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الدكتور فهد بن ناصر المجحدي

Professor

المشرف على كرسي ابحاث كوفيد 19

كلية العلوم
قسم النبات و الاحياء الدقيقة / مكتب 2ب 66 الدور الثاني كلية العلوم مبنى 5
المنشورات
مقال فى مجلة
2019

Naked DNA immunization with full-length attachment gene of human respiratory syncytial virus induces safe and protective immune response

attachment glycoprotein challenge DNA vaccination human respiratory syncytial virus

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.

اسم الناشر
Acta virologica
رقم المجلد
62
الصفحات
137-146
مزيد من المنشورات
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تم النشر فى:
Journal of King Saud University - Science
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بواسطة Saeed U, Piracha ZZ, Alrokayan S, Hussain T, Almajhdi FN, Waheed Y.
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تم النشر فى:
Microorganisms
publications

MMTV causes mammary tumors in mice, and it is associated with invasive and aggressive forms of breast cancer in humans. However, the underlying mechanisms are yet unknown. We aimed to determine…

بواسطة Hafiz Fawad Khalid a, Sadia Bibi b, Amjad Ali c, Nida Fawad d, Muhammad Usman Shams e, Wafa Idrees f, Muhammad Waqas c g, Shazia Rafique h, Abbas khan i, Faizullah Khan j, Fahad Nasser Almajhd
2023
تم النشر فى:
Journal of Infection and Public Health