Targeting Aurora kinase A and JAK2 prevents GVHD while maintaining Treg and antitumor CTL function.

Targeting Aurora kinase A and JAK2 prevents GVHD while maintaining Treg and antitumor CTL function.
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DOI:
10.1126/scitranslmed.aai8269
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发表时间:
2017-01-11
影响因子:
17.1
通讯作者:
Anasetti C
Anasetti C
中科院分区:
医学1区
文献类型:
--
作者:
Betts BC;Veerapathran A;Pidala J;Yang H;Horna P;Walton K;Cubitt CL;Gunawan S;Lawrence HR;Lawrence NJ;Sebti SM;Anasetti C

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移植物抗宿主病(GVHD)是异基因造血细胞移植后非复发死亡的主要原因。CD28对T细胞的共刺激作用会促进GVHD,但针对CD28、雷帕霉素靶蛋白(mTOR)下游靶点或极光激酶A(Aurora A)进行预防时效果并不完全。同样,白细胞介素 - 6(IL - 6)介导的Janus激酶2(JAK2)信号传导会促进同种异体反应性,但抑制JAK2并不能消除GVHD。我们提供的证据表明,在人T细胞中阻断极光激酶A和JAK2在体外具有协同作用,可预防异种GVHD,并维持细胞毒性T淋巴细胞(CTLs)的抗肿瘤反应。极光激酶A/JAK2抑制具有免疫抑制作用,但允许诱导性调节性T细胞(iTregs)分化,这些细胞功能亢进且CD39表达明亮,能有效清除三磷酸腺苷(ATP)。iTreg效力的增强主要是极光激酶A阻断的作用,而JAK2抑制可抑制辅助性T细胞17(TH17)的分化。抑制极光激酶A或JAK2均可显著抑制TH1 T细胞。然而,尽管存在极光激酶A/JAK2阻断,体内产生的CTL仍保留肿瘤特异性杀伤能力。因此,抑制供体T细胞中的CD28和IL - 6信号转导通路可提高调节性T细胞/常规T细胞(Treg/Tconv)的比例,预防GVHD,并保留抗肿瘤的CTL。
Graft-versus-host disease (GVHD) is a leading cause of nonrelapse mortality after allogeneic hematopoietic cell transplantation. T cell costimulation by CD28 contributes to GVHD, but prevention is incomplete when targeting CD28, downstream mammalian target of rapamycin (mTOR), or Aurora A. Likewise, interleukin-6 (IL-6)–mediated Janus kinase 2 (JAK2) signaling promotes alloreactivity, yet JAK2 inhibition does not eliminate GVHD. We provide evidence that blocking Aurora A and JAK2 in human T cells is synergistic in vitro, prevents xenogeneic GVHD, and maintains antitumor responses by cytotoxic T lymphocytes (CTLs). Aurora A/JAK2 inhibition is immunosuppressive but permits the differentiation of inducible regulatory T cells (iTregs) that are hyperfunctional and CD39 bright and efficiently scavenge adenosine triphosphate (ATP). Increased iTreg potency is primarily a function of Aurora A blockade, whereas JAK2 inhibition suppresses T helper 17 (TH17) differentiation. Inhibiting either Aurora A or JAK2 significantly suppresses TH1 T cells. However, CTL generated in vivo retains tumor-specific killing despite Aurora A/JAK2 blockade. Thus, inhibiting CD28 and IL-6 signal transduction pathways in donor T cells can increase the Treg/Tconv ratio, prevent GVHD, and preserve antitumor CTL.
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