Abstract
To examine the relationship between the expression levels of miR-1 and PIK3CA in resected non-small-cell lung cancer (NSCLC) tissues and clinical characteristics and prognosis. Levels of miR-1 and PIK3CA in cancerous and normal tissues obtained from 55 patients with NSCLC were measured by real-time PCR and western blot assays, and their associations with clinicopathological features were evaluated. A total of 69.1% of the NSCLC tissue samples showed low miR-1 expression (p < 0.05) and 70.9% showed high PIK3CA expression (p < 0.05). Patients with low miR-1 expression and those with high PIK3CA expression had significantly higher incidences of lymph node metastases and postoperative recurrences within 1 year after surgery than those with moderate miR-1 expression and moderate PIK3CA expression (p < 0.05 for both). Low expression of miR-1 and overexpression of PIK3CA in NSCLC tissues may be useful predictors of lymph node metastasis and postoperative recurrence in patients with NSCLC.
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