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. 2019 Jun 13;19:53. doi: 10.1186/s12894-019-0485-1

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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. 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.

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Fig. 2 — (a) The levels of let-7i expression in cell lines T24 transfected with let-7i mimic and negative control was detected by RT-PCR after transfection for 24 h. (b) The levels of let-7i expression in cell lines 5637 transfected with let-7i mimic and negative control was detected by RT-PCR after transfection for 24 h. (c) CCK-8 assay was used to determine the proliferation of cell lines T24 transfected with let-7i mimic and negative control. (d) CCK-8 assay was used to determine the proliferation of cell lines 5637 transfected with let-7i mimic and negative control. (**P < 0.01, ***P < 0.001)