TY - JOUR
T1 - Migration arrest of chemoresistant leukemia cells mediated by MRTF-SRF pathway
AU - Morimatsu, Maho
AU - Yamashita, Erika
AU - Seno, Shigeto
AU - Sudo, Takao
AU - Kikuta, Junichi
AU - Mizuno, Hiroki
AU - Okuzaki, Daisuke
AU - Motooka, Daisuke
AU - Ishii, Masaru
N1 - Publisher Copyright:
© 2020 The Author(s).
PY - 2020/7/6
Y1 - 2020/7/6
N2 - Background: Dormant chemotherapy-resistant leukemia cells can survive for an extended period before relapse. Nevertheless, the mechanisms underlying the development of chemoresistance in vivo remain unclear. Methods: Using intravital bone imaging, we characterized the behavior of murine acute myeloid leukemia (AML) cells (C1498) in the bone marrow before and after chemotherapy with cytarabine. Results: Proliferative C1498 cells exhibited high motility in the bone marrow. Cytarabine treatment impaired the motility of residual C1498 cells. However, C1498 cells regained their migration potential after relapse. RNA sequencing revealed that cytarabine treatment promoted MRTF-SRF pathway activation. MRTF inhibition using CCG-203971 augmented the anti-tumor effects of chemotherapy in our AML mouse model, as well as suppressed the migration of chemoresistant C1498 cells. Conclusions: These results provide novel insight into the role of cell migration arrest on the development of chemoresistance in AML, as well as provide a strong rationale for the modulation of cellular motility as a therapeutic target for refractory AML.
AB - Background: Dormant chemotherapy-resistant leukemia cells can survive for an extended period before relapse. Nevertheless, the mechanisms underlying the development of chemoresistance in vivo remain unclear. Methods: Using intravital bone imaging, we characterized the behavior of murine acute myeloid leukemia (AML) cells (C1498) in the bone marrow before and after chemotherapy with cytarabine. Results: Proliferative C1498 cells exhibited high motility in the bone marrow. Cytarabine treatment impaired the motility of residual C1498 cells. However, C1498 cells regained their migration potential after relapse. RNA sequencing revealed that cytarabine treatment promoted MRTF-SRF pathway activation. MRTF inhibition using CCG-203971 augmented the anti-tumor effects of chemotherapy in our AML mouse model, as well as suppressed the migration of chemoresistant C1498 cells. Conclusions: These results provide novel insight into the role of cell migration arrest on the development of chemoresistance in AML, as well as provide a strong rationale for the modulation of cellular motility as a therapeutic target for refractory AML.
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U2 - 10.1186/s41232-020-00127-6
DO - 10.1186/s41232-020-00127-6
M3 - Article
AN - SCOPUS:85088154768
SN - 1880-9693
VL - 40
JO - Inflammation and Regeneration
JF - Inflammation and Regeneration
IS - 1
M1 - 15
ER -