Loss of tRNA-modifying enzyme Elp3 activates a p53-dependent antitumor checkpoint in hematopoiesis.
Loss of tRNA-modifying enzyme Elp3 activates a p53-dependent antitumor checkpoint in hematopoiesis.
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DOI:
10.1084/jem.20200662
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发表时间:
2021-03-01
期刊:
影响因子:
--
通讯作者:
Desmet CJ
中科院分区:
文献类型:
--
作者:
Rosu A;El Hachem N;Rapino F;Rouault-Pierre K;Jorssen J;Somja J;Ramery E;Thiry M;Nguyen L;Jacquemyn M;Daelemans D;Adams CM;Bonnet D;Chariot A;Close P;Bureau F;Desmet CJ
Loss of Elp3, the catalytic subunit of the tRNA modifying complex Elongator, activates a p53-dependent antitumor checkpoint, leading to the death of committing hematopoietic progenitors in mice. Bypass of this checkpoint through p53 gene deletion or spontaneous mutation promotes leukemia/lymphoma. The hematopoietic system is highly sensitive to perturbations in the translational machinery, of which an emerging level of regulation lies in the epitranscriptomic modification of transfer RNAs (tRNAs). Here, we interrogate the role of tRNA anticodon modifications in hematopoiesis by using mouse models of conditional inactivation of Elp3, the catalytic subunit of Elongator that modifies wobble uridine in specific tRNAs. Loss of Elp3 causes bone marrow failure by inducing death in committing progenitors and compromises the grafting activity of hematopoietic stem cells. Mechanistically, Elp3 deficiency activates a p53-dependent checkpoint in what resembles a misguided amino acid deprivation response that is accompanied by Atf4 overactivation and increased protein synthesis. While deletion of p53 rescues hematopoiesis, loss of Elp3 prompts the development of p53-mutated leukemia/lymphoma, and inactivation of p53 and Elongator cooperatively promotes tumorigenesis. Specific tRNA-modifying enzymes thus condition differentiation and antitumor fate decisions in hematopoietic stem cells and progenitors.
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影响因子:
21.3
作者:
Liu X;Zhang Y;Ni M;Cao H;Signer RAJ;Li D;Li M;Gu Z;Hu Z;Dickerson KE;Weinberg SE;Chandel NS;DeBerardinis RJ;Zhou F;Shao Z;Xu J
通讯作者:
Xu J
影响因子:
21.3
作者:
通讯作者:
--
影响因子:
11.8
作者:
Laguesse, Sophie;Creppe, Catherine;Nguyen, Laurent
通讯作者:
Nguyen, Laurent
影响因子:
64.5
作者:
Khajuria RK;Munschauer M;Ulirsch JC;Fiorini C;Ludwig LS;McFarland SK;Abdulhay NJ;Specht H;Keshishian H;Mani DR;Jovanovic M;Ellis SR;Fulco CP;Engreitz JM;Schütz S;Lian J;Gripp KW;Weinberg OK;Pinkus GS;Gehrke L;Regev A;Lander ES;Gazda HT;Lee WY;Panse VG;Carr SA;Sankaran VG
通讯作者:
Sankaran VG
影响因子:
4.8
作者:
Close, Pierre;Gillard, Magali;Chariot, Alain
通讯作者:
Chariot, Alain