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. 2020 Apr 9;18:58. doi: 10.1186/s12951-020-00610-9

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© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 3 — In vitro transfection efficiency of the LPPC/DNA/RBDV complexes. Different concentrations of a RBDV complexes or b IgG1 Fc with 5 μg of DNA and 50 μg of LPPC were transfected into B16-F10 cells, and the cells were observed under a microscope 48 h after transfection. LPPC, which encapsulated with RBDV or IgG1 Fc, were all complexed by PEG