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EGCG AL Amyloidosis

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https://www.readbyqxmd.com/read/28031465/aggregation-of-full-length-immunoglobulin-light-chains-from-systemic-light-chain-amyloidosis-al-patients-is-remodeled-by-epigallocatechin-3-gallate
#1
Kathrin Andrich, Ute Hegenbart, Christoph Kimmich, Niraja Kedia, H Robert Bergen, Stefan Schönland, Erich Wanker, Jan Bieschke
Intervention into amyloid deposition with anti-amyloid agents like the polyphenol epigallocatechin-3-gallate (EGCG) is emerging as an experimental secondary treatment strategy in systemic light chain amyloidosis (AL). In both AL and multiple myeloma (MM), soluble immunoglobulin light chains (LC) are produced by clonal plasma cells, but only in AL do they form amyloid deposits in vivo We investigated the amyloid formation of patient-derived LC and their susceptibility to EGCG in vitro to probe commonalities and systematic differences in their assembly mechanisms...
February 10, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27815860/phase-2-trial-of-daily-oral-epigallocatechin-gallate-in-patients-with-light-chain-amyloidosis
#2
RANDOMIZED CONTROLLED TRIAL
Sohsuke Meshitsuka, Sumito Shingaki, Masatoshi Hotta, Miku Goto, Makoto Kobayashi, Yuuichi Ukawa, Yuko M Sagesaka, Yasuyo Wada, Masanori Nojima, Kenshi Suzuki
Previous studies have suggested that an increase in mitochondrial reactive oxygen species may cause organ damage in patients with light-chain (AL) amyloidosis; however, this damage can be decreased by antioxidant-agent treatment. Epigallocatechin gallate (EGCG), the major natural catechin in green tea, has potent antioxidant activity. Because EGCG has recently been reported to have a favorable toxicity profile for treating amyloidosis, we sought to examine the clinical efficacy and toxicity of EGCG in patients with AL amyloidosis...
March 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/26214579/inhibition-of-light-chain-6ajl2-r24g-amyloid-fiber-formation-associated-with-light-chain-amyloidosis
#3
Angel E Pelaez-Aguilar, Lina Rivillas-Acevedo, Leidys French-Pacheco, Gilberto Valdes-Garcia, Roberto Maya-Martinez, Nina Pastor, Carlos Amero
Light chain amyloidosis (AL) is a deadly disease characterized by the deposition of monoclonal immunoglobulin light chains as insoluble amyloid fibrils in different organs and tissues. Germ line λ VI has been closely related to this condition; moreover, the R24G mutation is present in 25% of the proteins of this germ line in AL patients. In this work, five small molecules were tested as inhibitors of the formation of amyloid fibrils from the 6aJL2-R24G protein. We have found by thioflavin T fluorescence and transmission electron microscopy that EGCG inhibits 6aJL2-R24G fibrillogenesis...
August 18, 2015: Biochemistry
https://www.readbyqxmd.com/read/20221615/effects-of-the-main-green-tea-polyphenol-epigallocatechin-3-gallate-on-cardiac-involvement-in-patients-with-al-amyloidosis
#4
Derliz Mereles, Sebastian J Buss, Stefan E Hardt, Werner Hunstein, Hugo A Katus
BACKGROUND: Amyloid light chain (AL) amyloidosis is a rare disease with poor prognosis and limited therapeutic alternatives. Recently, one clinical case with cardiac involvement, as well as a compelling evidence of green tea polyphenol, epigallocatechin-3-gallate (EGCG), inducing the formation of benign aggregation products that do not polymerize into fibrils were published. This is a report of the cardiac effects of green tea consumption in these patients. METHODS: Patients with known cardiac involvement in AL amyloidosis were examined by routine cardiovascular examinations that took place every 3-6 months...
August 2010: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
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