Eight hours after single, intraperitoneal injection of D,L-ethionine to rats, statistically significant increased activity of liver Golgi apparatus UDP-Gal-GlcNAc transferase calculated per g as well as per total liver in comparison with control was found. Specific activity of the enzyme was higher than normal, however not statistically significant. Yield of Golgi-rich membrane fraction was unchanged in comparison with control. Slight stimulation of liver Golgi apparatus expressed in increased area of this organelle and marginal dilatation of dictyosome cisternae and secretory vacuoles were found in morphological analysis performed in electron microscope.
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Sci Adv
January 2025
Department of Biochemistry, College of Life Science and Biotechnology, Brain Korea 21 Project, Yonsei University, Seoul 03722, Republic of Korea.
Until now, Hippo pathway-mediated nucleocytoplasmic translocation has been considered the primary mechanism by which yes-associated protein (YAP) and transcriptional co-activator with PDZ-binding motif (TAZ) transcriptional coactivators regulate cell proliferation and differentiation via transcriptional enhanced associate domain (TEAD)-mediated target gene expression. In this study, however, we found that TAZ, but not YAP, is associated with the Golgi apparatus in macrophages activated via Toll-like receptor ligands during the resolution phase of inflammation. Golgi-associated TAZ enhanced vesicle trafficking and secretion of proinflammatory cytokines in M1 macrophage independent of the Hippo pathway.
View Article and Find Full Text PDFGlucose-6-Phosphatase (G6Pase), a key enzyme in gluconeogenesis and glycogenolysis in the mammalian liver and kidney, converts glucose-6-phosphate to glucose for maintaining systemic blood glucose homeostasis during nutrient deprivation. However, its function has remained elusive in insects, which have no need for G6Pase in sugar homeostasis since they convert glucose-6-phosphate to trehalose, their main circulating sugar, via trehalose phosphate synthase (TPS1). In this study we identify an unexpected and essential requirement for G6Pase in male fertility, specifically to produce motile sperm.
View Article and Find Full Text PDFBio Protoc
December 2024
Center for Human Nutrition, University of Texas Southwestern Medical Center, Dallas, TX, USA.
Sterol regulatory element binding proteins (SREBPs) are transcription factors that reside in the endoplasmic reticulum (ER) membrane as inactive precursors. To be active, SREBPs are translocated to the Golgi where the transcriptionally active N-terminus is cleaved and released to the nucleus to regulate gene expression. Nuclear SREBP levels can be determined by immunoblot analysis; however, this method can only determine the steady-state levels of nuclear SREBPs and does not capture the actual status of activation.
View Article and Find Full Text PDFClin Biochem
January 2025
Dipartimento di Patologia Clinica, Ospedale Santa Maria Goretti, A.U.S.L. Latina, 04100 Latina, Italy.
Background: Novel circulating markers for the non-invasive staging of chronic liver disease (CLD) are in high demand. Although underutilized, extracellular matrix (ECM) components offer significant diagnostic potential. This study evaluates ECM-related markers in hepatitis C virus (HCV)-positive patients across varying fibrosis stages.
View Article and Find Full Text PDFClin Mol Hepatol
December 2024
Hepatobiliary Surgery, Department of General Surgery, Huashan Hospital, Fudan University, 12 Urumqi Road, Shanghai 200040, PR China.
Background/aims: Metabolic dysfunction-associated steatohepatitis (MASH) is a significant risk factor for gallstone formation, but mechanisms underlying MASH-related gallstone formation remain unclear. Golgi membrane protein 1 (GOLM1) participates in hepatic cholesterol metabolism and is upregulated in MASH. Here, we aimed to explore the role of GOLM1 in MASH-related gallstone formation.
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