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1.
《中国家禽》2017,(13)
试验旨在研究繁殖期鸽嗉囊组织形态学及生长因子含量动态变化规律。选取52对白羽王鸽肉种鸽(60周龄,公母配对),于孵化期第2(I2)、4(I4)、6(I6)、10(I10)、14(I14)、17(I17)天和哺育期第1(R1)、4(R4)、7(R7)、10(R10)、15(R15)、20(R20)、25(R25)天取嗉囊组织进行测定(每个时间点雌、雄鸽各4只)。嗉囊组织形态、胰岛素样生长因子-1(IGF-1)及表皮生长因子(EGF)检测结果:繁殖期,雌雄鸽嗉囊上皮厚度与嗉囊IGF-1及EGF含量呈正相关,三者均于R1时期存在最大值;雌雄鸽嗉囊内壁相邻褶皱距离均于R1时期减少至最小值;与I2时期相比,R1时期雌雄鸽嗉囊上皮嗜酸性细胞形态增大,形状为粗糙的多边形。雌鸽嗉囊上皮厚度、嗉囊内壁相邻褶皱距离、嗉囊IGF-1和EGF浓度分别于R1、R10、I14和I17时期显著大于雄鸽。试验表明,繁殖期种鸽嗉囊生长因子可能参与调控嗉囊形态学变化过程,且存在性别差异。 相似文献
2.
《中兽医医药杂志》2020,(3)
观察古方剂八珍汤对疲劳小鼠血清乳酸脱氢酶、血尿素氮、肝脏和肾脏ATP酶含量的影响,探讨其抗疲劳的作用机制。将SPF级雄性小鼠50只,随机分为空白组、模型组、八珍汤低剂量组、八珍汤中剂量组、八珍汤高剂量组。除空白对照组外,其余4组小鼠采用力竭游泳制备疲劳模型,八珍汤给药组给予不同剂量相应八珍汤0.2 mL/(10 g·d)灌胃,15 d后各组小鼠检测血清乳酸(LD)、乳酸脱氢酶(LDH)、血尿素氮(BUN)含量、肝脏ATP酶、肾脏ATP酶含量,并进行比较。结果发现,与模型组比较,八珍汤高剂量组小鼠血清中乳酸脱氢酶显著升高(P0.05);八珍汤低剂量组、中剂量组和高剂量组小鼠的血清血尿素氮明显降低;八珍汤中剂量组小鼠肝脏中Ca~(2+)-Mg~(2+)-ATP酶含量显著升高(P0.05),八珍汤中剂量组小鼠肝脏中Mg~(2+)-ATP酶、Ca~(2+)-Mg~(2+)-ATP酶含量均显著升高(P0.05,P0.01);八珍汤中剂量组和高剂量组小鼠肾脏Mg~(2+)-ATP酶、Ca~(2+)-Mg~(2+)-ATP酶、Na~+-K~+-ATP酶含量均显著升高。说明八珍汤通过提高疲劳小鼠血清乳酸脱氢酶、肝脏ATP酶和肾脏ATP酶的水平而发挥抗疲劳作用。 相似文献
3.
本试验旨在研究脱氧雪腐镰刀菌烯醇(DON)与玉米赤霉烯酮与(ZEA)联合暴露对体外培养鸡脾脏淋巴细胞内环境稳态的影响。分别以0.012 50μg/mL DON+0.006 25μg/mL ZEA、0.050μg/mL DON+0.025μg/mL ZEA、0.2μg/mL DON+0.1μg/mL ZEA、0.8μg/mL DON+0.4μg/mL ZEA对体外培养鸡脾脏淋巴细胞进行联合暴露培养,48 h后测定细胞膜ATP酶(Ca~(2+)-ATP酶、Na~+/K~+-ATP酶)活性以及细胞内pH、Ca~(2+)水平和钙调蛋白(CaM)的mRNA表达水平。同时设不添加毒素的空白对照组。结果表明:添加毒素的各试验组间,细胞内Ca~(2+)水平、CaM mRNA表达水平随毒素浓度的升高而增加,且添加毒素的各试验组均显著或极显著高于空白对照组(P0.05或P0.01)。细胞内pH以及细胞膜Ca~(2+)-ATP酶与Na~+/K~+-ATP酶活性均随毒素浓度的升高而降低,且添加毒素的各试验组均显著或极显著低于空白对照组(P0.05或P0.01)。由此得出,DON、ZEA联合暴露导致体外培养鸡脾脏淋巴细胞内酸化、离子平衡失调等一系列细胞内环境稳态失衡,且呈剂量依赖性。 相似文献
4.
