Volume 7, Issue 4 (10-2019)                   JoMMID 2019, 7(4): 107-115 | Back to browse issues page


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Namazi F, Bolhassani A, Sadat S M, Irani S. In vitro Delivery of HIV-1 Nef Antigen by Histidine-rich nona-arginine and Latarcin 1 peptide. JoMMID. 2019; 7 (4) :107-115
URL: http://jommid.pasteur.ac.ir/article-1-210-en.html
Department of Hepatitis and AIDS, Pasteur Institute of Iran, Tehran, Iran
Abstract:   (2022 Views)
Introduction: The Nef accessory protein is an attractive antigenic candidate in the development of HIV-1 DNA- or protein-based vaccines. The most crucial disadvantage of DNA and protein-based vaccines is their low immunogenicity, which can be improved by cell-penetrating peptides (CPPs) as effective carrier molecules. Methods: In this study, the HIV-1 Nef protein was generated in the Escherichia coli expression system for in vitro delivery using a novel CPP, Latarcin 1 peptide, in a non-covalent manner. Also, the Histidine-rich nona-arginine peptide was utilized to transfer the HIV-1 Nef gene. The size, morphology, and zeta potential of the complexes were evaluated by scanning electron microscopy (SEM) and Zetasizer. The efficiency of cell transfection was studied using a fluorescence microscopy and flow cytometry for the DNA/CPP complexes and western blot analysis for the protein/CPP complexes. Results: The Nef protein generated in the BL21 strain migrated as a dominant band of ~30 kDa in SDS-PAGE. The SEM data confirmed the formation of stable complexes with a size below 200 nm. MTT assay demonstrated that the complexes did not represent any considerable cytotoxic effect compared to untreated HEK-293T cells. The results of fluorescence microscopy, flow cytometry, and western blotting revealed that the Nef DNA and protein constructs could be significantly transfected into HEK-293T cell line using these CPPs. Conclusion: These data suggest that the Histidine-rich nona-arginine peptide and Latarcin 1 peptide as CPPs can be considered as a promising approach in the development of the HIV-1 vaccine for gene or protein delivery. 
Full-Text [PDF 893 kb]   (115 Downloads)    
Type of Study: Original article | Subject: Other
Received: 2019/07/27 | Accepted: 2019/10/14 | Published: 2020/03/12

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