GABA and Dopamine Release from Different Brain Regions in Mice with Chronic Exposure to Organophosphate Methamidophos     

Noriega-Ortega BR  Armienta-Aldana E  Cervantes-Pompa JÁ  Armienta-Aldana E  Hernández-Ruíz E  Chaparro-Huerta V  Bravo-Cuellar A  Beas-Zárate C 《Journal of toxicologic pathology》2011,24(3):163-168

Organophosphates such as methamidophos, usually used in the agricultural field, have harmful effects on humans. Exposures to insecticides has been associated with many disorders, including damage to the central and peripheral nervous system. Chronic exposure to organophosphates may lead to persistent neurological and neurobehavioral effects. This study was conducted to determine the effect of methamidophos on [(3)H]-dopamine (DA) and gamma aminobutyric acid (GABA) release from different brain regions after chronic exposure to it for 3, 6 or 9 months. After a six-month methamidophos treatment, the mice showed high susceptibility to convulsive seizures and a reduction in stimulated gamma aminobutyric acid release from the cerebral cortex and hippocampal slices, whereas stimulated (DA) release was slightly decreased from the striatum after three months of methamidophos exposure. The results indicate changes in gamma aminobutyric acid and dopamine neurotransmission, suggesting a specific neuronal damage.  相似文献   

Ivermectin impairs sexual behavior in sexually naïve, but not sexually experienced male rats     

M.M. Bernardi  T.B. Kirsten  H. Manzano 《Research in veterinary science》2011,91(1):77-81

Ivermectin (IVM) is an antiparasitic drug, widely used in domestic animals. In mammals, IVM act as a GABA agonist. This neurotransmitter has an important role in the regulation of sexual behavior. Thus, this study sought to investigate the effects of various medically relevant doses IVM on the sexual behavior of male rats. In particular, we also wished to examine if previous sexual experience modulated responses to IVM. In the first experiment, the sexual behavior of inexperienced male rats was analyzed after they received 0.2, 0.6, 1.0 or 2.0 mg/kg IVM, 15 min prior to behavioral testing. In the second experiment, the effects of four previous sexual experiences on IVM treated rats (1.0 or 2.0 mg/kg, 15 min prior to the 5th session) were assessed. The standard therapeutic dose (0.2 mg/kg) did not impair the sexual behavior of inexperienced male rats. At a more concentrated dose (0.6 mg/kg), which is still within the therapeutic range, the appetitive phase of sexual behavior of inexperienced male rats was impaired. Likewise, 1.0 mg/kg impaired the appetitive phase. Previous sexual experience blocked almost entirely this sexual impairment, suggesting that previous sexual experience exerts a positive effect in attenuating the sexual impairment produced by IVM treatment. Therefore, the standard therapeutic dose of IVM can be used without producing side effects on sexual behavior. Use of more concentrated therapeutic doses is not recommended during reproductive periods, unless the animals have had previous sexual experience.  相似文献   

γ-氨基丁酸对肉雏鸡生产性能和血清生化指标的影响     

陈强  肖银霞 《畜牧与兽医》2013,45(6)

为研究日粮中不同添加剂量γ-氨基丁酸(GABA)对肉雏鸡生长性能和血清生化指标的影响,将500只1日龄三黄羽肉雏鸡随机分为5组(每组100羽),其中对照组饲喂基础日粮,试验I、Ⅱ、Ⅲ、Ⅳ组分别在日粮中添加5、30、50和70 mg/kg的GABA,统计试验全期(1～42日龄)的生长性能指标,并测定21和42日龄血清生化指标。结果显示:试验Ⅳ组体重显著高于对照组(P<0.05),试验Ⅱ、Ⅲ组极显著高于对照组(P<0.01);试验Ⅳ组平均日增重显著高于对照组(P<0.05),而试验Ⅱ、Ⅲ组极显著高于对照组(P<0.01);各组间平均日采食量差异不显著(P>0.05);试验Ⅱ组料重比显著低于对照组(P<0.05)。结果提示:日粮中添加GABA可以增加肉雏鸡的体重、提高平均日增重、降低平均日采食量;肉雏鸡血清生化指标不受GABA的影响;日粮中推荐添加30 mg/kg的GABA。  相似文献   

近平滑假丝酵母（Candida parapsilosis）发酵普洱茶初探     

李亚莉  秘鸣  魏珍珍  周红杰 《茶叶科学》2013,(5)

以晒青茶为原料,接种专利菌株近平滑假丝酵母（ Candida parapsilosis ） GPT-5-11（专利号：201010182948.5）发酵普洱茶。结果表明,接种菌株的普洱茶样品GABA含量为0.3052~1.5332 mg/g,显著高于对照0.0628~0.1047 mg/g,其中灭菌每翻接种液态菌的样品 GABA含量最高,为1.5332 mg/g,达到 GABA茶的标准。同时,接种该菌株进行发酵后,发酵茶样中的主要功能成分含量均较自然发酵茶叶中的含量高,具有传统普洱茶的品质风味,且在香气和滋味方面有自身的特点,滋味醇和、厚滑,香气纯正略带乳香。  相似文献   

Effect of dietary γ-aminobutyric acid on laying performance,egg quality,immune activity and endocrine hormone in heat-stressed Roman hens     

