Tumor-stroma interaction increases CD147 expression in neoplastic B lymphocytes in chronic lymphocytic leukemia

GILARDONI MB * CO-AUTHOR

BLOOD CELLS MOLECULES AND DISEASES

ACADEMIC PRESS INC ELSEVIER SCIENCE

Lugar: Amsterdam; Año: 2020

1079-9796

ackground: Chronic lymphocytic leukemia (CLL) microenvironment plays a critical role in disease pathogenesis.Matrix metalloproteinases (MMPs) are involved in CLL-B cell migration and survival. CD147 is associatedwith MMPs production by tumor and stromal cells.Aim: To analyze CD147, MMP2 and MMP9 expression in CLL-B cells and its modulation by fibroblasts (Fb)-CLLBcell interaction.Methods: CLL-B cells were co-cultured with Fb, as a simulation of CLL microenvironment. CD147 was evaluatedin healthy donor (HD)-B cells and CLL-B cells by flow cytometry. MMP2 and MMP9 activity in CLL-plasmasamples and conditioned media (CMs) was studied by zymography.Results: MMP9/MMP2 plasma levels were significantly higher in CLL patients than in HD. CD147 expression(median fluorescence intensity) in CLL patients characterized 3 groups: low- (19.1 ± 3.2; n=3), middle-(42.7 ± 12.8; n=18) and high- (76.5 ± 9.6; n=5) related to CD147 expression in HD-B cells. CD147 expressionsignificantly increased in CLL-B