Editace leukemických B-buněk pomocí CRISPR/Cas9: hledání cílů miR-155 účastnících se procesu leukemogeneze

Sypecká, Markéta

CRISPR/Cas9 editing of leukemic B-cells: searching for microRNA-155 targets involved in the process of leukemogenesis Introduction: Chronic lymphocytic leukemia (chronic lymphoid leukemia, CLL) is a monoclonal disorder characterized by a progressive accumulation of functionally incompetent B-lymphocytes. CLL is the most common form of leukemia found in adults in Western countries. Course of the disease can differ: some patients die rapidly, within 2-3 years of diagnosis, mainly due to complications from CLL, but most patients live 5-10 years. However, with disease progression significantly increases level of miR-155, which is known as oncomiR. MicroRNAs (miRNAs) represent negative regulators of gene expression. MiR-155 affects genes, which are involved in leukemogenesis and cell cycle. And it is known, that miR-155 suppresses its targets (similarly as other miRNAs). We hypothesized that by gene editing of CLL cells we unblock miR-155 targets and find out correlation between these targets (known and unknown) with CLL leukemogenesis. Methods: We used CRISPR/Cas9 method for gene editing, which enables the deletion of mature miR-155 sequence in the genome of leukemic B-cells. CRISPR/Cas9 plasmid was transferred to the leukemic B-cell cell line HG-3 via nucleofection. Clones with successful transfer of...

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