共查询到18条相似文献，搜索用时 250 毫秒
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为了降低生产成本并满足消费者对低脂肪的需求,科学家开始寻求一种新的、可行的、更有效的办法来降低动物脂肪。本文对非激素手段———脂肪细胞膜蛋白抗体免疫对猪胴体品质进行的调控及抗脂肪细胞膜蛋白抗体免疫的原理、作用机制、应用效果进行了全面阐述,并指出了尚需要解决的学术性和技术性关键问题. 相似文献
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脂肪细胞膜蛋白免疫研究进展 总被引：2，自引：0，他引：2
为了降低生产成本，满足消费对肉品的更高要求，一直在探索促进动物生长和提高胴体品质新方法的学提出了一种非激素途径的免疫学方法－脂肪细胞膜抗体免疫方法，目前这一高效，安全和作用持久的方法已日益引起重视。 相似文献
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脂肪细胞膜蛋白卵黄抗体对脂肪细胞增殖与凋亡的影响 总被引：3，自引：2，他引：1
以0.1、1.0和10.0 μg/mL 3种剂量脂肪细胞膜蛋白卵黄抗体处理体外培养的3T3-L1前脂肪细胞或经其诱导分化的脂肪细胞,采用四唑盐(MTT)比色法检测3T3-L1前脂肪细胞增殖能力,以乳酸脱氢酶漏出率为指标观察脂肪细胞膜蛋白卵黄抗体对脂肪细胞的细胞毒性,用流式细胞仪、Hoechst 33258荧光染色分析脂肪细胞凋亡情况以及油红0染色法测定脂肪细胞脂肪含量.结果表明:用不同质量浓度(0.1、1.0和10.0μg/mL)的脂肪细胞膜蛋白卵黄抗体处理可抑制3T3-L1前脂肪细胞增殖,并影响脂肪细胞的脂肪合成(P<0.05),但对脂肪细胞无明显的细胞毒作用;还可见凋亡峰和典型的凋亡形态学改变,流式细胞仪检测出的脂肪细胞凋亡率分别为1.62%、2.33%和4.57%,呈浓度依赖性,与对照组(0.36%)比较,差异皆显著(P<0.01).提示:脂肪细胞膜蛋白卵黄抗体可抑制前脂肪细胞增殖,诱导脂肪细胞凋亡并影响脂肪合成. 相似文献
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山羊抗猪脂肪细胞膜蛋白抗体的制备与ELISA鉴定 总被引：7，自引：1，他引：6
猪屠宰后,迅速采取其皮下脂肪在３７℃下的膜提取液中的匀浆,于３７℃温箱中孵育３０ｍｉｎ后,用差速离心法和高速离心法提取脂肪细胞膜蛋白,并作ＳＤＳ－ＰＡＧＥ电泳分析脂肪细胞膜蛋白与其它组织细胞膜蛋白 差异。从电泳图上看出,脂肪细胞有很多特异膜蛋白,也有一些与其它组织细胞膜蛋白相似的条带。膜蛋白与佐剂充分乳化后主动免疫３只山羊,免疫后７０ｄ取因清,用ＥＬＩＳＡ检测抗体效价为１：６４００。同样,用ＥＬＩＳＡ测定抗体与其它组织细胞膜的交叉反应,结果显示：抗猪脂肪细胞膜抗体与其它组织细胞膜有交叉反应,但反应性不高。 相似文献
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将36头5周龄的断奶上海大白猪随机分成6组.对照组C1和C2、皮下免疫试验组S1和S2、腹腔免疫试验组A1和A2,每组6头猪.试验周期为11周和17周.试验组A1和A2腹腔注射5.0 ml/kg BW山羊抗猪脂肪细胞膜抗血清,试验组S1和S2皮下注射5.0 ml/kg BW山羊抗猪脂肪细胞膜抗血清,对照组C1和C2以相同剂量注射正常山羊血清.11周末和17周末屠宰结果显示:①各试验组猪板油重和背膘厚都显著低于对照组(P＜0.05);11周末,与对照组相比,试验组S1和A1中猪眼肌面积均显著升高;17周末,腹腔免疫组猪眼肌面积显著高于对照组(P＜0.05).②11周末,腹腔免疫组猪半腱肌和里脊、皮下免疫组猪背最长肌和里脊中脂肪含量均明显低于对照组(P＜0.05);17周末,与对照组相比,腹腔免疫组猪半腱肌中脂肪含量显著下降(P＜0.05).③11周末,腹腔免疫组猪背最长肌和里脊中蛋白质含量显著高于对照组(P＜0.05);17周末,各试验组背最长肌和里脊中蛋白质含量与腹腔免疫组半腱肌中蛋白质含量均显著高于对照组(P＜0.05).表明,山羊抗猪脂肪细胞膜被动免疫具有较好改善猪胴体品质和肉品质的作用. 相似文献
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对星康吉鳗（Conger myriaster）卵巢发育过程中的个体形态学和卵母细胞特征变化,以及卵巢、肝脏、肌肉中营养成分的变化情况进行研究。结果表明：星康吉鳗卵巢发育分为5个时期,即卵母细胞单层滤泡期、卵母细胞出现脂肪泡期、卵母细胞卵黄充满期（早期、中期、末期）、卵母细胞核极化期和卵母细胞成熟期。卵母细胞直径、细胞核直径、脂肪泡直径和卵黄球直径随着卵母细胞的发育逐渐增长。卵母细胞中脂肪泡的初始发生位点在细胞核周围,并且发生时间上脂肪泡先于卵黄球,随着卵母细胞发育,脂肪泡呈环状分布并逐渐向细胞膜方向延伸;卵母细胞中卵黄球的初始发生位点在细胞膜周边的细胞质层,随着卵母细胞发育,卵黄球呈环状分布并向细胞核方向延伸。发育过程中星康吉鳗性体指数、肝体指数、眼径指数、肛长指数之间均呈正相关性;消化道指数与性体指数、肝体指数、眼径指数、肛长指数分别呈负相关性。营养成分变化表明,星康吉鳗主要储存脂肪的位置在肌肉,脂肪的转运在星康吉鳗的卵巢发育中起到了重要作用。研究结果可为星康吉鳗全人工繁殖提供参考。 相似文献
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CAO Jin-ling CHEN Jian-jie WANG Zhi-rui WANG Jun-dong 《中国农业科学(英文版)》2007,6(6):755-761
