Characterization of SET/I2PP2A isoforms in dogs.

Characterization of SET/I2PP2A isoforms in dogs.
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DOI:
10.1292/jvms.14-0209
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发表时间:
2014-09
期刊:
The Journal of veterinary medical science
影响因子:
--
通讯作者:
Sato K
Sato K
中科院分区:
其他
文献类型:
--
作者:
Yabe R;Fujiwara N;Mizuno T;Usui T;Ohama T;Sato K

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SET是一种内源性蛋白磷酸酶2A(PP2A)抑制剂,与人类白血病的不良预后相关。以前,我们报道增加SET蛋白在犬淋巴瘤细胞系和潜在的治疗应用SET拮抗剂在犬淋巴瘤。在这里,我们发现犬细胞表达SET蛋白的几种亚型。我们克隆了SET的4种异构体,分别命名为SETα、SET β、SET γ和SET δ。基因组BLAST分析表明,SET基因分别位于X、7、1和8号染色体上。免疫荧光研究显示SETα和β位于核内,SETγ和δ位于核内和胞浆内。我们证实SETα和β具有与PP2A结合的能力。我们的数据揭示了独特的SET亚型的存在,应该考虑在SET靶向药物开发研究的狗。
SET is an endogenous protein phosphatase 2A (PP2A) inhibitor and is associated with a poor prognosis in human leukemia. Previously, we reported increased SET protein levels in canine lymphoma cell lines and the potential therapeutic application of SET antagonists in canine lymphoma. Here, we found that canine cells express several isoforms of the SET protein. We cloned 4 isoforms of SET, named SETα, β, γ and δ. Genomic BLAST showed that the SET genes are located on chromosomes X, 7, 1 and 8, respectively. An immunofluorescent study showed nuclear localization of SETα and β, and nuclear and cytosolic localization of SETγ and δ. We confirmed that SETα and β possess the ability to associate with PP2A. Our data reveal the existence of unique SET isoforms that should be taken into account in SET-targeting drug development studies in dogs.
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