کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9279441 | 1223676 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quantitative real-time PCR for titration of infectious recombinant AAV-2 particles
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
ایمنی شناسی و میکروب شناسی
ویروس شناسی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
In this report, we present a fast, reliable and easy to perform method to quantify infectious titers of recombinant AAV-2 (rAAV-2) particles using the LightCycler technology, which is independent from the therapeutic transgene and without the presence of a marker gene. The method is based on the life cycle of AAV-2: after infection of the host cell, the single stranded (ss) AAV-2 genome is converted into a double stranded (ds) form. Following infection with rAAV-2, HeLa cells were lysed and ssDNA of transcriptionally inactive particles were efficiently removed by ssDNA-specific S1 nuclease digestion. The remaining viral dsDNA can be quantified by quantitative real-time PCR (qPCR). For validation of the new method, rAAV-2 preparations were analyzed by two other standard methods for titration of infectious particles in parallel, i.e. the infectious center assay (ICA) as well as flow cytometry using GFP as a marker. Comparing the infectious titers of 40 different AAV-2 fractions assessed by qPCR with the titers determined by FACS analysis a significant correlation (r = 0.87, p < 0.001) with a mean ratio of the titers assessed by qPCR and FACS of 1.92 (S.D. ± 1.59) was found. Further, the titers of seven rAAV-2 fractions using qPCR and ICA covering 5 log ranges were compared and a significant correlation was found between the results (r = 0.80, p < 0.001) with a mean ratio of 3.38 (S.D. ± 1.79), respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Virological Methods - Volume 127, Issue 1, July 2005, Pages 40-45
Journal: Journal of Virological Methods - Volume 127, Issue 1, July 2005, Pages 40-45
نویسندگان
Ulrich-Peter Rohr, Florian Heyd, Judith Neukirchen, Marc-Andre Wulf, Iris Queitsch, Gabriele Kroener-Lux, Ulrich Steidl, Roland Fenk, Rainer Haas, Ralf Kronenwett,