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antibody design

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https://www.readbyqxmd.com/read/28430795/igm-antibodies-to-oxidized-phosphatidylserine-as-protection-markers-in-cardiovascular-disease-among-60-year-olds
#1
Johan Frostegård, Jun Su, Sudhir Sing, Xiang Hua, Max Vikström, Karin Leander, Bruna Gigante, Ulf de Faire, Anna G Frostegård
OBJECTIVE: Phosphatidylserine is exposed on apoptotic cells and is prone to oxidation (OxPS). Here we analyze the association of IgM antibodies against OxPS (anti-OxPS) with the risk of cardiovascular disease (CVD). METHODS: Among sixty-year olds from Stockholm County in Sweden, previously screened for cardiovascular risk factors (2039 men, 2193 women), there were 210 incident CVD-cases identified during a 5-year follow-up. Using a nested case-control design, 622 age- and sex-matched controls were selected...
2017: PloS One
https://www.readbyqxmd.com/read/28430413/bioimaging-with-macromolecular-probes-incorporating-multiple-bodipy-fluorophores
#2
Ek Raj Thapaliya, Yang Zhang, Pravat Dhakal, Adrienne S Brown, James N Wilson, Kevin Collins, Françisco M Raymo
Seven macromolecular constructs incorporating multiple borondipyrromethene (BODIPY) fluorophores along a common poly(methacrylate) backbone with decyl and oligo(ethylene glycol) side chains were synthesized. The hydrophilic oligo(ethylene glycol) components impose solubility in aqueous environment on the overall assembly. The hydrophobic decyl chains insulate effectively the fluorophores from each other to prevent detrimental interchromophoric interactions and preserve their photophysical properties. As a result, the brightness of these multicomponent assemblies is approximately three times greater than that of a model BODIPY monomer...
April 21, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28429896/production-of-a-conjugate-between-the-rk346-antigen-from-leishmania-infantum-and-the-horseradish-peroxidase-c-for-the-detection-of-rk346-antibodies
#3
Juan Rengifo-González, Yollyseth Medina-Mora, Sasha Silva-Barrios, María Elizabeth Márquez-Contreras, María Tibisay Ruiz, Ana J Cáceres, Juan Luis Concepción, Wilfredo Quiñones
It was designed and characterized a reporter system to be captured by an- tibodies bound to ELISA plates. The system was designed with the rK346 from Leishmania infantum, a highly antigenic and specific protein. The rK346 was coupled to the horseradish peroxidase C (HRPc) from Armoracia rusticana using glutaraldehyde or sulfo-SMCC. Gluta- raldehyde conjugation was performed in two steps. Separation of conjugates was carried out using a Sepharose S-200 in size exclusion chromatography (SEC); fractions were analyzed via HRPc activity and through ELISA plates sensitized with polyclonal anti-rK346 IgG puri- fied from rabbit serum...
June 2016: Investigación Clínica
https://www.readbyqxmd.com/read/28429225/design-of-chemical-conjugate-for-targeted-therapy-of-multiple-sclerosis-based-of-constant-fragment-of-human-antibody-heavy-chain-and-peptoid-analog-of-autoantigen-mog35-55
#4
Y A Lomakin, A V Stepanov, D S Balabashin, N A Ponomarenko, I V Smirnov, A A Belogurov
Elimination of B cells producing autoantibodies to neuroantigens is considered as beneficial in the treatment of multiple sclerosis. Myelin oligodendrocyte glycoprotein (MOG) is a significant autoantigen in multiple sclerosis. It was shown that MOG-like peptoid AMogP3 can bind autoantibodies produced by pathological lymphocytes. We propose a structure of an innovative drug for targeted elimination of the pool of autoreactive B cells responsible for multiple sclerosis pathogenesis; this compound is a complex of peptoid AMogP3 with Fc fragment of human immunoglobulin...
April 21, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28428193/pd-l1-expression-in-melanoma-a-quantitative-immunohistochemical-antibody-comparison
#5
Joel C Sunshine, Peter Nguyen, Genevieve Kaunitz, Tricia Cottrell, Sneha Berry, Jessica Esandrio, Haiying Xu, Aleksandra Ogurtsova, Karen R Bleich, Toby C Cornish, Evan J Lipson, Robert A Anders, Janis Taube
PD-L1 expression in the pre-treatment tumor microenvironment enriches for response to anti-PD-1/PD-L1 therapies. The purpose of this study was to quantitatively compare the performance of five monoclonal anti-PD-L1 antibodies used in recent landmark publications.  <br /><br />Experimental Design: PD-L1 immunohistochemistry (IHC) was performed on thirty-four formalin-fixed paraffin-embedded archival melanoma samples using the 5H1, SP142, 28-8, 22C3 and SP263 clones.  The percentage of total cells (including melanocytes and immune cells) demonstrating cell surface PD-L1 staining, as well as intensity measurements/H-scores, were assessed for each melanoma specimen using a computer-assisted platform...
