title: [Expressions of p-MAPK, cyclin D1, p53 protein and their relationship in osteosarcoma].
abstract: OBJECTIVE
  To detect the expressions of p-MAPK, cyclin D1 and p53 protein, and investigate their relationship in osteosarcomas.
  
  
  METHODS
  SP immunohistochemical technique was used to detect the expressions of of p-MAPK, cyclin D1 and p53 protein among the 58 osteosarcomas and 14 osteoid osteomas samples.
  
  
  RESULTS
  The positive rates of p-MAPK, cyclin D1 and p53 protein were 77.6% (45/58), 60.3% (35/58) and 44.8% (26/58) respectively in 58 osteosarcomas, and 21.4% (3/14), 21.4% (3/14) and 7.1% (1/14) in 14 osteoid osteomas. Their positive rates and expressive intensities in osteosarcomas were higher than those in osteiod osteomas. Their positive correlation was significantly observed between p-MAPK and cyclin D1 proteins (P < 0.01), and wasn't observed between p-MAPK and p53 proteins (P < 0.05) in osteosarcomas.
  
  
  CONCLUSIONS
  MAPK phosporylation may be one of causes for activation of cyclin D1, which play an important role in osteosarcogenesis. The mutation of p53 oncogene may not result in osteosarcogenesis by MAPK signaling pathway. Detecting p-MAPK by immunohistochemistry may be one of diagnostic indexes for osteosarcoma and benign osteoma.
authors.affiliation: Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha 410008, China.
authors.forename: J Z
authors.initials: JZ
authors.lastname: Hu
authors.forename: D Y
authors.initials: DY
authors.lastname: Feng
authors.forename: R X
authors.initials: RX
authors.lastname: Cheng
mesh_terms: D000293:Adolescent; D000328:Adult; D001859:Bone Neoplasms / Q000378:metabolism*; D002648:Child; D019938:Cyclin D1 / Q000096:biosynthesis* / Q000235:genetics; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D020928:Mitogen-Activated Protein Kinases / Q000096:biosynthesis* / Q000235:genetics; D012516:Osteosarcoma / Q000378:metabolism*; D015398:Signal Transduction; D016159:Tumor Suppressor Protein p53 / Q000096:biosynthesis* / Q000235:genetics
chemical_list: D016159:Tumor Suppressor Protein p53; D019938:Cyclin D1; D020928:Mitogen-Activated Protein Kinases