title: Nuclear expression of YB-1 in diffuse large B-cell lymphoma: correlation with disease activity and patient outcome.
abstract: The aim of this study is to investigate the correlations among Y-box binding protein-1 (YB-1) and P-glycoprotein(P-gp) and their prognostic significance in diffuse large B-cell lymphoma (DLBCL). The expression of YB-1 and P-gp was examined immunohistochemically on 68 patients with DLBCL who were treated from 2003 to 2005. Samples were paraffin-embedded newly diagnosed DLBCL tissues taken from the surgical specimens before adjuvant chemotherapy. We determined the prognostic significance of YB-1 and its relationship with P-gp in patients with DLBCL. Of the 68 tumors examined, 42 (61.8%) were positive for YB-1 expression in the nucleus. The nuclear expression of YB-1 was significantly associated with clinical stages, bone marrow involvement, extra nodal involvement, and poor response to chemotherapy. No associations were observed between P-gp and clinical features, in context of the poor response to chemotherapy. Nuclear expression of YB-1 was correlated significantly with increased expression of P-gp patients with a nuclear YB-1 tumor had a poorer prognosis than did those with a cytoplasmic YB-1 tumor in all of the DLBCL patients (P = 0.035). Thus, correlation of YB-1 and P-gp emerged as a possible biomarker for unfavorable prognosis in DLBCL. It may provide useful information for clinicians to determine the appropriate therapy for each type of DLBCL.
authors.affiliation: Central Laboratory of Experimental Hematology, The Affiliated People's Hospital, Jiangsu University, 8 Dianli Road, Zhenjiang, China.
authors.forename: WenLing
authors.initials: W
authors.lastname: Xu
authors.forename: LeiLei
authors.initials: L
authors.lastname: Zhou
authors.forename: RuJuan
authors.initials: R
authors.lastname: Qin
authors.forename: HuaRong
authors.initials: H
authors.lastname: Tang
authors.forename: HuiLing
authors.initials: H
authors.lastname: Shen
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000032:analysis; D015415:Biomarkers / Q000032:analysis; D002467:Cell Nucleus / Q000737:chemistry*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D016403:Lymphoma, Large B-Cell, Diffuse / Q000737:chemistry / Q000188:drug therapy / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D016896:Treatment Outcome; D051840:Y-Box-Binding Protein 1 / Q000032:analysis*
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D015415:Biomarkers; D051840:Y-Box-Binding Protein 1