High nutrient intake during the early postnatal period accelerates skeletal muscle fiber growth and maturity in intrauterine growth-restricted pigs

Table 4 Effects of the level of nutrient intake on histomorphometry of psoas major muscle of intrauterine growth-restricted (IUGR) and normal birth weight (NBW) pigs

Items	ANI		HNI		SEM	P value
Items	IUGR	NBW	IUGR	NBW	SEM	BW	NI	BW × NI
CSA, mm²	156.2^a	209.1^b	176.2^a,b	344.8^c	30.7	< 0.001	< 0.001	0.003
Myofiber diameter, um	24.7	23.4	23.3	23.6	2.4	0.720	0.663	0.555
Myofiber density, mm²	2161^b	2270^b	2227^b	1463^a	338	0.083	0.054	0.027
Myofiber number, thousand	337.2^a	461.6^b	394.6^a,b	498.7^b	68.1	0.004	0.178	0.764

Data are presented as mean values with their standard errors, n = 6 in each group. Mean values within a row with different superscript letters (a, b, c) were significantly different between four groups (P < 0.05)
ANI adequate nutrient intake, HNI high nutrient intake, BW body weight, NI nutrient intake, CSA cross-sectional area

ISSN: 1865-3499