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  • Oncogenomics
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HTPAP gene on chromosome 8p is a candidate metastasis suppressor for human hepatocellular carcinoma

Oncogene volume 25, pages 1832–1840 (2006)Cite this article

Abstract

Our previous studies suggested that chromosome 8p deletion is associated with metastasis of hepatocellular carcinoma (HCC), in which some novel metastasis suppressor genes might be harbored. The present study aimed to identify the metastatic suppressor gene(s). A cDNA chip was constructed with the expressed sequence tags (ESTs) from chromosome 8p and used to compare the difference of expression profiling between the MHCC97-H and MHCC97-L cell lines with different metastatic potentials and similar genetic backgrounds. In all, 10 ESTs were significantly downregulated in MHCC97-H cell line with higher metastatic potential. One full-length gene, HTPAP (phosphatidic acid phosphatase type 2 domain containing 1B), was identified at chromosome 8p12. Sequencing and bioinformatic analyses revealed that HTPAP has 826 bp and encodes a putative protein of 175 amino acids with a transmembrane segment at the NH2 terminus, two protein kinase C phosphorylation site and one tyrosine kinase phosphorylation site. Its expression level in metastatic tumor tissues was much lower than that of primary HCC tissues. Both in vitro and in vivo assays suggested that HTPAP could suppress the invasion and metastasis of HCC. These suggested that HTPAP is a novel metastatic suppressor gene for HCC. The mechanism of the effect of HTPAP on HCC metastasis is not clear yet and deserves further investigation.

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Acknowledgements

This work was supported in part by China National Natural Science Foundation for Distinguished Young Scholars (30325041), the China National ‘863’ R & D High-tech Key Project (2002BA711A02-4), Shanghai Science and Technology Developing Program (Grant No. 03DZ14024), Foundation for Outstanding Scholars in New Era, and the Key Project from the Ministry of Education of China.

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  1. X Wu and H-L Jia: These authors contributed equally to this work.

Authors and Affiliations

  1. Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, China

    X Wu, H-L Jia, Y-F Wang, N Ren, Q-H Ye, H-C Sun, L Wang, Y-K Liu, Z-Y Tang & L-X Qin

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  1. X Wu
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Correspondence to L-X Qin.

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Wu, X., Jia, HL., Wang, YF. et al. HTPAP gene on chromosome 8p is a candidate metastasis suppressor for human hepatocellular carcinoma. Oncogene 25, 1832–1840 (2006). https://doi.org/10.1038/sj.onc.1209191

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