Aging in rat causes hepatic hyperresposiveness to interleukin‐1β which is mediated by neutral sphingomyelinase‐2
Kristina Rutkute, Alexander A. Karakashian, Natalia V. Giltiay, Aneta Dobierzewska, Mariana N. Nikolova‐Karakashian – 1 August 2007 – The process of aging has recently been shown to substantially affect the ability of cells to respond to inflammatory challenges. We demonstrate that aging leads to hepatic hyperresponsiveness to interleukin 1β (IL‐1β), and we examine the factors that could be responsible for this phenomenon. IL‐1β‐induced phosphorylation of c‐jun N‐terminal kinase (JNK) in hepatocytes isolated from aged rats was 3 times more potent than that in hepatocytes from young rats.