Min ZHANG  Xiao-ting ZOU  Hui LI  Xin-yang DONG  Wenjing ZHAO 《Animal Science Journal》2012,83(2):141-147

This study was conducted to evaluate the effect of γ-aminobutyric acid (GABA) on laying performance, egg quality, digestive enzyme activity, hormone level and immune activities in Roman hens under heat stress. Roman hens (320 days old) were fed with 0, 25, 50, 75 and 100 mg/kg GABA, respectively during a 60-day experiment. Compared with control, supplementation of 50 mg/kg GABA improved the laying performance and egg quality by significantly increasing egg production, average egg weight and shell strength (P < 0.05), while decreasing the feed–egg ratio and cholesterol level. Anti-oxidation activity was improved by significantly increasing the activity of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), but decreasing malondialdehyde level in serum (P < 0.05), while significantly increasing the glucose and total protein (TP) level, follicle stimulating hormone (FSH), luteinizing hormone (LH), estradiol (E₂), insulin, triiodothyronine (T₃) and free triiodothyronine (FT₃) levels, and IgG, IgA and complement (C3)activity in serum (P < 0.05). The results indicated that oral GABA improved laying performance and physical condition mainly by modulating hormone secretion, enhancing anti-oxidation and immune activity, and maintaining electrolyte balance. Fifty mg/kg was the optimum level for laying hens under heat stress in the present study.  相似文献   

GABA对不同盐浓度下小麦萌发的影响   总被引：2，自引：1，他引：1  

贺立龙  单忠英  高娜娜  郭尚敬 《天津农业科学》2011,17(3):12-14

不同浓度NaCl和GABA处理不同品系的小麦种子,然后记录其萌发相关的生理数据。结果表明,在轻度盐胁迫下,一定浓度的GABA能提高不同品系小麦对盐的抗性。  相似文献   

γ–氨基丁酸浸种对高氮处理下白菜生长及硝酸盐代谢的影响     

李敬蕊  田真  吴晓蕾  宫彬彬  高洪波 《园艺学报》2016,43(11):2182-2192

在营养液中添加硝态氮模拟设施白菜(Brassica campestris ssp.chinensis Makino)生产中氮肥施用量,采用5、10 mmol·L~(-1)γ–氨基丁酸(GABA)浸泡种子,研究GABA对白菜生长以及硝酸盐代谢过程中物质含量和关键酶活性、基因表达和蛋白表达的影响。结果表明:与对照和未经GABA浸种的高氮处理相比,GABA浸种显著促进了高氮条件下白菜的生长,并通过显著提高叶片硝酸还原酶(NR)、亚硝酸还原酶(NiR)、谷氨酸脱羧酶(GAD)等关键酶活性以及NR、GAD基因和蛋白表达量,诱导硝酸盐、亚硝酸盐含量显著降低,但铵态氮(NH_4~+-N)、谷氨酸(Glu)和内源GABA含量仍维持较高水平。进一步分析表明,GABA浸种降低硝酸盐的效果存在时效性和浓度差异,在高氮处理0~12 d时效果较明显,5 mmol·L~(-1) GABA处理效果较好;并且GABA对NR、GAD基因、蛋白表达的影响早于酶活性的变化。结果证明GABA浸种在促进植株生长的同时,通过提高叶片NR、GAD等代谢关键酶的活性、基因和蛋白表达量,加速了无机氮的还原和同化,从而降低叶片硝酸盐含量,提高白菜的产量和品质。  相似文献   

γ-氨基丁酸超微绿茶粉辅助降血压功能研究   总被引：1，自引：0，他引：1  

谭俊峰  林智  彭群华  郭丽  吕海鹏 《茶叶科学》2012,32(5):461-464

参照《保健食品检验与评价技术规范2003版》对γ-氨基丁酸(GABA)超微绿茶粉进行辅助降血压功能评价.动物实验设低、中、高(0.83、1.67、5.00 g/kg)3个剂量组,分别相当于人体推荐剂量的5、10、30倍.另设高血压模型对照组和正常动物高剂量对照组.经口连续给予样品30d,结果显示:高剂量组(5.00 g...  相似文献   

外源GABA对NaCl胁迫下番茄幼苗活性氧代谢及叶绿素荧光参数的影响   总被引：1，自引：0，他引：1  

罗黄颖  高洪波  夏庆平 《河北农业大学学报》2011,34(3):37-40,84

采用水培法,研究了外源添加2.5 mmol/L GABA(γ-氨基丁酸)对NaCl胁迫下‘金棚一号'番茄(Lycopersicon esculentum Mill.)幼苗活性氧(ROS)代谢及叶绿素荧光参数的影响.结果表明:NaCl胁迫处理导致番茄幼苗ROS积累,同时抗氧化酶(SOD、CAT)活性显著提高,但抗氧化酶活...  相似文献   

Differential mechanisms of action of the novel γ‐aminobutyric acid receptor antagonist ectoparasiticides fluralaner (A1443) and fipronil          下载免费PDF全文

Miho Asahi  Masaki Kobayashi  Hiroto Matsui  Kunimitsu Nakahira 《Pest management science》2015,71(1):91-95

  相似文献