Clinical and Prognostic Significance of RhoA and RhoC Gene Expression in Esophageal Squamous Cell Carcinoma (original) (raw)

Abstract

Background

Rho GTPases are involved in the organization of a microfilament network, cell-to-cell interaction, and malignant transformation. To elucidate the role of Rho GTPases in esophageal squamous cell carcinoma (ESCC), we compared the levels of RhoA and RhoC mRNA from ESCC with the corresponding normal tissue originating from the same patients.

Methods

Real-time reverse transcriptase–polymerase chain reaction was performed to observe rhoA and rhoC in esophageal cell lines. Next, the mRNA levels of rhoA and rhoC were evaluated from 50 patients.

Results

The rhoA and rhoC were higher in ESCC cell lines than in noncancerous esophageal cell. rhoC was overexpressed in TTn, which was obtained directly from a surgical specimen of a metastatic lesion of ESCC in the mandible. rhoA and rhoC were significantly higher in ESCC patient than in the normal counterparts (P = .0022 and P < .0001, respectively). rhoA correlated with tumor differentiation and rhoC correlated with an advanced tumor, node, metastasis system classifications. rhoA and rhoC in ESCC showed a positive correlation (P = .008). Patients with rhoA overexpression showed a significantly poorer prognosis than those with rhoA underexpression (P = .044).

Conclusions

To our knowledge, this study is the first in which the expression of RhoA and RhoC at the mRNA level in ESCC was examined and compared with its normal counterpart. Our results suggest that rhoA and rhoC are involved in ESCC progression and useful as prognostic markers. Further study will be needed to examine the therapeutic potential of the Rho GTPase inhibitor as a promising anticancer therapy, especially in ESCC.

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ACKNOWLEDGMENTS

We thank R. O. Hynes (MIT, USA) for Rho plasmids; T. Nishihira (Tohoku University, Japan) for TE-2 cells; K. Takahashi (Chiba University, Japan) for TT and TTn cells; H. Matsubara (Chiba University, Japan) for CHEK-1 cells; and M. Nakazawa (Gunma University, Japan) for suggestions on statistical analysis. This work was supported by the 21st Century COE, Japan and the Japan Society for the Promotion of Science (JSPS) for A. Faried.

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Authors and Affiliations

  1. Department of General Surgical Science (Surgery I), Gunma University, 3-39-22, Showa-machi, Maebashi, Gunma, 371-8511, Japan
    Ahmad Faried MD, PhD, Hiroyuki Kato MD, PhD & Hiroyuki Kuwano MD, PhD
  2. Department of Surgery, Padjadjaran University Faculty of Medicine, 38 Pasteur Street, Bandung, West Java, 40161, Indonesia
    Ahmad Faried MD, PhD & Nurhayat Usman MD
  3. Department of Gynecology and Reproductive Medicine, Gunma University, 3-39-22, Showa-machi, Maebashi, Gunma, 371-8511, Japan
    Leri S. Faried MD

Authors

  1. Ahmad Faried MD, PhD
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  2. Leri S. Faried MD
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  3. Nurhayat Usman MD
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  4. Hiroyuki Kato MD, PhD
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  5. Hiroyuki Kuwano MD, PhD
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Correspondence toAhmad Faried MD, PhD.

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Faried, A., Faried, L.S., Usman, N. et al. Clinical and Prognostic Significance of RhoA and RhoC Gene Expression in Esophageal Squamous Cell Carcinoma.Ann Surg Oncol 14, 3593–3601 (2007). https://doi.org/10.1245/s10434-007-9562-x

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