Therapeutic inhibition of FcγRIIb signaling targets leukemic stem cells in chronic myeloid leukemia.
Therapeutic inhibition of FcγRIIb signaling targets leukemic stem cells in chronic myeloid leukemia.
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DOI:
10.1038/s41375-020-0977-8
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发表时间:
2020-10
期刊:
影响因子:
11.4
通讯作者:
Schemionek M
中科院分区:
文献类型:
--
作者:
Parting O;Langer S;Kuepper MK;Wessling C;Li S;Braunschweig T;Chatain N;Maié T;Costa IG;Crysandt M;Huber M;Brümmendorf TH;Koschmieder S;Schemionek M
Despite the successes achieved with molecular targeted inhibition of the oncogenic driver Bcr-Abl in chronic myeloid leukemia (CML), the majority of patients still require lifelong tyrosine kinase inhibitor (TKI) therapy. This is primarily caused by resisting leukemic stem cells (LSCs), which prevent achievement of treatment-free remission in all patients. Here we describe the ITIM (immunoreceptor tyrosine-based inhibition motif)-containing Fc gamma receptor IIb (FcγRIIb, CD32b) for being critical in LSC resistance and show that targeting FcγRIIb downstream signaling, by using a Food and Drug Administration-approved BTK inhibitor, provides a successful therapeutic approach. First, we identified FcγRIIb upregulation in primary CML stem cells. FcγRIIb depletion caused reduced serial re-plaiting efficiency and cell proliferation in malignant cells. FcγRIIb targeting in both a transgenic and retroviral CML mouse model provided in vivo evidence for successful LSC reduction. Subsequently, we identified BTK as a main downstream mediator and targeting the Bcr-Abl-FcγRIIb-BTK axis in primary CML CD34+ cells using ibrutinib, in combination with standard TKI therapy, significantly increased apoptosis in quiescent CML stem cells thereby contributing to the eradication of LSCs.. As a potential curative therapeutic approach, we therefore suggest combining Bcr-Abl TKI therapy along with BTK inhibition.
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影响因子:
50.3
作者:
Gregory MA;Phang TL;Neviani P;Alvarez-Calderon F;Eide CA;O'Hare T;Zaberezhnyy V;Williams RT;Druker BJ;Perrotti D;Degregori J
通讯作者:
Degregori J
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20.3
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通讯作者:
Burger, Jan A.
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通讯作者:
Miura O
影响因子:
51.1
作者:
Mahon, Francois-Xavier;Rea, Delphine;Rousselot, Philippe
通讯作者:
Rousselot, Philippe
影响因子:
20.3
作者:
Jorgensen, Heather G.;Allan, Elaine K.;Holyoake, Tessa L.
通讯作者:
Holyoake, Tessa L.