Abstract
The present study investigated the effect of alteration in thyroid hormone level on Mg2+ homeostasis in cardiac ventricular myocytes. Hyperthyroid conditions increased cardiac myocytes total Mg2+ content by ~14% as compared to cells from eu-thyroid animals. The excess Mg2+ was localized predominantly within cytoplasm and mitochondria, and was mobilized into the extracellular compartment by addition of isoproterenol (ISO) or cAMP but not phenylephrine (PHE). Hypothyroid conditions, instead, decreased cardiac myocytes total Mg2+ content by ~10% as compared to cells from eu-thyroid animals. Also in this case, cytoplasm and mitochondria were the two cellular pools predominantly affected. Under hypothyroid conditions, administration of ISO or cAMP resulted in a decreased Mg2+ extrusion as compared to that observed in cardiac cells from eu-thyroid animals. Similar changes in cellular Mg2+ content and transport were observed in cardiac ventricular myocytes isolated from hyper- and hypo-thyroid animals, as well as in cultures of H9C2 cells rendered hyper- or hypo-thyroid under in vitro conditions. Supplementation of thyroid hormone to hypothyroid animals restored Mg2+ level and transport to levels comparable to those observed in eu-thyroid animals. Taken together, these results indicate that changes in thyroid hormone level have a major effect on Mg2+ homeostasis and compartmentation in cardiac cells. The enlarged Mg2+ mobilization via β- but not α1-adrenergic receptor stimulation further suggests that β- and α1-adrenergic receptors target selectively different Mg2+ compartments within the cardiac myocyte. These results provide a new rationale to interpret changes in cardiac function under hyper- or hypo-thyroid conditions.
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Abbreviations
- EPXMA:
-
Electron probe X-rays microanalysis
- FCCP:
-
Carbonyl cyanide p-trifluoromethoxy-phenylhydrazone
- ISO:
-
Isoproterenol
- PHE:
-
Phenylephrine
- H+H:
-
Hypo-thyroid + hyper-T3 treatment
References
Gunther T (1986) Functional compartmentation of intracellular magnesium. Magnesium 5:53–59
Romani A, Scarpa A (2000) Regulation of cellular magnesium. Front Biosci 5:D720–D734. doi:10.2741/Romani
Wolf FI, Torsello A, Fasanella S, Cittadini A (2003) Cell Physiology of magnesium. Mol Asp Med 24:11–26. doi:10.1016/S0098-2997(02)00088-2
Scarpa A, Brinley FJ (1981) In situ measurements of free cytosolic magnesium ions. Fed Proc 40:2646–2652
Fatholahi M, LaNoue K, Romani A, Scarpa A (2000) Relationship between total and free cellular Mg2+ during metabolic stimulation of rat cardiac myocytes and perfused hearts. Arch Biochem Biophys 374:395–401. doi:10.1006/abbi.1999.1619
Romani A, Scarpa A (1990) Hormonal control of Mg2+ transport in the heart. Nature 346:841–844. doi:10.1038/346841a0
Vormann J, Gunther T (1987) Amiloride-sensitive net Mg2+ efflux from isolated perfused rat hearts. Magnesium 6:220–224
Romani A, Scarpa A (1990) Norepinephrine evokes a marked Mg2+ efflux from liver cells. FEBS Lett 269:37–40. doi:10.1016/0014-5793(90)81113-3
Fagan TE, Romani A (2000) Activation of Na+- and Ca2+-dependent Mg2+ extrusion by alpha1- and beta-adrenergic agonists in rat liver cells. Am J Physiol 279:G943–G950
Wolf FI, Di Francesco A, Covacci V, Cittadini A (1997) Regulation of magnesium efflux from rat spleen lymphocytes. Arch Biochem Biophys 344:397–403. doi:10.1006/abbi.1997.0199
