Abstract
Dietary manipulations involving high carbohydrate feeding increase VI cardiac myosin isoform expression in hormonally deficient rats. The purpose of this study was to determine if extremes in dietary carbohydrate availability could alter cardiac myosin isoform patterns in normal weanling and adult rats. Three and six weeks of dietary manipulations (either high or low carbohydrate diets) failed to change calcium-activated myofibril ATPase activity, calcium regulated myofibril ATPase activity, or the myosin isoform distribution in the adult. In contrast, a four week, high carbohydrate diet reduced calcium activated myosin ATPase activity by 33%, calcium regulated myofibril ATPase activity by 10%, and Vl isoform expression by 66% in weanling rats. Although the low carbohydrate diet caused no change in the myosin ATPase properties, it decreased VI isoform expression by 17%. These results show that carbohydrate availability can alter cardiac myosin isoform expression in normal rats, but only at weanling age. The reason for this age-related contrast in response to dietary manipulations is unknown at this stage. The dietary manipulations may have acted directly on the heart by creating a state of malnutrition, or indirectly, by altering some developmental process which links maturation of the sympathetic nervous system with myosin isoform expression.
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Hoh JFY, McGrath PA, Hale PT Electrophoretic analysis of multiple forms of cardiac myosin: effect of hypophysectomy and thyroxine replacement. J Mol Cell Cardiol 10:1053–1076, 1978.
Hoh JFY, Yeoh GPS, Thomas MAW, Higginbottom L: Structural differences in the heavy chains of rat ventricular myosin isoenzymes. FEBS Letters 97:330–334, 1979
Mahadavi V, Periasamy M, Nadal-Ginard B: Molecular characterization of two myosin heavy chain genes expressed in adult heart. Nature 291:659–664, 1982
Lompre AM, Mercadier JJ, Wisenewsky C, Bouveret P, Pantaloni C, D'Albis A, Schwartz K: Species- and age- dependent changes in the relative amounts of cardiac myosin isoenzymes in mammals. Dev Biol 84:286–290, 1981
Capasso JM, Malhotra A, Scheuer J, Sonnenblick EH: Myocardial biochemical, contractile, and electrical performance and imposition of hypertension in young and old rats. Circ Res 58:445–460, 1986
Chizzonite RA, Zak R: Regulation of myosin isoenzyme composition in fetal and neonatal rat ventricle by endogenous thyroid hormones. J Biol Chem 259:12628–12632, 1984
Isumo S, Nadal-Ginard B, Mahadavi V: All members of the MHC multigene family respond to thyroid hormone id a highly tissue-specific manner. Science 231:597–600, 1986
Fein FS, Malhotra A, Miller-Green B, Scheuer J, Sonnenblick EH: Diabetic cardiomyopathy in rats: mechanical and biochemical response to different insulin doses. Am J Physiol 247:H817-H823, 1984
Dillmann WH: Influence of thyroid hormone administration on myosin ATPase activity and myosin isoenzyme distribution in the heart of diabetic rats. Metabolism 31:199–204, 1982
Garber DW, Everett AW, Neely JR: Cardiac function and myosin ATPase in diabetic rats treated with insulin, T3 and T4. Am J Physiol 244:H592-H598, 1983
Dillmann WH: Myosin isoenzyme distribution and calcium activated myosin ATPase activity in the rat heart is influenced by fructose feeding and triiodothyronine. Endocrinology 116:2160–2166, 1985
Sheer D, Morkin E: Myosin isoenzyme expression in rat ventricles: effects of thyroid hormone analogs, catacholamine, glucocorticoids, and high carbohydrate diet. J Pharm Exptl Therapeutics 229:872–879, 1984
Dillmann WH: Methyl palmoxirate increases calcium myosin ATPase acivity and changes myosin isoenzymes distribution in the diabetic rat heart. Am J Physiol 248:E602-E606, 1985
American Institute of Nutrition: Report of the AIN Ad Hoc Committee on standards for nutritional studies. J Nutr 107:1340–1348, 1977
Solaro RJ, Pang DC, Briggs FN: The purification of cardiac myofibrils with Triton X-100. Biochim Biophys Acta 245:259–262, 1971
