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Regulation of bone phosphorus retention and bone development possibly by BMP and MAPK signaling pathways in broilers

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Journal of Integrative Agriculture 2022年第10期21卷 3017-3025页

作者： LIAO Xiu-dong CAO Su-mei LI Ting-ting SHAO Yu-xin ZHANG Li-yang LU Lin ZHANG Ri-jun HOU Shui-sheng LUO Xu-gang Mineral Nutrition Research Division State Key Laboratory of Animal NutritionInstitute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193P.R.China Poultry Mineral Nutrition Laboratory College of Animal Science and TechnologyYangzhou UniversityYangzhou 225000P.R.China Laboratory of Feed Biotechnology State Key Laboratory of Animal NutritionCollege of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193P.R.China

The bone morphogenetic protein(BMP)and mitogen-activated protein kinase(MAPK)signaling pathways play an important role in regulation of bone formation and development,however,it remains unclear that the effect of dietary different levels of non-phytate phosphorus(NPP)on these signaling pathways and their correlations with bone phosphorus(P)retention and bone development in broilers.Therefore,this experiment was conducted to investigate the effect of dietary P supplementation on BMP and MAPK signaling pathways and their correlations with bone P retention and bone development in broilers.A total of 800 one-day-old Arbor Acres male broilers were randomly allotted to 1 of 5 treatments with 8 replicates in a completely randomized design.The 5 treatments of dietary NPP levels were 0.15,0.25,0.35,0.45 and 0.55%or 0.15,0.22,0.29,0.36 and 0.43%for broilers from 1 to 21 days of age or 22 to 42 days of age,respectively.The results showed that extracellular signal-regulated kinase 1(ERK1)mRNA expression in the tibia of broilers on days 14 and 28,phosphorylated-ERK1(p-ERK1)on day 14,and BMP2 protein expression on days 28 and42 decreased linearly(Pbone mineral concentration(BMC),bone mineral density(BMD),bone breaking strength(BBS)and tibia ash were negatively correlated(r=-0.726 to-0.359,Pbone gal protein(BGP)were positively correlated(r=0.405 to 0.665,P<0.01)with ERK1 mRNA and p-ERK1.At 28 days of age,TP,BMC,BMD,BBS and tibia ash were negatively correlated(r=-0.518 to-0.370,P<0.05)with ERK1 mRNA and BMP2 protein,while tibia ALP was positively correlated(r=0.382 to 0.648,P<0.05)with them.The results indicated that TP,BMC,BMD,BBS or tibia ash had negative correlations,while tibia ALP and BGP had positive correlations with ERK1 and JNK1 mRNAs,BMP2 protein and

关键词： broiler bone development bone phosphorus retention signaling pathway

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