Flatman PW (1991) Mechanisms of magnesium transport. Annu Rev Physiol 53:259–271. doi:10.1146/annurev.ph.53.030191.001355
Resnick LM, Altura BT, Gupta RK, Laragh JH, Alderman MH, Altura BM (1993) Intracellular and extracellular magnesium depletion in type-II (non-insulin-dependent) diabetes mellitus. Diabetologia 36:767–770. doi:10.1007/BF00401149
Wallach S, Verch R (1987) Tissue magnesium content in diabetic rats. Magnesium 6:302–307
Runyan AL, Sun Y, Bhattacharya SK, Ahokas RA, Chhokar VS, Gerling IC et al (2005) Responses in extracellular and intracellular calcium and magnesium in aldosteronism. J Lab Clin Med 146:76–84. doi:10.1016/j.lab.2005.04.008
Sontia B, Touyz RM (2007) Role of magnesium in hypertension. Arch Biochem Biophys 458:33–39. doi:10.1016/j.abb.2006.05.005
Kahaly GS, Dillmann WH (2005) Thyroid hormone action in the heart. Endocr Rev 26:704–728. doi:10.1210/er.2003-0033
Gupta MP (2007) Factors controlling cardiac myosin-isoform shift during hypertrophy and heart failure. J Mol Cell Cardiol 43:388–403. doi:10.1016/j.yjmcc.2007.07.045
Kim D, Smith TW (1984) Effects of thyroid hormone on sodium pump sites, sodium content, and contractile responses to cardiac glycosides in culture chick ventricular cells. J Clin Invest 74:1481–1488. doi:10.1172/JCI111561
Wolska BM, Averyhart-Fullard V, Omachi A, Stojanovic MO, Kallen RG, Solaro RJ (1997) Changes in thyroid state affect pHi and Na+i homeostasis in rat ventricular myocytes. J Mol Cell Cardiol 29:2653–2663. doi:10.1006/jmcc.1997.0495
Ismail-Beigi F, Edelman IS (1971) The mechanism of the calorigenic action of thyroid hormone. Stimulation of Na + -K + activated adenoinetriphosphatase activity. J Gen Physiol 57:710–722. doi:10.1085/jgp. 57.6.710
Brodie C, Sampson SR (1989) Characterization of thyroid hormone effects on Na channel synthesis in cultured skeletal myotubes: role of Ca2+. Endocrinology 125:842–849
Beekman RE, van Hardeveld C, Simonides WS (1988) Effect of thyroid statue on cytosolic free calcium in resting and electrically stimulated cardiac myocytes. Biochim Biophys Acta 969:18–27. doi:10.1016/0167-4889(88)90083-3
Lomax RB, Cobbold PH, Allshire AP, Cuthbertson KS, Robertson WR (1991) Tri-iodothyronine increases intra-cellular calcium levels in single rat myocytes. J Mol Endocrinol 7:77–79
Queiroz MS, Shao Y, Berkich DA, LaNoue KF, Ismail-Beigi F (2002) Thyroid hormone regulation of cardiac bioenergetics: role of intracellular creatine. Am J Physiol 283:H2527–H2533
Shao Y, Pressley TA, Ismail-Beigi F (1999) Na, K-ATPase mRNA β1 expression in rat myocardium-effect of thyroid status. Eur J Biochem 260:1–8. doi:10.1046/j.1432-1327.1999.00111.x
Cataldo NA, Cooper DS, Chin WW, Maloof F, Ridgway EC (1982) The effect of thyroid hormones on prolactin secretion by cultured bovine pituitary cells. Metabolism 31:589–594. doi:10.1016/0026-0495(82)90097-X
Akerman KE (1981) Inhibition and stimulation of respiration-linked Mg2+ efflux in rat heart mitochondria. J Bioenerg Biomembr 13:133–139. doi:10.1007/BF00763835
Lowry OH, Rosebrough NJ, Farr AL, Randall RJ (1951) Protein measurements with the Folin phenol reagent. J Biol Chem 193:265–275
Fagan TE, Cefaratti C, Romani A (2004) Streptozotocin-induced diabetes impairs Mg2+ homeostasis and uptake in rat liver cells. Am J Physiol 286:E184–E193
Reed G, Cefaratti C, Berti-Mattera LN, Romani A (2008) Lack of insulin impairs Mg2+ homeostasis and transport in cardiac cells of streptozotocin-injected diabetic rats. J Cell Biochem 104:1034–1053
