In accordance with NICE guidance , management of restless legs syndrome involves identifying and treating underlying causes, addressing lifestyle factors, and considering specific treatments if symptoms are moderate to severe and significantly impact quality of life
Figure 1 3.1 Providing the material basis for tumor proliferation Serine is catalyzed by serine hydroxymethyltransferase (SHMT) to generate 5,10-methylenetetrahydrofolate with tetrahydrofolate as the carbon carrier, providing essential one-carbon units for the biosynthesis of nucleotides, amino acids and other macromolecules, thereby participating in the regulation of cell proliferation and metabolism ( This reaction contributes to cysteine biosynthesis via the transsulfuration pathway, which is also metabolically linked to the homocysteine-methionine cycle ( de novo synthesis pathway directly replenishes metabolic substrates for rapidly proliferating tumor cells ( In colorectal cancer, phosphoserine aminotransferase 1 (PSAT1) regulates the degradation of cyclin D1 via the mTOR/p70S6K signaling axis, further promoting cell proliferation ( 3.2 Maintaining redox homeostasis in tumor cells The de novo serine synthesis pathway eliminates intracellular reactive oxygen species (ROS) in tumor cells and prevents oxidative stress-induced apoptosis by promoting the production of glutathione (GSH) and nicotinamide adenine dinucleotide phosphate (NADPH) ( Nicotinamide adenine dinucleotide (NAD + ) and its reduced form (NADH) constitute a pivotal intracellular redox couple
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Additionally, obesity itself is a known risk factor for GERD due to increased intra-abdominal pressure, so some patients may notice improvement in baseline reflux symptoms as they lose weight despite the medication's initial effects
