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. 2021 Nov 16;21:281. doi: 10.1186/s12906-021-03453-5

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© The Author(s) 2021

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. 4 — Effects of PJH on CS/LPS-induced changes in pro-inflammatory cytokines in BALF. Concentration of TNF-α (A) and IL-6 (B) in BALF. CON: control group; CS + LPS group: CS/LPS-exposed; RO group: administration of roflumilast 10 mg/kg prior to CS/LPS exposure; PJH100 group: administration of PJH 100 mg/kg prior to CS/LPS exposure; PJH200 group: administration of PJH 200 mg/kg prior to CS/LPS exposure. Results are presented as means ± SD (^#P < 0.05, ^##P < 0.01 compared with the CON group; *P < 0.05, **P < 0.01 compared with the CS + LPS group)