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BioMed Research International
Volume 2017 (2017), Article ID 6894832, 6 pages
https://doi.org/10.1155/2017/6894832
Research Article

Impact of Elevated Circulating Histones on Systemic Inflammation after Radiofrequency Ablation in Lung Cancer Patients

1Department of Radiation Oncology, Tianjin Medical University Cancer Institute and Hospital, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
2Department of Oncology, First Hospital of Qinhuangdao, Qinhuangdao, Hebei 066000, China
3Medical Research Center, Beijing Chao-Yang Hospital, Beijing 100020, China

Correspondence should be addressed to Zhiyong Yuan; nc.anis@6102nauyrd

Received 28 July 2017; Accepted 26 November 2017; Published 31 December 2017

Academic Editor: Xin-yuan Guan

Copyright © 2017 Tao Gu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. This study investigated the changes of circulating histones following radiofrequency ablation (RFA) in lung cancer patients and their impact on systemic inflammation. Methods. Serial blood samples were obtained from a total of 65 primary and metastatic lung cancer patients undergoing RFA at 2 time points: pre-RFA and post-RFA within 48 h. Circulating histones, myeloperoxidase (MPO), and multiple inflammatory cytokines were measured. Moreover, the patient’s sera were incubated overnight with human monocytic U937 cells in the presence or absence of anti-histone antibody, and cytokine production was evaluated. Results. Compared to pre-RFA, there was a significant increase in circulating histones within 48 h after RFA, along with an elevation of MPO and several canonical inflammatory cytokines. Circulating histones were correlated with these inflammatory markers. Notably, compared to the sera obtained before RFA, the patients’ post-RFA sera significantly stimulated cytokine production in the supernatant of U937 cells, which could be prevented by anti-histone antibody, thereby confirming a cause-effect relationship between circulating histones and systemic inflammation. Conclusions. This study showed that circulating histones may serve as a marker indicating RFA-related systemic inflammation as well as represent a therapeutic target for resolution of inflammation.