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. 2019 Jun 26;14:217. doi: 10.1186/s11671-019-3032-9

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 3 — Detection of cytokines released from RAW264.7 cells stimulated with CpG-ODN, CpG-RCA gel, and CpG-MCA gels using ELISA-kit. a The secretion of TNF-α from RAW264.7 cells. b The secretion of TNF-α from RAW264.7 cells after treated with different concentrations of CpG-MCA gels. c Detection of the immuno-stimulating ability of CpG gels and non-CpG gels (R12-C, R4M4-C, and R4M8-C). d The secretion of IL-6 from RAW264.7 cells. e The secretion of IL-6 from RAW264.7 cells after treated with different concentrations of MCA gels. Results are expressed as the mean ± SD of two independent experiments. **P < 0.01, ***P < 0.001, ****P < 0.0001