title: Blimp-1 protein and Hans classification on prognosis of diffuse large B-cell lymphoma and their interrelation.
abstract: OBJECTIVE
  Diffuse large B-cell lymphoma (DLBCL), the most common type of non-Hodgkin's lymphoma (NHL), is heterogeneous on molecular and clinical levels, therefore, its prognosis is difficult to predict. This study aimed to evaluate the value of Blimp-1 protein and Hans classification in predicting the prognosis of DLBCL and their interrelation.
  
  
  METHODS
  The clinical records of 136 patients with DLBCL were reviewed. The patients were followed up for 5-80 months (median, 39 months). Immunohistochemical staining for CD10, MUM1, Bcl-6, and Blimp-1 were performed on paraffin-embedded tumor tissues from the 136 patients. The correlations of Blimp-1 protein and Hans classification in prognosis of DLBCL and their interrelation were analyzed.
  
  
  RESULTS
  Blimp-1 was detected in 38 (30.0%) patients, and was associated with a significantly shorter overall survival (OS) (P = 0.030). Using the Hans classification based upon the expression of CD10, Bcl-6, and MUM1, 54 patients had germinal center B-cell (GCB) phenotype and 82 had non-GCB phenotype. The 5-year OS rate was 75% in the GCB group and 52% in the non-GCB group (P = 0.020). The positive rate of Blimp-1 was 22.2% in the GCB group and 31.7% in the non-GCB group (P = 0.329). The Cox regression multivariate analysis showed that international prognosis index (IPI) and Hans classification had independent prognostic significance, whereas Blimp-1 was not an independent prognostic factor.
  
  
  CONCLUSIONS
  The patients with GCB subtype of DLBCL had better prognosis than the non-GCB subtype. High level of Blimp-1 expression in the patients with DLBCL implies a shorter survival, but it is not associated with Hans classification.
authors.affiliation: Department of Pathology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Song
authors.forename: Zhi
authors.initials: Z
authors.lastname: Cao
authors.forename: Ling
authors.initials: L
authors.lastname: Li
authors.forename: Hong-Tu
authors.initials: HT
authors.lastname: Zhang
authors.forename: Xun
authors.initials: X
authors.lastname: Zhang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D004268:DNA-Binding Proteins / Q000378:metabolism; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D016130:Immunophenotyping; D050835:Interferon Regulatory Factors / Q000378:metabolism; D016403:Lymphoma, Large B-Cell, Diffuse / Q000145:classification* / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D015260:Neprilysin / Q000378:metabolism; D000074462:Positive Regulatory Domain I-Binding Factor 1; D011379:Prognosis; D016016:Proportional Hazards Models; D051560:Proto-Oncogene Proteins c-bcl-6; D012097:Repressor Proteins / Q000378:metabolism*; D015996:Survival Rate; D055815:Young Adult; D000099218:Interferon Regulatory Factor-4
chemical_list: D004268:DNA-Binding Proteins; D050835:Interferon Regulatory Factors; D015260:Neprilysin; D000074462:Positive Regulatory Domain I-Binding Factor 1; D051560:Proto-Oncogene Proteins c-bcl-6; D012097:Repressor Proteins; D000099218:Interferon Regulatory Factor-4; C084103:BCL6 protein, human; C087042:PRDM1 protein, human