Five new α-pyrones, cryptowratones A-E (1-5), and five known congeners (6-10), together with four other known compounds 11-14 were isolated from the twigs of Cryptocarya wrayi. The structures of the new compounds were elucidated on the basis of extensive spectroscopic data analysis and ECD calculations. All α-pyrones except 6 were evaluated for their stimulatory effects on glucose uptake in vitro with CHO-K1/GLUT4 cells. The positive control insulin displayed an approximate 42 ± 0.14% promotion on glucose uptake at 25 μM, compared with the CHO-K1/GLUT4 group. Compounds 1a/2a, 2, 3, and 10 showed a more significant stimulation of glucose uptake than insulin (25 μM) by 36 ± 0.08%, 27 ± 0.12%, 28 ± 0.12%, and 25 ± 0.12% at 1.5 μM, respectively. Immunofluorescence assays indicated the glucose uptake-stimulatory activity of α-pyrones might be correlated with increased GLUT4 translocation.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1016/j.fitote.2022.105144 | DOI Listing |
Physiol Rep
January 2025
Center for Translational Research in Aging and Longevity, Department of Health and Kinesiology, Texas A&M University, College Station, Texas, USA.
Sepsis leads to an acute breakdown of muscle to support increased caloric and amino acid requirements. Little is known about the role of adipose and muscle tissue breakdown and intestinal metabolism in glucose substrate supply during the acute phase of sepsis. In a translational porcine model of sepsis, we explored the across organ net fluxes of gluconeogenic substrates.
View Article and Find Full Text PDFDrug Resist Updat
December 2024
Department of General Surgery, The Affiliated Cancer Hospital of Nanjing Medical University & Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research, Nanjing, China. Electronic address:
The balance between CD8 T cells and regulatory T (Treg) cells in the tumor microenvironment (TME) plays a crucial role in the immune checkpoint inhibition (ICI) therapy in gastric carcinoma (GC). However, related factors leading to the disturbance of TME and resistance to ICI therapy remain unknown. In this study, we applied N6-methyladenosine (m6A) small RNA Epitranscriptomic Microarray and screened out 3'tRF-AlaAGC based on its highest differential expression level and lowest inter-group variance.
View Article and Find Full Text PDFSci Adv
January 2025
Institute for Diabetes, Obesity and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
Adipocyte lipolysis controls systemic energy levels and metabolic homeostasis. Lipolysis is regulated by posttranslational modifications of key lipolytic enzymes. However, less is known about the transcriptional mechanisms that regulate lipolysis.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Indian Institute of Technology, Gandhinagar, India.
Background: Diabetes is a modifiable risk factor for Alzheimer's disease, and GLUT4, an insulin-dependent transporter, plays a crucial role in insulin-resistant conditions and, consequently, in diabetes development. The study aimed to investigate the relationship between tau pathology and insulin resistance by quantifying GLUT4 expression and glucose concentration.
Method: Initially, SH-SY5Y cells underwent transfection with either a wild-type tau plasmid or a mutant tau plasmid.
Alzheimers Dement
December 2024
Department of Neurology, Mayo Clinic, Rochester, MN, USA.
Background: While disease-modifying treatments that reduce Aβ have been recently approved by the FDA, the identification of novel therapeutic targets and strategies that target underlying mechanisms to delay the AD development are still needed. Abnormal brain energy homeostasis and mitochondria dysfunction are observed early in AD. Therefore, the development of treatments to restore these defects could be beneficial.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!