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《中国兽医杂志》2014,(11)
为研究噻拉嗪对山羊不同脑区Na+-K+-ATP酶和Ca2+-Mg2+-ATP酶活性的影响,探讨噻拉嗪麻醉山羊的中枢作用机制。试验将25只山羊随机平均分成对照组、诱导组、麻醉组、恢复Ⅰ组和恢复Ⅱ组共5组。对照组肌肉注射生理盐水10 m L,试验组肌肉注射噻拉嗪12.8 mg/kg体重。10 min后、山羊倒地、翻正反射消失后、翻正反射恢复后和翻正反射恢复后6 h断头取脑组织,采用分光光度法测定山羊各脑区Na+-K+-ATP酶和Ca2+-Mg2+-ATP酶活性。结果大脑皮质、丘脑的Na+-K+-ATP酶活性分别较对照组降低30.1%和21.9%(P<0.01);大脑皮质、海马、丘脑、小脑和脑干内Ca2+-Mg2+-ATP酶活性分别较对照组降低36.5%、38.6%、35.1%、36.9%和37.9%(P<0.01)。恢复Ⅰ组和恢复Ⅱ组两种ATP酶活性的变化与对照组相比差异均无统计学意义(P>0.05)。表明噻拉嗪通过大脑皮质和丘脑Na+-K+-ATP酶及大脑皮质、海马、丘脑、小脑和脑干内Ca2+-Mg2+-ATP酶活性作用的改变起麻醉作用。 相似文献
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《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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《中国兽医杂志》2016,(7)
为研究咪达唑仑对山羊不同脑区Ca~(2+)-Mg~(2+)-ATP酶活性的影响,探讨其在中枢麻醉的作用机制。试验用15只健康山羊,3只为生理盐水对照组,其余为试验组,试验组山羊肌肉注射14 mg/kg体重咪达唑仑。分别在给药后诱导期、麻醉期、恢复Ⅰ期和恢复Ⅱ期4个时间点,每点剖杀3只山羊取脑组织,采用分光光度法测定不同脑区Ca~(2+)-Mg~(2+)-ATP酶活性。结果注射咪达唑仑能明显抑制山羊大脑、丘脑、小脑和脑干的Ca~(2+)-Mg~(2+)-ATP酶活性,这种变化趋势与山羊肌肉注射咪达唑仑麻醉后行为学变化基本一致,海马的Ca~(2+)-Mg~(2+)-ATP酶活性在整个麻醉过程中无明显变化。表明咪达唑仑的麻醉作用可能与抑制山羊大脑、丘脑、小脑和脑干的Ca~(2+)-Mg~(2+)-ATP酶活性相关。 相似文献
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《畜牧与兽医》2016,(4):84-86
通过测定强痛宁作用下大鼠中枢脑区Ca~(2+),Mg~(2+)-ATP酶活性变化,探讨其麻醉镇痛作用与中枢脑区Ca~(2+),Mg~(2+)-ATP酶相关性。将24只纯种SD大鼠随机分成对照组、诱导组、麻醉组和催醒组,于各时间点冰上采集大鼠各脑区,采用比色法测定Ca~(2+),Mg~(2+)-ATP酶活性。结果表明:药物作用引起诱导期及麻醉期大鼠大脑皮质、小脑、海马、丘脑及脑干区Ca~(2+),Mg~(2+)-ATP酶活性降低,与对照组比较差异显著(P0.01或P0.05);催醒期各脑区Ca~(2+),Mg~(2+)-ATP酶活性恢复到麻前水平。结果提示,强痛宁作用下引起大鼠各脑区Ca~(2+),Mg~(2+)-ATP酶活性降低,阻碍了神经细胞对痛觉刺激信息传导,产生麻醉镇痛作用。 相似文献
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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
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《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
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《中兽医医药杂志》2019,(6)
探讨T-2毒素对TM3细胞线粒体功能的影响。将不同浓度T-2毒素(0 nM、1 nM、10 nM、100 nM)作用于TM3细胞24 h,通过MTT法检测T-2毒素对TM3细胞增殖的影响;生化方法测定细胞内Ca~(2+)、活性氧、线粒体超氧化物、ATP的含量、Ca~(2+)-Mg~(2+)-ATPase和Na~+-K~+-ATPase的活性以及线粒体膜电位的变化。结果显示,T-2毒素对TM3细胞具有毒性作用,可引起细胞内Ca~(2+)含量增加,使细胞内活性氧和线粒体超氧化物的含量增加,降低线粒体膜电位、ATP的含量以及ATP依赖的Ca~(2+)-Mg~(2+)-ATPase和Na~+-K~+-ATPase的活性,进而影响线粒体功能的发挥。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献