Neonatal Phosphate Nutrition Alters in Vivo and in Vitro Satellite Cell Activity in Pigs

Nutrients

Lindsey S. Alexander¹  Brynn S. Seabolt¹  Robert P. Rhoads² 

[1] Laboratory of Developmental Nutrition, Department of Animal Science, North Carolina State University, Raleigh, NC 27695, USA;Department of Animal & Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA;

关键词: satellite cell;    phosphate;    neonatal;    pig;   

DOI  :  10.3390/nu4060436

来源: mdpi

【 摘 要 】

Satellite cell activity is necessary for postnatal skeletal muscle growth. Severe phosphate (PO₄) deficiency can alter satellite cell activity, however the role of neonatal PO₄ nutrition on satellite cell biology remains obscure. Twenty-one piglets (1 day of age, 1.8 ± 0.2 kg BW) were pair-fed liquid diets that were either PO₄ adequate (0.9% total P), supra-adequate (1.2% total P) in PO₄ requirement or deficient (0.7% total P) in PO₄ content for 12 days. Body weight was recorded daily and blood samples collected every 6 days. At day 12, pigs were orally dosed with BrdU and 12 h later, satellite cells were isolated. Satellite cells were also cultured in vitro for 7 days to determine if PO₄ nutrition alters their ability to proceed through their myogenic lineage. Dietary PO₄ deficiency resulted in reduced (P < 0.05) sera PO₄ and parathyroid hormone (PTH) concentrations, while supra-adequate dietary PO₄ improved (P < 0.05) feed conversion efficiency as compared to the PO₄ adequate group. In vivo satellite cell proliferation was reduced (P < 0.05) among the PO₄ deficient pigs, and these cells had altered in vitro expression of markers of myogenic progression. Further work to better understand early nutritional programming of satellite cells and the potential benefits of emphasizing early PO₄ nutrition for future lean growth potential is warranted.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.