Patients with type 2 diabetes (T2D) manifest significant abnormalities in lipoprotein structure and function. The deleterious impact of oxidative and glycoxidative modifications on HDL-mediated atheroprotective, antiinflammatory, and antioxidative phenomena has been well established. However, the biological effects of modified HDL on adrenal steroidogenesis-which could reveal a pathophysiological link to the overactivity of the renin-angiotensin-aldosterone system and its adverse cardiovascular consequences often observed in T2D-are not well delineated. We studied the role of modified HDL on aldosterone release from adrenocortical carcinoma cells (NCI-H295R). In vitro modifications of native HDL were performed in the presence of glucose for glycoxidized HDL (glycoxHDL) and sodium hypochlorite for oxidized HDL. Angiotensin II (AngII)-sensitized H295R cells were treated with lipoproteins for 24 h, and supernatant was used to measure aldosterone release. Both native and modified HDL augmented the steroid release from AngII-sensitized cells, with glycoxHDL having the greatest impact. Both the modified forms of HDL induced a significant increase in scavenger receptor expression and employed protein kinase C as well as extracellular signal-regulated kinase as downstream effectors of aldosterone release. Native HDL and modified HDL required Janus kinase-2 for combating increased demand in steroidogenesis. Therefore, our data support the hypothesis that diabetes-induced modification of HDL may promote adrenocortical aldosterone secretion via different signal transduction pathways. This significant influence on multiple signaling mechanisms could be targeted for future research to implement novel therapeutic trials.
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Discov Med
January 2025
Faculty of Medicine, Institute of Anatomy, University of Belgrade, 11000 Belgrade, Serbia.
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View Article and Find Full Text PDFNeurosci Lett
January 2025
Institute of Sport Sciences and Physiotherapy, University of Tartu, Estonia.
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Department of Medicine, King's College Hospital NHS Foundation Trust, London, UK.
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Department of Emergency Medicine, University of California San Francisco, San Francisco, California, USA.
Coingestion of cardiovascular drugs with angiotensin-converting enzyme inhibitors (ACEIs) can be associated with refractory shock derangements complicated by vasopressor resistance, prompting the use of novel, unconventional, or uncommonly used agents. A young adult male presented to the emergency department (ED) 10 h after ingesting lisinopril and amlodipine. On arrival, he was hypotensive with a blood pressure of 72/39 mmHg.
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December 2024
Department of Medicine IV, LMU University Hospital, LMU Munich, Munich, Germany. Electronic address:
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