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Cecum luminal butyrate concentration (A), IL-6 (B), and gene related with inflammation transcriptional expression such as cyclooxygenase-2 (COX-2) (C), inducible nitric oxide synthase (iNOS) (D), TNF-α (E), and claudin-2 (F) were compared. *P < 0.05, ***P < 0.001 from Mann-Whitney U test with Holm-Bonferroni correction as post hoc analysis followed by Kruskal-Wallis test. 6 wk, 6-week-old; 31 wk, 31-week-old; 74 wk, 74-week-old; 2 yr, 2-year-old.
