Loss of Pla2r1 decreases cellular senescence and age-related alterations caused by aging and Western diets.
Amélie MasseminDelphine GoehrigJean-Michel FlamanSara JaberAudrey GriveauSophia DjebaliElisabeth MarcosLéa PayenJacqueline MarvelRomain ParentSerge AdnotPhilippe BertolinoJennifer RieussetAntonin TortereauDavid VindrieuxDavid BernardPublished in: Aging cell (2023)
Cellular senescence is induced by many stresses including telomere shortening, DNA damage, oxidative, or metabolic stresses. Senescent cells are stably cell cycle arrested and they secrete many factors including cytokines and chemokines. Accumulation of senescent cells promotes many age-related alterations and diseases. In this study, we investigated the role of the pro-senescent phospholipase A2 receptor 1 (PLA2R1) in regulating some age-related alterations in old mice and in mice subjected to a Western diet, whereas aged wild-type mice displayed a decreased ability to regulate their glycemia during glucose and insulin tolerance tests, aged Pla2r1 knockout (KO) mice efficiently regulated their glycemia and displayed fewer signs of aging. Loss of Pla2r1 was also found protective against the deleterious effects of a Western diet. Moreover, these Pla2r1 KO mice were partially protected from diet-induced senescent cell accumulation, steatosis, and fibrosis. Together these results support that Pla2r1 drives several age-related alterations, especially in the liver, arising during aging or through a Western diet.
Keyphrases
- wild type
- high fat diet induced
- dna damage
- cell cycle
- weight loss
- south africa
- induced apoptosis
- physical activity
- type diabetes
- insulin resistance
- cell proliferation
- endothelial cells
- oxidative stress
- cell cycle arrest
- adipose tissue
- stem cells
- mesenchymal stem cells
- dna repair
- metabolic syndrome
- cell therapy
- anti inflammatory
- transcription factor
- cell death
- high resolution
- atomic force microscopy
- high speed