Carcinogenesis, Teratogenesis & Mutagenesis ›› 2022, Vol. 34 ›› Issue (3): 184-191.doi: 10.3969/j.issn.1004-616x.2022.03.004

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Expression of melanoma-associated antigen A gene family in breast cancer and its clinical significance

FAN Xiaojie1, LI Qingjing2, GU Lina3, SANG Meixiang3, SHAN Baoen3   

  1. 1. Department of Pathology, the Fourth Hospital of Hebei Medical University, Shijiazhuang 050011;
    2. Department of Clinical Laboratory, the Fourth Hospital of Hebei Medical University, Shijiazhuang 050011;
    3. Scientific Research Center, the Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, Hebei, China
  • Received:2022-01-10 Revised:2022-05-06 Published:2022-06-10

Abstract: OBJECTIVE: To investigate expressions of melanoma-associated antigen A family (MAGE-As)in peripheral blood and cancer tissues from breast cancer patients,and to analyze their relationships with clinical parameters. METHODS: Expression levels of MAGE-As mRNA in peripheral blood of 106 breast cancer patients and 30 healthy controls were detected by multi-nested PCR,and expression levels of MAGE-A1,A2,A3,A4 and A6 were identified by restriction endonuclease digestion method.Expressions of MAGE-As protein in paraffin-embedded tissues of cancer tissues were detected by immunohistochemistry.Correlations between expressions of MAGE-As mRNA in peripheral blood and of MAGE-As protein in corresponding tumor tissues were analyzed. RESULTS: Positive expression rate of MAGE-As mRNA in the blood samples from patients was 40.5%(43/106).Expression rates of MAGE-A1,A2,A3,A4 and A6 were 10.3%(11/106),19.8%(21/106),15.1%(16/106),13.2%(14/106) and 5.7%(6/106),respectively.The sequence of MAGE-As gene expressions was A2>A3>A4>A1>A6.The MAGE-As mRNA expression was positively correlated with age,tumor size,clinical stage and lymph node metastasis (P<0.05).Expressions of MAGE-As mRNA in blood samples of patients were positively correlated with expression of MAGE-As protein in corresponding tumor tissues (r=0.368,P<0.01).Positive expressions of MAGE-As subtypes (MAGE-A1,A2,A3,A4 and A6)were correlated with 5-year survival rates of breast cancer patients (P<0.01).MAGE-As expression and lymph node metastasis were independent prognostic factors for 5-year survival of these patients (all P<0.01). CONCLUSION: MAGE-As may be a specific biomarker for detection of circulating tumor cells in peripheral blood of breast cancer patients,and its expression was correlated with the prognosis of these patients.MAGE-As in peripheral blood of breast cancer patients may be useful as an important biomarker to monitor prognosis of breast cancer.

Key words: breast cancer, MAGE-As, peripheral blood, multiplex semi-nested PCR

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