《畜牧与兽医》2016,(6):97-99
通过检测鹿复合麻醉剂作用下大鼠小脑及海马突触体Ca~(2+)-Mg_(2+)-ATP酶活性的变化,探讨其麻醉与该脑区突触体Ca~(2+)-Mg_(2+)-ATP酶相关性。32只纯种SD大鼠随机分为对照组、诱导组、麻醉组和催醒组,利用比色法测定Ca~(2+)-Mg_(2+)-ATP酶活性。结果显示,药物作用后大鼠小脑及海马脑区突触体Ca~(2+)-ATP酶活性显著低于对照组(P0.01或P0.05);小脑脑区突触体Mg_(2+)-ATP酶活性降低,与对照组比较显著降低(P0.01或P0.05)。结果提示,鹿复合麻醉剂抑制了大鼠小脑、海马脑区突触体Ca~(2+)-ATP酶活性及小脑脑区突触体Mg_(2+)-ATP酶活性。 相似文献
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《甘肃畜牧兽医》2021,51(4)
目的:研究当归对血虚证大鼠Na~+-K~+-ATP酶和Ca~(2+)-Mg~(2+)-ATP酶的影响。采用化学药物乙酰苯肼和环磷酰胺联合造模的方法,建立大鼠血虚模型,通过血常规、生化指标分析,初步探讨当归不同剂量对大鼠Na~+-K~+-ATP酶和Ca~(2+)-Mg~(2+)-ATP酶的影响。方法:将SD大鼠随机分为正常对照组、血虚模型组和当归水煎液高、中、低剂量组。灌胃给药并进行血常规等相关指标检测,主要包括外周血红细胞(RBC)、白细胞(WBC)、血红蛋白(HGB)、红细胞膜ATP酶活性。结果:随着给药天数的增加,模型组大鼠行动慢、眼睛无光。正常对照组和给药组大鼠活动大体相当。当归不同剂量组大鼠红细胞、白细胞、血红蛋白与模型组比较显著性升高(p0.05);与正常对照组相比模型组大鼠红细胞Na~+-K~+-ATP酶活力和Ca~(2+)-Mg~(2+)-ATP酶活力均明显降低(p0.05),当归不同剂量组红细胞膜Na~+-K~+-ATP酶活力和Ca~(2+)-Mg~(2+)-ATP酶活力均明显高于模型组和正常对照组(p0.05)。结论:当归可以有效改善乙酰苯肼和环磷酰胺联合造成的大鼠血虚证。 相似文献
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7.
《中国家禽》2017,(1)
试验旨在研究白羽王鸽种鸽哺育前体重对哺育期减重和乳鸽生长性能的影响。采用单因子试验设计,选用120对健康种鸽,按哺育前体重由大到小分为A、B、C和D四个处理组,每组6个重复,每重复5对种鸽。采用"2+4"生产模式,饲喂全价颗粒饲料,预饲10 d,试验期20 d。结果显示:试验第1~10天,A组母鸽减重显著高于D组(P0.05),母鸽哺育前体重越大,减重越多;试验第11~20天,不同体重公鸽减重、母鸽减重和公母鸽总减重均差异不显著(P0.05);试验第1~20天,A组公鸽减重显著低于B组公鸽(P0.05),A、C组母鸽减重显著高于D组(P0.05),B组公母鸽总减重显著高于D组(P0.05)。白羽王鸽种鸽体重对乳鸽5、10、15和20 d末重均无显著影响(P0.05),从数值上看以B组种鸽哺乳效果最好。公、母鸽初始体重与乳鸽5、10、15、20 d末重均无显著相关性(P0.05),公、母鸽减重与乳鸽平均日增重无显著相关性(P0.05)。综上所述,母鸽哺育前体重能影响母鸽哺育期减重,哺育前种鸽体重对公鸽减重和乳鸽生长性能影响不大。 相似文献
8.
