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- W4377011730 abstract "Chemotherapeutic regimens containing sorafenib are widely used in salvage treatment for patients with relapsed and refractory acute leukemia, especially those with FLT3-ITD mutations. However, the therapeutic effects in individuals are heterogeneous, and the effective maintenance period is relatively short. Our clinical analysis showed patients with high c-kit (CD117) expression in leukemia cells generally had a better response to sorafenib, but the reason for this finding was not clear. c-kit (CD117) is a receptor tyrosine kinase, and its signal inactivation and hydrolytic metabolism are regulated by the CBL protein, a Ring finger E3 ubiquitin ligase, encoded by the c-CBL gene. And we also found that the c-CBL gene expression in refractory and relapsed patients was significantly lower than that in healthy hematopoietic stem cell donors. Therefore, we assumed that there is a relationship among c-CBL gene function, high expression of c-kit (CD117) and a better clinical response to sorafenib. To confirm this hypothesis, we packaged interfering lentiviruses and overexpressed adenoviruses targeting the c-CBL gene respectively, and infected leukemia cell lines with these viruses to regulate the expression of the c-CBL gene, and observed the subsequent changes of these cells in various biological behaviors. Our results showed when the c-CBL gene was silenced, the cells proliferation was accelerated, drug sensitivity to cytarabine or sorafenib was decreased, and apoptosis ratio was decreased. And all these phenomena were reversed when the gene was overexpressed, which confirmed the expression of c-CBL gene was related to drug resistance in leukemia cells. At last, we explored the possible molecular mechanisms underlying these phenomena." @default.
- W4377011730 created "2023-05-19" @default.
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- W4377011730 date "2023-05-18" @default.
- W4377011730 modified "2023-10-16" @default.
- W4377011730 title "Sorafenib regulates <i>c-CBL</i> gene-mediated chemoresistance in acute myeloid leukemia cells" @default.
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- W4377011730 doi "https://doi.org/10.1080/16078454.2023.2204620" @default.
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