Production of monoclonal antibody against porcine adipocyte plasma membrane proteins to explore a new way of controlling body fat deposition and improving carcass quality is discussed in this article. Membrane proteins of pig adipocyte plasma membrane proteins were extracted with the help of sucrose density gradient centrifugation, and two kinds of proteins were obtained. The monoclonal antibody （designated 3B2 and 3F3） of IgG1 and IgG2b subclass against adipocyte membrane proteins were produced by immunization, with adipocyte membrane proteins as an antigen, and its titer was 1：105 detected by enzyme-linked immunoadsorbent assay （ELISA）. The cell strains were identified by analyzing the number of chromosomes, the heat stability, the acid and alkali, the types and subtypes of immnoglobulin, and its peculiarities and affinities. Through identification, the chromosome number of hybridoma cell strains was from 80 to 100 and the strains formed good hybridomas colonies. The strains＇ affinity constants were 4.63 × 10^9 and 3.75 × 10^9 （mol L^-1）-1, respectively. At the same time, the McAb secreted was stable to environmental factors, such as, temperature, acid, alkali and so on. The monoclonal antibodies had been obtained and their specificity to porcine adipocyte plasma membrane proteins had been identified. 相似文献
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The insulin receptor contains a calmodulin-binding domain 总被引：3，自引：0，他引：3
Substantial evidence suggests that calcium has a pivotal role in regulating the initial events through which insulin alters plasma membrane metabolism. Because binding of insulin to its receptor represents the initial site of insulin action in the plasma membrane, studies were undertaken to determine whether the insulin receptor is a calmodulin-binding protein. Preparations enriched in the insulin receptor and calmodulin-binding proteins were isolated from detergent-solubilized rat adipocyte membranes by chromatography with wheat germ agglutinin agarose and calmodulin-conjugated Sepharose, respectively. Substantial purification of a manganese-dependent, insulin-sensitive phosphoprotein of 95K identified as the beta subunit of the insulin receptor was accomplished. Binding and photocovalent cross-linking of iodine-125-labeled calmodulin to these affinity-purified preparations and to isolated plasma membranes, followed by immunoadsorption with insulin receptor antibodies bound to protein A Sepharose, resulted in significant purification of a binding complex of 110K to 140K. These results indicate that the adipocyte insulin receptor or a polypeptide closely associated with the receptor is a calmodulin-binding protein. 相似文献
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GAO Shi-zheng HU Hong-mei LIU Ling-yun ZHANG Xi LIU Yong-gang GE Chang-rong 《中国农业科学(英文版)》2007,6(10):1256-1261
