scholarly journals Generation of Recombinant Antibodies against the beta-(1,6)-Branched beta-(1,3)-D-Glucan Schizophyllan from Immunized Mice via Phage Display

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Jörn Josewski ◽  
Sabine Buchmeier ◽  
André Frenzel ◽  
Philip Tinnefeld ◽  
Stefan Dübel ◽  
...  
Keyword(s):  
Phage Display ◽  
Schizophyllum Commune ◽  
Temperature Stability ◽  
Helical Structure ◽  
Recombinant Antibodies ◽  
Phage Display Library ◽  
Effective Concentration ◽  
Macromolecular Structure ◽  
Half Maximal Effective Concentration ◽  
Triple Helical Structure

beta-(1,6)-Branched beta-(1,3)-D-glucans like schizophyllan from the basidiomycete Schizophyllum commune excite various immunostimulatory effects and have been clinically tested as adjuvants. Some of the glucans are also applicable in food or petrol industry due to their viscosity and temperature stability in aqueous solution. Antibodies against these glucans could be used as tool for analysis of glucan preparations or for further research of its bioactivity. Therefore, an immune phage display library was constructed from mice immunized with schizophyllan. Three recombinant monoclonal antibodies were isolated from this library by affinity selection (panning) on schizophyllan. The half-maximal effective concentration (EC50) values for those antibodies varied between 16.4 ng mL−1 and 21.3 ng mL−1. The clones showed binding specificity not only for schizophyllan but also for other beta-(1,6)-branched beta-(1,3)-D-glucans of similar macromolecular structure. Denaturation of the secondary structure led to a reduced antibody binding, indicating an epitope requiring the correct conformation of the triple helical structure of the glucans.

scholarly journals Selection of Recombinant Antibodies Specific for Pathogenic Streptococcus suis by Subtractive Phage Display

2000 ◽  
Vol 68 (7) ◽  
pp. 3949-3955 ◽  
Author(s):  
Astrid de Greeff ◽  
Loek van Alphen ◽  
Hilde E. Smith
Keyword(s):  
Phage Display ◽  
Selection Procedure ◽  
Surface Protein ◽  
Streptococcus Suis ◽  
Recombinant Antibodies ◽  
Phage Display Library ◽  
Phage Antibody ◽  
Phage Antibodies ◽  
Antibody Phage Display ◽  
Protein Components

ABSTRACT A semisynthetic antibody phage display library was used to select recombinant antibodies directed against surface components of a pathogenic strain of Streptococcus suis serotype 2 and against extracellular factor (EF), a protein known to be exclusively associated with pathogenic S. suis serotype 2 strains. Three distinct monoclonal phage antibodies directed against conformational epitopes of surface protein components of S. suis were selected. In addition, three different monoclonal phage antibodies were isolated that recognized EF. To isolate antibody fragments that recognize epitopes specific for a pathogenic S. suis serotype 2 strain, compared to a nonpathogenic serotype 2 strain, we applied a subtractive selection procedure. With this procedure, only one distinct phage antibody was found, and it was shown to be directed against EF. This demonstrates the selectivity of the applied procedure and confirms that EF is indeed differentially expressed by pathogenic and nonpathogenic strains. It also shows that EF is a very dominant antigen in phage antibody selections.

scholarly journals Mimotopes for Mycotoxins Diagnosis Based on Random Peptides or Recombinant Antibodies from Phage Library

Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7652
Author(s):  
Wei Sun ◽  
Yan Zhang ◽  
Zhigang Ju
Keyword(s):  
Phage Display ◽  
Recombinant Antibody ◽  
Recombinant Antibodies ◽  
Phage Display Library ◽  
Ease Of Use ◽  
Phage Library ◽  
Phage Display Technology ◽  
Random Peptide ◽  
Display Technology

Mycotoxins, the small size secondary metabolites of fungi, have posed a threat to the safety of medicine, food and public health. Therefore, it is essential to create sensitive and effective determination of mycotoxins. Based on the special affinity between antibody and antigen, immunoassay has been proved to be a powerful technology for the detection of small analytes. However, the tedious preparation and instability of conventional antibodies restrict its application on easy and fast mycotoxins detection. By virtue of simplicity, ease of use, and lower cost, phage display library provides novel choices for antibodies or hapten conjugates, and lead random peptide or recombinant antibody to becoming the promising and environmental friendly immune-reagents in the next generation of immunoassays. This review briefly describes the latest developments on mycotoxins detection using M13 phage display, mainly focusing on the recent applications of phage display technology employed in mycotoxins detection, including the introduction of phage and phage display, the types of phage displayed peptide/recombinant antibody library, random peptides/recombinant antibodies-based immunoassays, as well as simultaneous determination of multiple mycotoxins.