爆炸伤经海水浸泡动物模型的建立及伤口组织生化指标变化 总被引：1，自引：0，他引：1
以小型点暴源固定于大鼠的臀部,直流电源引爆,伤后将大鼠随机分为海水浸泡组和单纯爆炸伤组.将浸泡组大鼠置于人工配制的海水中30 min,于伤前及伤后1、3、7、10 d各处死10只大鼠,对伤口及周围组织进行取材,测定超氧化物歧化酶(SOD)活力、丙二醛(MDA)含量、Na+-K+-ATP酶活力和Ca2+-Mg2+-ATP酶活力.单纯爆炸伤组除不浸泡海水外,处理同海水浸泡组.超氧化物歧化酶(SOD)活力,与创前相比,单纯爆炸伤组与创后1、3d活力降低(P<0.01),海水浸泡组在创后7 d活力降低(P<0.05).组间比较无差异.丙二醛(MDA)含量,与创前相比,单纯爆炸伤组创后1 d含量下降(P<0.01),但创后10 d升高(P<0.01).组间比较,海水浸泡组各时间点的含量均减少(P<0.05,P<0.01).与创前比较,海水浸泡组Na+-K+-ATP酶活力,在创后1 d升高(P<0.05),组间比较也升高(P<0.05).其他时间点组间比较无差异.与创前比较,单纯爆炸伤组创Ca2+-Mg2+-ATP酶活力创伤后1 d含量下降(P<0.01),但创后10 d显著升高(P<0.01);而海水浸泡组则在1、3、7、10 d时酶活力显著降低(P<0.01).组间比较,海水浸泡组在各时间点酶活力均显著降低(P<0.01).当爆炸伤仅伤及肌组织并经海水浸泡时,初期(1 d内)组织酶活性变化大,中期(3～10 d)有一定的变化,10 d以后趋于正常. 相似文献
9.
本试验利用糙皮侧耳(Pleurotus ostreatus)615菌株固体发酵小麦秸秆,旨在研究糙皮侧耳615菌株对小麦秸秆木质纤维素的降解效果。液体培养糙皮侧耳615菌株并测定1~10 d产漆酶、锰过氧化物酶活力变化;随后利用糙皮侧耳615菌株种子液固体发酵经1.00%Ca O处理的小麦秸秆,25℃发酵30 d,测定小麦秸秆中性洗涤纤维、酸性洗涤纤维、纤维素、半纤维素、木质素以及粗蛋白质含量变化;最后对发酵后的小麦秸秆进行电镜扫描,观察其结构变化。结果表明:(1)漆酶活力从第1天至第4天不断上升,并在第4天达到最大值1428.00 U/L,从第5天开始下降,且在第10天下降到399.00 U/L;锰过氧化物酶活力从第1天至第5天不断上升,并在第5天达到最大值15.45 U/L,从第6天开始下降,且在第10天下降到4.74 U/L。(2)小麦秸秆经糙皮侧耳615菌株发酵后中性洗涤纤维含量显著降低(P0.05),且比对照组降低了4.23%,酸性洗涤纤维的含量显著升高(P0.05),且比对照组升高了4.19%;纤维素含量极显著高于对照组(P0.01),且比对照组高了37.17%,半纤维素、木质素的含量显著降低(P0.01),分别比对照组降低了19.87%、43.75%;同时,粗蛋白质的含量显著提高(P0.01),比对照组提高了4.14%。(3)扫描电镜结果显示,小麦秸秆经糙皮侧耳615菌株发酵后,其粗纤维可被有效降解。液体培养糙皮侧耳615菌株在第4天、第5天产漆酶、锰过氧化物酶能力较强;小麦秸秆经糙皮侧耳615菌株固体发酵30 d后,小麦秸秆中的木质素含量、半纤维素含量均显著降低,粗蛋白质含量显著升高。 相似文献
10.
