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Table 3 Effects of dietary tryptophan levels and diquat injection on the concentrations of tryptophan, large neutral amino acids (LNAA) and urea nitrogen in the plasma of the weaned piglets

From: The effect of dietary tryptophan levels on oxidative stress of liver induced by diquat in weaned piglets

Item - diquat + diquat SEM P
  Trp 0.18% Trp 0.30% Trp 0.45% Trp 0.18% Trp 0.30% Trp 0.45%   Trp diquat Trp × diquat
Tryptophan, nmol/mL 45b 50b 61a 29c 40b 44b 4 < 0.05 < 0.05 0.08
LNAA, nmol/mL 497b 411c 453bc 582a 447bc 421c 17 < 0.05 0.05 < 0.05
Tryptophan/LNAA 0.09b 0.13a 0.14a 0.05c 0.09b 0.11ab 0.01 < 0.05 < 0.05 0.67
Plasma urea nitrogen, mg/L 95.12c 60.02d 64.27d 212.50a 135.02b 142.17b 7.90 < 0.05 < 0.05 0.06
  1. +diquat, intraperitoneal injection diquat; − diquat, intraperitoneal injection of sterile 0.9% NaCl solution; Trp 0.18%, dietary tryptophan level 0.18%; Trp 0.30%, dietary tryptophan level 0.30%; Trp 0.45%, dietary tryptophan level 0.45%; LNAA, large neutral amino acids (sum of valine, methionine, isoleucine, leucine, phenylalanine, tyrosine and histidine).
  2. a, b, cMean values with unlike superscript letters were significantly different (P < 0.05).
  3. (Mean values with their pooled standard errors, n = 6).