The Effects of Vitamin A Supplementation During Late-stage Pregnancy on Longissimus Dorsi Muscle Tissue Development, Birth Traits, and Growth Performance in Postnatal Korean Native Calves
Overview
Authors
Affiliations
Objective: This study investigated the effects of vitamin A (VA) supplementation during late-stage pregnancy on longissimus dorsi muscle tissue development, birth traits, and growth performance of postnatal Korean native calves.
Methods: In the preliminary experiment, twenty-six pregnant cattle (initial body weight [BW] = 319 kg (standard deviation [SD] = 30.1; 1st parity) were randomly assigned to the control and treatment groups. The treatment group received VA supplementation at 24,000 IU/d from gestational day 225 until delivery. In the main experiment, twelve pregnant cattle (initial BW = 317 kg [SD = 31.3]; 1st parity) were treated with VA supplementation at 24,000 IU/d (gestational days 150 to 225) and at 78,000 IU/d (gestational day 225 until delivery). Serum VA levels were analyzed in pregnant cattle, and the growth performance, gene expression, and serum VA levels were analyzed in the offspring.
Results: Serum VA levels in pregnant cattle decreased the late gestation in both experiments (p<0.001). In the main experiment, pregnant cattle at parturition and offspring at birth in the treatment group had higher serum VA levels than those in the control group (p<0.05). In the treatment groups, an increased birth weight was observed in the main experimental group (p = 0.022), and a tendency (p = 0.088) toward an increased birth weight was observed in the preliminary experimental group. However, no differences were observed in the feed intake, average daily gain, gain-to-feed ratio, or BW of 31-day-old calves. Gene expression was analyzed in longissimus dorsi muscles of 31-day-old calves. VA supplementation in pregnant cattle stimulated postnatal muscle development in offspring by elevating myogenic factor 5 (MYF5), MYF6, and myoblast determination levels (p<0.05). Moreover, preadipocyte-related marker genes such as extracellular signal-regulated kinase 2 and krüppel-like factor 2 were higher in the treatment group than in the control group (p<0.05).
Conclusion: VA supplementation (78,000 IU/d) in late-stage pregnant cattle maintained serum VA levels. In addition, 78,000 IU/d VA supplementation increased the birth weight and expression of genes related to muscle and preadipocyte development in offspring. Overall, 78,000 IU/d VA supplementation in pregnant cattle is beneficial to newborn calves.
Lee J, Peng D, Jin X, Smith S, Lee H J Anim Sci. 2023; 101.
PMID: 37313716 PMC: 10424720. DOI: 10.1093/jas/skad192.
Vitamin A supplementation downregulates and mRNA expression in weaned beef calves.
Jin X, Peng D, Kim S, Kim N, Nejad J, Kim D Anim Nutr. 2022; 10:372-381.
PMID: 35949197 PMC: 9356019. DOI: 10.1016/j.aninu.2022.06.007.
Performance of Hanwoo calves fed a commercial colostrum replacer versus natural bovine colostrum.
Ahmadi F, Kim S, Hwangbo D, Oh Y, Yu J, Bae J J Anim Sci Technol. 2021; 63(5):1114-1125.
PMID: 34796351 PMC: 8564311. DOI: 10.5187/jast.2021.e98.
Peng D, Smith S, Lee H J Anim Sci Biotechnol. 2021; 12(1):34.
PMID: 33663602 PMC: 7934359. DOI: 10.1186/s40104-021-00558-2.