《动物营养学报》2016,(11)
本试验旨在研究不同饲粮粗蛋白质水平对猪胃肠道钙敏感受体(Ca SR)基因表达、胃肠激素分泌及胃功能性酶(H+-K+-ATP酶、胃蛋白酶)活性的影响,探讨小肠Ca SR基因表达量与血清胃肠激素浓度以及胃Ca SR基因表达量与H+-K+-ATP酶和胃蛋白酶活性的关系。选择35日龄、初始体重为(9.57±0.64)kg的"杜×长×大"杂交断奶仔猪18头,随机分为3组,分别为NP组(NRC标准粗蛋白质水平组)、MP组(较标准蛋白质水平组降低3%粗蛋白质水平)和LP组(较标准粗蛋白质水平组降低6%粗蛋白质水平),每组6个重复,每个重复1头仔猪。根据猪不同生长阶段的营养需要,分别于仔猪阶段(35~80日龄)饲喂粗蛋白质水平为20%(NP组)、17%(MP组)和14%(LP组)的饲粮,生长猪阶段(81~110日龄)饲喂粗蛋白质水平为18%(NP组)、15%(MP组)和12%(LP组)的饲粮,肥育猪阶段(111~160日龄)饲喂粗蛋白质水平为16%(NP组)、13%(MP组)和10%(LP组)的饲粮,平衡饲粮的赖氨酸(Lys)、蛋氨酸(Met)、苏氨酸(Thr)和色氨酸(Trp)水平,试验期125 d。试验结束后采集前腔静脉血液,屠宰全部试验猪后取胃食糜、胃、十二指肠、空肠和回肠组织及黏膜,测定血清胃肠激素浓度、胃食糜中胃蛋白酶和胃黏膜中H+-K+-ATP酶活性以及胃肠道各段组织中Ca SR基因表达量。结果表明:1)LP组猪胃Ca SR基因表达量显著高于NP和MP组(P0.05),MP和LP组十二指肠及空肠Ca SR基因表达量均显著低于NP组(P0.05),而各组回肠Ca SR基因表达量无显著差异(P0.05)。2)与NP组相比,MP和LP组猪血清酪酪肽(PYY)和葡萄糖促胰岛素肽(GIP)浓度显著降低(P0.05),MP组血清胆囊收缩素(CCK)浓度显著升高(P0.05),LP组胃黏膜中H+-K+-ATP酶与胃食糜中胃蛋白酶活性显著升高(P0.05)。3)胃Ca SR基因表达量与胃黏膜中H+-K+-ATP酶和胃食糜中胃蛋白酶活性均呈显著正相关(P0.05);十二指肠Ca SR基因表达量与血清GIP浓度呈显著正相关(P0.05),与血清PYY浓度呈显著正相关趋势(0.05≤P0.10);空肠Ca SR基因表达量与血清GIP和PYY浓度均呈显著正相关(P0.05);回肠Ca SR基因表达量与血清PYY浓度呈显著正相关趋势(0.05≤P0.10)。综上所述,饲粮粗蛋白质水平降低影响猪胃肠道Ca SR基因的表达,从而影响胃功能性酶活性及胃肠激素分泌。 相似文献
11.
为建立新西兰兔前体脂肪细胞的体外培养模型,比较新西兰兔肌内和皮下前体脂肪细胞分化过程中相关基因的差异表达,实验采集 1 日龄新西兰兔背最长肌和皮下脂肪组织,采用胶原酶消化方法,分别从 2 种组织中分离前体脂肪细胞,进行细胞原代培养,绘制细胞生长曲线,并对肌内和皮下前体脂肪细胞诱导分化,利用 RT-PCR 检测相关基因的表达变化。结果表明:细胞在分离后 2 h 已经贴壁,24 h 时呈现出短梭形的细胞形态,第 2 天细胞变成长梭形,第 3 天进入对数生长期。肌内和皮下前体脂肪细胞在诱导分化后均被油红O 染色,皮下前体脂肪细胞的脂质积累在诱导分化的第 2 天显著高于肌内前体脂肪细胞(P<0.05);荧光定量结果表明,肌内和皮下前体脂肪细胞 CCAAT 增强子结合蛋白(C/EBPα)基因的表达趋势在诱导分化过程中相同,肌内前体脂肪细胞过氧化物酶体增殖激活受体(PPARγ)第 4 天的表达量显著高于第 6 天,而皮下前体脂肪细胞 PPARγ表达量差异不显著;肌内前体脂肪细胞脂蛋白脂肪酶(LPL)表达量在第 0天和第 2天差异不显著,而皮下前体脂肪细胞第 2 天显著高于第 0 天(P<0.05);肌内前体脂肪细胞脂肪酸合酶(FAS)基因第 0、2、4 天的表达量差异不显著,而皮下前体脂肪细胞第 2、4 天显著高于第 0 天(P<0.05)。本研究成功构建了新西兰兔肌内和皮下前体脂肪细胞的体外培养和诱导分化模型,并发现皮下前体脂肪细胞分化早于肌内前体脂肪细胞,为进一步研究新西兰兔前体脂肪细胞的分化机制和脂肪沉积奠定基础。 相似文献
12.
