[Frontiers in Bioscience S4, 269-276, January 1, 2012]

Therapeutics target of CXCR4 and its downstream in peritoneal carcinomatosis of gastric cancer

Keiichi Koizumi1,2, Shinichiro Kato2, Hiroaki Sakurai2, Isaya Hashimoto3, Kazuo Yasumoto4, Ikuo Saiki 2

1Division of Kampo Diagnostics, University of Toyama, Toyama, Japan, 2Division of Pathogenic Biochemistry, Institute of Natural Medicine; University of Toyama, Toyama, Japan, 3Department of Surgery (II), University of Toyama, Toyama, Japan, 4Division of Surgical Oncology, Cancer Research Institute, Kanazawa University, Kanazawa, Japan

TABLE OF CONTENTS

1. Abstract
2. Introduction
3. CXCR4 is a new player in cancer metastasis
4. Targeting CXCR4 in peritoneal carcinomatosis of gastric cancer
5. Going downstream of CXCR4 in peritoneal carcinomatosis of gastric cancer
6. Conclusion - Around CXCR4 in cancer cells
7. Acknowledgments
8. References

1. ABSTRACT

Patients with advanced gastric carcinoma, especially peritoneal dissemination, have a poor prognosis. Various treatments have been used for peritoneal dissemination of gastric cancer, but there is no effective therapy for this condition. At present, similar proprieties of chemokines between trafficking of leukocytes during immune and inflammatory reactions and organ selective migration of cancer cells during metastasis are widely recognized. In particular, chemokine CXCL12 and its receptors CXCR4 are now known to play an important role in cancer progression. Recently, we reported for the first time that CXCR4 and its ligand, CXCL12, were involved in the development of peritoneal carcinomatosis of gastric cancer, and additionally, clarified the molecular mechanisms of the cell signaling pathways by which gastric cancer develops metastatic ability via CXCR4 and mTOR. In this review, we focus on the biological functions of chemokine receptors, particularly CXCR4 expressed on gastric cancer cells, and the therapeutic strategies targeting CXCR4-mediating signaling pathways in peritoneal carcinomatosis.