Protein Information

Name complex I
Synonyms 39kD; CI 39kD; Complex I; Complex I 39kD; NADH dehydrogenase (ubiquinone) Fe S protein 2 like; NADH ubiquinone oxidoreductase 39 kDa subunit mitochondrial; NADH ubiquinone oxidoreductase 39 kDa subunit; NDUFA 9…

Compound Information

Name 4-aminopyridine
CAS 4-pyridinamine

Reference List

PubMed Abstract RScore(About this table)
17468198 Bukiya AN, Liu J, Toro L, Dopico AM: Beta1 (KCNMB1) subunits mediate lithocholate activation of large-conductance Ca2+-activated K+ channels and dilation in small, resistance-size arteries. Mol Pharmacol. 2007 Aug;72(2):359-69. Epub 2007 Apr 27.

LC activation of cbv1+beta1 and native BK channels display identical characteristics, including EC50 (46 microM) and Emax (approximately 300 microM) values, strongly suggesting that the cbv1+beta1 complex is necessary and sufficient to evoke LC action.
LC action is independent of endothelial integrity, prevented by 55 nM iberiotoxin, and unmodified by 0.8 mM 4-aminopyridine, indicating that LC causes vasodilation via myocyte BK channels.
1(0,0,0,1) Details
17023676 Saitoh S, Zhang C, Tune JD, Potter B, Kiyooka T, Rogers PA, Knudson JD, Dick GM, Swafford A, Chilian WM: Hydrogen peroxide: a feed-forward dilator that couples myocardial metabolism to coronary blood flow. Arterioscler Thromb Vasc Biol. 2006 Dec;26(12):2614-21. Epub 2006 Oct 5.

METHODS AND RESULTS: The production of O2*- is coupled to oxidative metabolism because inhibition of complex I (rotenone) or III (antimycin) enhanced the production of O2*- during pacing by about 50% and 400%, respectively; whereas uncoupling oxidative phosphorylation by decreasing the protonmotive force with carbonylcyanide-p-trifluoromethoxyphenyl-hydrazone (FCCP) decreased pacing-induced O2*- production.
Aliquots of buffer from paced myocytes produced vasodilation of isolated arterioles (peak response 67+/-8% percent of maximal dilation) that was significantly reduced by catalase (5+/-0.5%, P <0.05) or the antagonist of Kv channels, 4-aminopyridine (18+/-4%, P <0.05).
1(0,0,0,1) Details
20089711 Zoer B, Cogolludo AL, Perez-Vizcaino F, De Mey JG, Blanco CE, Villamor E: Hypoxia sensing in the fetal chicken femoral artery is mediated by the mitochondrial electron transport chain. Am J Physiol Regul Integr Comp Physiol. 2010 Apr;298(4):R1026-34. Epub 2010 Jan 20.

The relaxation was enhanced in the presence of the voltage-gated K (+) channel blocker 4-aminopyridine.
Hypoxia-induced relaxation was abolished or significantly reduced by the mETC inhibitors rotenone (complex I), myxothiazol and antimycin A (complex III), and NaN (3) (complex IV).
1(0,0,0,1) Details
18445136 Kilbride SM, Telford JE, Tipton KF, Davey GP: Partial inhibition of complex I activity increases Ca-independent glutamate release rates from depolarized synaptosomes. J Neurochem. 2008 Jul;106(2):826-34. Epub 2008 Apr 28.

Following a 40% inhibition of complex I activity with rotenone, it was found that Ca (2+)-independent release of glutamate increased from synaptosomes depolarized with 4-aminopyridine.
37(0,1,1,7) Details