The activities of GOT, GPT, LDH, gamma-glutamyltranspeptidase (gamma-GTP), alkaline phosphatase (AP), glutamate dehydrogenase (GLDH) and the concentrations of bilirubin in blood plasma after a single intraruminal application of aflatoxins were studied in four dairy cows. The maximum changes in the activities of the enzymes and the maximum bilirubin concentration in plasma were obtained in the first two to three days following the application of aflatoxins. The statistically significant increase of GOT activity, compared with activity before the application of aflatoxins, persisted until the 23rd day; in the case of LDH and GLDH the increase persisted until the 38th day from the application of aflatoxins. The activities of gamma-GTP and AP were slightly higher even on the 50th day. The increased concentration of bilirubin in plasma lasted until the 23rd day from aflatoxin application. The increased activities of enzymes testify to an impaired function of the liver, which is also proved by the specific enzymes GLDH, gamma-GTP, by increased bilirubin levels, and by histological changes known from literature. The evaluation of enzymatic activities and bilirubin concentration in plasma can make a valuable contribution to correct diagnosis of aflatoxicoses in cattle. 相似文献
13.
本试验旨在研究不同培养方法对山羊瘤胃上皮细胞生长及角蛋白18(CK18)表达量的影响。采集42日龄山羊的瘤胃上皮组织,分别采用酶消化法和组织块法对其进行体外培养。通过光学显微镜观察原代培养和传代培养阶段的细胞形态,检测第5代山羊瘤胃上皮细胞的生长曲线,并采用细胞免疫荧光法对山羊瘤胃上皮细胞进行鉴定。结果显示:1)经0.25%胰蛋白酶+0.02%乙二胺四乙酸消化获得的原代培养山羊瘤胃上皮细胞于2 d开始贴壁生长,5 d细胞开始明显增多,10 d细胞数量达到最大。2)经组织块法获得的原代培养山羊瘤胃上皮细胞于4 d开始"爬出"组织块,8 d细胞开始明显增多,14 d细胞数量达到最大。3)经免疫荧光染色显示2种方法获得的细胞胞浆内CK18均呈阳性表达且细胞纯度后者明显高于前者。4)组织块法获得的细胞CK18表达量显著高于酶消化法(P0.05)。综合得出,与酶消化法相比,应用组织块法可成功获得纯度更高的山羊瘤胃上皮细胞。 相似文献
14.
为探讨丙二醛(MDA)和超氧化物歧化酶(SOD)在雏鸡马立克病(MD)发病过程中的作用,研究了雏鸡在人工攻毒后血浆MDA含量与SOD活性的动态变化.结果表明,攻毒组接种马立克病病毒(MDV)后第14天,血浆中MDA的含量显著高于对照组(P＜0.05),第7天和第28天高于对照组,第56天时基本接近;血浆中SOD活性在第7天时对照组显著高于攻毒组(P＜0.05),第14天和第28天高于攻毒组,但差异不显著.表明雏鸡在感染MDV后血浆中MDA含量显著升高,SOD活性明显降低,对雏鸡MD的发病诊断有重要的指导作用. 相似文献
15.
