. 2018 May 8;96(6):2310–2319. doi: 10.1093/jas/sky142

Table 4.

Postprandial portal and arterial blood and plasma concentrations of some metabolites, oxygen, and insulin in growing pigs fed diets without or with xylose

Sampling time with respect to feeding, min
Item	Diet	0	30	60	90	120	180	240	300	360
Portal
Urea nitrogen, mmol/L	0% xylose	2.84	2.66	2.92^a	3.04^a	3.12^a	3.28^a	3.42^a	3.40^a	3.32^a
	15% xylose	2.65	2.57	2.63^b	2.73^b	2.83^b	3.00^b	3.07^b	2.90^b	3.02^b
	SEM	0.07	0.08	0.07	0.09	0.07	0.07	0.07	0.05	0.08
	P value	0.060	0.379	0.005	0.016	0.003	0.004	0.001	<0.001	0.009
Glucose, mg/dL	0% xylose	86.6	221.4^a	228.8^a	186.4^a	188.4	158.2	152.6	141.8	140.4
	15% xylose	91.7	150.2^b	159.7^b	160.7^b	160.8	154.8	147.0	136.3	136.8
	SEM	2.83	18.44	14.62	6.34	11.39	3.97	4.26	6.20	4.33
	P value	0.209	0.008	0.001	0.005	0.091	0.55	0.356	0.535	0.562
Oxygen, mL/L	0% xylose	13.0	12.8	11.5	11.4	10.6^b	11.0	11.1	10.6	11.4
	15% xylose	12.6	13.0	12.8	12.3	12.0^a	11.5	11.1	11.1	11.0
	SEM	0.42	0.44	0.46	0.42	0.42	0.42	0.42	0.45	0.42
	P value	0.443	0.808	0.051	0.139	0.022	0.394	0.940	0.422	0.499
Insulin, ng/mL	0% xylose	2.62	6.51^a	6.39	5.00	5.15	3.83	4.28	2.24	1.52
	15% xylose	1.44	4.86^b	4.42	4.26	4.63	4.86	2.63	2.53	2.80
	SEM	0.71	0.39	0.84	0.74	0.42	0.46	0.63	0.72	0.84
	P value	0.242	0.004	0.100	0.481	0.382	0.113	0.068	0.779	0.236
Carotid
Urea nitrogen, mmol/L	0% xylose	2.72^a	2.70	2.76^a	2.64	2.92^a	3.18^a	3.26^a	3.14^a	3.24^a
	15% xylose	2.53^b	2.50	2.52^b	2.58^b	2.62^b	2.83^b	2.87^b	2.93^b	2.88^b
	SEM	0.06	1.12	0.08	0.06	0.07	0.09	0.05	0.06	0.06
	P value	0.029	0.228	0.013	0.512	0.005	0.006	<0.001	0.023	<0.001
Glucose, mg/dL	0% xylose	88.8	138.2	168.8^a	141.4	139.2	118.6	116.0	116.0	115.6
	15% xylose	91.8	118.7	123.7^b	126.7	129.7	126.5	121.3	120.2	116.7
	SEM	2.40	11.6	13.19	6.12	8.84	3.60	2.94	3.27	2.71
	P value	0.373	0.237	0.018	0.092	0.966	0.125	0.204	0.371	0.782
Oxygen, mL/L	0% xylose	14.2	14.6	13.4	12.8^b	13.1	12.1	12.2	12.0	12.3
	15% xylose	13.7	14.8	14.4	13.8^a	13.6	13.0	12.5	12.6	12.1
	SEM	0.50	0.44	0.35	0.35	0.34	0.41	0.34	0.41	0.36
	P value	0.495	0.760	0.056	0.046	0.283	0.112	0.479	0.334	0.619
Insulin, ng/mL	0% xylose	2.47	4.98	4.72	3.76	3.2	1.40^b	2.01	2.58	2.02
	15% xylose	4.09	5.08	4.80	4.29	4.28	3.17^b	1.75	1.76	0.93
	SEM	1.06	0.94	0.99	0.77	1.14	0.58	0.64	0.76	0.64
	P value	0.281	0.944	0.957	0.627	0.504	0.033	0.769	0.441	0.233

Means in a column within variables with different superscripts differ (P < 0.05). Values are least square means (n = 5 for 0% xylose and n = 6 for 15% xylose) with pooled SEM.