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Rudolph S, Klein AN, Tusche M, Schlosser C, Elfgen A, Brener O, Teunissen C, Gremer L, Funke SA, Kutzsche J, Willbold D. Competitive Mirror Image Phage Display Derived Peptide Modulates Amyloid Beta Aggregation and Toxicity. PLoS One 2016; 11:e0147470. [PMID: 26840229 PMCID: PMC4740492 DOI: 10.1371/journal.pone.0147470] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 01/04/2016] [Indexed: 11/29/2022] Open
Abstract
Alzheimer´s disease is the most prominent type of dementia and currently no causative treatment is available. According to recent studies, oligomeric species of the amyloid beta (Aβ) peptide appear to be the most toxic Aβ assemblies. Aβ monomers, however, may be not toxic per se and may even have a neuroprotective role. Here we describe a competitive mirror image phage display procedure that allowed us to identify preferentially Aβ1–42 monomer binding and thereby stabilizing peptides, which destabilize and thereby eliminate toxic oligomer species. One of the peptides, called Mosd1 (monomer specific d-peptide 1), was characterized in more detail. Mosd1 abolished oligomers from a mixture of Aβ1–42 species, reduced Aβ1–42 toxicity in cell culture, and restored the physiological phenotype in neuronal cells stably transfected with the gene coding for human amyloid precursor protein.
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Affiliation(s)
- Stephan Rudolph
- Institute of Complex Systems, Structural Biochemistry (ICS-6), Research Centre Jülich, 52425 Jülich, Germany
| | - Antonia Nicole Klein
- Institute of Complex Systems, Structural Biochemistry (ICS-6), Research Centre Jülich, 52425 Jülich, Germany
| | - Markus Tusche
- Institute of Complex Systems, Structural Biochemistry (ICS-6), Research Centre Jülich, 52425 Jülich, Germany
| | - Christine Schlosser
- Institute of Complex Systems, Structural Biochemistry (ICS-6), Research Centre Jülich, 52425 Jülich, Germany
| | - Anne Elfgen
- Institute of Complex Systems, Structural Biochemistry (ICS-6), Research Centre Jülich, 52425 Jülich, Germany
| | - Oleksandr Brener
- Institute of Complex Systems, Structural Biochemistry (ICS-6), Research Centre Jülich, 52425 Jülich, Germany
- Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
| | - Charlotte Teunissen
- Neurochemistry Laboratory and Biobank, VU University Medical Center Amsterdam, The Netherlands
| | - Lothar Gremer
- Institute of Complex Systems, Structural Biochemistry (ICS-6), Research Centre Jülich, 52425 Jülich, Germany
- Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
| | - Susanne Aileen Funke
- Institute of Complex Systems, Structural Biochemistry (ICS-6), Research Centre Jülich, 52425 Jülich, Germany
- Fakultät Angewandte Naturwissenschaften, Hochschule für angewandte Wissenschaften Coburg, 96450 Coburg, Germany
| | - Janine Kutzsche
- Institute of Complex Systems, Structural Biochemistry (ICS-6), Research Centre Jülich, 52425 Jülich, Germany
| | - Dieter Willbold
- Institute of Complex Systems, Structural Biochemistry (ICS-6), Research Centre Jülich, 52425 Jülich, Germany
- Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
- * E-mail:
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Chikaev AN, Bakulina AY, Burdick RC, Karpenko LI, Pathak VK, Ilyichev AA. Selection of peptide mimics of HIV-1 epitope recognized by neutralizing antibody VRC01. PLoS One 2015; 10:e0120847. [PMID: 25785734 PMCID: PMC4364665 DOI: 10.1371/journal.pone.0120847] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Accepted: 01/26/2015] [Indexed: 12/24/2022] Open
Abstract
The ability to induce anti-HIV-1 antibodies that can neutralize a broad spectrum of viral isolates from different subtypes seems to be a key requirement for development of an effective HIV-1 vaccine. The epitopes recognized by the most potent broadly neutralizing antibodies that have been characterized are largely discontinuous. Mimetics of such conformational epitopes could be potentially used as components of a synthetic immunogen that can elicit neutralizing antibodies. Here we used phage display technology to identify peptide motifs that mimic the epitope recognized by monoclonal antibody VRC01, which is able to neutralize up to 91% of circulating primary isolates. Three rounds of biopanning were performed against 2 different phage peptide libraries for this purpose. The binding specificity of selected phage clones to monoclonal antibody VRC01 was estimated using dot blot analysis. The putative peptide mimics exposed on the surface of selected phages were analyzed for conformational and linear homology to the surface of HIV-1 gp120 fragment using computational analysis. Corresponding peptides were synthesized and checked for their ability to interfere with neutralization activity of VRC01 in a competitive inhibition assay. One of the most common peptides selected from 12-mer phage library was found to partially mimic a CD4-binding loop fragment, whereas none of the circular C7C-mer peptides was able to mimic any HIV-1 domains. However, peptides identified from both the 12-mer and C7C-mer peptide libraries showed rescue of HIV-1 infectivity in the competitive inhibition assay. The identification of epitope mimics may lead to novel immunogens capable of inducing broadly reactive neutralizing antibodies.
