Abstract
ABSTRACT Background: The challenge of chronic glomerulonephritis necessitates innovative strategies for preventing renal function deterioration. Acteoside (ACT), the primary bioactive compound of total glycosides of the leaves of Rehmannia (DHYZG), has been demonstrated availability and safety in reducing proteinuria, showing promising prospects in the treatment of kidney disease. This study aimed to elucidate the impact of ACT and DHYZG on glomerular structural cells and key proteins of rat glomeruli under several injury states. Methods: Employing 3-(4,5)-dimethylthiazolyl(-Z-Y1)-3,5-diphenyltetrazolium bromide (MTT) and Western blot methodologies, the investigation assessed varying concentrations of ACT and clinical concentration of DHYZG on cell viability and intracellular biomarkers. Specifically, the study explored the influence of ACT on connective tissue growth factor (CTGF), transforming growth factor-β (TGF-β), matrix metalloproteinase-2 (MMP-2), and MPP in rat mesangial cells, endothelial cells, and podocytes stimulated by lipopolysaccharide (LPS), high glucose, and interleukin-1β (IL-1β). Additionally, the impact of high glucose on angiotensin II (Ang II) expression in endothelial cells was investigated. Results: ACT and DHYZG demonstrated a protective effect on all cell types, and ACT administration shows a significant dose-dependent response. These compounds attenuated the expression of CTGF and TGF-β in LPS-stimulated mesangial cells and reduced the expression of MMP-2 and MMP-9 in all three cell types following IL-1β stimulation. Moreover, the high glucose-induced expression of Ang II in endothelial cells was mitigated. Conclusion: ACT and DHYZG exhibit a pronounced protective effect on glomerular cells, with ACT being the primary contributor to the therapeutic efficacy of DHYZG. Notably, ACT demonstrates a significant superiority over DHYZG in terms of both proliferation and cytokine expression in glomerular endothelial cells.
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