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 | 7.05b | 13.16a | 11.02a | 0.81 | < 0.001 |
| Retinaldehyde, pmol/mL | 10.51 | 13.26 | 11.71 | 1.28 | 0.348 |
| Retinol, nmol/mL | 1.14ab | 1.21a | 0.94b | 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)