Abstract
Connexin 43 (Cx43) is the predominant protein forming gap junctions and non-junctional hemichannels in ventricular myocardium, but Cx43 is also localized at the inner membrane of cardiomyocyte mitochondria. In cardiomyocytes, Cx43 is involved in the formation of reactive oxygen species, which are central to the signal transduction cascade of ischemic preconditioning’s protection. Accordingly, genetically-induced or age-related loss of Cx43 abolishes infarct size reduction by ischemic preconditioning. Similarly, mitochondrial import inhibition of Cx43 completely blocks infarct size reduction by pharmacological preconditioning with diazoxide. In contrast to its importance for preconditioning-induced cardioprotection, Cx43 is not important for infarct size reduction by ischemic postconditioning. In summary, Cx43––especially Cx43 localized in mitochondria––appears to be one key element of the signal transduction cascade of the protection by preconditioning.
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References
Sohl G, Willecke K (2004) Gap junctions and the connexin protein family. Cardiovasc Res 62:228–232
van Veen TA, van Rijen HV, Jongsma HJ (2006) Physiology of cardiovascular gap junctions. Adv Cardiol 42:18–40
Delmar M, Coombs W, Sorgen P, Duffy HS, Taffet SM (2004) Structural bases for the chemical regulation of connexin43 channels. Cardiovasc Res 62:268–275
King TJ, Lampe PD (2005) Temporal regulation of connexin phosphorylation in embryonic and adult tissues. Biochim Biophys Acta 1719:24–35
Veenstra RD, Wang HZ, Beblo DA et al (1995) Selectivity of connexin-specific gap junctions does not correlate with channel conductance. Circ Res 77:1156–1165
Saez JC, Berthoud VM, Branes MC, Martinez AD, Beyer EC (2003) Plasma membrane channels formed by connexins: their regulation and functions. Physiol Rev 83:1359–1400
Spray DC, Burt JM (1990) Structure-activity relations of the cardiac gap junction channel. Am J Physiol 258:C195–C205
Quist AP, Rhee SK, Lin H, Lal R (2000) Physiological role of gap-junctional hemichannels. Extracellular calcium-dependent isosmotic volume regulation. J Cell Biol 148:1063–1074
De MA, Vega VL, Contreras JE (2002) Gap junctions, homeostasis, and injury. J Cell Physiol 191:269–282
Plotkin LI, Manolagas SC, Bellido T (2002) Transduction of cell survival signals by connexin-43 hemichannels. J Biol Chem 277:8648–8657
Saez JC, Retamal MA, Basilio D, Bukauskas FF, Bennett MV (2005) Connexin-based gap junction hemichannels: gating mechanisms. Biochim Biophys Acta 1711:215–224
Schulz R, Heusch G (2004) Connexin 43 and ischemic preconditioning. Cardiovasc Res 62:335–344
Lampe PD, TenBroek EM, Burt JM, Kurata WE, Johnson RG, Lau AF (2000) Phosphorylation of connexin43 on serine368 by protein kinase C regulates gap junctional communication. J Cell Biol 149:1503–1512
Bao X, Reuss L, Altenberg GA (2004) Regulation of purified and reconstituted connexin 43 hemichannels by protein kinase C-mediated phosphorylation of Serine 368. J Biol Chem 279:20058–20066
Ek-Vitorin JF, King TJ, Heyman NS, Lampe PD, Burt JM (2006) Selectivity of connexin 43 channels is regulated through protein kinase C-dependent phosphorylation. Circ Res 98:1498–1505
Giepmans BN (2004) Gap junctions and connexin-interacting proteins. Cardiovasc Res 62:233–245
Akiyama M, Ishida N, Ogawa T, Yogo K, Takeya T (2005) Molecular cloning and functional analysis of a novel Cx43 partner protein CIP150. Biochem Biophys Res Commun 335:1264–1271
Matsuda T, Fujio Y, Nariai T et al (2006) N-cadherin signals through Rac1 determine the localization of connexin 43 in cardiac myocytes. J Mol Cell Cardiol 40:495–502
Schulz R, Gres P, Skyschally A et al (2003) Ischemic preconditioning preserves connexin 43 phosphorylation during sustained ischemia in pig hearts in vivo. FASEB J 17:1355–1357
