Protein Information

Name TREK 1
Synonyms KCNK 2; KCNK2; Outward rectifying potassium channel protein TREK 1; Potassium channel subfamily K member 2; Potassium inwardly rectifying channel subfamily K member 2; TPKC 1; TPKC1; TREK…

Compound Information

Name 4-aminopyridine
CAS 4-pyridinamine

Reference List

PubMed Abstract RScore(About this table)
15608074 Tertyshnikova S, Knox RJ, Plym MJ, Thalody G, Griffin C, Neelands T, Harden DG, Signor L, Weaver D, Myers RA, Lodge NJ: BL-1249 [(5,6,7,8-tetrahydro-naphthalen-1-yl)-[2-(1H-tetrazol-5-yl)-phenyl]-amine] : a putative potassium channel opener with bladder-relaxant properties. J Pharmacol Exp Ther. 2005 Apr;313(1):250-9. Epub 2004 Dec 17.

A survey of potassium channels exhibiting sensitivity to extracellular Ba2+ at millimolar concentration revealed that the expression of the K2P2.1 (TREK-1) channel was relatively high in human bladder cells versus human aortic cells, suggesting this channel as a possible candidate target for BL-1249.
The BL-1249-evoked outward K+ current was insensitive to blockade by glyburide, tetraethylammonium, iberiotoxin, 4-aminopyridine, apamin, or Mg2+.
1(0,0,0,1) Details
16565299 Bryan RM Jr, You J, Phillips SC, Andresen JJ, Lloyd EE, Rogers PA, Dryer SE, Marrelli SP: Evidence for two-pore domain potassium channels in rat cerebral arteries. Am J Physiol Heart Circ Physiol. 2006 Aug;291(2):H770-80. Epub 2006 Mar 24.

RT-PCR revealed message for the following AA-sensitive K (2P) channels in rat MCA: tandem of P domains in weak inward rectifier K+ (TWIK-2), TWIK-related K+ (TREK-1 and TREK-2), TWIK-related AA-stimulated K+ (TRAAK), and TWIK-related halothane-inhibited K+ (THIK-1) channels.
AA-induced dilation was not affected by inhibition of cyclooxygenase, epoxygenase, or lipoxygenase or inhibition of classical K+ channels with 10 mM TEA, 3 mM 4-aminopyridine, 10 microM glibenclamide, or 100 microM Ba2+.
1(0,0,0,1) Details
12680846 Aimond F, Fauconnier J, Donadille D, Vassort G: The p42/44mitogen-activated protein kinase inhibitor PD 98059, but not U 0126, increases a K+ current in cardiomyocytes. Clin Exp Pharmacol Physiol. 2003 Apr;30(4):273-7.


These observations indicate that PD 98059 activates a TREK-1 like current.
1(0,0,0,1) Details
17828284 Westphalen RI, Krivitski M, Amarosa A, Guy N, Hemmings HC Jr: Reduced inhibition of cortical glutamate and GABA release by halothane in mice lacking the K+ channel, TREK-1. Br J Pharmacol. 2007 Nov;152(6):939-45. Epub 2007 Sep 10.

KEY RESULTS: Deletion of TREK-1 significantly reduced the potency of halothane inhibition of 4-aminopyridine-evoked release of both glutamate and GABA without affecting control evoked release or the selective inhibition of glutamate vs GABA release.
93(1,1,2,8) Details
17659475 Mathie A, Veale EL: Therapeutic potential of neuronal two-pore domain potassium-channel modulators. Curr Opin Investig Drugs. 2007 Jul;8(7):555-62.

Although not inhibited by classical potassium channel-blocking drugs, such as tetraethylammonium and 4-aminopyridine, K2P channels are regulated by a diverse array of pharmacological mediators.
There are six main families of K2P channels and among these certain members of the TREK family (ie, TREK-1 and TREK-2) are activated by general anesthetic agents such as halothane, xenon and nitrous oxide.
3(0,0,0,3) Details
15066906 Gardener MJ, Johnson IT, Burnham MP, Edwards G, Heagerty AM, Weston AH: Functional evidence of a role for two-pore domain potassium channels in rat mesenteric and pulmonary arteries. Br J Pharmacol. 2004 May;142(1):192-202. Epub 2004 Apr 5.

RT-PCR demonstrated the expression of TASK-1, TASK-2, THIK-1, TRAAK, TREK-1, TWIK-1 and TWIK-2 in mesenteric arteries and TASK-1, TASK-2, THIK-1, TREK-2 and TWIK-2 in pulmonary arteries.
K (+) channel blockade by 4-aminopyridine (4-AP) (5 mm), tetraethylammonium (TEA) (10 mm), Ba (2+) (30 microm) and glibenclamide (10 microm) depolarised the pulmonary artery.
2(0,0,0,2) Details
12559116 Lesage F: Pharmacology of neuronal background potassium channels. Neuropharmacology. 2003 Jan;44(1):1-7.

In the nervous system, the main representatives of this family are the TASK and TREK channels.
They are relatively insensitive to the broad-spectrum K (+) channel blockers tetraethylammonium (TEA), 4-aminopyridine (4-AP), Cs (+), and Ba (2+).
2(0,0,0,2) Details