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Obesity-associated MRAP2 variants impair multiple MC4R-mediated signaling pathways.
Hum Mol Genet
January 2025
Department of Metabolism and Systems Science, University of Birmingham, Birmingham, B15 2TT, United Kingdom.
The melanocortin-4 receptor (MC4R) is a G protein-coupled receptor expressed at hypothalamic neurons that has an important role in appetite suppression and food intake. Mutations in MC4R are the most common cause of monogenic obesity and can affect multiple signaling pathways including Gs-cAMP, Gq, ERK1/2, β-arrestin recruitment, internalization and cell surface expression. The melanocortin-2 receptor accessory protein 2 (MRAP2), is a single-pass transmembrane protein that interacts with and regulates signaling by MC4R.
View Article and Find Full Text PDFIntegrated transcriptome and metabolome analysis of liver reveals unsynchronized growth mechanisms in blunt-snout bream (Megalobrama amblycephala).
BMC Genomics
January 2025
College of Fisheries, Huazhong Agricultural University, No.1, Shizishan street, Wuhan, 430070, Hubei, China.
Background: Megalobrama amblycephala presents unsynchronized growth, which affects its productivity and profitability. The liver is essential for substance exchange and energy metabolism, significantly influencing the growth of fish.
Results: To investigate the differential metabolites and genes governing growth, and understand the mechanism underlying their unsynchronized growth, we conducted comprehensive transcriptomic and metabolomic analyses of liver from fast-growing (FG) and slow-growing (SG) M.
Decoding the role of ghrelin and its interactions with central signaling pathways in avian appetite regulation.
Vet Res Commun
January 2025
Department of Biology, Faculty of Basic Science, Central Tehran Branch, Islamic Azad University, Tehran, Iran.
Ghrelin, a peptide hormone primarily produced in the enteroendocrine cells of the gastrointestinal tract, plays a vital role in regulating food intake, and energy balance in avian species. This review examines the complex interactions between ghrelin and the central signaling pathways associated with hunger regulation in birds. In contrast to mammals, where ghrelin typically promotes feeding behavior, its effects in birds appear more nuanced, exhibiting anorexigenic properties under certain conditions.
View Article and Find Full Text PDFProteomic and metabolomic profiling of plasma uncovers immune responses in patients with Long COVID-19.
Front Microbiol
December 2024
Key Laboratory of Digital Technology in Medical Diagnostics of Zhejiang Province, Hangzhou, China.
Long COVID is an often-debilitating condition with severe, multisystem symptoms that can persist for weeks or months and increase the risk of various diseases. Currently, there is a lack of diagnostic tools for Long COVID in clinical practice. Therefore, this study utilizes plasma proteomics and metabolomics technologies to understand the molecular profile and pathophysiological mechanisms of Long COVID, providing clinical evidence for the development of potential biomarkers.
View Article and Find Full Text PDFBiomaterials-mediated biomineralization for tumor blockade therapy.
Nanomedicine (Lond)
January 2025
Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China.
Recent advancements in tumor therapy have underscored the potential of biomaterials-mediated biomineralization for tumor blockade. By precisely regulating biomineralization and constructing nanomineralized structures at the cellular level, this therapy achieves multi-dimensional targeted inhibition of tumors. Mineralized precursor molecules are engineered to selectively recognize and bind to proteins on the tumor cell membrane, obstructing signal transduction.
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