کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10970247 | 1103039 | 2010 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modified H5 promoter improves stability of insert genes while maintaining immunogenicity during extended passage of genetically engineered MVA vaccines
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
ایمنی شناسی و میکروب شناسی
ایمونولوژی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We have engineered recombinant (r) Modified Vaccinia Ankara (MVA) to express multiple antigens under the control of either of two related vaccinia synthetic promoters (pSyn) with early and late transcriptional activity or the modified H5 (mH5) promoter which has predominant early activity. We sequentially passaged these constructs and analyzed their genetic stability by qPCR, and concluded that rMVA expressing multiple antigens using the mH5 promoter exhibit remarkable genetic stability and maintain potent immunogenicity after serial passage. In contrast, rMVA expressing antigens using engineered vaccinia synthetic E/L (pSyn I or II) promoters are genetically unstable. Progressive accumulation of antigen loss variants resulted in a viral preparation with lower immunogenicity after serial passage. Metabolic labeling, followed by cold chase revealed little difference in stability of proteins expressed from mH5 or pSyn promoter constructs. We conclude that maintenance of genetic stability which is achieved using mH5, though not with pSyn promoters, is linked to timing, not the magnitude of expression levels of foreign antigen, which is more closely associated with immunogenicity of the vaccine.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vaccine - Volume 28, Issue 6, 10 February 2010, Pages 1547-1557
Journal: Vaccine - Volume 28, Issue 6, 10 February 2010, Pages 1547-1557
نویسندگان
Zhongde Wang, Joy Martinez, Wendi Zhou, Corinna La Rosa, Tumul Srivastava, Anindya Dasgupta, Ravindra Rawal, Zhongqui Li, William J. Britt, Don Diamond,