Selection and characterization of single-chain recombinant antibodies against spring viraemia of carp virus from mouse phage display library

2013 ◽  
Vol 194 (1-2) ◽  
pp. 178-184 ◽  
Author(s):  
Hong Liu ◽  
Xiaocong Zheng ◽  
Feng Zhang ◽  
Li Yu ◽  
Xiaohua Zhang ◽  
...  
Keyword(s):  
Phage Display ◽  
Recombinant Antibodies ◽  
Phage Display Library ◽  
Single Chain

scholarly journals Detection of Cystic Fibrosis Serological Biomarkers Using a T7 Phage Display Library

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Harvinder Talwar ◽  
Samer Najeeb Hanoudi ◽  
Andreea Geamanu ◽  
Dana Kissner ◽  
Sorin Draghici ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Phage Display ◽  
Phage Display Library ◽  
T7 Phage Display ◽  
Serological Biomarkers ◽  
T7 Phage

scholarly journals A New Approach to Obtaining Nano-Sized Graphene Oxide for Biomedical Applications

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1327
Author(s):  
Paulina Bolibok ◽  
Bartosz Szymczak ◽  
Katarzyna Roszek ◽  
Artur P. Terzyk ◽  
Marek Wiśniewski
Keyword(s):  
Graphene Oxide ◽  
Biomedical Applications ◽  
Effective Concentration ◽  
New Approach ◽  
Spectral Changes ◽  
Dimethyl Sulfoxide Solution ◽  
Aggregation Processes ◽  
Initial Oxygen ◽  
Half Maximal Effective Concentration ◽  
Nano Size

Graphene oxide (GO) is one of the most exciting and widely used materials. A new method of nanographene oxide (n-GO) formation is presented. The described unique sequence of ultrasonication in dimethyl sulfoxide solution allows us to obtain different sizes of n-GO sheets by controlling the timing of the cutting and re-aggregation processes. The obtained n-GO exhibits only minor spectral changes, mainly due to the formation of S-containing surface groups; thus, it can be concluded that the material is not reduced during the process. Maintaining the initial oxygen functionalities together with the required nano-size (down to 200 nm) and high homogeneity are beneficial for extensive applications of n-GO. Moreover, we prove that the obtained material is evidently biocompatible. The calculated half-maximal effective concentration (EC50) increases by 5-fold, i.e., from 50 to 250 µg/mL, when GO is converted to n-GO. As a consequence, the new n-GO neither disturbs blood flow even in the narrowest capillaries nor triggers a toxic influence in surrounding cells. Thus, it can be a serious candidate for drugs and biomolecule carriers administered systemically.

Production, characterization and in-vitro applications of single-domain antibody against thyroglobulin selected from novel T7 phage display library

2021 ◽  
Vol 492 ◽  
pp. 112990
Author(s):  
Jothivel Kumarasamy ◽  
Samar Kumar Ghorui ◽  
Chandrakala Gholve ◽  
Bharti Jain ◽  
Yogesh Dhekale ◽  
...  
Keyword(s):  
Phage Display ◽  
Phage Display Library ◽  
Single Domain ◽  
Single Domain Antibody ◽  
Domain Antibody ◽  
T7 Phage Display ◽  
T7 Phage

scholarly journals Remdesivir and Ledipasvir among the FDA-Approved Antiviral Drugs Have Potential to Inhibit SARS-CoV-2 Replication

Cells ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 1052
Author(s):  
Rameez Hassan Pirzada ◽  
Muhammad Haseeb ◽  
Maria Batool ◽  
MoonSuk Kim ◽  
Sangdun Choi
Keyword(s):  
Antiviral Drugs ◽  
Effective Concentration ◽  
Nonstructural Proteins ◽  
Rna Dependent Rna Polymerase ◽  
Direct Acting Antiviral ◽  
Rapid Spread ◽  
Half Maximal Effective Concentration ◽  
Dynamics Simulations ◽  
Direct Acting ◽  
Transcription And Replication

The rapid spread of the virus, the surge in the number of deaths, and the unavailability of specific SARS-CoV-2 drugs thus far necessitate the identification of drugs with anti-COVID-19 activity. SARS-CoV-2 enters the host cell and assembles a multisubunit RNA-dependent RNA polymerase (RdRp) complex of viral nonstructural proteins that plays a substantial role in the transcription and replication of the viral genome. Therefore, RdRp is among the most suitable targets in RNA viruses. Our aim was to investigate the FDA approved antiviral drugs having potential to inhibit the viral replication. The methodology adopted was virtual screening and docking of FDA-approved antiviral drugs into the RdRp protein. Top hits were selected and subjected to molecular dynamics simulations to understand the dynamics of RdRp in complex with these drugs. The antiviral activity of the drugs against SARS-CoV-2 was assessed in Vero E6 cells. Notably, both remdesivir (half-maximal effective concentration (EC50) 6.6 μM, 50% cytotoxicity concentration (CC50) > 100 µM, selectivity index (SI) = 15) and ledipasvir (EC50 34.6 μM, CC50 > 100 µM, SI > 2.9) exerted antiviral action. This study highlights the use of direct-acting antiviral drugs, alone or in combination, for better treatments of COVID-19.

Stable heterodimers from remodeling the domain interface of a homodimer using a phage display library

1997 ◽  
Vol 270 (1) ◽  
pp. 26-35 ◽  
Author(s):  
Shane Atwell ◽  
John B.B Ridgway ◽  
James A Wells ◽  
Paul Carter
Keyword(s):  
Phage Display ◽  
Phage Display Library
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