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Elucidating the impact of S-adenosylmethionine and histamine binding on N-methyltransferase conformational dynamics: Insights from an in silico study.
J Mol Graph Model
January 2025
Tianjin Institute of Industrial Biotechnology of Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China. Electronic address:
S-adenosylmethionine (SAM)-dependent histamine N-methyltransferase (HNMT) is a crucial enzyme involved in histamine methylation, playing an important role in the epigenetic modification of biology. It entails the addition of methyl groups to histamine molecules, thereby regulating gene expression, cellular signal transduction, and other biological processes. Therefore, gaining a profound understanding of the detailed mechanism underlying HNMT-mediated methylation reactions is instrumental in elucidating the role of histamine methylation in biology.
View Article and Find Full Text PDFIntegrating Machine Learning and Pharmacophore Features for Enhanced Prediction of H1 Receptor Blockers.
Med Chem
January 2025
Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
Introduction: Histamine Type I Receptor Antagonists (H1 blockers) are widely used to mitigate histamine-induced inflammation, particularly in allergic reactions. Histamine, a biogenic amine found in endothelial cells, vascular smooth muscle, bronchial smooth muscle, and the hypothalamus, is a key player in these responses. H1 blockers are essential in cough syrups and flu medications and are divided into two generations: first-generation H1 blockers, which are sedating and have numerous side effects, and second-generation blockers, which are non-sedating and generally less toxic but may still exhibit cross-reactivity with other receptors.
View Article and Find Full Text PDFInsight into the anti-allergic impacts of fucoidan from Gracilaria lemaneiformis in mitigating allergic reactions induced by shrimp tropomyosin via regulating Th1/Th2 cytokines and T cell subsets.
Int J Biol Macromol
January 2025
State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China.
Fucoidan is a natural sulfated polysaccharide with immunoregulatory function. In this work, the anti-allergic impacts of Gracilaria lemaneiformis fucoidan (GLF) in mitigating allergic reactions induced by shrimp tropomyosin were investigated. As the results, GLF performed significant hyaluronidase inhibition ability (IC = 0.
View Article and Find Full Text PDFMurine model of cross-IgE sensitization and cross-anaphylactic reactions among multiple group food allergens.
Front Immunol
January 2025
Department of Pathology, Microbiology & Immunology, New York Medical College, Valhalla, NY, United States.
Rationale: Approximately 32 million people in the United States suffer from food allergies. Some food groups, such as legumes - peanuts, tree nuts, fish, and shellfish, have a high risk of cross-reactivity. However, the murine model of multiple food group cross-reactivity is limited.
View Article and Find Full Text PDFEvaluation of the inhibitory effect of different molecular weights chitosan on MRGPRX2-mediated mast cell degranulation and the pseudo-allergic reaction.
Immunopharmacol Immunotoxicol
January 2025
Department of Pharmacy, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China.
Objectives: Chitosan is widely used in medicine to regulate immune responses in T cells and dendritic cells. However, research on the regulation of mast cells (MCs) is scarce. Mas-related G-protein-coupled receptor X2 (MRGPRX2) is a key receptor that mediates MC activation.
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