{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T05:51:19Z","timestamp":1774590679937,"version":"3.50.1"},"reference-count":88,"publisher":"Oxford University Press (OUP)","issue":"12","license":[{"start":{"date-parts":[[2019,11,4]],"date-time":"2019-11-04T00:00:00Z","timestamp":1572825600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"funder":[{"name":"National Council of Technological and Scientific Development","award":["445322\/2014-4"],"award-info":[{"award-number":["445322\/2014-4"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2019,12,17]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>This study examined the influence of a diet enriched with free methionine (dl-Met) or methionine dipeptide (dl-MMet) on the intestinal health of Eimeria-challenged (EC) and unchallenged (UC) broilers. A non-supplemented, methionine-deficient diet (NS) was used as control. Treatments were arranged in a 2 \u00d7 3 factorial completely randomized design with eight replications. Broilers in the EC group were infected with sporulated oocysts of Eimeria spp. (E. acervulina, E. maxima, E. praecox, and E. mitis) at 14 d of age. Performance analysis, light and electron microscopy of the jejunum, analysis of genes related to apoptosis and cell proliferation in the jejunum, and blood tests were performed at 6 days post-inoculation (dpi). EC broilers had poorer performance than UC broilers, regardless of diet (P &amp;lt; 0.001). Broilers fed the dl-Met diet had greater weight gain (P = 0.004) and lower feed conversion ratio (P = 0.019) than broilers fed other diets. Jejunal sections from EC broilers fed the NS diet showed short (P = 0.001) and wide villi (P &amp;lt; 0.001) with increased crypt depth (P &amp;lt; 0.001) and reduced villus \/ crypt ratio (P = 0.001), jejunal absorptive surface area (P &amp;lt; 0.001), number of neutral goblet cells (Eimeria challenge: P = 0.048; diet P = 0.016), and mucin 2 (MUC2) gene expression (P = 0.018). EC birds fed the dl-MMet diet had higher enterocyte height (P &amp;lt; 0.001). Birds fed the dl-MMet diet had low lamina propria width (P = 0.009). UC broilers fed the dl-Met diet had the highest number of acidic goblet cells (P = 0.005), whereas EC broilers assigned the dl-MMet diet showed the highest number of intraepithelial lymphocytes (P = 0.033). Reduced expression of caspase-3 (CASP3) (P = 0.005), B-cell lymphoma 2 (BCL2) (P &amp;lt; 0.001), mechanistic target of rapamycin (MTOR) (P &amp;lt; 0.001), and ribosomal protein S6 kinase B1 (RPS6KB1) (P &amp;lt; 0.001) genes was observed in EC animals. MTOR expression levels were highest in birds fed the dl-MMet diet (P = 0.004). Plasma activities of aspartate aminotransferase (AST) was influenced by both diet (P = 0.002) and Eimeria challenge (P = 0.005), with EC broilers assigned the NS diet showing the highest levels. EC broilers fed the NS diet had higher creatine kinase (CK) activity (P = 0.049). EC broilers had lower plasma uric acid (P = 0.004) and higher serum mucoproteins level (P &amp;lt; 0.001). These results indicate that methionine dipeptide supplementation is able to mitigate the harmful intestinal effects of Eimeria spp. in broilers.<\/jats:p>","DOI":"10.1093\/jas\/skz339","type":"journal-article","created":{"date-parts":[[2019,11,3]],"date-time":"2019-11-03T14:36:02Z","timestamp":1572791762000},"page":"4746-4760","source":"Crossref","is-referenced-by-count":14,"title":["Dietary supplementation with free methionine or methionine dipeptide improves environment intestinal of broilers challenged with Eimeria spp."],"prefix":"10.1093","volume":"97","author":[{"given":"Ang\u00e9lica de Souza","family":"Khatlab","sequence":"first","affiliation":[{"name":"Animal Science Department, State University of Maring\u00e1, Maring\u00e1, Paran\u00e1, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ana Paula","family":"Del Vesco","sequence":"additional","affiliation":[{"name":"Animal Science Department, Federal University of Sergipe, S\u00e3o Crist\u00f3v\u00e3o, Sergipe, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Adhemar","family":"Rodrigues Oliveira Neto","sequence":"additional","affiliation":[{"name":"Vaccinar Nutri\u00e7\u00e3o e Sa\u00fade Animal, Belo Horizonte, Minas Gerais, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fernanda Losi Alves","family":"Almeida","sequence":"additional","affiliation":[{"name":"Departament of Morphological Sciences, State University of Maring\u00e1, Maring\u00e1, Paran\u00e1, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eliane","family":"Gasparino","sequence":"additional","affiliation":[{"name":"Animal Science Department, State University of Maring\u00e1, Maring\u00e1, Paran\u00e1, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2019,11,4]]},"reference":[{"key":"2019121704473065100_CIT0001","doi-asserted-by":"publisher","first-page":"1","DOI":"10.14411\/fp.2017.012","article-title":"Gene expression, oxidative stress and apoptotic changes in rabbit ileum experimentally infected with Eimeria intestinalis","volume":"64","author":"Abdel-Haleem","year":"2017","journal-title":"Folia Parasitol (Praha)"},{"key":"2019121704473065100_CIT0002","first-page":"238","article-title":"Hematological, biochemical and histopathological changes caused by coccidiosis in chickens","volume":"47","author":"Adamu","year":"2013","journal-title":"Kasetsart J. 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