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| epigallocatechin gallate | |
|---|---|
| Name | Epigallocatechin gallate |
| Molar mass | 458.37 g/mol |
| Appearance | Pale yellow crystalline solid |
| Solubility | Soluble in water, ethanol |
epigallocatechin gallate
Epigallocatechin gallate is a polyphenolic compound classified among catechins, notable for its presence in a variety of plant-derived beverages and extracts. It has been the focus of research across pharmacology, nutrition, and toxicology, with investigations conducted by institutions such as Harvard University, National Institutes of Health, Max Planck Society, University of Cambridge, and University of Oxford. Regulatory and health organizations including World Health Organization, European Food Safety Authority, and United States Food and Drug Administration have evaluated products and claims related to it.
The molecule is a flavan-3-ol derivative with multiple hydroxyl groups, forming part of the larger class studied by researchers at American Chemical Society and Royal Society of Chemistry. Structural elucidation techniques developed at Massachusetts Institute of Technology and California Institute of Technology—notably nuclear magnetic resonance practiced at Institut Pasteur and X-ray crystallography used by teams at European Molecular Biology Laboratory—have defined its stereochemistry. Synthetic chemists at Tokyo Institute of Technology and ETH Zurich have explored derivatization pathways to modify its stability and lipophilicity. The molecular interactions underlying its reactivity have been modeled in computational studies at Stanford University and Princeton University.
It is abundant in leaves and extracts from Camellia sinensis preparations such as Matcha, Sencha, and products commercialized by firms like Lipton and Twinings. Significant concentrations are reported in teas from regions including China, Japan, India, and Sri Lanka, and subject to variation by cultivars studied at Agricultural Research Service and botanical collections at Royal Botanic Gardens, Kew. Other sources investigated by botanists at National Botanical Research Institute include certain fruits and seeds studied at United States Department of Agriculture and extracts marketed by Herbalife. Industrial processing and fermentation methods employed in facilities like those of Tata Global Beverages alter levels, as observed by food scientists at Nestlé and Kraft Foods.
Biosynthetic pathways in plants trace to the phenylpropanoid pathway characterized by enzymes researched at Max Planck Institute for Plant Breeding Research and Salk Institute for Biological Studies. Key enzymes and genes have been mapped in studies affiliated with University of California, Davis and Wageningen University, showing conversion from flavanone precursors through hydroxylation and galloylation. In humans, phase II metabolism involving glucuronidation and sulfation has been profiled by clinical pharmacologists at Mayo Clinic and Cleveland Clinic, with hepatic and intestinal microbiota contributions examined by microbiome groups at Broad Institute and Wellcome Sanger Institute.
Proposed mechanisms include antioxidant activity characterized in assays standardized by International Organization for Standardization and enzyme modulation demonstrated in research from Johns Hopkins University and University College London. Interactions with signaling pathways have been reported in work from Imperial College London and Duke University, implicating effects on kinases and transcription factors investigated at Cold Spring Harbor Laboratory and Howard Hughes Medical Institute. Cellular uptake and membrane interactions have been visualized in microscopy studies by teams at National Institutes of Health and Max Planck Institute for Biophysical Chemistry.
Clinical and preclinical investigations have been conducted by groups at National Cancer Institute, Memorial Sloan Kettering Cancer Center, University of Pennsylvania, and Karolinska Institutet assessing putative roles in metabolic, cardiovascular, and oncological contexts. Randomized trials registered with ClinicalTrials.gov and systematic reviews co-authored by researchers at Cochrane Collaboration and The Lancet have evaluated efficacy and endpoints. Drug formulation research involving nanoparticles and prodrugs has been pursued at Massachusetts General Hospital and University of Tokyo.
Hepatotoxicity signals and dose-dependent effects have been reported in safety reviews by European Food Safety Authority and case reports compiled in databases curated by World Health Organization and U.S. Pharmacopeia. Interactions with drugs metabolized by cytochrome P450 enzymes have been investigated at University of California, San Francisco and Yale School of Medicine, noting potential effects on medications studied at Johns Hopkins Hospital and Mayo Clinic. Regulatory actions and guidance from Food and Drug Administration and national health agencies reflect ongoing risk–benefit assessments by panels including experts from National Academy of Medicine.
Quantification protocols employ techniques standardized by laboratories at Agilent Technologies, Thermo Fisher Scientific, and academic groups at University of Wisconsin–Madison using high-performance liquid chromatography, mass spectrometry, and capillary electrophoresis. Method validation workflows align with guidance from International Council for Harmonisation and proficiency testing performed by European Union Reference Laboratory. Stable isotope labeling and metabolomics platforms used by teams at Scripps Research and EMBL-EBI enhance detection sensitivity and metabolite identification.
Category:Polyphenols