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Objective: Diet-induced white adipose tissue inflammation is associated with insulin resistance and metabolic perturbations. Conversely, exercise (Exe) protects against the development of chronic inflammation and insulin resistance independent of changes in weight; however, the mechanisms remain largely unknown. We have recently shown that, through adrenergic stimulation of macrophages, exercise promotes resolution of acute peritoneal inflammation by enhancing the biosynthesis of specialized pro-resolving lipid mediators (SPMs).
View Article and Find Full Text PDFPharmacometabolomics and mass spectrometry imaging approach to reveal the neurochemical mechanisms of .
J Pharm Anal
July 2024
Key Laboratory of Mass Spectrometry Imaging and Metabolomics (National Ethnic Affairs Commission), Minzu University of China, Beijing, 100081, China.
, commonly known as Yuanzhi (YZ) in Chinese, has been shown to possess anti-insomnia properties. However, the material basis and the mechanism underlying its sedative-hypnotic effects remain unclear. Herein, we investigated the active components and neurochemical mechanism of YZ extracts using liquid chromatography tandem mass spectrometry (LC-MS/MS)-based pharmacometabolomics and mass spectrometry imaging (MSI)-based spatial resolved metabolomics.
View Article and Find Full Text PDFIntroduction: Pheochromocytomas and paragangliomas (PPGLs) typically secrete catecholamines and their metabolites (metanephrines [MN] and normetanephrine [NMN]). Catecholamines are synthesized by several enzymes: phenylalanine hydroxylase (encoded by PAH), tyrosine hydroxylase (TH), aromatic L-amino acid decarboxylase (DDC), dopamine β-hydroxylase (DBH), and phenylethanolamine N-methyltransferase (PNMT). MN/NMN secretion varies between anatomical and molecular subgroups.
View Article and Find Full Text PDFThe 3D in vitro Adrenoid cell model recapitulates the complexity of the adrenal gland.
Sci Rep
April 2024
Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50139, Florence, Italy.
The crosstalk between the chromaffin and adrenocortical cells is essential for the endocrine activity of the adrenal glands. This interaction is also likely important for tumorigenesis and progression of adrenocortical cancer and pheochromocytoma. We developed a unique in vitro 3D model of the whole adrenal gland called Adrenoid consisting in adrenocortical carcinoma H295R and pheochromocytoma MTT cell lines.
View Article and Find Full Text PDFCell-Effective Transition-State Analogue of Phenylethanolamine -Methyltransferase.
Biochemistry
August 2023
Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, United States.
Phenylethanolamine -methyltransferase (PNMT) catalyzes the -adenosyl-l-methionine (SAM)-dependent methylation of norepinephrine to form epinephrine. Epinephrine is implicated in the regulation of blood pressure, respiration, Alzheimer's disease, and post-traumatic stress disorder (PTSD). Transition-state (TS) analogues bind their target enzymes orders of magnitude more tightly than their substrates.
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