Journal info
|
||
Select Journal
Journals
Bratislava Medical Journal Endocrine Regulations General Physiology and Biophysics Neoplasma Acta Virologica Current articles 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 Studia Psychologica Cardiology Letters Psychológia a patopsych. dieťaťa Kovove Materialy-Metallic Materials Slovenská hudbaWebshop Cart
Your Cart is currently empty.
Info: Your browser does not accept cookies. To put products into your cart and purchase them you need to enable cookies.
Acta Virologica Vol.62, No.2, p.137-146, 2018 |
||
Title: Naked DNA immunization with full-length attachment gene of human respiratory syncytial virus induces safe and protective immune response | ||
Author: M. E. HAMAD, H. M. AMER, M. A. FARRAG, A. H. OSMAN, F. N. ALMAJHDI | ||
Abstract: Development of potent vaccine for human respiratory syncytial virus (HRSV) that confers better protection than natural infection remains a global challenge. Vaccination with naked DNA is considered successful approach for the control of many viral diseases. In this study, the potential of DNA vaccination using full-length attachment gene of HRSV type A Saudi strain cloned in pcDNA3.1+ vector (pcDNA/GA) was evaluated in BALB/c mice. The expression efficiency of pcDNA/GA was first confirmed in HEp-2 cells on RNA and protein levels. Mice immunization with either pcDNA/GA or the positive control formalin-inactivated vaccine (FI-RSV) has generated significant serum antibody concentration in ELISA (7.31±0.418 and 9.76±0.006 µg/ml, respectively) with superior neutralizing activity. Similarly, both immunogens evoked robust HRSV-specific CD8+ T-cell response in ELISPOT assay compared to mice immunized with pcDNA3.1+ vector or saline (negative controls). Challenge of the immunized mice with the wild-type HRSV did not provoke clinical symptoms or mortality in any mice group. On the 7th day post-challenge, mice were euthanized and lungs were extirpated for evaluation of viral load, histopathological changes and cytokine profile. A significant diminish in the viral load and histology score were concluded in lungs of pcDNA/GA immunized mice compared to those immunized with FI-RSV and negative controls. The pulmonary cytokine profile of pcDNA/GA immunized mice displayed notable upregulation of Th1-associated cytokines while that of FI-RSV immunized mice exhibited high levels of Th2-associated cytokines. In conclusion, the DNA vaccine candidate pcDNA/GA has proven prominent efficacy and safety in mouse model, which encourages further evaluation in clinical trials. |
||
Keywords: attachment glycoprotein; challenge; DNA vaccination; human respiratory syncytial virus; mice immunization; T-helper biased response | ||
Published online: 07-Jun-2018 | ||
Year: 2018, Volume: 62, Issue: 2 | Page From: 137, Page To: 146 | |
doi:10.4149/av_2018_203 |
||
|
download file |
|