期刊
CANCER CELL
卷 23, 期 4, 页码 541-556出版社
CELL PRESS
DOI: 10.1016/j.ccr.2013.02.025
关键词
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资金
- National Basic Research Program of China (the 973 Program) [2010CB529402]
- National Natural Science Foundation of China [81071733, 31221002]
- 863 Project [2007AA02Z133]
- Beijing NSF [5122012]
- Beijing Outstanding Talents Training Funds in Health Sciences [2011-2-24]
The identification and targeted therapy of cells involved in hepatocellular carcinoma (HCC) recurrence remain challenging. Here, we generated a monoclonal antibody against recurrent HCC, 1B50-1, that bound the isoform 5 of the alpha 2 delta 1 subunit of voltage-gated calcium channels and identified a subset of tumor-initiating cells (TICs) with stem cell-like properties. A surgical margin with cells detected by 1B50-1 predicted rapid recurrence. Furthermore, 1B50-1 had a therapeutic effect on HCC engraftments by eliminating TICs. Finally, alpha 2 delta 1 knockdown reduced self-renewal and tumor formation capacities and induced apoptosis of TICs, whereas its overexpression led to enhanced sphere formation, which is regulated by calcium influx. Thus, alpha 2 delta 1 is a functional liver TIC marker, and its inhibitors may serve as potential anti-HCC drugs.
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