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The prognostic significance of the expression of monocarboxylate transporter 4 in patients with right- or left-sided colorectal cancer.
Asia-Pacific Journal of Clinical Oncology 2018 September 31
AIM: Monocarboxylate transporter 4 (MCT4) is a proton pump that exchanges lactate through the plasma membrane. The present study investigated the clinical significance of the expression of MCT4 in patients with right- or left-sided colorectal cancer (CRC).
METHODS: Surgical specimens from 237 CRC patients were immunohistochemically stained with polyclonal anti-MCT4 antibodies. The relationships among the MCT4 expression, the clinicopathological factors, and the prognosis were evaluated.
RESULTS: Thirty-six (62.1%) of 58 patients with right-sided CRC and 95 (53.1%) of 179 patients with left-sided CRC showed the high expression of MCT4. The MCT4 expression was significantly correlated with gender and lymph node metastasis in patients with right-sided CRC, and size, depth of invasion, distant metastasis, and tumor-node-metastasis stage in patients with left-sided CRC. A univariate analysis demonstrated that the expression of MCT4 was a significant prognostic factor in both right- and left-sided CRC patients. A multivariate analysis demonstrated the expression of MCT4 was a significantly independent prognostic factor in patients with left-sided CRC, but not in those with right-sided CRC.
CONCLUSIONS: Our results suggest that the high expression of MCT4 is a useful marker for tumor progression and a poor prognosis in CRC patients, especially those with left-sided CRC.
METHODS: Surgical specimens from 237 CRC patients were immunohistochemically stained with polyclonal anti-MCT4 antibodies. The relationships among the MCT4 expression, the clinicopathological factors, and the prognosis were evaluated.
RESULTS: Thirty-six (62.1%) of 58 patients with right-sided CRC and 95 (53.1%) of 179 patients with left-sided CRC showed the high expression of MCT4. The MCT4 expression was significantly correlated with gender and lymph node metastasis in patients with right-sided CRC, and size, depth of invasion, distant metastasis, and tumor-node-metastasis stage in patients with left-sided CRC. A univariate analysis demonstrated that the expression of MCT4 was a significant prognostic factor in both right- and left-sided CRC patients. A multivariate analysis demonstrated the expression of MCT4 was a significantly independent prognostic factor in patients with left-sided CRC, but not in those with right-sided CRC.
CONCLUSIONS: Our results suggest that the high expression of MCT4 is a useful marker for tumor progression and a poor prognosis in CRC patients, especially those with left-sided CRC.
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