April 20, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28427960/construct-and-expression-of-recombinant-domains-i-ii-of-dengue-virus-2-and-its-efficacy-to-evaluate-immune-response-in-endemic-area-possible-use-in-prognosis
#6
Alfredo Eduardo Montes-Gómez, Hector Vivanco-Cid, José Bustos-Arriaga, Mussaret Bano Zaidi, Jazmin Garcia Machorro, Benito Gutierrez-Castañeda, Leticia Cedillo-Barron
The envelope (E) protein from DENV, contain three functional and structural domains (DI, DII and DIII). Some studies suggest that neutralizing antibodies during natural DENV infection are predominantly against DI and DII, in contrast, low proportion of the antibodies were against DIII. Thus it is necessary to establish the proportion of human antibodies against DENV E protein that bind to DI and DII during the normal course of infection; as an indicator of the quality of the antibody response and to further design new vaccine candidates for DENV...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427948/comprehensive-characterization-of-humoral-correlates-of-human-immunodeficiency-virus-1-superinfection-acquisition-in-high-risk-kenyan-women
#7
Keshet Ronen, Adam S Dingens, Susan M Graham, Walter Jaoko, Kishor Mandaliya, R Scott McClelland, Julie Overbaugh
HIV-1 superinfection, in which an infected individual acquires a second HIV-1 infection from a different partner, is one of the only settings in which HIV acquisition occurs in the context of a pre-existing immune response to natural HIV infection. There is evidence that initial infection provides some protection from superinfection, particularly after 6months of initial infection, when development of broad immunity occurs. Comparison of the immune response of superinfected individuals at the time of superinfection acquisition to that of individuals who remain singly infected despite continued exposure can shed light on immune correlates of HIV acquisition to inform prophylactic vaccine design...
April 7, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28427904/leishmania-donovani-tyrosyl-trna-synthetase-structure-in-complex-with-a-tyrosyl-adenylate-analog-and-comparisons-with-human-and-protozoan-counterparts
#8
Ximena Barros-Álvarez, Keshia M Kerchner, Cho Yeow Koh, Stewart Turley, Els Pardon, Jan Steyaert, Ranae M Ranade, J Robert Gillespie, Zhongsheng Zhang, Christophe L M J Verlinde, Erkang Fan, Frederick S Buckner, Wim G J Hol
The crystal structure of Leishmania donovani tyrosyl-tRNA synthetase (LdTyrRS) in complex with a nanobody and the tyrosyl adenylate analog TyrSA was determined at 2.75 Å resolution. Nanobodies are the variable domains of camelid heavy chain-only antibodies. The nanobody makes numerous crystal contacts and in addition reduces the flexibility of a loop of LdTyrRS. TyrSA is engaged in many interactions with active site residues occupying the tyrosine and adenine binding pockets. The LdTyrRS polypeptide chain consists of two pseudo-monomers, each consisting of two domains...
April 17, 2017: Biochimie
https://www.readbyqxmd.com/read/28427432/anti-human-platelet-antigen-hpa-1a-antibodies-may-affect-trophoblast-functions-crucial-for-placental-development-a-laboratory-study-using-an-in-vitro-model
#9
Mariana Eksteen, Gøril Heide, Heidi Tiller, Yan Zhou, Nora Hersoug Nedberg, Inigo Martinez-Zubiaurre, Anne Husebekk, Bjørn R Skogen, Tor B Stuge, Mette Kjær
BACKGROUND: Fetal and neonatal alloimmune thrombocytopenia (FNAIT) is a bleeding disorder caused by maternal antibodies against paternal human platelet antigens (HPAs) on fetal platelets. Antibodies against HPA-1a are accountable for the majority of FNAIT cases. We have previously shown that high levels of maternal anti-HPA-1a antibodies are associated with clinically significant reduced birth weight in newborn boys. Chronic inflammatory placental lesions are associated with increased risk of reduced birth weight and have previously been reported in connection with FNAIT pregnancies...
