The Cell Protective Effect of Adenine on Hypoxia–Reoxygenation Injury through PPAR Delta Activation

Ischemia followed by blood supply reperfusion in cardiomyocytes leads to an overproduction of free radicals and a rapid decrease of adenosine triphosphate concentration. The cardioprotective effect of a potential drug, adenine, was evaluated using H9c2 rat cardiomyoblasts. After hypoxia–reoxygenation (HR) treatment consisting of hypoxia for 21 h followed by reoxygenation for 6 h, it was revealed that pretreatment with 200 µM adenine for 2 h effectively prevented HR-induced cell death. Adenine also significantly decreased the production of reactive oxygen species and reduced cell apoptosis after HR injury. The antioxidant effect of adenine was also revealed in this study. Adenine pretreatment significantly reduced the expression of activating transcription factor 4 (ATF4) and glucose-regulated protein 78 (GRP78) proteins, and protein disulfide isomerase induced a protective effect on mitochondria after HR stimulation. Intracellular adenosine monophosphate-activated protein kinase, peroxisome proliferator-activated receptor delta (PPARδ), and perilipin levels were increased by adenine after HR stimulation. Adenine had a protective effect in HR-damaged H9c2 cells. It may be used in multiple preventive medicines in the future.

Nobiletin Reduces Lipid Accumulation in Sebocytes and Inhibits PPAR Delta Activation in Epidermal Tissue Models

Background: Acne vulgaris is a chronic inflammatory disease that affects the majority of the population at some point in their lifetime. Acne pathogenesis is multifactorial with four primary contributors that play a pivotal role in the formation of acne lesions: inflammation, androgeninduced sebum production, abnormal keratinization, and bacterial colonization. Recent studies have demonstrated the anti-inflammatory, anticarcinogenic, anti-diabetic, and anti-lipid properties of certain Polymethoxylated Flavones (PMF) derivatives.