scholarly journals Epitope Fingerprinting for Recognition of the Polyclonal Serum Autoantibodies of Alzheimer’s Disease

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Luiz Carlos de Oliveira-Júnior ◽  
Fabiana de Almeida Araújo Santos ◽  
Luiz Ricardo Goulart ◽  
Carlos Ueira-Vieira

Autoantibodies (aAb) associated with Alzheimer’s disease (AD) have not been sufficiently characterized and their exact involvement is undefined. The use of information technology and computerized analysis with phage display technology was used, in the present research, to map the epitope of putative self-antigens in AD patients. A 12-mer random peptide library, displayed on M13 phages, was screened using IgG from AD patients with two repetitions. Seventy-one peptides were isolated; however, only 10 were positive using the Elisa assay technique (Elisa Index > 1). The results showed that the epitope regions of the immunoreactive peptides, identified by phage display analysis, were on the exposed surfaces of the proteins. The putative antigens MAST1, Enah, MAO-A, X11/MINT1, HGF, SNX14, ARHGAP 11A, APC, and CENTG3, which have been associated with AD or have functions in neural tissue, may indicate possible therapeutic targets.

1993 ◽  
Vol 293 (3) ◽  
pp. 613-616 ◽  
Author(s):  
I Saggio ◽  
R Laufer

Recombinant biotin-binding phages were affinity-selected from a random peptide library expressed on the surface of filamentous phage. Phage binding to biotinylated proteins was half-maximally inhibited by micromolar concentrations of a monobiotinylated molecule. Sequencing of the peptide inserts of selected phages led to the identification of a previously unknown biotin-binding motif, CXWXPPF(K or R)XXC. A synthetic peptide containing this sequence motif inhibited streptavidin binding to biotinylated BSA with an IC50 of 50 microM. This compound represents the shortest non-avidin biotin-binding peptide identified to date. Our results illustrate that phage display technology can be used to identify novel ligands for a small non-proteinaceous molecule.


Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7652
Author(s):  
Wei Sun ◽  
Yan Zhang ◽  
Zhigang Ju

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.


2016 ◽  
Vol 12 (6) ◽  
pp. 4727-4731 ◽  
Author(s):  
Fei Liu ◽  
Chun-Ling Qi ◽  
Mian Kong ◽  
Ting-Ting Liu ◽  
Lei Li ◽  
...  

2017 ◽  
Vol 484 (3) ◽  
pp. 605-611 ◽  
Author(s):  
Kotaro Sakamoto ◽  
Yusuke Kamada ◽  
Tomoya Sameshima ◽  
Masahiro Yaguchi ◽  
Ayumu Niida ◽  
...  

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