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Evidence suggests that amino acid (AA) restriction can be used to target the altered metabolism of cancer cells. In this work, we evaluated the therapeutic potential of selective AA restriction in colon cancer. After observing anticancer activity in vitro, we prepared several artificial diets and evaluated their anticancer activity in two challenging animal models of metastatic colon cancer. These models were established by injecting CT26.WT murine colon cancer cells in the peritoneum (peritoneal dissemination) or in the tail vein (pulmonary metastases) of immunocompetent BALB\/cAnNRj mice. Capecitabine, which is a first-line treatment for patients with metastatic colon cancer, was also evaluated in these models. Mice fed diet TC1 (a diet lacking 10 AAs) and diet TC5 (a diet with 6% casein, 5% glutamine, and 2.5% leucine) lived longer than untreated mice in both models; several mice survived the treatment. Diet TC5 was better than several cycles of capecitabine in both cancer models. Cysteine supplementation blocked the activity of diets TC1 and TC5, but cysteine restriction was not sufficient for activity. Our results indicated that artificial diets based on selective AA restriction have therapeutic potential for colon cancer.<\/jats:p>","DOI":"10.3390\/nu14163378","type":"journal-article","created":{"date-parts":[[2022,8,17]],"date-time":"2022-08-17T22:53:30Z","timestamp":1660776810000},"page":"3378","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Artificial Diets Based on Selective Amino Acid Restriction versus Capecitabine in Mice with Metastatic Colon Cancer"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2476-2507","authenticated-orcid":false,"given":"Julio Jos\u00e9","family":"Jim\u00e9nez-Alonso","sequence":"first","affiliation":[{"name":"Department of Pharmacology, Faculty of Pharmacy, University of Seville, 41012 Sevilla, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emilio","family":"Guill\u00e9n-Mancina","sequence":"additional","affiliation":[{"name":"Department of Pharmacology, Faculty of Pharmacy, University of Seville, 41012 Sevilla, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6845-797X","authenticated-orcid":false,"given":"Jos\u00e9 Manuel","family":"Calder\u00f3n-Monta\u00f1o","sequence":"additional","affiliation":[{"name":"Department of Pharmacology, Faculty of Pharmacy, University of Seville, 41012 Sevilla, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"V\u00edctor","family":"Jim\u00e9nez-Gonz\u00e1lez","sequence":"additional","affiliation":[{"name":"Department of Pharmacology, Faculty of Pharmacy, University of Seville, 41012 Sevilla, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patricia","family":"D\u00edaz-Ortega","sequence":"additional","affiliation":[{"name":"Department of Pharmacology, Faculty of Pharmacy, University of Seville, 41012 Sevilla, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6231-190X","authenticated-orcid":false,"given":"Estefan\u00eda","family":"Burgos-Mor\u00f3n","sequence":"additional","affiliation":[{"name":"Department of Pharmacology, Faculty of Pharmacy, University of Seville, 41012 Sevilla, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2794-1647","authenticated-orcid":false,"given":"Miguel","family":"L\u00f3pez-L\u00e1zaro","sequence":"additional","affiliation":[{"name":"Department of Pharmacology, Faculty of Pharmacy, University of Seville, 41012 Sevilla, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,8,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"778","DOI":"10.1002\/ijc.33588","article-title":"Cancer Statistics for the Year 2020: An Overview","volume":"149","author":"Ferlay","year":"2021","journal-title":"Int. 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