猪肾脏中氯丙嗪和异丙嗪残留检测方法的建立

建立了猪肾脏中氯丙嗪和异丙嗪残留量检测的高效液相色谱法。猪肾脏中残留的氯丙嗪和异丙嗪,用乙腈提取,再依次用酸化乙腈和正己烷净化,氮气吹干,甲醇溶解后,用Waters高效液相色谱系统,HypersilC18柱,UV检测器,用V(乙腈)∶V(水)∶V(0.5mol·L-1乙酸铵)(50∶49∶1)为流动相,流速1.2mL/min,波长254nm测定,内标法定量。结果表明,氯丙嗪和异丙嗪在猪肾脏中的最低检测限均为10μg/kg,组织中添加量为10μg/kg时,氯丙嗪和异丙嗪的回收率分别为83%和84%,批间变异系数均小于20%。该方法样品处理简单,可同时检测氯丙嗪和异丙嗪在猪肾脏中的残留量。     

氯丙嗪残留检测技术研究进展

食品安全问题日益成为社会关注的焦点,氯丙嗪作为兽药和饲料添加剂饲喂动物会造成大量残留,作者对现有的各种检测方法作一概述,以便研究者能在此基础上进一步改进和发展。     

Agmatine protection against chlorpromazine-induced forebrain cortex injury in rats

This study was conducted to investigate whether agmatine (AGM) provides protection against oxidative stress induced by treatment with chlorpromazine (CPZ) in Wistar rats. In addition, the role of reactive oxygen species and efficiency of antioxidant protection in the brain homogenates of forebrain cortexes prepared 48 h after treatment were investigated. Chlorpromazine was applied intraperitoneally (i.p.) in single dose of 38.7 mg/kg body weight (BW) The second group was treated with both CPZ and AGM (75 mg/kg BW). The control group was treated with 0.9% saline solution in the same manner. All tested compounds were administered i.p. in a single dose. Rats were sacrificed by decapitation 48 h after treatment Treatment with AGM significantly attenuated the oxidative stress parameters and restored antioxidant capacity in the forebrain cortex. The data indicated that i.p. administered AGM exerted antioxidant action in CPZ-treated animals. Moreover, reactive astrocytes and microglia may contribute to secondary nerve-cell damage and participate in the balance of destructive vs. protective actions involved in the pathogenesis after poisoning.     

Substitutes for benzidine as H‐donors in the peroxidase assay,for rapid diagnosis of iron deficiency in plants

Abstract

3,3'5,5’ Tetramethyl benzidine, 3‐Amino‐9‐ethylcarbazol and chlorpromazine are suggested as alternatives for benzidine as H‐donors in the peroxidase assay for diagnosing iron deficiency in plant leaves. Procedures with these reagents, which have been used successfully with citrus and other plants, are described.     

超高效液相色谱—串联质谱法检测六种动物组织中盐酸氯丙嗪残留

建立了检测六种动物组织中盐酸氯丙嗪残留的超高效液相色谱-串联质谱(UPLC/MS/MS)分析方法。样品经碱性乙醚提取,浓缩后用甲醇溶解,经超高液相色谱-串联质谱在多反应检测(MRM)模式下测定。在3 min以内完成盐酸氯丙嗪的定量分析。结果显示盐酸氯丙嗪标准曲线在0.2~100μg/L浓度范围内线性良好,标准溶液中D3-氯丙嗪内标浓度为固定值5μg/L。线性相关系数(r)为0.999 8;在0.5、1、5、10μg/kg添加水平下,盐酸氯丙嗪的加标回收率在83%~104%,相对标准偏差(RSD)均小于10%(n=6);本方法对六种动物组织中盐酸氯丙嗪的定量限为0.5μg/kg(S/N10),检出限为0.2μg/kg(S/N3)。     

Modulators of membrane drug transporters potentiate the activity of the DMI fungicide oxpoconazole against Botrytis cinerea

Modulators known to reduce multidrug resistance in tumour cells were tested for their potency to synergize the fungitoxic activity of the fungicide oxpoconazole, a sterol demethylation inhibitor (DMI), against Botrytis cinerea Pers. Chlorpromazine, a phenothiazine compound known as a calmodulin antagonist, appeared the most potent compound. Tacrolimus, a macrolide compound with immunosuppressive activity, was also active. The synergism of chlorpromazine negatively correlated with the sensitivity of the parent strain and mutants of B. cinerea. The synergism was highest in a mutant that overexpressed the ATP-binding cassette transporter BcatrD, known to transport DMI fungicides such as oxpoconazole. The synergism of chlorpromazine positively correlated with its potency to enhance the accumulation of oxpoconazole in BcatrD mutants. These results indicate that chlorpromazine is a modulator of BcatrD activity in B. cinerea and suggest that mixtures of DMI fungicides with modulators may represent a perspective for the development of new resistance management strategies.     

UPLC-MS/MS法测定3种兽药制剂中违禁药物氯丙嗪

建立了3种兽药制剂中违禁药物氯丙嗪的超高效液相色谱-串联质谱(UPLC-MS/MS)检测方法。用无水乙醇超声提取试样中违禁药物氯丙嗪,采用Waters ACQUITY UPLC BEH C18柱(50 mm×2.1 mm,1.7μm),乙腈和10 mmol/L乙酸铵+0.1%甲酸溶液流动相,梯度洗脱,电离喷雾电离方式(ESI+),多反应监测(MRM)定量。该方法线性关系良好,相关系数r2达到0.9956,回收率在88.3%~96.7%之间,相对标准偏差(RSD)介于3.7%~8.1%。方法的检出限为0.003 mg/kg。本方法适用于兽药制剂中氯丙嗪违法添加的定性、定量分析。     

氯丙嗪对大鼠离体培养卵巢颗粒细胞凋亡的影响

本试验旨在通过氯丙嗪对颗粒细胞凋亡影响的研究,探讨氯丙嗪对雌性大鼠性腺毒性的作用机制。对未成熟的Wistar大鼠卵巢颗粒细胞进行原代培养,用不同浓度的氯丙嗪(0、0.1、1、10 μmol/L)染毒细胞,细胞培养24 h。染毒结束后采用MTT法检测细胞相对活力,荧光染料Hoechest 33258检测颗粒细胞的凋亡变化,RT-PCR检测凋亡调控基因Bax、Bcl-2和P53 mRNA的表达。在本试验所设置的剂量范围内,与对照组比较,氯丙嗪能极显著促进颗粒细胞凋亡(P＜0.01),呈浓度依赖关系;RT-PCR检测则显示氯丙嗪能引起Bcl-2、Bax、P53 mRNA表达水平和Bax mRNA/Bcl-2 mRNA值升高,除低剂量组的Bax mRNA表达水平和Bax mRNA/Bcl-2 mRNA值无明显改变外,其余各组与对照组相比均差异极显著(P＜0.01)。氯丙嗪可显著抑制大鼠卵巢颗粒细胞活力,诱导颗粒细胞凋亡。     

氯丙嗪对大鼠卵巢颗粒细胞分泌功能的影响

为研究大鼠卵巢颗粒细胞(GC)的分泌功能,用氯丙嗪染毒体外培养的大鼠GC,采用MTT法检测细胞相对活力,ELISA法检测收集培养液中孕酮(P)和雌二醇(E2)的含量,半定量RT-PCR检测激素分泌相关调控基因FSHR、StAR、P450scc和P450arom mRNA的表达,免疫细胞化学染色法检测细胞中特异卵泡刺激素...