Changes in hepatic glucose and lipid metabolism‐related parameters in domestic pigeon (Columba livia) during incubation and chick rearing 
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下载免费PDF全文 X. P. Wan P. Xie Z. Bu X. T. Zou 《Journal of animal physiology and animal nutrition》2018,102(2):e558-e568
This study aimed to evaluate the hepatic glucose and lipid metabolism‐related parameters of adult male and female White King pigeons (Columba livia) during incubation and chick rearing. At day 4 (I4), 10 (I10) and 17 (I17) of incubation and day 1 (R1), 7 (R7), 15 (R15) and 25 (R25) of chick rearing, livers were sampled from six pigeons for each sex. Glycogen and fat contents, activities of glycolytic enzymes (hexokinase, HK; 6‐phosphofructokinase, 6‐PFK), and genes expressions of key enzymes involved in glycolysis (pyruvate kinase, PK; glucokinase, GK), gluconeogenesis (phosphoenolpyruvate carboxykinase cytosolic, PCK1; fructose‐1,6‐bisphosphatase, FBP1; glucose‐6‐phosphatase, G6Pase), fatty acid synthesis (fatty acid synthase, FAS; acetyl‐CoA carboxylase, ACC) and fatty acid β‐oxidation (carnitine palmitoyltransferase 1, CPT1; acyl‐CoA 1, ACO) were measured. In male and female pigeon livers, glycogen content and HK activity dramatically increased after I17 and after R1, respectively; expressions of FBP1 and G6Pase genes were maximized at R15; activity of 6‐PFK and expressions of PK and CPT1 genes were highest at R7; fat content and expressions of FAS and ACC genes steeply increased from I10 to R1. In females, hepatic expressions of GK and PCK1 genes were greatest at R7 and I17, respectively; however, in males, both of them were maximized at R15. Hepatic expression of ACO gene was significantly enhanced at R1 compared to I17 and R7 in males, whereas it was notably up‐regulated at I17 and R7 in females. Furthermore, expressions of PCK1, GK, FAS and ACC genes were in significant relation to fat content in the livers of female pigeons, while fat content in male pigeons was highly correlated with expression of PCK1, ACC, CPT1 and ACO genes. In conclusion, regulations of glucose and lipid metabolic processes were enhanced in parent pigeon livers from terminal phases of incubation to mid phase of chick rearing with sexual effects. 相似文献
16.
Gildas Tetaping Mbemya Naiza Arcngela Ribeiro de S Denise Damasceno Guerreiro Francisca Geovania Canafístula de Sousa Sylvain Njina Nguedia Benner Geraldo Alves Francielli Weber Santos Otília Deusdênia Loiola Pessoa Pierre Comizzoli Jos Ricardo Figueiredo Ana Paula Ribeiro Rodrigues 《Reproduction in domestic animals》2019,54(8):1121-1130
The objective of this study was to determine whether preantral follicles cultured in vitro for 7 days within ovine ovarian cortical strips could be isolated at the secondary follicles (SF) and grown until antral stage during an additional 6 days period of in vitro culture in the presence of aqueous extract of Justicia insularis. Fresh ovarian fragments from 16 adult sheep were fixed for histological analysis (Control 1) or in vitro cultured individually in α‐MEM+ supplemented with 0.3 mg/ml J. insularis (Step 1) for 7 days. Part of the fragments then were fixed for histological analysis (in vitro culture group). Remaining fragments were exposed stepwise to increasing trehalose concentrations before immediate isolation of SF and viability assessment (Control 2) or after 6 days of culture in α‐MEM++ supplemented with 0.3 mg/ml J. insularis (Step 2). In Step 1, percentage of follicular activation was 80%. In Step 2, a significant increase (p < 0.05) in follicular diameter and antrum formation within 6 days in vitro culture of isolated follicles was achieved. The total antioxidant capacity from both steps significantly increase (p < 0.05) from day 2 to day 6. Confocal analysis of oocytes showed 57.14% oocytes with homogeneous distribution and 42.86% with peri‐cortical distribution. In conclusion, SF can be successfully isolated from sheep ovarian cortex after 7 days of culture and are capable of surviving and forming an antral cavity if cultured in vitro for an additional 6 days in the presence of 0.3 mg/ml J. insularis. 相似文献
17.
铜缺乏对奶牛红细胞及组织细胞膜ATP酶活性的影响 总被引：6，自引：0，他引：6
为探讨铜缺乏对奶牛红细胞及组织细胞膜ATP活性的影响，在调查铜缺乏奶牛水土食物链微量元素状态的基础上，首次测度了病区6头发病犊奶牛（Ⅱ组）及该地区20头同年生临床健康奶牛（IH组，血清铜低于0.56mg/kg）红细胞膜Na^ -K^ -ATP酶、Ca^2 -ATP酶及Mg^2 -ATP酶的活性，对20头IH组奶牛进行为期80d的补铜试验（含铜40mg/kg干饲料），以20头健区同年生健康奶犊牛作为对照（HH组，全血铜大于０.85mg/L）。同时测试了剖杀后６头病牛及健康牛组织细胞膜ＡＴＰ酶的活性。结果表明：Ⅱ组奶牛红细胞膜ＡＴＰ酶活性显著低于ＨＨ组及ＩＨ组。补铜后４０d，ＩＨ组奶牛红细胞膜Na^ -K^ -ATP酶均显著升高，病牛肝、脾、肾、大脑、小脑、淋巴结等组织细胞膜Na^ -K^ -ATP酶、Ca^2 -ATP酶活性显著低于对照组。结论：铜缺乏较为严重地影响了奶牛红细胞及组织膜ＡＴＰ酶的活性，抑制了这些组织的正常生理功能。 相似文献
18.
