Farmer C, Petitclerc D, Pelletier G, Gaudreau P, Brazeau P
Agriculture Canada, Lennoxville Research Station, Quebec.
Biol Neonate. 1992;61(2):110-7. doi: 10.1159/000243538.
Thirty-eight gestating sows were either immunized against somatostatin (SRIF) and/or injected with growth hormone-releasing factor (GRF). Treatment effects on carcass composition and resistance of newborn piglets to a 60-hour fast were investigated. Protein content of carcasses at birth was increased in piglets of sows receiving GRF or immunized against SRIF, however, when sows received both treatments there was a reduction in carcass protein content (p = 0.01). Other carcass components were unaltered by treatments, and none of the treatments affected metabolic or endocrine profiles of piglets at birth. Concentrations of GH, IGF-I (p less than 0.01), glucagon and cortisol (p less than 0.05) increased linearly with duration of fast, whereas glucose values decreased. Resistance to fasting was unaltered in piglets from any treatment thereby suggesting that exogenous GRF and/or SRIF immunization of sows during gestation are unlikely to improve survival of newborn piglets.
38头妊娠母猪分别接受了生长抑素（SRIF）免疫和/或注射生长激素释放因子（GRF）。研究了这些处理对仔猪胴体组成以及新生仔猪耐60小时禁食能力的影响。接受GRF或进行SRIF免疫的母猪所产仔猪出生时胴体蛋白质含量增加，然而，当母猪同时接受这两种处理时，胴体蛋白质含量降低（p = 0.01）。其他胴体成分不受处理影响，且所有处理均未影响出生时仔猪的代谢或内分泌状况。生长激素（GH）、胰岛素样生长因子-I（IGF-I，p < 0.01）、胰高血糖素和皮质醇（p < 0.05）的浓度随禁食时间呈线性增加，而葡萄糖值降低。任何处理组仔猪的耐禁食能力均未改变，这表明妊娠期母猪进行外源性GRF和/或SRIF免疫不太可能提高新生仔猪的存活率。