John SA, Kondo R, Wang SY, Goldhaber JI, Weiss JN (1999) Connexin-43 hemichannels opened by metabolic inhibition. J Biol Chem 274:236–240
Li F, Sugishita K, Su Z, Ueda I, Barry WH (2001) Activation of connexin-43 hemichannels can elevate [Ca(2+)]i and [Na(+)]i in rabbit ventricular myocytes during metabolic inhibition. J Mol Cell Cardiol 33:2145–2155
Vetterlein F, Muhlfeld C, Cetegen C, Volkmann R, Schrader C, Hellige G (2006) Redistribution of connexin43 in regional acute ischemic myocardium: influence of ischemic preconditioning. Am J Physiol Heart Circ Physiol 291:H813–H819
Lampe PD, Cooper CD, King TJ, Burt JM (2006) Analysis of connexin43 phosphorylated at S325, S328 and S330 in normoxic and ischemic heart. J Cell Sci 119:3435–3442
Tansey EE, Kwaku KF, Hammer PE et al (2006) Reduction and redistribution of gap and adherens junction proteins after ischemia and reperfusion. Ann Thorac Surg 82:1472–1479
Beardslee MA, Lerner DL, Tadros PN et al (2000) Dephosphorylation and intracellular redistribution of ventricular connexin43 during electrical uncoupling induced by ischemia. Circ Res 87:656–662
Axelsen LN, Stahlhut M, Mohammed S et al (2006) Identification of ischemia-regulated phosphorylation sites in connexin43: a possible target for the antiarrhythmic peptide analogue rotigaptide (ZP123). J Mol Cell Cardiol 40:790–798
Miura T, Ohnuma Y, Kuno A et al (2004) Protective role of gap junctions in preconditioning against myocardial infarction. Am J Physiol Heart Circ Physiol 286:H214–H221
Jain SK, Schuessler RB, Saffitz JE (2003) Mechanisms of delayed electrical uncoupling induced by ischemic preconditioning. Circ Res 92:1138–1144
Azzam EI, de Toledo SM, Little JB (2001) Direct evidence for the participation of gap junction-mediated intercellular communication in the transmission of damage signals from alpha-particle irradiated to nonirradiated cells. Proc Natl Acad Sci USA 98:473–478
Garcia-Dorado D, Rodriguez-Sinovas A, Ruiz-Meana M (2004) Gap junction-mediated spread of cell injury and death during myocardial ischemia-reperfusion. Cardiovasc Res 61:386–401
Li G, Whittaker P, Yao M, Kloner RA, Przyklenk K (2002) The gap junction uncoupler heptanol abrogates infarct size reduction with preconditioning in mouse hearts. Cardiovasc Pathol 11:158–165
Schwanke U, Konietzka I, Duschin A, Li X, Schulz R, Heusch G (2002) No ischemic preconditioning in heterozygous connexin43-deficient mice. Am J Physiol Heart Circ Physiol 283:H1740–H1742
Schwanke U, Li X, Schulz R, Heusch G (2003) No ischemic preconditioning in heterozygous connexin 43-deficient mice––a further in vivo study. Basic Res Cardiol 98:181–182
Li X, Heinzel FR, Boengler K, Schulz R, Heusch G (2004) Role of connexin 43 in ischemic preconditioning does not involve intercellular communication through gap junctions. J Mol Cell Cardiol 36:161–163
Dang X, Doble BW, Kardami E (2003) The carboxy-tail of connexin-43 localizes to the nucleus and inhibits cell growth. Mol Cell Biochem 242:35–38
Li H, Brodsky S, Kumari S et al (2002) Paradoxical overexpression and translocation of connexin43 in homocysteine-treated endothelial cells. Am J Physiol Heart Circ Physiol 282:H2124–H2133
Boengler K, Dodoni G, Rodriguez-Sinovas A et al (2005) Connexin 43 in cardiomyocyte mitochondria and its increase by ischemic preconditioning. Cardiovasc Res 67:234–244
O’Rourke B (2004) Evidence for mitochondrial K+ channels and their role in cardioprotection. Circ Res 94:420–432
Halestrap AP, Clarke SJ, Javadov SA (2004) Mitochondrial permeability transition pore opening during myocardial reperfusion––a target for cardioprotection. Cardiovasc Res 61:372–385
Murphy E (2004) Primary and secondary signaling pathways in early preconditioning that converge on the mitochondria to produce cardioprotection. Circ Res 94:7–16
