Colorectal Cancer Cell-derived Microvesicles Are Enriched in Cell Cycle-related MRNAs That Promote Proliferation of Endothelial Cells

Overview

Journal BMC Genomics

Publisher Biomed Central

Specialty Genetics

Date 2009 Nov 26

PMID 19930720

Citations 209

Authors

Bok Sil Hong

Ji-Hoon Cho

Hyunjung Kim

Eun-Jeong Choi

Sangchul Rho

Jongmin Kim

Ji Hyun Kim

Dong-Sic Choi

Yoon-Keun Kim

Daehee Hwang

Yong Song Gho

Affiliations

Soon will be listed here.

Abstract

Background: Various cancer cells, including those of colorectal cancer (CRC), release microvesicles (exosomes) into surrounding tissues and peripheral circulation. These microvesicles can mediate communication between cells and affect various tumor-related processes in their target cells.

Results: We present potential roles of CRC cell-derived microvesicles in tumor progression via a global comparative microvesicular and cellular transcriptomic analysis of human SW480 CRC cells. We first identified 11,327 microvesicular mRNAs involved in tumorigenesis-related processes that reflect the physiology of donor CRC cells. We then found 241 mRNAs enriched in the microvesicles above donor cell levels, of which 27 were involved in cell cycle-related processes. Network analysis revealed that most of the cell cycle-related microvesicle-enriched mRNAs were associated with M-phase activities. The integration of two mRNA datasets showed that these M-phase-related mRNAs were differentially regulated across CRC patients, suggesting their potential roles in tumor progression. Finally, we experimentally verified the network-driven hypothesis by showing a significant increase in proliferation of endothelial cells treated with the microvesicles.

Conclusion: Our study demonstrates that CRC cell-derived microvesicles are enriched in cell cycle-related mRNAs that promote proliferation of endothelial cells, suggesting that microvesicles of cancer cells can be involved in tumor growth and metastasis by facilitating angiogenesis-related processes. This information will help elucidate the pathophysiological functions of tumor-derived microvesicles, and aid in the development of cancer diagnostics, including colorectal cancer.

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