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. 2018 Jun 25;19:126. doi: 10.1186/s12931-018-0825-9

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© The Author(s). 2018

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. 5 — PAMP stimulation induces expression of negative regulators of TLR signaling in human tracheobronchial epithelial cells (TBEC). mRNA expression of negative regulators Tollip (a), A20 (b) and IRAK-M (c) in TBEC in the absence (−) and presence of LPS or Poly(I:C) (PIC) at 4, 24 and 48 h. N = 8 donor subjects. Median values are shown as horizontal lines. Densitometric analysis of Tollip (d) and A20 (e) western blots on lysates of TBEC in the absence (−) or presence of treatments with LPS, PIC at 4, 24 and 48 h. β-actin was included as a protein loading control to normalize Tollip or A20 expression. N = 3 donor subjects (additional blots in Additional file 1: Figure S2)