您好,欢迎来到试剂信息网! [登录] [免费注册]
试剂信息网
位置:首页 > 产品库 > GsMTx4
立即咨询
咨询类型:
     
*姓名:
*电话:
*单位:
Email:
*留言内容:
请详细说明您的需求。
*验证码:
 
GsMTx4
本产品不向个人销售,仅用作科学研究,不用于任何人体实验及非科研性质的动物实验。
规格:98%
分子量:4101.89
包装与价格:
包装价格(元)
500ug电议
1mg电议
5mg电议

产品介绍
GsMTx4 是一种蜘蛛毒液肽,选择性地抑制属于 Piezo 和 TRP 通道家族的阳离子可渗透的机械敏感性通道(MSCs)。GsMTx4 是一种重要的药理学工具,用于鉴定兴奋性 MSCs 在正常生理学和病理学中的作用。GsMTx4 显着减弱膀胱机能亢进。
货号:ajcx14822
CAS:1209500-46-8
分子式:C185H279N49O45S6
分子量:4101.89
溶解度:H2O : 16.67 mg/mL
纯度:98%
存储:Store at -20°C
库存:现货

Background:

GsMTx4 is a 34 amino acid spider venom peptide and belongs to the huwentoxin-1 family[1]. GsMTx4 selectively inhibits cation-permeable mechanosensitive channels (MSCs) belonging to the Piezo, TRPC1 and TRPC6 channels.

GsMTx4 is similar to many other channel-active peptides isolated from spider venom, which are small (3–5 kD) amphipathic molecules built on a conserved inhibitory cysteine-knot (ICK) backbone[4].GsMTx4 has high potency for inhibiting mechanosensitive channels, and its inhibition is not stereospecific, i.e., both its enantiomers (L- and D-form) inhibiting MSCs[3].

GsMTx4 significantly attenuates bladder hyperactivity[2]. Intraperitoneal injection of GsMTx-4 has been shown to reduce mechanical hyperalgesia induced by carrageenan or sciatic nerve injury[5], although it does not inhibit SAC currents in cultured DRG neurons[6].

GsMTx4 is an important pharmacological tool for identifying the role of these excitatory MSCs in normal physiology and pathology[4].

参考文献
[1]. Suchyna TM, et al. Identification of a peptide toxin from Grammostola spatulata spider venom that blocks cation-selective stretch-activated channels. J Gen Physiol. 2000 May;115(5):583-98.
[2]. Liu Q, et al. Increased Piezo1 channel activity in interstitial Cajal-like cells induces bladder hyperactivity by functionally interacting with NCX1 in rats with cyclophosphamide-induced cystitis. Exp Mol Med. 2018 May 7;50(5):60.
[3]. Suchyna T.M., Tape S.E., Gottlieb P.A. Bilayer-dependent inhibition of mechanosensitive channels by neuroactive peptide enantiomers. Nature. 2004;430:235–240.
[4]. Gnanasambandam R, et al. GsMTx4: Mechanism of Inhibiting Mechanosensitive Ion Channels. Biophys J. 2017 Jan 10;112(1):31-45.
[5]. Park SP, et al. A tarantula spider toxin, GsMTx4, reduces mechanical and neuropathic pain. Pain. 2008;137:208–217.
[6]. Drew LJ, , et al.. High-threshold mechanosensitive ion channels blocked by a novel conopeptide mediate pressure-evoked pain. PLoS ONE. 2007;2:e515.

Protocol:

Cell experiment [1]:

Cell lines

HEK 293 cells

Preparation method

For Piezo1 channels, the extracellular solution contained 145 mM NaCl, 5 mM KCl, 3 mM MgCl2, 0.1 mM CaCl2, and 10 mM HEPES (pH 7.4). The pipette solution contained 133 mM CsCl, 10 mM HEPES (pH 7.4). The inhibition produced by application of GsMTx4 was followed by ~60 s of washout, followed by application of WT GsMTx4 as a control.

Reaction Conditions

5 μM GsMTx4, 40s

Applications

GsMTx4 is a spider venom peptide that inhibits cationic mechanosensitive channels (MSCs). A model placing GsMTx4 at the membrane surface, where it is stabilized by the lysines, and occupying a small fraction of the surface area in unstressed membranes. When applied tension reduces lateral pressure in the lipids, the peptides penetrate deeper acting as “area reservoirs” leading to partial relaxation of the outer monolayer, thereby reducing the effective magnitude of stimulus acting on the MSC gate.

Animal experiment [2]:

Animal models

Male C57BL/6 mice

Dosage form

To the WT and ClockΔ19/Δ19 mice, GsMTx4 or vehicle was administered via intraperitoneal injection (IP) at two different time-points, Z12- and ZT0-IP (higher and lower Piezo1 expression periods in the WT mice, respectively). The WT and ClockΔ19/Δ19 mice were injected with 0.75 (low dose-IP) or 1.5 mg/kg (high dose-IP) of GsMTx4 in 100 μL of distilled water.

Applications

VF decreased at ZT12-IP in WT mice only with high dose of GsMTx4 but showed no effects in ClockΔ19/Δ19 mice. GsMTx4 did not affect Uvol in both mice at ZT12-IP. A decrease in Uvol was observed in both mice at ZT0-IP; however, it was unrelated to GsMTx4-IP. The effects of GsMTx4 changed associated with the circadian clock and Piezo1 expression level.

参考文献:

[1]. Gnanasambandam R, et al. GsMTx4: Mechanism of Inhibiting Mechanosensitive Ion Channels. Biophys J. 2017 Jan 10;112(1):31-45.

[2]. Ihara, Tatsuya, et al. "Different effects of GsMTx4 on nocturia associated with the circadian clock and Piezo1 expression in mice."Life Sciences278 (2021): 119555.