THE ROLE OF SELENOPROTEIN SYNTHESIS PATHWAY IN ACUTE MYELOID LEUKEMIA

AML是成人中最常见的急性白血病，并且随着年龄的增长而增加。尽管整体 尽管白血病治疗的改善，AML仍然对老年患者具有毁灭性的预后（更少）。 超过10%的患者存活5年）。因此，AML的新疗法是必要的。使用生物信息学 方法和全基因组CRISPR筛选方法，我们确定了硒代谢的调节剂 对AML的存活很重要硒是细胞合成硒代半胱氨酸所必需的， 产生硒蛋白。由于许多硒蛋白参与氧化还原调节，我们假设， 硒代谢是AML的氧化还原维持所必需的。这一假设将在下面进行检验 三个目标。在aim1中，我们将使用我们已经产生的基因突变的小鼠模型， 在CRISPR筛选中鉴定了硒代谢，以检查鼠AML中硒代谢的需求。在目标2中， 我们将使用一个缺乏氧化还原调节因子的小鼠模型，我们假设它位于细胞的下游。 硒代谢途径，以研究这种氧化还原调节剂如何促进小鼠AML。在目标3中，我们 研究我们在人类AML患者来源的异种移植模型中发现的机制， 在AML中抑制硒代谢的治疗潜力。这些基因分析与鼠和 人类AML模型应该为AML如何调节硒代谢以及 靶向这种机制的治疗潜力。

AML is the most common acute leukemia in adults, and it appears increasingly with age. Despite overall improvement in the treatment of leukemia, AML still carries a devastating prognosis for elderly patients (less than 10% of patients survive for 5 years). Thus, new therapies for AML are necessary. Using a bioinformatics approach and a whole-genome CRISPR screening approach, we identified regulators of selenium metabolism to be important for AML survival. Selenium is required for cells to synthesize selenocysteine, which is then used to produce selenoproteins. Since many selenoproteins are involved in redox regulation, we hypothesized that selenium metabolism is required for redox maintenance of AML. This hypothesis will be tested in the following three aims. In aim 1, we will use mouse models that we have generated that have mutations in the genes we identified in the CRISPR screen to examine the requirement of selenium metabolism in murine AML. In aim 2, we will use a mouse model that lacks the redox regulator, which we hypothesize to be downstream of the selenium metabolism pathway, to examine how this redox regulator promotes murine AML. In aim 3, we will study the mechanisms we discovered in human AML patient-derived xenograft models to examine the therapeutic potential of inhibiting selenium metabolism in AML. These genetic analyses with both murine and human AML models should bring novel insights into how AML regulates selenium metabolism and the therapeutic potential of targeting this mechanism.