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oai:ebyu-rdlopen.rawdatalibrary.net:ebyu/105272026-10-18T21:13:09Zopenairedrivercom_ebyu_10000col_ebyu_10001

18β-Glycyrrhetinic acid-loaded silver nanoparticles mitigate neuroinflammation and endoplasmic reticulum stress in the brain tissue of diabetic ratsParlak, Seçil NazifeYakut, SedaKara, AdemDemir, ÖzlemŞebin, Saime ÖzbekApoptosisBrainDiabetes mellitusEndoplasmic reticulum - stressGlycyrrhetinic acidNeuroinflammationOxidative stressSilver nanoparticlesactivating transcription factor 6alloxancaspase 3cyclic AMP responsive element binding proteinglutathioneinterleukin 1betaketaminemalonaldehydeprotein bcl 2reactive oxygen metabolitesilver nanoparticlesuperoxide dismutasetumor necrosis factorxylazineanimal experimentanimal modelanimal tissueantioxidant activityArticlebiochemical analysisblood samplingbrain injuryObjective(s): Diabetes mellitus (DM) causes oxidative stress, neuroinflammation, and endoplasmic reticulum (ER) dysfunction that contribute to neurodegeneration. This study investigated the effects of 18β-glycyrrhetinic acid-loaded silver nanoparticles (18β-GA-AgNPs) on brain injury in diabetic rats. Materials and Methods: Fifty-six male Wistar rats were divided into eight groups: Sham, 18β-GA, AgNPs, 18β-GA-AgNPs, DM, DM+18β-GA, DM+AgNPs, and DM+18β-GA-AgNPs. Diabetes was induced by alloxan (120 mg/kg, IP), and treatments were administered orally for 14 days. Biochemical markers (MDA, GSH, SOD), histopathology, and expression of ER stress and apoptotic proteins (ATF6, IRE1, Caspase-3, BCL-2, CREB, TNF-α, and IL-1β) were evaluated. Results: The DM group exhibited significant increases in MDA, TNF-α, IL-1β, ATF6, and Caspase-3 with reduced GSH, SOD, and BCL-2, indicating oxidative stress, inflammation, apoptosis, and ER stress. In contrast, IRE1 levels remained unchanged in DM rats but showed a slight elevation in the AgNPs group. Treatment with 18β-GA-AgNPs markedly reduced MDA, TNF-α, IL-1β, ATF6, and Caspase-3, while restoring GSH, SOD, BCL-2, and CREB expression. Histopathological analysis confirmed neuronal apoptosis and perivascular and extracellular space enlargement in DM rats, whereas 18β-GA-AgNPs substantially attenuated these changes. Overall, 18β-GA-AgNPs provided synergistic neuroprotection by suppressing oxidative stress, inflammation, and ER stress while enhancing antioxidant and anti-apoptotic defenses. Conclusion: These findings suggest that 18β-GA-AgNPs may represent a promising therapeutic strategy against diabetes-associated neurodegeneration, although further long-term, ultrastructural, and sex-inclusive studies are warranted. © 2026. This work is openly licensed via CC BY 4.0.Mashhad University of Medical Sciences2026Articlehttps://rdlopen.rawdatalibrary.net/r/ebyu/10527https://doi.org/10.22038/ijbms.2025.86986.188012008-3866enIranian Journal of Basic Medical Sciencesinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlehttps://ebyu-rdlopen.rawdatalibrary.net/tr/items/ebyu/10527