2007
DOI: 10.4161/cc.6.6.4021
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SUMO is Growing Senescent

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Cited by 34 publications
(29 citation statements)
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“…These results highlight the importance of PML or ARF loss in tumors (1,43) and that of SUMOylation in cancer progression (44,45).…”
Section: Discussionmentioning
confidence: 67%
“…These results highlight the importance of PML or ARF loss in tumors (1,43) and that of SUMOylation in cancer progression (44,45).…”
Section: Discussionmentioning
confidence: 67%
“…This analysis revealed that the concentration of SUMO-conjugated proteins was considerably higher in Trim32 -/-cells, even in the absence of MG132 (Figure 8, A and B). Though the exact role of the SUMO pathway in implementing senescence is obscure, increased levels of sumoylation in senescent cells, as compared with presenescent or quiescent cells, has been reported (22). Finally, suppression of PIAS4 by siRNA resulted in a reduction of sumoylation levels as well as the levels of p53 and HP1γ in primary myoblasts ( Figure 8C).…”
Section: Figurementioning
confidence: 84%
“…The sumoylation pathway regulates a wide range of cellular events, similar to ubiquitination (20). Recently, it was demonstrated that overexpression of PIAS4 or SUMO-2/3 led to senescence in several different cell models, thus implicating PIAS4 and sumoylation in regulation of cellular senescence (21)(22)(23). Senescence was first described as irreversible proliferation arrest that limits the replicative ability of cultured cells, a process termed "replicative senescence" (24).…”
Section: Introductionmentioning
confidence: 99%
“…Les modifications post-traductionnelles massives qui affectent p53 suggèrent la possibilité d'un code de modification de p53 (et/ou Rb) similaire au code des histones. Ce code pourrait conditionner l'orientation de la cellule vers la sénescence, l'apoptose ou l'arrêt transitoire de croissance [9][10][11]. Bien que les activités des CKI ne soient pas toutes équivalentes, on sait que, pour l'essentiel, ces inhibiteurs maintiennent Rb dans un état hypophosphorylé, donc actif.…”
Section: Modifications Des Régulateurs Du Cycle Cellulaire Au Cours Dunclassified
“…La formation de ces foyers dépend de l'état fonctionnel du gène Rb, ainsi que de l'expression des protéines de la famille HMG (high mobility group), de PML (promyelocytic leukemia), de PIASy (protein inhibitor of activated STAT) et de certains chaperons d'histones. Les SAHF comportent plusieurs marqueurs d'hétérochromatine transcriptionnellement réprimée comme HP1 (heterochromatin protein 1) ou les formes di-et tri-méthylées sur la lysine 9 de l'histone H3 (H3K9me2/3) [9][10][11]. Bien qu'aucune preuve solide ne soit disponible à ce jour, on pense que la formation de ces foyers bloquerait les cellules de façon irréversible dans un état sénescent en réprimant tout particulièrement les cibles de E2F.…”
unclassified