Targeting CCL2/CCR2 in tumor-infiltrating macrophages: a tool emerging out of the box against hepatocellular carcinoma
Keywords: 
Hepatocellular carcinoma (HCC)
Liver tumor
Cancer-related mortality
Issue Date: 
2019
Publisher: 
Elsevier BV
ISSN: 
2352-345X
Note: 
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Citation: 
Avila, M.A. (Matías Antonio); Berasain, C. (Carmen). "Targeting CCL2/CCR2 in tumor-infiltrating macrophages: a tool emerging out of the box against hepatocellular carcinoma". Cellular and Molecular Gastroenterology and Hepatology. 7 (2), 2019, 293 - 294
Abstract
Hepatocellular carcinoma (HCC) is the most frequent primary liver tumor and a leading cause of cancer-related mortality. Unfortunately, the majority of HCC patients present with advanced disease, when locoregional curative strategies are no longer applicable. On the other hand, early, HCCs proved to be resistant to conventional chemotherapies, and drugs targeting specific growth factor signaling pathways tested over the past decade have not succeeded in clinical trials. The molecular heterogeneity of HCCs and the lack of biomarker-based patient stratification strategies may underlie the failure of most of these trials. HCCs usually develop on a background of chronic liver injury and regeneration, inflammation, and fibrosis, features that promote tumor hypervascularity, the other histologic hallmark of this neoplasia. Indeed, the fibrotic and immune microenvironment plays a key role in pathogenic angiogenesis and HCC development and progression. This tenet is supported not only by experimental evidence, but also by the fact that the only therapeutic agents showing clinical efficacy in advanced HCC are those directed toward the interaction of HCC with its microenvironment (ie, anti-angiogenic multikinase inhibitors such as sorafenib, and immune checkpoint inhibitors such as antibodies targeting programmed cell death receptor 1 and its ligand).

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