Pre-implantation exogenous progesterone and pregnancy in sheep:I.polyamines,nutrient transport,and progestamedins  

作　　者：Emily C.Hoskins Katherine M.Halloran Claire Stenhouse Robyn M.Moses Kathrin A.Dunlap Michael C.Satterfield Heewon Seo Gregory A.Johnson Guoyao Wu Fuller W.Bazer 

机构地区：[1]Departments of Animal Science,Texas A&M University,College Station,TX 77843-2471,USA [2]Veterinary Integrative Biosciences,Texas A&M University,College Station,TX 77843,USA

出　　处：《Journal of Animal Science and Biotechnology》2021年第3期935-951,共17页畜牧与生物技术杂志（英文版）

基　　金：This research was supported by Agriculture and Food Research Initiative Competitive Grant no.2016-67015-24958 from the USDA National Institute of Food and Agriculture。

摘　　要：Background:Administration of exogenous progesterone(P4)to ewes during the pre-implantation period advances conceptus development and implantation.This study determined effects of exogenous P4 on transport of select nutrients and pathways that enhance conceptus development.Pregnant ewes(n=38)were treated with either 25 mg P4 in 1 mL corn oil(P4,n=18)or 1mL corn oil alone(CO,n=20)from day 1.5 through day 8 of pregnancy and hysterectomized on either day 9 or day 12 of pregnancy.Endometrial expression of genes encoding enzymes for synthesis of polyamines,transporters of glucose,arginine,and glycine,as well as progestamedins was determined by RT-qPCR.Results:On day 12 of pregnancy,conceptuses from P4-treated ewes had elongated while those from CO-treated ewes were spherical.The mRNA expression of AZIN2,an arginine decarboxylase,was lower in endometria of P4-treated than CO-treated ewes on day 9 of pregnancy.Expression of FGF10,a progestamedin,was greater in endometria of CO and P4-treated ewes on day 12 of gestation in addition to P4-treated ewes necropsied on day 9 of gestation.Treatment with P4 down-regulated endometrial expression of amino acid transporter SLC1A4 on day 12 of pregnancy.Conclusions:Results indicated that administration of exogenous P4 during the pre-implantation period advanced the expression of FGF10,which may accelerate proliferation of trophectoderm cells,but also was correlated with decreased expression of glycine and serine transporters and polyamine synthesis enzyme AZIN2.Further research with increased sample sizes may determine how differential expression affects endometrial functions and potentially embryonic loss.

关 键 词：Amino acid ENDOMETRIUM Gene expression POLYAMINE PROGESTERONE 

分 类 号：S826.3[农业科学—畜牧学]