西诺韦克斯-S（Synovex-S）和重组牛生长激素（索马武博，Somavubove）对阉公牛生长反应的影响：III. 肌肉生长和蛋白质反应

Effects of Synovex-S and recombinant bovine growth hormone (Somavubove) on growth responses of steers: III. Muscle growth and protein responses.

作者信息

Elsasser T H, Rumsey T S, Kahl S, Czerwinski S M, Moseley W M, Ono Y, Solomon M B, Harris F, Fagan J M

机构信息

Growth Biology Laboratory, Livestock and Poultry Sciences Institute, ARS-USDA, Beltsville, MD 20705-2350, USA.

出版信息

J Anim Sci. 1998 Sep;76(9):2346-53. doi: 10.2527/1998.7692346x.

DOI:10.2527/1998.7692346x

PMID:9781491

Abstract

We conducted this study to determine whether the growth responses of specific skeletal muscles in crossbred beef steers were differentially affected by treatment with recombinant bovine growth hormone (Somavubove, SbV, .1 mg/kg BW, i.m., daily), Synovex-S (200 mg progesterone + 20 mg 17-beta estradiol benzoate, SYN, ear implant), or a combination of the two. Starting body weights of steers averaged 182+/-1.8 kg. Five steers were used at this average BW to obtain data on weight and composition of individual muscles at d 0, and 20 other steers were assigned in equal numbers to control (C, no implant and placebo daily injection), SYN, SbV, and SYN + SbV treatment groups. After 56 d of treatment with placebo or growth promoters, complete rectus femoris (RF), triceps brachii (TB), supraspinatus (SS), psoas major (PM), and semitendinosus (ST) muscles were dissected, weighed, and then ground for determination of moisture, total protein, and fat. To calculate the average daily muscle wet weight, protein, and fat gains, the initial weight, protein content, and fat content of a muscle were subtracted from those obtained at slaughter and the difference divided by 56. Muscle weight was increased over C in TB and SS by SYN (P < .1); in TB by SbV (P < .09); and in RF (P < .05), TB (P < .03), and SS (P < .03) by SYN + SbV. Overall average daily wet tissue gain was increased over C by SbV + SYN (P < .05) in RF, TB, and SS. Average daily protein gain in RF and TB was increased by SYN (P < .1), SbV (P < .06), and SYN + SbV (P < .01) over that calculated for C. For RF, TB, and SS, average daily protein gain was greater (P < . 1) in SbV + SYN than that obtained with SbV or SYN alone. These data suggest that administration of growth promoters, such as somatotropin and Synovex, to cattle differentially affects growth characteristics in certain muscles and can have additive effects on protein gain when used together.

摘要

我们开展本研究以确定重组牛生长激素（索马武博，SbV，0.1毫克/千克体重，肌肉注射，每日一次）、西诺韦克斯-S（200毫克孕酮 + 20毫克苯甲酸雌二醇，SYN，耳部植入）或二者联用对杂交肉牛特定骨骼肌生长反应的影响是否存在差异。试验牛起始体重平均为182±1.8千克。选用5头平均体重的试验牛以获取第0天各肌肉重量和组成的数据，另外20头试验牛被等量分配至对照组（C，无植入物且每日注射安慰剂）、SYN组、SbV组以及SYN + SbV处理组。在用安慰剂或生长促进剂处理56天后，完整分离股直肌（RF）、肱三头肌（TB）、冈上肌（SS）、腰大肌（PM）和半腱肌（ST），称重后研磨以测定水分、总蛋白和脂肪含量。为计算肌肉平均日湿重、蛋白和脂肪增加量，用屠宰时获得的肌肉重量、蛋白含量和脂肪含量减去初始重量、蛋白含量和脂肪含量，差值除以56。SYN使TB和SS的肌肉重量相较于C组增加（P < 0.1）；SbV使TB的肌肉重量增加（P < 0.09）；SYN + SbV使RF（P < 0.05）、TB（P < 0.03）和SS（P < 0.03）的肌肉重量增加。在RF、TB和SS中，SbV + SYN使总体平均日湿组织增加量相较于C组增加（P < 0.05）。SYN（P < 0.1）、SbV（P < 0.06）和SYN + SbV（P < 0.01）使RF和TB的平均日蛋白增加量高于C组计算值。对于RF、TB和SS，SbV + SYN的平均日蛋白增加量高于单独使用SbV或SYN（P < 0.1）。这些数据表明，给牛施用生长促进剂，如生长激素和西诺韦克斯，对某些肌肉的生长特性有不同影响，联合使用时对蛋白增加有累加效应。