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Jugular Vein Injection of High-Titer Lentiviral Vectors Does Not Transduce the Aorta-Brief Report. | LitMetric

AI Article Synopsis

Article Abstract

Objective: Efficient gene transfer to the vascular wall via intravenous vector injection would be useful for experimental vascular biology and gene therapy. Initial studies of lentiviral vector tropism suggested that intravenously injected vectors do not transduce murine vascular tissue; however, there are also reports of highly efficient aortic transduction after jugular vein injection of high-titer lentiviral vectors. We sought to reproduce these results. Approach and Results: We injected high-titer preparations of GFP (green fluorescent protein)-expressing lentiviral vector into jugular veins of 8 mice; 6 mice received vehicle only. Four days later, samples of aorta (thoracic and abdominal), liver, spleen, and other tissues were harvested and processed for quantitative polymerase chain reaction detection of vector DNA and immunohistochemical detection of GFP. Our vector DNA assay did not detect transduction of any of the 16 aortic segments. This finding excludes an aortic transduction efficiency of >0.02 vector copies per cell. In contrast, vector DNA was detected in all 8 spleen and liver extracts (median, 0.8 and 0.1 vector copies per cell, respectively; <0.001 versus vehicle controls). Quantitative polymerase chain reaction signals from DNA extracted from heart, lung, kidney, skeletal muscle, and femoral artery did not differ from background polymerase chain reaction signals from DNA extracted from tissues of vehicle-injected mice (≥0.7 for all). Immunohistochemistry revealed GFP in scattered cells in spleen and liver, not in aorta.

Conclusions: Injection of high-titer lentiviral vectors via the jugular vein transduces cells in the spleen and liver but does not efficiently transduce the aorta. Graphic Abstract: A graphic abstract is available for this article.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7901533PMC
http://dx.doi.org/10.1161/ATVBAHA.120.315125DOI Listing

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