Abstract
The purpose of this study was to analyze the relationship between signal transducer and activator of transcription 3 (STAT3) and carcinoembryonic antigen (CEA) in lung adenocarcinoma cell A549, and to explore the value of STAT3 on early diagnosis of lung adenocarcinoma. The expression of CEA, STAT3 mRNA and it’s protein in human lung adenocarcinoma cell A549 and normal human lung cells MRC-5 were tested by immunohistochemistry staining (PV) and quantitative real time fluorescent PCR. The correlation between STAT3 and CEA in human lung adenocarcinoma cell A549 was analyzed. The protein and mRNA levels of STAT3, CEA in lung adenocarcinoma cell A549 were apparently higher than those in normal human lung cells MRC-5. The levels of STAT3 mRNA and it’s protein were positively correlated with CEA in lung adenocarcinoma cell A549. STAT3 have the same value in diagnosis of lung adenocarcinoma.
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