Explore the vast range of titles available.

Hyperoxia in standard cell cultures (18 kPa O 2 ) imposes cellular oxidative stress, potentially skewing research and drug screening outcomes. Cerebral microvascular endothelial cells (hCMEC/D3) experience no more than 7 kPa O 2 in vivo . In this study, hCMEC/D3 cells were adapted to 5 kPa O 2 for 5 days to optimize an in vitro physiological cell culture model. Using a SYNAPT G2-Si mass spectrometer, we compared the proteomic profiles of cells cultured under 5 kPa versus 18 kPa O 2 . A substantial proteomic shift under hyperoxia highlighted the strong impact of oxygen levels on protein expression. We further investigated the effect of oxygen levels on drug screening using sulforaphane (SFN), an inducer of NRF2-regulated antioxidant defense genes. SFN induced more pronounced changes in proteomic profiles under 18 kPa O 2 compared to 5 kPa, indicating oxygen-dependent cellular drug responses. This dataset offers a valuable resource for analyzing oxygen-sensitive proteomic changes. Comparative studies using different drugs or cell types could further elucidate oxygen-dependent signaling and inform the development of therapies aligned with physiological oxygen levels.

Diabetic nephropathy (DN) is a leading cause of end-stage renal disease, characterized by progressive kidney dysfunction. Early detection and targeted therapies remain key challenges in managing DN. This study aims to identify proteomic alterations in DN patients compared to healthy controls, focusing on proteins involved in inflammation, oxidative stress, immune response, and metabolic dysregulation. Using mass spectrometry and advanced bioinformatics, we identified significant upregulation of proteins associated with platelet activation, immune regulation, and extracellular matrix remodeling, as well as downregulation of proteins linked to lipid metabolism, immune regulation, and structural stability. These findings highlight the molecular complexity of DN and suggest that altered protein expression plays a critical role in the progression of kidney damage. The identified proteins may serve as potential biomarkers for early diagnosis and therapeutic targets for DN. Our results underline the importance of proteomic analyses in advancing the understanding of DN pathogenesis and in developing strategies for personalized treatment to improve patient outcomes. Future research should focus on further elucidating these molecular mechanisms and their implications for clinical management.