Avermectin B1a
mRNA synthesis
In vitro transcription of capped mRNA with modified nucleotides and Poly(A) tail
Tyramide Signal Amplification (TSA)
TSA (Tyramide Signal Amplification), used for signal amplification of ISH, IHC and IC etc.
Phos Binding Reagent Acrylamide
Separation of phosphorylated and non-phosphorylated proteins without phospho-specific antibody
Cell Counting Kit-8 (CCK-8)
A convenient and sensitive way for cell proliferation assay and cytotoxicity assay
SYBR Safe DNA Gel Stain
Safe and sensitive stain for visualization of DNA or RNA in agarose or acrylamide gels.
Inhibitor Cocktails
Protect the integrity of proteins from multiple proteases and phosphatases for different applications.
Avermectin B1a是γ-氨基丁酸(GABA)门控氯离子通道的调节剂[1]。
Avermectin B1a是大环内酯衍生物,具有驱虫和杀虫活性。Avermectin B1a是源自链霉菌的发酵产物。一般情况下,Avermectin B1a用作驱虫和杀虫药剂。在线虫中,Avermectin B1a抑制从中枢指令神经元向外围运动神经元的信号传导。其机理是,Avermectin B1a可以增强谷氨酸对γ-氨基丁酸(GABA)门控氯离子通道的作用,从而使氯离子流入细胞,最终导致超极化和神经肌肉系统瘫痪。此兴奋作用可由氯离子通道阻滞剂Picrotoxin逆转。因为哺乳动物没有这类离子通道,Avermectin B1a对哺乳动物无毒性[1,2]。
在大鼠脑的突触膜上,相对于对照组,7 μM的Avermectin B1a显著增加GABA结合(达80%以上)。当突触膜在60℃下与50 mM Tris-Cl一起孵育,Avermectin B1a也抑制GABA受体变性。在龙虾拉伸肌肉中,给予Avermectin B1a可以阻断抑制性突触后电位以及降低兴奋性突触后电位。此外,Avermectin B1a促进Benzodiazepine结合。Avermectin B1a也能促使Flunitrazepan结合到突触膜上,其EC50值比对GABA的低50倍[3,4]。
口服给予牛0.1 mg/kg的Avermectin B1a可以减少95%以上的蛇形毛圆线虫、艾氏毛圆线虫、柏氏血矛线虫、肿孔古柏线虫、点状古柏线虫、Ostertagi胃线虫、辐射食道口线虫和胎生网尾线虫。当给予羊同等的剂量时,Avermectin B1a也可以减少95%以上的艾氏毛圆线虫、捻转血矛线虫、肿孔古柏线虫、蛇形毛圆线虫、环纹奥斯特线虫和哥伦比亚食道口线虫[5]。
参考文献:
[1] Wang C C, Pong S S. Actions of avermectin B1a on GABA nerves. Progress in clinical and biological research, 1981, 97: 373-395.
[2] Bloomquist J R. Toxicology, mode of action and target site-mediated resistance to insecticides acting on chloride channels. Comparative Biochemistry and Physiology Part C: Pharmacology, Toxicology and Endocrinology, 1993, 106(2): 301-314.
[3] Pong S S, DeHaven R, Wang C C. A comparative study of avermectin B1a and other modulators of the gamma-aminobutyric acid receptor. chloride ion channel complex. The Journal of Neuroscience, 1982, 2(7): 966-971.
[4] Fritz L C, Wang C C, Gorio A. Avermectin B1a irreversibly blocks postsynaptic potentials at the lobster neuromuscular junction by reducing muscle membrane resistance. Proceedings of the National Academy of Sciences, 1979, 76(4): 2062-2066.
[5] Egerton J R, Ostlind D A, Blair L S, et al. Avermectins, new family of potent anthelmintic agents: efficacy of the B1a component. Antimicrobial Agents and Chemotherapy, 1979, 15(3): 372-378.
Storage | Store at -20°C |
M.Wt | 873.08 |
Cas No. | 65195-55-3 |
Formula | C48H72O14 |
Solubility | ≥143.4 mg/mL in DMSO; ≥11.86 mg/mL in EtOH with ultrasonic; insoluble in H2O |
SDF | Download SDF |
Canonical SMILES | CCC(C)C1C(C=CC2(O1)CC3CC(O2)CC=C(C(C(C=CC=C4COC5C4(C(C=C(C5O)C)C(=O)O3)O)C)OC6CC(C(C(O6)C)OC7CC(C(C(O7)C)O)OC)OC)C)C |
运输条件 | 蓝冰运输或根据您的需求运输。 |
一般建议 | 不同厂家不同批次产品溶解度各有差异,仅做参考。若实验所需浓度过大至产品溶解极限,请添加助溶剂助溶或自行调整浓度。溶液形式一般不宜长期储存,请尽快用完。 |
动物实验 [1]: | |
动物模型 |
牛,羊 |
剂量 |
0.1 mg/kg(p.o.) |
应用 |
当给牛服用时,以0.1 mg / kg的剂量口服avermectin B1a可减少95%的T. colubriformis, T. axei, Haemonchus placei, C. oncophora, Cooperia punctate, Ostertagia ostertagi, Oesophagostomum radiatum 和Dictyocaulus viviparus。当以相同剂量给绵羊服用时,avermectin B1a也使Trichostrongylus axei, Haemonchus contortus, Cooperia oncophora, Trichostrongylus colubriformis, Ostertagia circumcincta 和 Oesophagostomum columbianum的量减少了95%以上。 |
注意事项 |
请测试所有化合物在室内的溶解度,实际溶解度和理论值可能略有不同,这是由实验系统的误差引起的,属于正常现象。 |
References: [1]. Egerton JR, Ostlind DA, Blair LS, Eary CH, Suhayda D, Cifelli S, Riek RF, Campbell WC. Avermectins, new family of potent anthelmintic agents: efficacy of the B1a component. Antimicrob Agents Chemother. 1979 Mar;15(3):372-8. doi: 10.1128/aac.15.3.372. PMID: 464563; PMCID: PMC352668. |
Description | Avermectin B1a是一种具有杀虫和杀螨功能的大环内酯。 | |||||
靶点 | insect | acarid | ||||
IC50 |
质量控制和MSDS
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