Non-Canonical Caspase Activity Antagonizes p38 MAPK Stress-Priming Function to Support Development

Endoplasmic Reticulum Stress-Mediated Activation of p38 MAPK, Caspase-2 and Caspase-8 Leads to Abrin-Induced Apoptosis

Abrin from Abrus precatorius plant is a potent protein synthesis inhibitor and induces apoptosis in cells. However, the relationship between inhibition of protein synthesis and apoptosis is not well understood. Inhibition of protein synthesis by abrin can lead to accumulation of unfolded protein in the endoplasmic reticulum causing ER stress. The observation of phosphorylation of eukaryotic ini...

Measurement of p38/MAPK Activity Using LANCE

Nuclear protein NP60 regulates p38 MAPK activity.

The activation of p38alpha is mediated by its upstream kinase and associated proteins. Here we identify a new nuclear protein, NP60, which regulates the activation of p38alpha in response to sorbitol treatment. NP60 specifically binds to p38alpha, but not to JNK and ERK, in vitro and in vivo. Co-transfection of NP60 leads to the phosphorylation and activation of p38alpha, and subsequently resul...

p38 MAPK in development and cancer.

p38 is a MAPK that has been shown to induce a wide variety of biological effects in cell culture in response to a wide range of stimuli. These effects are dependent not only on the stimuli, but also on the cellular context, resulting in a bewildering array of possibilities. For example, p38 was shown to induce apoptosis in some cells, but prevent apoptosis in others. Similarly opposed effects h...

Inactivation of mitogen-activated protein kinase signaling pathway reduces caspase-14 expression in impaired keratinocytes

Objective(s):Several investigations have revealed that caspase-14 is responsible for the epidermal differentiation and cornification, as well as the regulation of moisturizing effect. However, the precise regulation mechanism is still not clear. This study was aimed to investigate the expression of caspase-14 in filaggrin-deficient normal human epidermal keratinocytes (NHEKs) and to explore the...