To detect the effects of the polyclonal antibodies raised in sheep against porcine adipocyte plasma membranes on the porcine carcass composition and meat quality, 30 pigs assigned into 6 treatment groups were given intraperitoneal injections of sheep antipig adipocyte plasma membrane immunoglobulin （ASIg） or sheep nonimmune serum immunoglobulin （NSIg）. At the end of the experiment, the pigs were slaughtered at 90 kg body weight, and carcasses and meat quality were evaluated. The results showed that when pigs intraperitoneally immunized with 20 or 30 mg ASIg at 15 kg body weight, 20 mg purified ASIg twice at 15 and 60 kg body weight, or 20 mg purified ASIg at 60 kg body weight, respectively, their lean meat percentage, fat meat percentage, backfat thickness, loin eye area leaf fat weight, caul fat weight, heart weight, liver weight, and kidney weight were significantly affected. However, the kidney weight, lurrg weight, dressing percentage, and spleen weight did not remarkably change. Our results indicated that pigs intraperitoneally immunized with 20 or 30 mg ASIg at 15 kg body weight, and 20 mg ASIg twice at 15 and 60 kg body weight, have significantly different drip loss rate, cooked meat ratio, tenderness, storage loss rate, muscle fiber diameter, moisture content, dry matter content, crude protein content, and crude fat content from the control group that received 20 mg NSIg at 15 kg body weight. However, meat pH, meat color value, meat marbling score, inosinate, and myohemoglobin were not significantly affected. Our results indicated ASIg could not significantly affect the content of most muscular amino acids and intramuscular fatty acids. 相似文献
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GAO Shi-zheng LIU Ling-yun ZHAO Su-mei HU Hong-mei GE Chang-rong LIU Yong-gang ZHANG Xi 《中国农业科学(英文版)》2008,7(2):232-238
This study was to investigate the regulation of monoclonal antibodies against adipocyte membrane proteins （McAb） on lipid metabolism in pigs. Forty Landrace x Saba pigs were randomly divided into eight groups; the control group was given 10 mL saline and the treat groups were given monoclonal antibody against adipocyte-specific membrane protein with 0.1, 0.5, and 1.0 mg kg-I body weight at 15 and 60 kg body weight, respectively, by intraperitoneal injection. The results showed that McAb could increase, significantly, serum lipoprotein lipase activity and reduce serum nonesterified fatty acid （NEFA） content. Meanwhile, McAb increased content of serum lipid, triglyceride （TG）, cholesterol （CHO）, high density lipoprotein （HDL）, and low density lipoprotein （LDL） both at 15 and 60 kg