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Type 2 diabetes is characterized by β and α cell dysfunction. We used phasor-FLIM (Fluorescence Lifetime Imaging Microscopy) to monitor oxidative phosphorylation and glycolysis in living islet cells before and after glucose stimulation. In healthy cells, glucose enhanced oxidative phosphorylation in β cells and suppressed oxidative phosphorylation in α cells. In Type 2 diabetes, glucose increased glycolysis in β cells, and only partially suppressed oxidative phosphorylation in α cells. FLIM uncovers key perturbations in glucose induced metabolism in living islet cells and provides a sensitive tool for drug discovery in diabetes.
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http://dx.doi.org/10.1038/s42003-021-02113-1 | DOI Listing |
JCI Insight
September 2025
Division of Nephrology, Boston University Chobanian & Avedisian School of Medicine, Boston, United States of America.
Background: Active vitamin D metabolites, including 25-hydroxyvitamin D (25D) and 1,25-dihydroxyvitamin D (1,25D), have potent immunomodulatory effects that attenuate acute kidney injury (AKI) in animal models.
Methods: We conducted a phase 2, randomized, double-blind, multiple-dose, 3-arm clinical trial comparing oral calcifediol (25D), calcitriol (1,25D), and placebo among 150 critically ill adult patients at high-risk of moderate-to-severe AKI. The primary endpoint was a hierarchical composite of death, kidney replacement therapy (KRT), and kidney injury (baseline-adjusted mean change in serum creatinine), each assessed within 7 days following enrollment using a rank-based procedure.
Gen Physiol Biophys
September 2025
Pneumology Department, Zigong First People's Hospital, Zigong, China.
Chronic obstructive pulmonary disease (COPD) is characterized by airway remodeling and inflammation. Cigarette smoke extract (CSE) induces apoptosis, inflammation, and oxidative stress in COPD. Tripterygium glycosides (TG) are an active compound found in the root extracts of Tripterygium wilfordii Hook F (TWHF) that possesses anti-inflammatory and immunosuppressive effects.
View Article and Find Full Text PDFAdv Sci (Weinh)
September 2025
Department of Respiratory and Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, Hubei, 430060, China.
Obesity-associated obstructive sleep apnea (OSA) highlights the need for effective therapies. Hypothalamic endoplasmic reticulum (ER) stress contributes to leptin resistance in obesity. Although hesperidin (HE) modulates ER stress and oxidative pathways, its low bioavailability limits clinical use, its role in OSA is unknown.
View Article and Find Full Text PDFJCI Insight
September 2025
Division of Cardiovascular Medicine, Department of Medicine.
Aortic valve stenosis is a progressive and increasingly prevalent disease in older adults, with no approved pharmacologic therapies to prevent or slow its progression. Although genetic risk factors have been identified, the contribution of epigenetic regulation remains poorly understood. Here, we demonstrated that histone deacetylase 3 (HDAC3) maintains aortic valve structure by suppressing mitochondrial biogenesis and preserving extracellular matrix integrity in valvular interstitial fibroblasts.
View Article and Find Full Text PDFJ Cardiovasc Pharmacol
September 2025
Department of Cardiovascular Medicine, Liyuan Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430060, China.
Nuclear factor erythrocyte 2-associated factor 2 (Nrf2) is an important transcriptional regulator that plays a protective role in myocardial remodeling. Omaveloxolone (Omav) acts as an activator of Nrf2 and plays a protective role by decreasing oxidative stress and inflammation. The purpose of this study was to explore the role of Omav in myocardial remodeling and investigate the potential mechanism involved.
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