Laboratory Medicine ›› 2019, Vol. 34 ›› Issue (7): 595-599.DOI: 10.3969/j.issn.1673-8640.2019.07.005

• 临床应用研究·论著 • Previous Articles     Next Articles

Expression of Beclin 1 in breast invasive ductal carcinoma and its relationship with Ki67

HUAN Yu1, CAI Xushan1, JIAO Jiajun2, WU Junlu3, QUAN Wenqiang3, ZHANG Chunli1, XI Fang4   

  1. 1. Department of Clinical Laboratory,Maternal and Child Health Hospital of Jiading District,Shanghai 201821,China
    2. Galactophore Department,Maternal and Child Health Hospital of Jiading District,Shanghai 201821,China
    3. Department of Clinical Laboratory,Tongji Hospital,Tongji University,Shanghai 200065,China
    4. Pathology Department,Maternal and Child Health Hospital of Jiading District,Shanghai 201821,China
  • Received:2018-05-12 Online:2019-07-30 Published:2019-07-25

Abstract:

Objective To investigate the expression of autophagy-associated gene Beclin 1 and proliferation-related gene Ki67 in breast invasive ductal carcinoma. Methods The expressions of Beclin 1 and Ki67 were determined by immunohistochemistry in 64 patients with breast invasive ductal carcinoma and corresponding adjacent tissues. Immunofluorescence and western blotting were used to determine the expressions of Beclin 1 in breast invasive ductal carcinoma and corresponding adjacent tissues. Results The positive expression rate of Beclin 1 in carcinoma tissues(43.8%) was lower than that in adjacent tissues(98.5%)(P<0.05). The positive expression rate of Ki67(76.6%) was higher than that in adjacent tissues(0.00%)(P<0.05). The positive rates of Beclin 1 and Ki67 in carcinoma tissues were negatively correlated(r=-0.256,P<0.05). The expression of Beclin 1 was associated with pathological grade and lymph node metastasis(P<0.05),but it was not associated with tumor diameter,age,estrogen receptor(ER),progesterone receptor(PR) and human epidermal growth factor receptor 2(HER-2)(P>0.05). The expression of Ki67 was associated with pathological grade and tumor diameter(P<0.05),but it was not associated with lymph node metastasis,age,ER,PR and HER-2(P>0.05). The results of immunofluorescence showed that the positive expression rate of Beclin 1 in carcinoma tissues(30.0%) was lower than that in adjacent tissues(100.0%)(P<0.05). The results of western blotting showed that the relative expression of Beclin 1 in adjacent tissues was 0.43±0.12,which was higher than that in carcinoma tissues(0.20±0.18)(P<0.05). Conclusions The expression of Beclin 1 is down-regulated in breast invasive ductal carcinoma,while the expression of Ki67 is up-regulated .

Key words: Beclin 1, Ki67, Cell autophagy, Cell proliferation, Breast invasive ductal carcinoma

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