Vitamin A administration at birth promotes calf growth and intramuscular fat development in Angus beef cattle

Table 5 Serum retinoid concentrations and mRNA expression of genes involved in retinoid metabolism in intramuscular fat of 2 months old of calves receiving different doses of vitamin A treatments

Response	0 IU (n = 9)	150,000 IU (n = 7)	300,000 IU (n = 9)	SE	P-value
Serum retinoid content
Retinoic acid, pmol/mL	7.05^b	13.16^a	11.02^a	0.81	< 0.001
Retinaldehyde, pmol/mL	10.51	13.26	11.71	1.28	0.348
Retinol, nmol/mL	1.14^ab	1.21^a	0.94^b	0.06	0.026
mRNA abundance of enzymes (Arbitrary unit)
ADH4, relative expression	1.00	0.68	0.35	0.14	0.184
ADH5, relative expression	1.00	2.01	1.82	0.21	0.123
ALDH1A1, relative expression	1.00	1.71	1.35	0.20	0.369

^a-bMeans in the same row with different letters differ significantly (P < 0.05)

ISSN: 2049-1891