April 21, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28427323/detection-of-qtl-for-traits-related-to-adaptation-to-sub-optimal-climatic-conditions-in-chickens
#10
Ching-Yi Lien, Michèle Tixier-Boichard, Shih-Wen Wu, Woei-Fuh Wang, Chen Siang Ng, Chih-Feng Chen
BACKGROUND: Growth traits can be used as indicators of adaptation to sub-optimal conditions. The current study aimed at identifying quantitative trait loci (QTL) that control performance under variable temperature conditions in chickens. METHODS: An F2 population was produced by crossing the Taiwan Country chicken L2 line (selected for body weight, comb area, and egg production) with an experimental line of Rhode Island Red layer R- (selected for low residual feed consumption)...
April 20, 2017: Genetics, Selection, Evolution: GSE
https://www.readbyqxmd.com/read/28426914/recommended-dose-of-idarucizumab-may-not-always-be-sufficient-for-sustained-reversal-of-dabigatran
#11
Alexander Simon, Hans Domanovits, Cihan Ay, Gürkan Sengölge, Jerrold H Lewy, Alexander O Spiel
Idarucizumab is a monoclonal antibody fragment designed for reversing the anticoagulant effects of dabigatran. Administration is recommended as two intravenous boluses of 2.5 g within 15 minutes of each other or as a single 5 g bolus. However, in certain situations a second dose of the drug could be necessary. We report the case of a 77-year old man, treated with dabigatran for paroxysmal atrial fibrillation. He presented at our department with acute renal failure, concomitant massive dabigatran accumulation, and subsequent acute gastrointestinal bleeding...
April 20, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28425638/de-novo-design-of-peptide-binding-antibodies
#12
(no author information available yet)
No abstract text is available yet for this article.
June 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28424162/pembrolizumab-in-patients-with-chronic-lymphocytic-leukemia-with-richter-s-transformation-and-relapsed-cll
#13
Wei Ding, Betsy R LaPlant, Timothy G Call, Sameer A Parikh, Jose F Leis, Rong He, Tait D Shanafelt, Sutapa Sinha, Jennifer Le-Rademacher, Andrew L Feldman, Thomas M Habermann, Thomas E Witzig, Gregory A Wiseman, Yi Lin, Erik Asmus, Grzegorz S Nowakowski, Michael J Conte, Deborah A Bowen, Casey N Aitken, Daniel L Van Dyke, Patricia T Greipp, Xin Liu, Xiaosheng Wu, Henan Zhang, Charla R Secreto, Shulan Tian, Esteban Braggio, Linda E Wellik, Ivana Micallef, David S Viswanatha, Huihuang Yan, Asher A Chanan-Khan, Neil E Kay, Haidong Dong, Stephen M Ansell
CLL patients progressed early on ibrutinib often develop Richter's transformation (RT) with short survival about 4 months. Preclinical studies suggest that programmed death 1 (PD-1) pathway is critical to inhibit immune surveillance in CLL. This phase 2 study MC1485 (NCT02332980) was designed to test the efficacy and safety of pembrolizumab, a humanized PD-1-blocking antibody, at a dose of 200 mg every 3 weeks in relapsed and transformed CLL. Twenty-five patients including 16 relapsed CLL and 9 RT (all proven diffuse large cell lymphoma) patients were enrolled and 60% received prior ibrutinib...
April 19, 2017: Blood
https://www.readbyqxmd.com/read/28423552/enhanced-antitumor-effects-by-combining-an-il-12-anti-dna-fusion-protein-with-avelumab-an-anti-pd-l1-antibody
#14
Jonathan K Fallon, Amanda J Vandeveer, Jeffrey Schlom, John W Greiner
The combined therapeutic potential of an immunocytokine designed to deliver IL-12 to the necrotic regions of solid tumors with an anti-PD-L1 antibody that disrupts the immunosuppressive PD-1/PD-L1 axis yielded a combinatorial benefit in multiple murine tumor models. The murine version of the immunocytokine, NHS-muIL12, consists of an antibody (NHS76) recognizing DNA/DNA-histone complexes, fused with two molecules of murine IL-12 (NHS-muIL12). By its recognition of exposed DNA, NHS-muIL12 targets IL-12 to the necrotic portions of tumors; it has a longer plasma half-life and better antitumor efficacy against murine tumors than recombinant murine IL-12...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28423310/c-myb-regulates-the-t-bet-dependent-differentiation-program-in-b-cells-to-coordinate-antibody-responses
#15
Dana Piovesan, Jessica Tempany, Andrea Di Pietro, Inge Baas, Callisthenis Yiannis, Kristy O'Donnell, Yunshun Chen, Victor Peperzak, Gabrielle T Belz, Charles R Mackay, Gordon K Smyth, Joanna R Groom, David M Tarlinton, Kim L Good-Jacobson
Humoral immune responses are tailored to the invading pathogen through regulation of key transcription factors and their networks. This is critical to establishing effective antibody-mediated responses, yet it is unknown how B cells integrate pathogen-induced signals to drive or suppress transcriptional programs specialized for each class of pathogen. Here, we detail the key role of the transcription factor c-Myb in regulating the T-bet-mediated anti-viral program. Deletion of c-Myb in mature B cells significantly increased serum IgG2c and CXCR3 expression by upregulating T-bet, normally suppressed during Th2-cell-mediated responses...