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Affiliation(s)
- Anton N. Chikaev
- State Research Center of Virology and Biotechnology VECTOR, Koltsovo, Novosibirsk region, 630559, Russia
- * E-mail:
| | - Anastasiya Yu. Bakulina
- State Research Center of Virology and Biotechnology VECTOR, Koltsovo, Novosibirsk region, 630559, Russia
| | - Ryan C. Burdick
- HIV Drug Resistance Program, National Cancer Institute-Frederick, Viral Mutation Section, Frederick, Maryland, 21702, United States of America
| | - Larisa I. Karpenko
- State Research Center of Virology and Biotechnology VECTOR, Koltsovo, Novosibirsk region, 630559, Russia
| | - Vinay K. Pathak
- HIV Drug Resistance Program, National Cancer Institute-Frederick, Viral Mutation Section, Frederick, Maryland, 21702, United States of America
| | - Alexander A. Ilyichev
- State Research Center of Virology and Biotechnology VECTOR, Koltsovo, Novosibirsk region, 630559, Russia
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Liu F, Mayer JP. Protein Chemical Synthesis in Drug Discovery. PROTEIN LIGATION AND TOTAL SYNTHESIS I 2014; 362:183-228. [DOI: 10.1007/128_2014_598] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Tuccillo FM, Palmieri C, Fiume G, de Laurentiis A, Schiavone M, Falcone C, Iaccino E, Galandrini R, Capuano C, Santoni A, D'Armiento FP, Arra C, Barbieri A, Dal Piaz F, Venzon D, Bonelli P, Buonaguro FM, Scala I, Mallardo M, Quinto I, Scala G. Cancer-associated CD43 glycoforms as target of immunotherapy. Mol Cancer Ther 2013; 13:752-62. [PMID: 24356816 DOI: 10.1158/1535-7163.mct-13-0651] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
CD43 is a sialoglycosylated membrane protein that is involved in cell proliferation and differentiation. CD43 glycoforms that are recognized by the UN1 monoclonal antibody (mAb) were expressed in lymphoblastoid T-cell lines and solid tumors, such as breast, colon, gastric, and squamous cell lung carcinomas, while unexpressed in the normal counterparts. The cancer association of UN1/CD43 epitope suggested the possibility to use the UN1 mAb for tumor diagnosis and therapy. In this study, we show that the UN1 mAb was endowed with antitumor activity in vivo because its passive transfer inhibited the growth of UN1-positive HPB-ALL lymphoblastoid T cells in mice. Furthermore, we demonstrate that tumor inhibition was due to UN1 mAb-dependent natural killer-mediated cytotoxicity. By screening a phage-displayed random peptide library, we identified the phagotope 2/165 as a mimotope of the UN1 antigen, as it harbored a peptide sequence that was specifically recognized by the UN1 mAb and inhibited the binding of the UN1 mAb to UN1-positive tumor cells. On the basis of sequence homology with the extracellular region of CD43 (amino acids 64 to 83), the 2/165 peptide sequence was likely mimicking the protein core of the UN1/CD43 epitope. When used as vaccine in mice, the 2/165 phagotope raised antibodies against the UN1/CD43 antigen, indicating that the 2/165 phagotope mimicked the UN1 antigen structure, and could represent a novel immunogen for cancer immunotherapy. These findings support the feasibility of using monoclonal antibodies to identify cancer-associated mimotopes for immunotherapy.
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Affiliation(s)
- Franca Maria Tuccillo
- Corresponding Authors: Franca Maria Tuccillo, Laboratory of Molecular Biology and Viral Oncogenesis, Istituto Nazionale per lo Studio e la Cura dei Tumori "Fondazione G. Pascale", IRCCS, via Mariano Semmola, 80131, Naples, Italy.
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