body weight. However, McAb affected more significantly the lipid metabolism at 15 kg body weight than at 60 kg body weight. Moreover, this effect of McAb on lipid metabolism exhibited dose-dependent effect. These results suggested that this monoclonal antibody increased lipase activity, promoted lipolysis, and utilization of lipid so that McAb could be applied to restrain excessive fat deposition in porcine production through the regulation of fat metabolism. 相似文献
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将拟南芥CesA家族基因的高变区克隆到融合表达载体pGEX-4T-3中,构建重组质粒pGEX-AtCe-sAs,在大肠杆菌JM109中经IPTG诱导表达谷胱甘肽巯基转移酶融合蛋白(GST-AtCESAs)。采用GST亲和层析法纯化GST-AtCESAs并制备了多克隆抗体。Western-blotting检测表明,抗体Anti-CESA4和Anti-CE-SA7存在明显的交叉反应,Anti-CESA1、Anti-CESA3、Anti-CESA6、Anti-CESA2、Anti-CESA5、Anti-CESA8均能在拟南芥原生质膜上检测到特异免疫条带,这为进一步深入研究拟南芥纤维素合成机制提供了有利条件。 相似文献
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通过研究氯化钠和多聚物浓度对质膜和各种内膜在PEG/Dextran两相系统中分配行为的影响,根据其影响膜在两相系统中分配系数的试验结果,应用两相分配纯化法,纯化生长正常和受旱条件下小麦绿色组织质膜,对匀浆介质稍加修改,加入5mmol/L ZnCl_2,结果在较短的时间得到了两种小麦绿色组织细胞质膜的富集组分。 相似文献
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【目的】 研究口服型脂肪细胞膜蛋白抗体对生长肥育猪胴体品质和代谢的影响及其作用机理。【方法】 体重27 kg左右的杜×长•梅三元杂交商品猪160头，随机分成试验组和对照组。试验组基础日粮中添加75 mg•kg-1脂肪细胞膜蛋白抗体，对照组在基础日粮中添加等量阴性抗体辅料，饲喂104d后屠宰，采集血液和组织样品。用放射免疫法测定血清胰岛素（insulin）和瘦素（leptin）浓度,组织学方法测量脂肪细胞直径，分光光度法测定脂肪组织DNA、RNA浓度、脂肪组织氧化型辅酶Ⅱ-苹果酸脱氢酶（NADP-MDH）活性以及脂肪与肌肉组织中脂蛋白脂酶（LPL）活性。【结果】 试验组平均日增重及瘦肉率分别提高13.03%（P<0.01）和10.30%（P<0.01），背膘厚以及肾周脂肪、肠系膜脂肪和皮下脂肪比率分别下降24.14%（P<0.01）、27.27%（P<0.05）、20.42%（P<0.01）和29.21%（P<0.01），而肌内脂肪含量则不受影响；试验组血清insulin浓度降低26.19%（P<0.05）,leptin 浓度下降26.53%（P<0.05）；不同部位脂肪细胞的直径显著降低；脂肪组织NADP-MDH活性变化不显著；脂肪组织脂蛋白脂酶活性以及脂肪组织与肌肉组织脂蛋白脂酶活性的比值显著下降（P<0.05）。【结论】口服脂肪细胞膜蛋白抗体可显著改善猪的胴体品质；血清insulin、leptin以及组织脂蛋白脂酶活性的改变可能参与这种作用的调节。 相似文献
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A 115-kD polypeptide immunologically related to erythrocyte band 3 is present in Golgi membranes 总被引：5，自引：0，他引：5
S Kellokumpu L Neff S J?ms?-Kellokumpu R Kopito R Baron 《Science (New York, N.Y.)》1988,242(4883):1308-1311
Band 3 multigene family consists of several distinct but structurally related polypeptides which are probably involved in the transport of anions across the plasma membrane of both erythrocytes and nonerythroid cells. A novel member of this family of polypeptides that resides in the Golgi complex was identified with antibodies to Band 3. The Golgi antigen had a larger molecular size and was antigenically distinct from Band 3 in the amino-terminal domain. It was expressed most prominently in cells that secrete large amounts of sulfated proteins and proteoglycans. This polypeptide may participate in sulfate transport across Golgi membranes. 相似文献