title: [Expression of multidrug resistance-associated protein (MRP) and lung resistance protein (LRP) in human rectal carcinomas and its clinical significance].
abstract: OBJECTIVE
  To investigate the expression and clinical significance of multidrug resistance-associated protein(MRP) and lung resistance protein(LRP) in rectal carcinoma.
  
  
  METHODS
  Fiftyseven paraffin embeded primary rectal carcinoma specimens were examined by immunohistochemical staining.
  
  
  RESULTS
  Of the 57 tumour specimens examined, 28(49.1%) and 24(42.1%) were positively immunostaned for MRP and LRP, respectively. Co-expression of the two proteins was observed in 10(17.5%) specimens. Positive immunostaning of either of the two proteins was not correlated with cell differentiation and Dukes stage (P > 0.05). Patients with MRP-positive tumours had shorter survival than MRP-negative patients (P < 0.05). No such correlation was found for LRP expression, nor was found between MRP and LRP expression.
  
  
  CONCLUSIONS
  Positive MRP expression in rectal carcinoma appears to be an independant factor of prognostic significance. To examine its expression may help guide rational comprehensive therapy of rectal carcinoma.
authors.affiliation: Department of Medical Oncology, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021.
authors.forename: X
authors.initials: X
authors.lastname: Peng
authors.forename: F
authors.initials: F
authors.lastname: Feng
authors.forename: W
authors.initials: W
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000032:analysis* / Q000235:genetics; D009363:Neoplasm Proteins / Q000032:analysis* / Q000235:genetics; D012004:Rectal Neoplasms / Q000188:drug therapy / Q000378:metabolism* / Q000401:mortality; D015996:Survival Rate; D020394:Vault Ribonucleoprotein Particles / Q000235:genetics; D000099187:Major Vault Protein
chemical_list: D027425:ATP-Binding Cassette, Sub-Family C Proteins; D009363:Neoplasm Proteins; D020394:Vault Ribonucleoprotein Particles; D000099187:Major Vault Protein