Boengler K, Gres P, Cabestrero A et al (2006) Prevention of the ischemia-induced decrease in mitochondrial Tom20 content by ischemic preconditioning. J Mol Cell Cardiol 41:426–430
Rodriguez-Sinovas A, Boengler K, Cabestrero A et al (2006) Translocation of connexin 43 to the inner mitochondrial membrane of cardiomyocytes through the heat shock protein 90-dependent TOM pathway and its importance for cardioprotection. Circ Res 99:93–101
Lefer DJ, Granger DN (2000) Oxidative stress and cardiac disease. Am J Med 109:315–323
Schulz R, Cohen MV, Behrends M, Downey JM, Heusch G (2001) Signal transduction of ischemic preconditioning. Cardiovasc Res 52:181–198
Yellon DM, Downey JM (2003) Preconditioning the myocardium: from cellular physiology to clinical cardiology. Physiol Rev 83:1113–1151
Pain T, Yang XM, Critz SD et al (2000) Opening of mitochondrial K(ATP) channels triggers the preconditioned state by generating free radicals. Circ Res 87:460–466
Heinzel FR, Luo Y, Li X et al (2005) Impairment of diazoxide-induced formation of reactive oxygen species and loss of cardioprotection in connexin 43 deficient mice. Circ Res 97:583–586
Tsang A, Hausenloy DJ, Mocanu MM, Yellon DM (2004) Postconditioning: a form of “modified reperfusion” protects the myocardium by activating the phosphatidylinositol 3-kinase-Akt pathway. Circ Res 95:230–232
Bopassa JC, Ferrera R, Gateau-Roesch O, Couture-Lepetit E, Ovize M (2006) PI 3-kinase regulates the mitochondrial transition pore in controlled reperfusion and postconditioning. Cardiovasc Res 69:178–185
Darling CE, Jiang R, Maynard M, Whittaker P, Vinten-Johansen J, Przyklenk K (2005) Postconditioning via stuttering reperfusion limits myocardial infarct size in rabbit hearts: role of ERK1/2. Am J Physiol Heart Circ Physiol 289:H1618–H1626
Yang XM, Philipp S, Downey JM, Cohen MV (2005) Postconditioning’s protection is not dependent on circulating blood factors or cells but involves adenosine receptors and requires PI3-kinase and guanylyl cyclase activation. Basic Res Cardiol 100:57–63
Heusch G, Buchert A, Feldhaus S, Schulz R (2006) No loss of cardioprotection by postconditioning in connexin 43-deficient mice. Basic Res Cardiol 101:354–356
Kin H, Zhao ZQ, Sun HY et al (2004) Postconditioning attenuates myocardial ischemia-reperfusion injury by inhibiting events in the early minutes of reperfusion. Cardiovasc Res 62:74–85
Kin H, Zatta AJ, Lofye MT et al (2005) Postconditioning reduces infarct size via adenosine receptor activation by endogenous adenosine. Cardiovasc Res 67:124–133
Tang XL, Sato H, Tiwari S et al (2006) Cardioprotection by postconditioning in conscious rats is limited to coronary occlusions <45 minutes. Am J Physiol Heart Circ Physiol 291:H2308–H2317
Zatta AJ, Kin H, Lee G et al (2006) Infarct-sparing effect of myocardial postconditioning is dependent on protein kinase C signalling. Cardiovasc Res 70: 315–324
Yang XM, Proctor JB, Cui L, Krieg T, Downey JM, Cohen MV (2004) Multiple, brief coronary occlusions during early reperfusion protect rabbit hearts by targeting cell signaling pathways. J Am Coll Cardiol 44:1103–1110
Argaud L, Gateau-Roesch O, Raisky O, Loufouat J, Robert D, Ovize M (2005) Postconditioning inhibits mitochondrial permeability transition. Circulation 111:194–197
Chiari PC, Bienengraeber MW, Pagel PS, Krolikowski JG, Kersten JR, Warltier DC (2005) Isoflurane protects against myocardial infarction during early reperfusion by activation of phosphatidylinositol-3-kinase signal transduction: evidence for anesthetic-induced postconditioning in rabbits. Anesthesiology 102:102–109
Couvreur N, Lucats L, Tissier R, Bize A, Berdeaux A, Ghaleh B (2006) Differential effects of postconditioning on myocardial stunning and infarction: a study in conscious dogs and anesthetized rabbits. Am J Physiol Heart Circ Physiol 291:H1345–H1350
