A high-throughput assay for directly monitoring nucleolar rRNA biogenesis.
A high-throughput assay for directly monitoring nucleolar rRNA biogenesis.
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DOI:
10.1098/rsob.210305
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发表时间:
2022-01
期刊:
影响因子:
5.8
通讯作者:
Baserga SJ
中科院分区:
文献类型:
--
作者:
Bryant CJ;McCool MA;Abriola L;Surovtseva YV;Baserga SJ
Studies of the regulation of nucleolar function are critical for ascertaining clearer insights into the basic biological underpinnings of ribosome biogenesis (RB), and for future development of therapeutics to treat cancer and ribosomopathies. A number of high-throughput primary assays based on morphological alterations of the nucleolus can indirectly identify hits affecting RB. However, there is a need for a more direct high-throughput assay for a nucleolar function to further evaluate hits. Previous reports have monitored nucleolar rRNA biogenesis using 5-ethynyl uridine (5-EU) in low-throughput. We report a miniaturized, high-throughput 5-EU assay that enables specific calculation of nucleolar rRNA biogenesis inhibition, based on co-staining of the nucleolar protein fibrillarin (FBL). The assay uses two siRNA controls: a negative non-targeting siRNA control and a positive siRNA control targeting RNA Polymerase 1 (RNAP1; POLR1A), and specifically quantifies median 5-EU signal within nucleoli. Maximum nuclear 5-EU signal can also be used to monitor the effects of putative small-molecule inhibitors of RNAP1, like BMH-21, or other treatment conditions that cause FBL dispersion. We validate the 5-EU assay on 68 predominately nucleolar hits from a high-throughput primary screen, showing that 58/68 hits significantly inhibit nucleolar rRNA biogenesis. Our new method establishes direct quantification of nucleolar function in high-throughput, facilitating closer study of RB in health and disease.
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影响因子:
14.9
作者:
Dong C;An L;Yu CH;Huen MSY
通讯作者:
Huen MSY
DOI:
10.1002/cpz1.89
发表时间:
2021-05
期刊:
Current protocols
影响因子:
--
作者:
Dobson ETA;Cimini B;Klemm AH;Wählby C;Carpenter AE;Eliceiri KW
通讯作者:
Eliceiri KW
影响因子:
12.3
作者:
Carpenter AE;Jones TR;Lamprecht MR;Clarke C;Kang IH;Friman O;Guertin DA;Chang JH;Lindquist RA;Moffat J;Golland P;Sabatini DM
通讯作者:
Sabatini DM
影响因子:
5.3
作者:
Engel, Krysta L.;French, Sarah L.;Schneider, David A.
通讯作者:
Schneider, David A.
影响因子:
5.6
作者:
Dvořáčková M;Fajkus J
通讯作者:
Fajkus J