Romani A, Scarpa A (1992) Regulation of cell magnesium. Arch Biochem Biophys 298:1–12. doi:10.1016/0003-9861(92)90086-C
Koss KL, Putnam RW, Grubbs RD (1993) Mg2+ buffering in cultured chick ventricular myocytes: quantitation and modulation by Ca2+. Am J Physiol 264:C1259–C1269
Terasaki M, Rubin H (1985) Evidence that intracellular magnesium is present in cells at a regulatory concentration for protein synthesis. Proc Natl Acad Sci USA 82:7324–7326. doi:10.1073/pnas.82.21.7324
Cech SY, Broaddus WC, Maguire ME (1980) Adenylate cyclase: the role of magnesium and other divalent cations. Mol Cell Biochem 33:67–92. doi:10.1007/BF00224572
Sousa VP, Pinto JR, Sorenson MM (2006) Ionic interventions that alter the association of troponin C C-domain with the thin filaments of vertebrate striated muscle. Biochim Biophys Acta 1760:272–282
Duggleby RC, East M, Lee AG (1999) Luminal dissociation of Ca2+ from the phosphorylated Ca2+-ATPase is sequential and gated by Mg2+. Biochem J 339:351–357. doi:10.1042/0264-6021:3390351
Panov A, Scarpa A (1996) Independent modulation of the activity of alpha-ketoglutarate dehydrogenase complex by Ca2+ and Mg2+. Biochemistry 35:427–432. doi:10.1021/bi952101t
Panov A, Scarpa A (1996) Mg2+ control of respiration in isolated rat liver mitochondria. Biochemistry 35:12849–12856. doi:10.1021/bi960139f
Nakashima RA, Dordick RS, Garlid KD (1982) On the relative roles of Ca2+ and Mg2+ in regulating the endogenous K+/H+ exchanger of rat liver mitochondria. J Biol Chem 257:12540–12545
Goglia F, Silvestri E, Lami A (2001) Thyroid hormone and mitochondria. Biosci Rep 22:17–32. doi:10.1023/A:1016056905347
Wiesenberger G, Waldhorr M, Schweyen RJ (1992) The nuclear gene MRS2 is essential for the excision of group II introns from yeast mitochondrial transcripts in vivo. J Biol Chem 267:6963–6969
Kolisek M, Zsurka G, Samaj J, Weghuber J, Schweyen RJ, Schweigel M (2003) Mrs2p is an essential component of the major electrophoretic Mg2 + influx system in mitochondria. EMBO J 22:1235–1244. doi:10.1093/emboj/cdg122
Romani A (2007) Regulation of magnesium homeostasis and transport in mammalian cells. Arch Biochem Biophys 458:90–102. doi:10.1016/j.abb.2006.07.012
Jakob A, Becker J, Schottli G, Fritzsch G (1989) α1-Adrenergic stimulation causes Mg2+ release from perfused rat liver. FEBS Lett 246:127–130. doi:10.1016/0014-5793(89)80267-4
Levey GS, Epstein SE (1969) Myocardial adenyl cyclase: activation by thyroid hormones and evidence for two adenyl cyclase systems. J Clin Invest 48:1663–1669. doi:10.1172/JCI106131
Maguire ME (1984) Hormone-sensitive magnesium transport and magnesium regulation of adenylate cyclase. Trends Pharmacol Sci 5:73–77. doi:10.1016/0165-6147(84)90372-9
Ririe DG, Butterworth JF, Royster RL, MAcGregor DA, Zaloga GP (1995) Triiodothyronine increases contractility independent of beta-adrenergic receptors or stimulation of cyclic-3’, 5’-adenosine monophosphate. Anesthesiology 82:1004–1012. doi:10.1097/00000542-199504000-00025
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This study was supported by NIH-HL18708 and NIAAA-11593 to Dr. Andrea Romani.
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Ballard, B., Torres, L.M. & Romani, A. Effect of thyroid hormone on Mg2+ homeostasis and extrusion in cardiac cells. Mol Cell Biochem 318, 117–127 (2008). https://doi.org/10.1007/s11010-008-9863-9
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DOI: https://doi.org/10.1007/s11010-008-9863-9