Expression and significance of Ku80 and PDGFR-α in nasal NK/T-cell lymphoma

Pathology, Research and Practice
Jun LiMeizuo Zhong

Abstract

To investigate the clinical and prognostic significance of Ku80 and PDGFR-α in nasal type NK/T cell lymphoma (NKTCL). Immunohistochemistry for Ku80 and PDGFR-α was performed on tissue sections from 35 patients diagnosed with NKTCL. We analyzed the relationship between Ku80 and PDGFR-α expression and the clinicopathological features of NKTCL. We further performed multivariate analyses to identify prognostic factors for progression free survival (PFS) of patients. Ku80 expression rate in NKTCL was 94.3% compared with that in reactive lymphoid hyperplasia of nasopharynx (P=0.003). The positive expression rate of PDGFR-α in the group of NKTCL was 91.4% compared with that in control group (P=0.004). The positive correlation between Ku80 and PDGFR-α was also found (r=0.496, P=0.002). Ku80 and PDGFR-α expressions were not correlated with patient's gender, age, B symptoms, LDH, Ann Arbor stage, IPI score and treatment (P>0.05). High expression of Ku80 and PDGFR-α was shown to be correlated with worse PFS (P=0.003 and 0.034, respectively). Multivariate analysis with a Cox proportional hazards model further suggested that Ku80 high expression rate (HR, 11.495; P=0.009), PDGFR-α high expression rate (HR, 4.836; P=0.031) and International ...Continue Reading

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