CDK4/6 inhibitor-mediated cell overgrowth triggers osmotic and replication stress to promote senescence
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
StandardStandard
Yn: Molecular Cell, Cyfrol 83, Rhif 22, 16.11.2023, t. 4062-4077.
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
HarvardHarvard
APA
CBE
MLA
VancouverVancouver
Author
RIS
TY - JOUR
T1 - CDK4/6 inhibitor-mediated cell overgrowth triggers osmotic and replication stress to promote senescence
AU - Crozier, Lisa
AU - Foy, Reece
AU - adib, Rozita
AU - Kar, Ananya
AU - Holt, Jordan
AU - Pareri, Aanchal
AU - Valverde, Juan
AU - Riviera, Rene
AU - Weston, William
AU - Wilson, Rona
AU - Regnault, Clement
AU - Whitfield, Phil
AU - Badonyi, Mihaly
AU - Bennett, Laura
AU - Vernon, Ellen
AU - Gamble, Amelia
AU - Marsh, Joseph
AU - Staples, Christopher
AU - Saurin, Adrian
AU - Barr, Alexsis
AU - Ly, Tony
PY - 2023/11/16
Y1 - 2023/11/16
N2 - Abnormal increases in cell size are associated with senescence and cell cycle exit. The mechanisms by which overgrowth primes cells to withdraw from the cell cycle remain unknown. We address this question using CDK4/6 inhibitors, which arrest cells in G0/G1 and are licensed to treat advanced HR+/HER2− breast cancer. We demonstrate that CDK4/6-inhibited cells overgrow during G0/G1, causing p38/p53/p21-dependent cell cycle withdrawal. Cell cycle withdrawal is triggered by biphasic p21 induction. The first p21 wave is caused by osmotic stress, leading to p38- and size-dependent accumulation of p21. CDK4/6 inhibitor washout results in some cells entering S-phase. Overgrown cells experience replication stress, resulting in a second p21 wave that promotes cell cycle withdrawal from G2 or the subsequent G1. We propose that the levels of p21 integrate signals from overgrowth-triggered stresses to determine cell fate. This model explains how hypertrophy can drive senescence and why CDK4/6 inhibitors have long-lasting effects in patients.
AB - Abnormal increases in cell size are associated with senescence and cell cycle exit. The mechanisms by which overgrowth primes cells to withdraw from the cell cycle remain unknown. We address this question using CDK4/6 inhibitors, which arrest cells in G0/G1 and are licensed to treat advanced HR+/HER2− breast cancer. We demonstrate that CDK4/6-inhibited cells overgrow during G0/G1, causing p38/p53/p21-dependent cell cycle withdrawal. Cell cycle withdrawal is triggered by biphasic p21 induction. The first p21 wave is caused by osmotic stress, leading to p38- and size-dependent accumulation of p21. CDK4/6 inhibitor washout results in some cells entering S-phase. Overgrown cells experience replication stress, resulting in a second p21 wave that promotes cell cycle withdrawal from G2 or the subsequent G1. We propose that the levels of p21 integrate signals from overgrowth-triggered stresses to determine cell fate. This model explains how hypertrophy can drive senescence and why CDK4/6 inhibitors have long-lasting effects in patients.
U2 - 10.1016/j.molcel.2023.10.016
DO - 10.1016/j.molcel.2023.10.016
M3 - Article
VL - 83
SP - 4062
EP - 4077
JO - Molecular Cell
JF - Molecular Cell
SN - 1097-2765
IS - 22
ER -