Activin receptor-like kinase5 inhibition suppresses mouse melanoma by ubiquitin degradation of Smad4, thereby derepressing eomesodermin in cytotoxic T lymphocytes.
Activin receptor-like kinase5 inhibition suppresses mouse melanoma by ubiquitin degradation of Smad4, thereby derepressing eomesodermin in cytotoxic T lymphocytes.
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DOI:
10.1002/emmm.201302524
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发表时间:
2013-11
影响因子:
11.1
通讯作者:
Mamura, Mizuko
中科院分区:
文献类型:
--
作者:
Yoon, Jeong-Hwan;Jung, Su Myung;Park, Seok Hee;Kato, Mitsuyasu;Yamashita, Tadashi;Lee, In-Kyu;Sudo, Katsuko;Nakae, Susumu;Han, Jin Soo;Kim, Ok-Hee;Oh, Byung-Chul;Sumida, Takayuki;Kuroda, Masahiko;Ju, Ji-Hyeon;Jung, Kyeong Cheon;Park, Seong Hoe;Kim, Dae-Kee;Mamura, Mizuko
Varieties of transforming growth factor-β (TGF-β) antagonists have been developed to intervene with excessive TGF-β signalling activity in cancer. Activin receptor-like kinase5 (ALK5) inhibitors antagonize TGF-β signalling by blocking TGF-β receptor-activated Smad (R-Smad) phosphorylation. Here we report the novel mechanisms how ALK5 inhibitors exert a therapeutic effect on a mouse B16 melanoma model. Oral treatment with a novel ALK5 inhibitor, EW-7197 (2.5 mg/kg daily) or a representative ALK5 inhibitor, LY-2157299 (75 mg/kg bid) suppressed the progression of melanoma with enhanced cytotoxic T-lymphocyte (CTL) responses. Notably, ALK5 inhibitors not only blocked R-Smad phosphorylation, but also induced ubiquitin-mediated degradation of the common Smad, Smad4 mainly in CD8+ T cells in melanoma-bearing mice. Accordingly, T-cell-specific deletion of Smad4 was sufficient to suppress the progression of melanoma. We further identified eomesodermin (Eomes), the T-box transcription factor regulating CTL functions, as a specific target repressed by TGF-β via Smad4 and Smad3 in CD8+ T cells. Thus, ALK5 inhibition enhances anti-melanoma CTL responses through ubiquitin-mediated degradation of Smad4 in addition to the direct inhibitory effect on R-Smad phosphorylation.
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影响因子:
30.5
作者:
Intlekofer, AM;Takemoto, N;Reiner, SL
通讯作者:
Reiner, SL
影响因子:
32.4
作者:
Chang X;Liu F;Wang X;Lin A;Zhao H;Su B
通讯作者:
Su B
影响因子:
3.4
作者:
De Boeck M;ten Dijke P
通讯作者:
ten Dijke P
影响因子:
20.3
作者:
Cho, Hyun-Il;Lee, Young-Ran;Celis, Esteban
通讯作者:
Celis, Esteban
影响因子:
32.4
作者:
Lee, PP;Fitzpatrick, DR;Wilson, CB
通讯作者:
Wilson, CB