Volume 5, Issue 3 (Aug 2017)                   Res Mol Med (RMM) 2017, 5(3): 0-0 | Back to browse issues page


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Abstract:   (212 Views)
Background: Previously, we showed that exhausted CD4+ and CD8+ T cells in chronic lymphocytic leukemia (CLL) co-express the two immune-inhibitory receptors, Tim-3 and PD-1. Here, we investigated the expression of Blimp-1, a transcription factor involving in T-cell exhaustion, in patients with CLL.
Methods: Peripheral blood mononuclear cells were collected from 25 untreated CLL patients and 15 sex- and age-matched normal subjects. CLL patients were clinically classified according to the Rai staging system. The relative expression of Blimp-1 mRNA was determined by quantitative Reverse Transcriptase Polymerase Chain Reaction (qRT-PCR) after normalization with β-actin.
Results: Expression of Blimp-1 mRNA was much higher in CLL patients than in normal controls (p=0.001). Moreover, Blimp-1 was higher expressed in patients with advanced clinical stages of CLL compared to those with early stages of the disease (p=0.01). Interestingly, the Blimp-1 expression was correlated with the frequencies of exhausted Tim-3+/PD-1+/CD4+ and Tim-3+/PD-1+/CD8+ T cells in CLL patients.
Conclusions: Our results highlight the role of Blimp-1 transcription factor in T cell exhaustion of CLL.
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Type of Study: Research | Subject: Immunology
Received: 2017/10/28 | Accepted: 2017/12/16 | Published: 2017/12/16