Humoral immune responses toward tumor-derived antigens in previously untreated patients with chronic lymphocytic leukemia.

ABSTRACT: In chronic lymphocytic leukemia (CLL) the occurrence and the impact of antibody responses toward tumor-derived antigens are largely unexplored. Our serological proteomic data show that antibodies toward 47 identified antigens are detectable in 29 out of 35 patients (83%) with untreated CLL. The glycolytic enzyme alpha-enolase (ENO1) is the most frequently recognized antigen (i.e. 54% of CLL sera). We show that ENO1 is upregulated in the proliferating B-cell fraction of CLL lymph nodes. In CLL cells of the peripheral blood, ENO1 is exclusively expressed at the intracellular level, whereas it is exposed on the surface of apoptotic leukemic cells.From the clinical standpoint, patients with progressive CLL show a higher number of antigen recognitions compared to patients with stable disease. C

SUBMITTER: Griggio V 

PROVIDER: S-EPMC5356881 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature