羊乳中类胰岛素生长因子I的变化规律.pdf
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侯院林,张富新,李龙柱,等 .羊乳中类胰岛素生长因子 I 的变化规律 [J].江苏农业学报,2016,32(4):843-847.
floi:10.3969/j.issn.1000-4440.2016.04.020
羊乳中类胰岛素生长因子 I 的变化规律
侯院林, 张富新, 李龙柱, 于玲玲, 云 丹 , 雷飞燕
(陕西师范大学食品工程与营养科学学院,陕 西 西 安 710119)
摘 要 : 为研究羊乳中类胰岛素生长因子I(IGF-I)的浓度变化,并采集富含 IGF-I的羊乳原料,采用双抗体夹
心酶联免疫法测定羊乳中 IGF-I的浓度。在供试的4 种奶山羊(萨能羊、努比羊、垚山羊和关中羊)中,关中奶山羊
乳 中 IGF-I的浓度最髙,并且所有山羊乳品中 IGF-I的浓度都显著髙于牛乳中的 IGF-I浓度(P0. 05 )。奶山羊初
乳 的 IGF-I浓度变化较大,泌乳第 1 d 的羊乳中 IGF-I浓度最髙,随泌乳时间的延长,其浓度显著下降(P0.05 )。
常乳中 IGF-I浓度比较稳定,但浓度值较低。山羊日泌乳量越小,羊乳中 IGF-I浓度越大。经产奶山羊乳比初产奶
山羊乳具有更髙的IGF-I浓度,其中,第 4 胎的山羊乳中 IGF-I浓度最髙(P0. 05 )。挤奶间隔时间24 h 的山羊乳比
间 隔 12 h 的山羊乳具有更髙的 IGF-I浓度。
关 键 词 : 羊乳;类胰岛素生长因子I ; 变化规律
中 图 分 类 号 :TS252. 1 文 献 标 识 码 : A 文 章 编 号 : 1000-4440(2016)04-0843-05
V a r i a t i o n s o f i n s u lin - lik e g r o w t h f a c t o r I ( I G F -I ) in g o a t m ilk
HOU Yuan -lin , ZHANG Fu-xin , LI Long-zhu , YU Ling-ling , YUN Dan , LEI Fei-yan
( College o f Food Engineering and Nutrition Science, Shaanxi Normal University ,Xian 7 1 0 1 1 9 ,China)
Abstract :Variations of insulin-like growth factor-I (IGF-I) in goat milk were studied for the collection of goat milk
rich in IGF-I by double antibody sandw-ich enzyme-linked immunosorbent assay. The concentration of IGF-I in Guanzhong
goat milk was the highest,and IGF-I concentrations in four goat breeds were higher than that in cow milk(P0. 05). IGF-I
concentrations decreased significantly during colostrum,and stayed steady at low concentrations in its late lactation. The
concentrations of IGF-I decreased with increased daily milk yield,and were higher in multiparous goat5 s milk than that in
its primiparous goat’s milk. The fourth parity h
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