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Effects of dietary supplementation of vitamin A on the tibia quality of goslings |
Xia Xiao1,2 
, Haiming Yang1
, Xiaoli Wan1
, Zhiyue Wang1,3,*
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1College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province 225009, China
2Jiangsu Coastal Area Institute of Agricultural Science, Yancheng, Jiangsu Province 224002, China
3Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu Province 225009, China |
Correspondence:
Zhiyue Wang, Tel: +86-8651487979045, Fax: +86-51487990256, Email: dkwzy@263.net
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Received: 25 October 2023 • Revised: 25 January 2024 • Accepted: 20 March 2024 |
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| Abstract |
Objective
This study was conducted to evaluate the effect of dietary supplementation of VA on the tibial growth, calcium (Ca) and phosphorus (P) metabolism, VA and vitamin D (VD) deposition, and associated gene expression in goslings.
Methods
A total of 180 healthy, 1-day-old male goslings were randomly divided into 3 treatment groups (0, 9,000, and 15,000 IU VA/kg), with 6 replicates containing 10 goslings each. They were weighed and sampled on days 14, 28, 42, 56, and 70.
Results
No addition of VA reduced VA content in the serum and liver of goslings, and supplementation of 15,000 IU/kg VA increased VA content from day 14 (p<0.05). The trend of VA concentration in the serum and liver was in line with the relative mRNA expression of retinoic acid receptor β in the jejunal mucosa. In both no addition of VA and supplementation of 15,000 IU/kg VA reduced 25-hydroxycholecalciferol (25-OH-VD3) content in the serum and VD content in the liver (p<0.05). From day 28, no addition of VA or supplementation of 15,000 IU/kg VA had a negative effect on tibia length, strength, and Ca, P, and ash content in goslings (p<0.05). Tibia P content was lower in the supplementation of 15,000 IU/kg VA group than in the no addition of VA group (p<0.05). No addition of VA or supplementation of 15,000 IU/kg VA had the most effect on early serum parathyroid hormone (PTH) levels in goslings (p<0.05). The effect of no addition of VA on the bone gla protein (BGP) content of goslings started from day 14 (p<0.05). The relative mRNA expression of BGLAP and bone morphogenetic protein 4 (BMP4) in the liver and jejunal mucosa was decreased by either no addition of VA or supplementation of 15,000 IU/kg VA (p<0.05).
Conclusion
Both no addition of VA and supplementation of 15,000 IU/kg VA affected the mineralization process of the bone, and ultimately reduced tibial quality.
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| Keywords:
Calcium; Gosling; Phosphorus; Tibia; Vitamin A |
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