title: [Expression of topoisomerase II alpha in human colorectal carcinoma and its significance].
abstract: OBJECTIVE
  To detect the correlation between the expression of topoisomerase 2 alpha (TOP2A) and the biological behaviors of human colorectal carcinoma.
  
  
  METHODS
  Immunohistochemistry and real-time RT-PCR were used to detect the expression of TOP2A in colorectal carcinomas and normal mucosa.
  
  
  RESULTS
  The protein and mRNA expressions of TOP2A in the metastatic lymph nodes were significantly higher than those in matched primary lesions and normal tissues (P<0.05). No significant difference was found in TOP2A expressions between normal mucosa and colorectal carcinomas. The protein and mRNA expressions of TOP2A were significantly correlated to the lymph node metastasis and invasion depth (P<0.05), but not to the differentiation of the tumor (P>0.05).
  
  
  CONCLUSIONS
  TOP2A plays an important role in the invasion and metastasis of the colorectal carcinomas, and may serve as a valuable indicator for the diagnosis, treatment and the prognostic evaluation of the malignancy.
authors.affiliation: Clinical Laboratory, Nanhai Maternal and Children's Hospital Affiliated to Guangzhou University of Traditional Chinese Medicine, Guangzhou 528200, China. yfd438318@163.com
authors.forename: Fa-da
authors.initials: FD
authors.lastname: Yang
authors.forename: Zhang-lin
authors.initials: ZL
authors.lastname: Jia
mesh_terms: D000951:Antigens, Neoplasm / Q000378:metabolism*; D015179:Colorectal Neoplasms / Q000378:metabolism* / Q000473:pathology*; D004250:DNA Topoisomerases, Type II / Q000378:metabolism*; D004268:DNA-Binding Proteins / Q000378:metabolism*; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D000075223:Poly-ADP-Ribose Binding Proteins
chemical_list: D000951:Antigens, Neoplasm; D004268:DNA-Binding Proteins; D000075223:Poly-ADP-Ribose Binding Proteins; D004250:DNA Topoisomerases, Type II; C000618811:TOP2A protein, human