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. 2020 Jun 19;10:9963. doi: 10.1038/s41598-020-66900-2

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© The Author(s) 2020

Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Capsaicin disrupts the integrity of intestines. (a,b) The representative images of “smurf” flies (top) and the percentage of “smurf” in flies (below). “Smurf” flies displayed intestinal barrier dysfunction by blue dye permeation throughout the body. 80 mM capsaicin was used. n = 12. (c) Capsaicin stimulated the proliferation of intestinal stem cells in the midgut. Representative images in which mitosis is indicated by red staining with PH3, and nuclei are stained blue with DAPI. (d) Quantification of PH-3 positive cells in the gut regions of control and capsaicin exposed flies. The anterior gut, midgut, and posterior gut are parts of the gut regions. 80 mM capsaicin was used. n = 8, three replicates. The independent samples t-test was used to assess the mean deviation of each column. Values represent mean ± S.E.M. **P < 0.01; ***P < 0.001.