河南农业科学
河南農業科學
하남농업과학
JOURNAL OF HENAN AGRICULTURAL SCIENCES
2013年
10期
79-83
,共5页
郭直岳%王国红%甄静%贺秉军
郭直嶽%王國紅%甄靜%賀秉軍
곽직악%왕국홍%견정%하병군
氯虫酰胺%甜菜夜蛾%神经元%钠离子通道%膜片钳技术
氯蟲酰胺%甜菜夜蛾%神經元%鈉離子通道%膜片鉗技術
록충선알%첨채야아%신경원%납리자통도%막편겸기술
chlorantraniliprole%Laphygmaexigua%central neuron%sodium channel%patch clamp technique
为了研究新型杀虫剂氯虫酰胺对甜菜夜蛾(Laphygma exigua)的杀虫机制,应用全细胞膜片钳技术记录了氯虫酰胺对急性分离的甜菜夜蛾幼虫中枢神经细胞电压门控钠离子通道的影响。结果显示,在电压钳模式下,0.1 g/L药物作用1 min、5 min、15 min后平均钠离子通道电流峰值分别是(-9.627±0.114)nA、(-11.668±0.131)nA、(-8.726±0.398)nA。在电流钳模式下,0.4 g/L药物作用1 min、3 min、5 min后动作电位峰值分别为(94.366±4.596)m V、(90.363±2.258) m V、(83.15±2.959)m V ,时程分别为(5.025±0.884)m s、(6.032±0.073) m s、(6.387±0.376) ms ,药物作用10 min后只能产生电紧张,无法发放动作电位。以上结果表明,氯虫酰胺对钠电流的作用明显具有时间依赖性,0.1g/L药物初始可增加钠离子通道电流峰值,但随用药时间延长效果减弱。高质量浓度氯虫酰胺可时间依赖性地降低动作电位峰值和延长时程,降低细胞膜兴奋性。甜菜夜蛾中枢神经细胞钠离子通道是氯虫酰胺药物的作用靶标之一。
為瞭研究新型殺蟲劑氯蟲酰胺對甜菜夜蛾(Laphygma exigua)的殺蟲機製,應用全細胞膜片鉗技術記錄瞭氯蟲酰胺對急性分離的甜菜夜蛾幼蟲中樞神經細胞電壓門控鈉離子通道的影響。結果顯示,在電壓鉗模式下,0.1 g/L藥物作用1 min、5 min、15 min後平均鈉離子通道電流峰值分彆是(-9.627±0.114)nA、(-11.668±0.131)nA、(-8.726±0.398)nA。在電流鉗模式下,0.4 g/L藥物作用1 min、3 min、5 min後動作電位峰值分彆為(94.366±4.596)m V、(90.363±2.258) m V、(83.15±2.959)m V ,時程分彆為(5.025±0.884)m s、(6.032±0.073) m s、(6.387±0.376) ms ,藥物作用10 min後隻能產生電緊張,無法髮放動作電位。以上結果錶明,氯蟲酰胺對鈉電流的作用明顯具有時間依賴性,0.1g/L藥物初始可增加鈉離子通道電流峰值,但隨用藥時間延長效果減弱。高質量濃度氯蟲酰胺可時間依賴性地降低動作電位峰值和延長時程,降低細胞膜興奮性。甜菜夜蛾中樞神經細胞鈉離子通道是氯蟲酰胺藥物的作用靶標之一。
위료연구신형살충제록충선알대첨채야아(Laphygma exigua)적살충궤제,응용전세포막편겸기술기록료록충선알대급성분리적첨채야아유충중추신경세포전압문공납리자통도적영향。결과현시,재전압겸모식하,0.1 g/L약물작용1 min、5 min、15 min후평균납리자통도전류봉치분별시(-9.627±0.114)nA、(-11.668±0.131)nA、(-8.726±0.398)nA。재전류겸모식하,0.4 g/L약물작용1 min、3 min、5 min후동작전위봉치분별위(94.366±4.596)m V、(90.363±2.258) m V、(83.15±2.959)m V ,시정분별위(5.025±0.884)m s、(6.032±0.073) m s、(6.387±0.376) ms ,약물작용10 min후지능산생전긴장,무법발방동작전위。이상결과표명,록충선알대납전류적작용명현구유시간의뢰성,0.1g/L약물초시가증가납리자통도전류봉치,단수용약시간연장효과감약。고질량농도록충선알가시간의뢰성지강저동작전위봉치화연장시정,강저세포막흥강성。첨채야아중추신경세포납리자통도시록충선알약물적작용파표지일。
In order to study the insecticidal mechanism of the new insecticide chlorantraniliprole on Laphygma exigua ,the effects of chlorantraniliprole on sodium channel currents of acutely isolated central neurons from Laphygmaexigua were studied using whole-cell patch clamp tech-nique .The results showed that after application of chlorantraniliprole (0 .1 g/L ) ,the current spike was (-9 .627 ± 0 .114) nA in 1 minute ,(-11 .668 ± 0 .131) nA in 5 minutes ,(-8 .726 ± 0.398) nA in 15 minutes .In current clamp mode ,after application of the drug (0 .4 g/L ) the ac-tion potential spike was (94 .366 ± 4 .596) mV in 1 minute ,(90 .363 ± 2 .258) mV in 3 minutes , (83 .15 ± 2 .959) mV in 5 minutes .The duration was prolonged from (5 .025 ± 0 .884) ms in 1 mi-nute to (6 .032 ± 0 .073) ms in 3 minutes to (6 .387 ± 0 .376) ms in 5 minutes .After 10 min of drug action ,only electric tension was produced ,with no action potential .The results indicated that chlorantraniliprole changed the inward sodium current in a concentration-dependent manner .After treatment with the drug of 0 .1 g/L ,the current peak was increased in the beginning ,and then re-duced slowly .The decrease of action potential spike and the extension of the duration maybe re-sult from the inhibition effects of chlorantraniliprole on the sodium currents .In conclusion ,the so-dium channel in central neurons of Laphygmaexigua was one of the action targets of chlorantra-niliprole .