The first day after birth, 22 conventional piglets were experimentally infected with the oocysts of the coccidia of I. suis (infection dose 200,000 oocysts). The activity of 5-nucleotidase (5-ribonucleotide phosphohydrolase, EC.3.1.3.5) and phosphoglucomutase (alpha-D-glucoso-1-phosphate phosphotransferase, EC.5.4.2.2) was densitometrically assessed in the mucosa of the small intestines of these piglets. Enzyme activities were studied in the infected piglets during the 2nd to 10th day after infection. The same histochemical examination was simultaneously performed in the intestinal mucosa of five control conventional piglets at an age of 2-14 days. 5-nucleotidase and phosphoglucomutase were found to have a high density in the mucosa of the small intestine of the control piglets: the high-density locations of these enzymes include, first of all, the supranuclear area of the absorption cells, the microvillous zone of enterocytes and the smooth muscle elements of lamina muscularis mucosae. The experimentally infected piglets showed a marked decline of the density of both enzymes during the infection. The deficit affected, for a transient period, the microvillous zone and the supranuclear region of enterocytes; the musculature of the mucous layer was affected permanently. The inactivity was more protracted in the case phosphoglutamase (especially 5 to 9 days after infection). The density of 5-nucleotidase showed a partial return to the normal already the 7th day after infection, with an interruption of resumption of activity on the 10th day. Resumption of enzyme activity in the lamina muscularis mucosae was not recorded during the infection. In the three locations under study, the density of none of the enzymes did reach parameters comparable with the controls at the end of the trial (10 days after infection). 相似文献
19.
桑离体再生过程中内源激素变化的研究 总被引：4，自引：0，他引：4
植物离体器官发生是一个受多种因素调节的过程。实验结果表明 :桑子叶在培养 16d内 ,脱落酸 (ABA)随培养时间的增加而浓度增大 ,吲哚乙酸 (IAA)在培养的第 6天和第 16天出现 2个峰 ,异戊烯基腺苷 (iPAs)在培养的第 6天出现高峰 ,之后随培养时间增长而降低 ;二氢玉米素核苷 (DHZRs)和玉米素核苷 (ZRs)在培养第 8天出现浓度峰 ,之后降低。内源激素的变化与桑离体器官的发生之间显示出密切的关系。实验还发现在添加硝酸银后 ,ABA、IAA、iPAs浓度降低 ,DHZRs和ZRs的浓度比对照有所提高。推测硝酸银在桑组织培养中 ,可能通过调节内源激素的含量与比例 ,影响形态发生。因此在桑离体培养中 ,可以通过添加硝酸银来控制离体器官发生 ,进而建立高效再生体系 相似文献
20.
乙醇脱氢酶(alcohol dehydrogenase,ADH)是生物体内重要的乙醇代谢酶。生物信息学分析显示家蚕基因组中存在7个ADH编码基因(BmADH1～BmADH7),半定量RT-PCR检测BmADH2、BmADH3、BmADH4和BmADH5在家蚕5龄第3天幼虫的丝腺中表达水平较高,BmADH1、BmADH6、BmADH7在脂肪体中高水平表达。利用直接注射和口器灌喂2种方式,对家蚕5龄第3天幼虫分别以体积分数28%、56%的乙醇进行刺激处理后,调查家蚕体内乙醇的代谢与脂肪体中ADH基因的表达及酶活性变化。半定量RT-PCR检测表明56%乙醇注射处理组家蚕的脂肪体中BmADH1、BmADH6、BmADH7的表达上调,而28%乙醇处理后3个基因的表达基本无变化;酶活性检测表明28%、56%乙醇处理后1 h家蚕脂肪体中的ADH活性均显著升高(P<0.05);气相色谱分析显示家蚕血液中的乙醇会快速转化为乙醛。以上结果表明,家蚕幼虫在受到高浓度乙醇刺激后,通过上调脂肪体内的ADH基因的表达,增强ADH活性,使其参与体内乙醇的代谢过程,以保护蚕体免受高浓度乙醇的伤害。 相似文献