April 18, 2017: Cell Reports
https://www.readbyqxmd.com/read/28423045/characterization-of-antennal-sensilla-larvae-morphology-and-olfactory-genes-of-melipona-scutellaris-stingless-bee
#16
Washington João de Carvalho, Patrícia Tieme Fujimura, Ana Maria Bonetti, Luiz Ricardo Goulart, Kevin Cloonan, Neide Maria da Silva, Ester Cristina Borges Araújo, Carlos Ueira-Vieira, Walter S Leal
There is growing evidence in the literature suggesting that caste differentiation in the stingless bee, Melipona scutellaris, and other bees in the genus Melipona, is triggered by environmental signals, particularly a primer pheromone. With the proper amount of food and a chemical stimulus, 25% of females emerge as queens, in agreement with a long-standing "two loci/two alleles model" proposed in the 1950s. We surmised that these larvae must be equipped with an olfactory system for reception of these chemical signals...
2017: PloS One
https://www.readbyqxmd.com/read/28422790/particle-based-delivery-of-the-hiv-envelope-protein
#17
Benedikt Asbach, Ralf Wagner
PURPOSE OF REVIEW: A major focus in HIV vaccine research is the development of suitable antigens that elicit broadly neutralizing antibody responses targeting HIV's envelope protein (Env). Delivery of Env in a repetitive manner on particle-based carriers allows higher avidity interactions and is therefore expected to efficiently engage B cells, thus leading to affinity maturation that results in superior antibody responses characterized by improved breadth, potency, and durability. This review summarizes current work that is evaluating diverse types of such particulate carriers for Env delivery...
May 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28422789/antigp41-membrane-proximal-external-region-antibodies-and-the-art-of-using-the-membrane-for-neutralization
#18
Nichole Cerutti, Juan Luis Loredo-Varela, Christophe Caillat, Winfried Weissenhorn
PURPOSE OF REVIEW: We summarize the latest research on the progress to understand the neutralizing epitopes present within the membrane proximal external region (MPER) of the HIV-1 fusion protein subunit gp41. RECENT FINDINGS: The HIV-1 fusion protein subunit gp41 contains a highly conserved sequence that is essential for membrane fusion and targeted by broadly neutralizing antibodies such as 2F5, 4E10, Z13e1, and 10E8. These antibodies recognize a linear gp41 epitope with high affinity, but require additional hydrophobic sequences present in their heavy chain CDR3 for neutralization...
May 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28422788/stabilized-hiv-1-envelope-glycoprotein-trimers-for-vaccine-use
#19
Max Medina-Ramírez, Rogier W Sanders, Quentin J Sattentau
PURPOSE OF REVIEW: To provide an update on the latest developments in the field of HIV-1 antibody-based soluble envelope glycoprotein (Env) trimer design for vaccine use. RECENT FINDINGS: The development of soluble native-like HIV-1 Env trimer immunogens has moved the field of antibody-based vaccine design forward dramatically over the past few years with refinement of various stabilizing approaches. However, despite this progress, significant challenges remain...
May 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28422787/how-hiv-1-entry-mechanism-and-broadly-neutralizing-antibodies-guide-structure-based-vaccine-design
#20
Marie Pancera, Anita Changela, Peter D Kwong
PURPOSE OF REVIEW: An HIV-1 vaccine that elicits broadly neutralizing antibodies (bNAbs) remains to be developed. Here, we review how knowledge of bNAbs and HIV-1 entry mechanism is guiding the structure-based design of vaccine immunogens and immunization regimens. RECENT FINDINGS: Isolation of bNAbs from HIV-1-infected donors has led to an unprecedented understanding of the sites of vulnerability that these antibodies target on the HIV-1 envelope (Env) as well as of the immunological pathways that these antibody lineages follow to develop broad and potent neutralization...
May 2017: Current Opinion in HIV and AIDS
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