Philipp S, Yang XM, Cui L, Davis AM, Downey JM, Cohen MV (2006) Postconditioning protects rabbit hearts through a protein kinase C-adenosine A2b receptor cascade. Cardiovasc Res 70:308–314
Zhao ZQ, Corvera JS, Halkos ME et al (2003) Inhibition of myocardial injury by ischemic postconditioning during reperfusion: comparison with ischemic preconditioning. Am J Physiol Heart Circ Physiol 285:H579–H588
Halkos ME, Kerendi F, Corvera JS et al (2004) Myocardial protection with postconditioning is not enhanced by ischemic preconditioning. Ann Thorac Surg 78:961–969
Iliodromitis EK, Georgiadis M, Cohen MV, Downey JM, Bofilis E, Kremastinos DT (2006) Protection from postconditioning depends on the number of short ischemic insults in anesthetized pigs. Basic Res Cardiol 101:502–507
Staat P, Rioufol G, Piot C et al (2005) Postconditioning the human heart. Circulation 112:2143–2148
Valen G, Vaage J (2005) Pre- and postconditioning during cardiac surgery. Basic Res Cardiol 100:179–186
Vinten-Johansen J, Yellon DM, Opie LH (2005) Postconditioning: a simple, clinically applicable procedure to improve revascularization in acute myocardial infarction. Circulation 112:2085–2088
Kloner RA, Rezkalla SH (2006) Preconditioning, postconditioning, their application to clinical cardiology. Cardiovasc Res 70:297–307
Ramzy D, Rao V, Weisel RD (2006) Clinical applicability of preconditioning, postconditioning: the cardiothoracic surgeons’s view. Cardiovasc Res 70:174–180
Yellon DM, Opie LH (2006) Postconditioning for protection of the infarcting heart. Lancet 367:456–458
Fantinelli JC, Mosca SM (2007) Comparative effects of ischemic pre and postconditioning on ischemia-reperfusion injury in spontaneously hypertensive rats (SHR). Mol Cell Biochem 296:45–51
Heusch G (2004) Postconditioning: old wine in a new bottle? J Am Coll Cardiol 44:1111–1112
Tsang A, Hausenloy DJ, Yellon DM (2005) Myocardial postconditioning: reperfusion injury revisited. Am J Physiol Heart Circ Physiol 289:H2–H7
Vinten-Johansen J, Zhao ZQ, Zatta AJ, Kin H, Halkos ME, Kerendi F (2005) Postconditioning––a new link in nature’s armor against myocardial ischemia-reperfusion injury. Basic Res Cardiol 100:295–310
Crisostomo PR, Wairiuko GM, Wang M, Tsai BM, Morrell ED, Meldrum DR (2006) Preconditioning versus postconditioning: mechanisms and therapeutic potentials. J Am Coll Surg 202:797–812
Garcia-Dorado D, Vinten-Johansen J, Piper HM (2006) Bringing preconditioning and postconditioning into focus. Cardiovasc Res 70:167–169
Schwartz LM, Lagranha CJ (2006) Ischemic postconditioning during reperfusion activates Akt and ERK without protecting against lethal myocardial ischemia-reperfusion injury in pigs. Am J Physiol Heart Circ Physiol 290:H1011–H1018
Crisostomo PR, Wang M, Wairiuko GM, Terrell AM, Meldrum DR (2006) Postconditioning in females depends on injury severity. J Surg Res 134:342–347
Hausenloy DJ, Tsang A, Yellon DM (2005) The reperfusion injury salvage kinase pathway: a common target for both ischemic preconditioning and postconditioning. Trends Cardiovasc Med 15:69–75
Hausenloy DJ, Yellon DM (2006) Survival kinases in ischemic preconditioning and postconditioning. Cardiovasc Res 70:240–253
Downey JM, Cohen MV (2005) We think we see a pattern emerging here. Circulation 111:120–121
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The authors’ studies were supported by the German Research Foundation (Schu843/7-1).
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Schulz, R., Boengler, K., Totzeck, A. et al. Connexin 43 in ischemic pre- and postconditioning. Heart Fail Rev 12, 261–266 (2007). https://doi.org/10.1007/s10741-007-9032-3
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DOI: https://doi.org/10.1007/s10741-007-9032-3