GSK137, a potent small-molecule BCL6 inhibitor with in vivo activity, suppresses antibody responses in mice.
GSK137, a potent small-molecule BCL6 inhibitor with in vivo activity, suppresses antibody responses in mice.
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DOI:
10.1016/j.jbc.2021.100928
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发表时间:
2021-08
期刊:
影响因子:
--
通讯作者:
Wagner SD
中科院分区:
文献类型:
--
作者:
Pearce AC;Bamford MJ;Barber R;Bridges A;Convery MA;Demetriou C;Evans S;Gobbetti T;Hirst DJ;Holmes DS;Hutchinson JP;Jayne S;Lezina L;McCabe MT;Messenger C;Morley J;Musso MC;Scott-Stevens P;Manso AS;Schofield J;Slocombe T;Somers D;Walker AL;Wyce A;Zhang XP;Wagner SD
B-cell lymphoma 6 (BCL6) is a zinc finger transcriptional repressor possessing a BTB–POZ (BR-C, ttk, and bab for BTB; pox virus and zinc finger for POZ) domain, which is required for homodimerization and association with corepressors. BCL6 has multiple roles in normal immunity, autoimmunity, and some types of lymphoma. Mice bearing disrupted BCL6 loci demonstrate suppressed high-affinity antibody responses to T-dependent antigens. The corepressor binding groove in the BTB–POZ domain is a potential target for small compound-mediated therapy. Several inhibitors targeting this binding groove have been described, but these compounds have limited or absent in vivo activity. Biophysical studies of a novel compound, GSK137, showed an in vitro pIC50 of 8 and a cellular pIC50 of 7.3 for blocking binding of a peptide derived from the corepressor silencing mediator for retinoid or thyroid hormone receptors to the BCL6 BTB–POZ domain. The compound has good solubility (128 μg/ml) and permeability (86 nM/s). GSK137 caused little change in cell viability or proliferation in four BCL6-expressing B-cell lymphoma lines, although there was modest dose-dependent accumulation of G1 phase cells. Pharmacokinetic studies in mice showed a profile compatible with achieving good levels of target engagement. GSK137, administered orally, suppressed immunoglobulin G responses and reduced numbers of germinal centers and germinal center B cells following immunization of mice with the hapten trinitrophenol. Overall, we report a novel small-molecule BCL6 inhibitor with in vivo activity that inhibits the T-dependent antigen immune response.
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影响因子:
3.6
作者:
Hara, Yasushi;Tashiro, Yasuyuki;Azuma, Takachika
通讯作者:
Azuma, Takachika
影响因子:
11.2
作者:
Deb D;Rajaram S;Larsen JE;Dospoy PD;Marullo R;Li LS;Avila K;Xue F;Cerchietti L;Minna JD;Altschuler SJ;Wu LF
通讯作者:
Wu LF
影响因子:
7.3
作者:
Bellenie, Benjamin R.;Cheung, Kwai-Ming J.;Hoelder, Swen
通讯作者:
Hoelder, Swen
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
30.8
作者:
Bereshchenko, OR;Gu, W;Dalla-Favera, R
通讯作者:
Dalla-Favera, R