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@article{1477620, author = {Pavlasová, Gabriela and Borský, Marek and Šandová, Veronika and Oppelt, Jan and Amruz Černá, Kateřina and Novotná, Jitka and Šeda, Václav and Fojtová, Miloslava and Fajkus, Jiří and Brychtová, Yvona and Doubek, Michael and Pospíšilová, Šárka and Mayer, Jiří and Mráz, Marek}, article_location = {London}, article_number = {9}, doi = {http://dx.doi.org/10.1038/s41375-018-0211-0}, keywords = {CHRONIC LYMPHOCYTIC-LEUKEMIA; B-CELLS; EXPRESSION; COMPLEMENT}, language = {eng}, issn = {0887-6924}, journal = {Leukemia}, title = {Rituximab primarily targets an intra-clonal BCR signaling proficient CLL subpopulation characterized by high CD20 levels}, url = {https://www.nature.com/articles/s41375-018-0211-0}, volume = {32}, year = {2018} }
TY - JOUR ID - 1477620 AU - Pavlasová, Gabriela - Borský, Marek - Šandová, Veronika - Oppelt, Jan - Amruz Černá, Kateřina - Novotná, Jitka - Šeda, Václav - Fojtová, Miloslava - Fajkus, Jiří - Brychtová, Yvona - Doubek, Michael - Pospíšilová, Šárka - Mayer, Jiří - Mráz, Marek PY - 2018 TI - Rituximab primarily targets an intra-clonal BCR signaling proficient CLL subpopulation characterized by high CD20 levels JF - Leukemia VL - 32 IS - 9 SP - 2028-2031 EP - 2028-2031 PB - Nature Publishing Group SN - 08876924 KW - CHRONIC LYMPHOCYTIC-LEUKEMIA KW - B-CELLS KW - EXPRESSION KW - COMPLEMENT UR - https://www.nature.com/articles/s41375-018-0211-0 N2 - The use of the anti-CD20 antibody rituximab has improved the outcome of patients with chronic lymphocytic leukemia (CLL). Rituximab was shown to act via various mechanisms, such as antibody-dependent cell-mediated cytotoxicity (ADCC), complement-dependent cytotoxicity (CDC), direct apoptosis, or sensitization to chemotherapy (reviewed in ref. [1]). However, the biological function of CD20 and the reasons for the impressive activity of rituximab and other anti-CD20 antibodies remain elusive. It has been suggested, but remains controversial, whether CD20 functions as a calcium channel, couples with CD40 and MHCII, or B-cell receptor (BCR), and whether it has a role in T cell-dependent and -independent immunity [1,2,3,4]. This is also of great clinical interest for the design of combinatorial treatment of rituximab with BCR inhibitors, DNA damaging or immunomodulatory drugs, or CAR T cells. We have previously shown that microenvironmental interactions upregulate the CD20 levels on CLL cells through the CXCR4/SDF-1 axis [5]. Here we describe that higher CD20 expression has a direct role in the BCR signaling in CLL cells, and a BCR-proficient intra-clonal CLL cell subpopulation is more efficiently eliminated by rituximab in vivo due to higher CD20 levels. ER -
PAVLASOVÁ, Gabriela, Marek BORSKÝ, Veronika ŠANDOVÁ, Jan OPPELT, Kateřina AMRUZ ČERNÁ, Jitka NOVOTNÁ, Václav ŠEDA, Miloslava FOJTOVÁ, Jiří FAJKUS, Yvona BRYCHTOVÁ, Michael DOUBEK, Šárka POSPÍŠILOVÁ, Jiří MAYER a Marek MRÁZ. Rituximab primarily targets an intra-clonal BCR signaling proficient CLL subpopulation characterized by high CD20 levels. \textit{Leukemia}. London: Nature Publishing Group, 2018, roč.~32, č.~9, s.~2028-2031. ISSN~0887-6924. Dostupné z: https://dx.doi.org/10.1038/s41375-018-0211-0.
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