@article{oai:nagasaki-u.repo.nii.ac.jp:00001308,
 author = {Miyakoda, Mana and Honma, Kiri and Kimura, Daisuke and Akbari, Masoud and Kimura, Kazumi and Matsuyama, Toshifumi and Yui, Katsuyuki},
 issue = {8},
 journal = {European Journal of Immunology},
 month = {Aug},
 note = {Interferon regulatory factor 4 (IRF4) has critical roles in immune cell differentiation and function and is indispensable for clonal expansion and effector function in T cells. Here, we demonstrate that the AKT pathway is impaired in murine CD8+ T cells lacking IRF4. The expression of phosphatase and tensin homolog (PTEN), a negative regulator of the AKT pathway, was elevated in Irf4?/? CD8+ T cells. Inhibition of PTEN partially rescued downstream events, suggesting that PTEN constitutes a checkpoint in the IRF4-mediated regulation of cell signaling. Despite the clonal expansion defect, in the 
absence of IRF4, memory-like CD8+ T cells could be generated and maintained, although unable to expand in recall responses. The homeostatic proliferation of naive Irf4?/? CD8+ T cells was impaired, whereas their number eventually reached a level similar to that of wild-type CD8+ T cells. Conversely, memory-like Irf4?/? CD8+ T cells underwent homeostatic proliferation in a manner similar to that of wild-type memory CD8+ T cells. These results suggest that IRF4 regulates the clonal expansion of CD8+ T cells at least in part via the AKT signaling pathway. Moreover, IRF4 regulates the homeostatic proliferation of naive CD8+ T cells, whereas the maintenance of memory CD8+ T cells is IRF4-independent., European Journal of Immunology, 48(8), pp.1319-1328; 2018},
 pages = {1319--1328},
 title = {Differential requirements for IRF4 in the clonal expansion and homeostatic proliferation of naive and memory murine CD8+ T?cells},
 volume = {48},
 year = {2018}
}