from-sequence
#16
Ragul Gowthaman, Brian G Pierce
T cell receptors (TCRs), along with antibodies, are responsible for specific antigen recognition in the adaptive immune response, and millions of unique TCRs are estimated to be present in each individual. Understanding the structural basis of TCR targeting has implications in vaccine design, autoimmunity, as well as T cell therapies for cancer. Given advances in deep sequencing leading to immune repertoire-level TCR sequence data, fast and accurate modeling methods are needed to elucidate shared and unique 3D structural features of these molecules which lead to their antigen targeting and cross-reactivity...
May 22, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29790849/-n-methyl-d-aspartate-receptor-antibody-encephalitis-the-janus-faced-disorder
#17
Ildiko Sipos
The recognition of the antibody-mediated encephalitis as a separate entity among the immune disorders of the central nervous system was one of the greatest breakthroughs of the last two decades in neurology. Unlike viral or tumor-related encephalitis, the antibody-mediated form has a good response to immunotherapy, which gives a special clinical importance to the discovery. Anti-N-methyl-D-aspartate receptor (anti-NMDAR) encephalitis is one of the first fully characterized antibody-mediated encephalitises. This article attempts to summarize the clinical features of this complex neuropsychiatric disorder with the aim to help its early recognition and to report the clinical course and the outcome of our six seropositive anti-NMDAR cases...
March 2018: Neuropsychopharmacologia Hungarica
https://www.readbyqxmd.com/read/29790701/the-clinical-importance-of-changes-in-treg-and-th17-lymphocyte-subsets-in-splenectomized-patients-after-spleen-injury
#18
Witold Zgodziński, Ewelina Grywalska, Dorota Siwicka-Gieroba, Agata Surdacka, Krzysztof Zinkiewicz, Dariusz Szczepanek, Grzegorz Wallner, Jacek Roliński
BACKGROUND: Splenectomized patients are more prone to bacterial infections due to their immunocompromised status. Little is known about the role of T helper 17 (Th17) and T regulatory cells (Treg) in the immune system of patients after the removal of the spleen. OBJECTIVES: The aim of the present study was to analyze possible changes in CD4+ lymphocyte T subsets, especially Treg and Th17, in patients who had undergone splenectomy. MATERIAL AND METHODS: The study included a group of 67 male patients (41...
May 22, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29790621/generation-and-application-of-human-induced-stem-cell-memory-t-it-scm-cells-for-adoptive-immunotherapy
#19
Taisuke Kondo, Yuuki Imura, Shunsuke Chikuma, Sana Hibino, Setsuko Omata-Mise, Makoto Ando, Takashi Akanuma, Mana Iizuka, Ryota Sakai, Rimpei Morita, Akihiko Yoshimura
Adoptive T cell therapy is an effective strategy for cancer immunotherapy. However, infused T cells frequently become functionally exhausted, and consequently offer a poor prognosis after transplantation into patients. Adoptive transfer of tumor antigen-specific stem cell memory T (TSCM ) cells is expected to overcome this shortcoming since TSCM cells are close to naïve T cells, but are also highly proliferative, long-lived, and produce a large number of effector T cells in response to antigen stimulation...
May 23, 2018: Cancer Science
https://www.readbyqxmd.com/read/29790576/memory-t-cell-subsets-in-healthy-gingiva-and-periodontitis-tissues
#20
Rangsini Mahanonda, Chantrakorn Champaiboon, Keskanya Subbalekha, Noppadol Sa-Ard-Iam, Arsarn Yongyuth, Benjarat Isaraphithakkul, Pimprapa Rerkyen, Orawan Charatkulangkun, Sathit Pichyangkul
BACKGROUND: In the gingival sulcus, effective and balanced innate and adaptive immune responses against subgingival plaque microbiome are crucial to maintain immune homeostasis. In this study, we investigated the memory T cell subsets in healthy gingiva and periodontitis tissues. METHODS: Anatomical localization of T cells (CD3+ , CD4+ , and CD8+ ) in healthy gingiva and periodontitis tissues were examined immunohistochemically. Subsets of memory T cells from isolated gingival cells were analyzed by flow cytometry using a cocktail of monoclonal antibodies (anti-CD69, anti-CD103, anti-CD45RA, anti-CCR7, anti-CD28, and anti-CD95)...
May 23, 2018: Journal of Periodontology
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