Internal tandem duplication and tyrosine kinase domain mutations in FLT3 alter the response to daunorubicin in Ba/F3 cells.

Internal tandem duplication and tyrosine kinase domain mutations in FLT3 alter the response to daunorubicin in Ba/F3 cells.
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FLT3 中的内部串联重复和酪氨酸激酶结构域突变改变了 Ba/F3 细胞对柔红霉素的反应。

DOI:
10.3892/br.2015.541
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发表时间:
2016
期刊:
影响因子:
2.3
通讯作者:
Kumi Shirahama
Kumi Shirahama
中科院分区:
--
文献类型:
--
作者:
Shinichirou Takahashi;Kumi Shirahama

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急性髓系白血病的 Fms 相关酪氨酸激酶 3 (FLT3) 受体基因中经常发现内部串联重复 (ITD) 和激活点突变,主要发生在酪氨酸激酶结构域 (TKD) 的天冬氨酸 835 处。 FLT3 中的 ITD (FLT3-ITD) 赋予对多种化疗药物的耐药性;然而,FLT3-ITD和FLT3-TKD突变对这些药物疗效的相对影响尚未报道。在本研究中,在 Ba/F3 细胞中表达了 FLT3 的 ITD 或 TKD 突变形式,因为在缺乏白细胞介素 3 (IL-3) 的情况下,这些细胞的生长完全依赖于 FLT3 致癌信号。结果,当细胞在没有 IL-3 的情况下培养时,柔红霉素的 50% 有效剂量在两个 Ba/F3-FLT3-ITD 克隆中以及两个 Ba/F3-FLT3-TKD 克隆之一中均显着较高。在 Ba/F3-FLT3-ITD 或 Ba/F3-FLT3-TKD 细胞中,阿糖胞苷未观察到这种现象。总的来说,这些结果表明 FLT3 中的 ITD 和 TKD 突变可能会导致 Ba/F3 细胞对柔红霉素产生耐药性。
Internal tandem duplication (ITD) and activating point mutations, mainly at aspartic acid 835 in the tyrosine kinase domain (TKD), are frequently identified in the Fms-related tyrosine kinase 3 (FLT3) receptor gene in acute myeloid leukemia. The ITD in FLT3 (FLT3-ITD) confers resistance to several chemotherapeutic drugs; however, the relative effects of FLT3-ITD and FLT3-TKD mutations on the efficacy of these drugs have not been reported. In the present study, ITD or TKD mutant forms of FLT3 in Ba/F3 cells were expressed, as in the absence of interleukin-3 (IL-3) the growth of these cells is completely dependent on FLT3 oncogenic signals. As a result, the 50% effective dose for daunorubicin was significantly higher in both Ba/F3-FLT3-ITD clones, and also in one of the two Ba/F3-FLT3-TKD clones when cells were cultured without IL-3. This phenomenon was not observed for cytarabine in either Ba/F3-FLT3-ITD or Ba/F3-FLT3-TKD cells. Collectively, these results indicate that ITD and TKD mutations in FLT3 may confer daunorubicin resistance in Ba/F3 cells.
DOI: 10.1182/blood.v97.1.89
发表时间: 2001-01-01
期刊: BLOOD
影响因子: 20.3
作者:
Meshinchi, S;Woods, WG;Radich, JP
通讯作者: Radich, JP
Flt3 内部串联重复突变体通过阻断与 SMRT 的相互作用来抑制转录阻遏蛋白的功能。
DOI: 10.1182/blood-2003-08-2759
发表时间: 2004
期刊: Blood
影响因子: 20.3
作者:
Takahashi,Shinichiro;McConnell,MelanieJ;Harigae,Hideo;Kaku,Mitsuo;Sasaki,Takeshi;Melnick,AriM;Licht,JonathanD
通讯作者: Licht,JonathanD