{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,23]],"date-time":"2026-02-23T20:24:45Z","timestamp":1771878285182,"version":"3.50.1"},"reference-count":51,"publisher":"Portland Press Ltd.","issue":"2","content-domain":{"domain":["portlandpress.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2005,1,15]]},"abstract":"<jats:p>FAP (familial amyloidotic polyneuropathy) is a systemic amyloid disease characterized by the formation of extracellular deposits of transthyretin. More than 80 single point mutations are associated with amyloidogenic behaviour and the onset of this fatal disease. It is believed that mutant forms of transthyretin lead to a decreased stability of the tetramer, which dissociates into monomers that are prone to unfolding and aggregation, later forming \u03b2-fibrils in amyloid deposits. This theory does not explain the formation of \u03b2-fibrils nor why they are toxic to nearby cells. Age at disease onset may vary by decades for patients with the same mutation. Moreover, non-mutated transthyretin also forms the same deposits in SSA (senile systemic amyloidosis), suggesting that mutations may only accelerate this process, but are not the determinant factor in amyloid fibril formation and cell toxicity. We propose that glycation is involved in amyloidogenesis, since amyloid fibrils present several properties common to glycated proteins. It was shown recently that glycation causes the structural transition from the folded soluble form to \u03b2-fibrils in serum albumin. We identified for the first time a methylglyoxal-derived advanced glycation end-product, argpyrimidine [N\u03b4-(5-hydroxy-4,6-dimethylpyrimidin-2-yl)-L-ornithine] in amyloid fibrils from FAP patients. Unequivocal argpyrimidine identification was achieved chromatographically by amino acid analysis using dabsyl (4-dimethylaminoazobenzene-4\u2032-sulphonyl) chloride. Argpyrimidine was found at a concentration of 162.40\u00b19.05\u00a0pmol\/mg of protein in FAP patients, and it was not detected in control subjects. The presence of argpyrimidine in amyloid deposits from FAP patients supports the view that protein glycation is an important factor in amyloid diseases.<\/jats:p>","DOI":"10.1042\/bj20040833","type":"journal-article","created":{"date-parts":[[2005,1,7]],"date-time":"2005-01-07T16:45:26Z","timestamp":1105116326000},"page":"339-345","update-policy":"https:\/\/doi.org\/10.1042\/crossmark_policy","source":"Crossref","is-referenced-by-count":91,"title":["Argpyrimidine, a methylglyoxal-derived advanced glycation end-product in familial amyloidotic polyneuropathy"],"prefix":"10.1042","volume":"385","author":[{"given":"Ricardo","family":"GOMES","sequence":"first","affiliation":[{"name":"Centro de Qu\u00edmica e Bioqu\u00edmica, Departamento de Qu\u00edmica e Bioqu\u00edmica, Faculdade de Ci\u00eancias da Universidade de Lisboa, 1749-016 Lisboa, Portugal"}]},{"given":"Marta","family":"SOUSA\u00a0SILVA","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica e Bioqu\u00edmica, Departamento de Qu\u00edmica e Bioqu\u00edmica, Faculdade de Ci\u00eancias da Universidade de Lisboa, 1749-016 Lisboa, Portugal"}]},{"given":"Alexandre","family":"QUINTAS","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica e Bioqu\u00edmica, Departamento de Qu\u00edmica e Bioqu\u00edmica, Faculdade de Ci\u00eancias da Universidade de Lisboa, 1749-016 Lisboa, Portugal"}]},{"given":"Carlos","family":"CORDEIRO","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica e Bioqu\u00edmica, Departamento de Qu\u00edmica e Bioqu\u00edmica, Faculdade de Ci\u00eancias da Universidade de Lisboa, 1749-016 Lisboa, Portugal"}]},{"given":"Ant\u00f3nio","family":"FREIRE","sequence":"additional","affiliation":[{"name":"Unidade de Transplanta\u00e7\u00e3o, Hospital de Curry Cabral, 1069-166 Lisboa, Portugal"}]},{"given":"Paulino","family":"PEREIRA","sequence":"additional","affiliation":[{"name":"Unidade de Transplanta\u00e7\u00e3o, Hospital de Curry Cabral, 1069-166 Lisboa, Portugal"}]},{"given":"Am\u00e9rico","family":"MARTINS","sequence":"additional","affiliation":[{"name":"Unidade de Transplanta\u00e7\u00e3o, Hospital de Curry Cabral, 1069-166 Lisboa, Portugal"}]},{"given":"Estela","family":"MONTEIRO","sequence":"additional","affiliation":[{"name":"Unidade de Transplanta\u00e7\u00e3o, Hospital de Curry Cabral, 1069-166 Lisboa, Portugal"}]},{"given":"Eduardo","family":"BARROSO","sequence":"additional","affiliation":[{"name":"Unidade de Transplanta\u00e7\u00e3o, Hospital de Curry Cabral, 1069-166 Lisboa, Portugal"}]},{"given":"Ana","family":"PONCES\u00a0FREIRE","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica e Bioqu\u00edmica, Departamento de Qu\u00edmica e Bioqu\u00edmica, Faculdade de Ci\u00eancias da Universidade de Lisboa, 1749-016 Lisboa, Portugal"}]}],"member":"288","published-online":{"date-parts":[[2005,1,7]]},"reference":[{"key":"2021112213114894500_B1","doi-asserted-by":"crossref","first-page":"4499","DOI":"10.1073\/pnas.75.9.4499","article-title":"Amyloid fibril protein related to prealbumin in familial amyloidotic polyneuropathy","volume":"75","author":"Costa","year":"1978","journal-title":"Proc. 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