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BMC Cancer
Published in: BMC Cancer 1/2014

Open Access 01-12-2014 | Research article

A novel oxygen carrier “YQ23” suppresses the liver tumor metastasis by decreasing circulating endothelial progenitor cells and regulatory T cells

Authors: Chang Xian Li, Bing L Wong, Chang Chun Ling, Yuen Yuen Ma, Yan Shao, Wei Geng, Xiang Qi, Sze Hang Lau, Sui Yi Kwok, Na Wei, Fei Chuen Tzang, Kevin TP Ng, Xiao Bing Liu, Chung Mau Lo, Kwan Man

Published in: BMC Cancer | Issue 1/2014

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Abstract

Background

Surgical therapies are the first-line treatments for hepatocellular carcinoma (HCC) patients. However, the high incidence of tumor metastasis after liver surgery remains a severe problem. We aim to investigate the roles and the underlying mechanism of YQ23, stabilized non-polymeric diaspirin cross-linked tetrameric hemoglobin, in liver tumor metastasis after major hepatectomy and partial hepatic ischemia reperfusion (I/R) injury.

Methods

An orthotopic liver tumor model in Buffalo rat was established using the hepatocellular carcinoma cell line McA-RH7777. Major hepatectomy for tumor-bearing lobe and partial hepatic I/R injury were performed at two weeks after orthotopic liver tumor implantation. YQ23 (0.2 g/kg) was administered at 1 hour before ischemia and immediately after reperfusion. Blood samples were collected at day 0, 1, 7, 14, 21 and 28 for detection of circulating endothelial progenitor cells (EPCs) and regulatory T cells (Tregs).

Results

Our results showed that YQ23 treatment effectively inhibited intrahepatic and lung metastases together with less tumor angiogenesis at 4 weeks after major hepatectomy and partial hepatic I/R injury. The levels of circulating EPCs and Tregs were significantly decreased in YQ23 treatment group. Furthermore, YQ23 treatment also increased liver tissue oxygenation during hepatic I/R injury. Up-regulation of HO1 and down-regulation of CXCR3, TNF-α and IL6 were detected after YQ23 treatment.

Conclusions

YQ23 treatment suppressed liver tumor metastasis after major hepatectomy and partial hepatic I/R injury in a rat liver tumor model through increasing liver oxygen and reducing the populations of circulating EPCs and Tregs.
Appendix
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Metadata
Title
A novel oxygen carrier “YQ23” suppresses the liver tumor metastasis by decreasing circulating endothelial progenitor cells and regulatory T cells
Authors
Chang Xian Li
Bing L Wong
Chang Chun Ling
Yuen Yuen Ma
Yan Shao
Wei Geng
Xiang Qi
Sze Hang Lau
Sui Yi Kwok
Na Wei
Fei Chuen Tzang
Kevin TP Ng
Xiao Bing Liu
Chung Mau Lo
Kwan Man
Publication date
01-12-2014
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2014
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/1471-2407-14-293

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