Gornall AG, Bardawill CJ, David MM: Determination of the serum proteins by the Biuret method. J Biol Chem 177:751–756, 1949
Tibbits GF, Barnard RJ, Baldwin KM, Cugalj N, Roberts NK: Influence of exercise on excitation-contraction coupling in rat myocardium. Am J Physiol 240:H472-H480, 1981
Fisk CH, Subarrow YJ: The colorometric determination of phorphorus. J Biol Chem 66:374–400, 1925
Srere PA: Citrate synthase.Methods Enzymol 13:3–5, 1969
Raabo E, Terkildsen TC: On the enzymatic determination of blood glucose. Scand J Clin Lab Invest 12:402, 1960
Baldwin KM, Campbell PJ, Hooker AM, Lewis RE: Effects of thyroid deficiency and sympathectomy on cardiac enzymes. Am J Physiol 236:C30-C34, 1979
Baldwin KM, Campbell PJ, Hooker AM, Lewis RE: Enzyme changes in neonatal skeletal muscle: effect of thyroid deficiency. Am J Physiol 235:C97-C102, 1978
Dillmann WH: Diabetes mellitus induces changes in cardiac myosin of the rat. Diabetes 29:579–582, 1980
Walker P, Dubois JB, Dussault JH: Free thyroid hormone concentrations during postnatal development in the rat. Pediatr Res 14:247–249, 1980
Dowell RT, Martin AF: Perinatal nutritional modification of weanling rat heart contractile protein. Am J Physiol 247:H967-H972, 1984
Samuel JL, Rapparot L, Syrovy I, Wisnewsky C, Marotto F, Whalen RG, Shwartz K: Differential effect of thyroxine on atrial and ventricular isomyosins in rats. Am J Physiol 250:H333-H341, 1986
Martin AF, Robinson DC, Dowell RT: Isomyosin and thyroid hormone levels in pressure-overloaded weanling and adult rat hearts. Am J Physiol 248:H305-H310, 1985
Lompre AM, Schwartz K, D'Albis A, Lacombe G, Thiem NV, Swynghedauw B: Myosin isoenzyme redistribution in chronic heart overload. Nature 282:105–107, 1979
Dillmann WH, Berry S, Alexander NM: A physiological dose of triiodothyronine normalized cardiac myosin adenosine triphosphatase activity and changed myosin isoenzyme distribution in semistarved rats. Endocrinology 112:2081–2087, 1983
MacIntosh AM, Mullin WM, Fitzsimmons DP, Herrick RE, Baldwin KM: Cardiac biochemical adaptations to exercise in sympathectomized neonatal rats. J Appl Physiol 60:991–996, 1986
Burger AG, Burger M, Wimpheimer K, Danforth Jr E: Interrelationships between energy metabolism and thyroid hormone metabolism during starvation in the rat. Acta Endocrinol 93:322–331, 1980
Rothwell NJ, Saville ME, Stock MJ: Sympathetic and thyroid influences on metabolic rate in fed, fasted, and refed rats. Am J Physiol 243:R339-R346, 1982
Sreter FA, Faris R, Balogh I, Somogyi E, Sotonyi P: Changes in myosin isoenzyme distribution induced by low doses of isoproterenol. Arch Int Pharmacodyn 260:159–164, 1982
Pauletto P, Libera LD, Vescovo G, Scanapiecco G, Angelini A, Passina AC, Palu CD: Propranolol- induced changes in ventricular isomyosin composition in the rat. Am Heart J 109:1269–1273, 1985
Bareis DL, Morgan RE, Lau C, Slotkin TA: Maturation of sympathetic neurotransmission in the rat heart. IV. Effects of guanethidine-induced sympathectomy on neonatal development of synaptic vesicles, synaptic terminal function, and heart growth. Dev Neurosci 4:15–24, 1981
Deskin R, Mills E, Whitmore WL, Seidler FJ, Slotkin TA: Maturation of sympathetic neurotransmission in the rat heart. VI. The effect of neonatal central catecholaminergic lesions. J Pharm Exptl Therapeutics 215:342–347, 1980
Landsberg L, Young JB: Fasting, feeding and regulation of the sympathetic nervous system. N Engl J Med 298:1295–1301, 1978
Vander Tuig JG, Romsos DR: Effects of dietary carbohydrate, fat, and protein on norepinephrine turnover in rats. Metabolism 33:26–33, 1984
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Morris, G.S., Haddad, F. & Baldwin, K.M. Differential effects of carbohydrate intake on cardiac myosin isoform expression in normal weanling and adult rats. Mol Cell Biochem 78, 121–129 (1987). https://doi.org/10.1007/BF00229686
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DOI: https://doi.org/10.1007/BF00229686