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Article

Theophylline and dexamethasone in combination reduce inflammation and prevent the decrease in HDAC2 expression seen in monocytes exposed to cigarette smoke extract

  • Authors:
    • Xue‑Jiao Sun
    • Zhan‑Hua Li
    • Yang Zhang
    • Xiao‑Ning Zhong
    • Zhi‑Yi He
    • Ji‑Hong Zhou
    • Si‑Ning Chen
    • Yuan Feng
  • View Affiliations / Copyright

    Affiliations: Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China, Department of Respiratory Medicine, Ruikang Hospital Affiliated to Guangxi Traditional Chinese Medicine University, Nanning, Guangxi 530021, P.R. China
  • Pages: 3425-3431
    |
    Published online on: March 6, 2020
       https://doi.org/10.3892/etm.2020.8584
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Abstract

Lung and systemic inflammation are associated with impaired lung function and increased mortality in patients with chronic obstructive pulmonary disease (COPD). Theophylline and glucocorticoids have been shown to have an anti‑inflammatory effect in some respiratory diseases. However, corticosteroid insensitivity is a major barrier to the anti‑inflammatory management of COPD. This study aimed to explore whether a combined treatment of theophylline and dexamethasone (Dex) could decrease cigarette smoke extract (CSE)‑induced inflammation via prevention of a reduction in histone deacetylase 2 (HDAC2) expression and through inhibition of the PI3K/Akt pathway, which may be related to corticosteroid sensitivity. The half‑maximal inhibitory concentration (IC50) of Dex (IC50‑Dex) was used to as a marker of corticosteroid sensitivity. IC50‑Dex was determined through observation of Dex inhibition of tumor necrosis factor‑α (TNF‑α)‑induced interleukin (IL)‑8 release. Using reverse transcription quantitative PCR and western blotting, U937 cells treated with CSE were assessed for HDAC2 expression levels and phosphorylation levels of Akt. Theophylline and Dex pre‑treatment was shown to significantly reduce the CSE‑induced release of IL‑8 and TNF‑α. The combination of theophylline and Dex pretreatment also reversed corticosteroid insensitivity in CSE‑induced U937 cells and inhibited the PI3K/AKT pathway to a greater extent than theophylline treatment alone. CSE‑treated U937 cells showed a reduction in HDAC2 mRNA and protein expression compared with the control group. However, this effect was reduced after pre‑incubation with the combined therapy or theophylline alone. In conclusion, pretreatment with theophylline and Dex decreased CSE‑induced inflammation via inhibition of the PI3K/Akt pathway and increase in HDAC2 protein expression.
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Copy and paste a formatted citation
Spandidos Publications style
Sun XJ, Li ZH, Zhang Y, Zhong XN, He ZY, Zhou JH, Chen SN and Feng Y: Theophylline and dexamethasone in combination reduce inflammation and prevent the decrease in HDAC2 expression seen in monocytes exposed to cigarette smoke extract. Exp Ther Med 19: 3425-3431, 2020.
APA
Sun, X., Li, Z., Zhang, Y., Zhong, X., He, Z., Zhou, J. ... Feng, Y. (2020). Theophylline and dexamethasone in combination reduce inflammation and prevent the decrease in HDAC2 expression seen in monocytes exposed to cigarette smoke extract. Experimental and Therapeutic Medicine, 19, 3425-3431. https://doi.org/10.3892/etm.2020.8584
MLA
Sun, X., Li, Z., Zhang, Y., Zhong, X., He, Z., Zhou, J., Chen, S., Feng, Y."Theophylline and dexamethasone in combination reduce inflammation and prevent the decrease in HDAC2 expression seen in monocytes exposed to cigarette smoke extract". Experimental and Therapeutic Medicine 19.5 (2020): 3425-3431.
Chicago
Sun, X., Li, Z., Zhang, Y., Zhong, X., He, Z., Zhou, J., Chen, S., Feng, Y."Theophylline and dexamethasone in combination reduce inflammation and prevent the decrease in HDAC2 expression seen in monocytes exposed to cigarette smoke extract". Experimental and Therapeutic Medicine 19, no. 5 (2020): 3425-3431. https://doi.org/10.3892/etm.2020.8584
Copy and paste a formatted citation
x
Spandidos Publications style
Sun XJ, Li ZH, Zhang Y, Zhong XN, He ZY, Zhou JH, Chen SN and Feng Y: Theophylline and dexamethasone in combination reduce inflammation and prevent the decrease in HDAC2 expression seen in monocytes exposed to cigarette smoke extract. Exp Ther Med 19: 3425-3431, 2020.
APA
Sun, X., Li, Z., Zhang, Y., Zhong, X., He, Z., Zhou, J. ... Feng, Y. (2020). Theophylline and dexamethasone in combination reduce inflammation and prevent the decrease in HDAC2 expression seen in monocytes exposed to cigarette smoke extract. Experimental and Therapeutic Medicine, 19, 3425-3431. https://doi.org/10.3892/etm.2020.8584
MLA
Sun, X., Li, Z., Zhang, Y., Zhong, X., He, Z., Zhou, J., Chen, S., Feng, Y."Theophylline and dexamethasone in combination reduce inflammation and prevent the decrease in HDAC2 expression seen in monocytes exposed to cigarette smoke extract". Experimental and Therapeutic Medicine 19.5 (2020): 3425-3431.
Chicago
Sun, X., Li, Z., Zhang, Y., Zhong, X., He, Z., Zhou, J., Chen, S., Feng, Y."Theophylline and dexamethasone in combination reduce inflammation and prevent the decrease in HDAC2 expression seen in monocytes exposed to cigarette smoke extract". Experimental and Therapeutic Medicine 19, no. 5 (2020): 3425-3431. https://doi.org/10.3892/etm.2020.8584
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