Summary
The purpose of the present study was to investigate the relationship between plasma carnitine concentration and body composition variation in relation to muscular and fat masses since there is no experimentally proved correlation between plasma carnitine and body masses. We used bioelectric impedance analysis (BIA), to determine body composition and to have a complete physical fitness evaluation. The post-absorptive plasma free carnitine and acetyl carnitine plasma levels, body composition as Fat-Free Mass (FFM) and Fat Mass (FM) in kg, as well as in percent of body mass, were analysed in 33 healthy subjects. A significant negative correlation was found between plasma acetyl carnitine and FFM in weight (kg) as well as in percent of body mass (respectively p < 0.0001; p < 0.01); a significant positive correlation was found only between FM in percent and plasma acetyl carnitine (p < 0.01). The observed negative correlation between plasma acetyl carnitine and muscular mass variation might reflect an oxidative metabolic muscle improvement in relation to muscular fat free mass increment and might be evidence that muscle metabolism change is in relation to plasma acetyl carnitine concentration.
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Amodio P, Angeli P, Merkel C, Menon F, Gatta A (1990) Plasma carnitine levels in liver cirrhosis: relationship with nutritional status and liver damage. J Clin Chem Clin Biochem 28: 619–626
Arenas J, Ricoy JR, Encinas AR, Pola P, D'Iddio S, Zeviani M, Didonato S, Corsi M (1991) Carnitine in muscle, serum, and urine of nonprofessional athletes: effects of physical exercise, training, and L-carnitine administration. Muscle and Nerve 14: 598–604
Boulat O, Janin B, Francioli P, Bachmann C (1993) Plasma carnitines: reference values in an ambulatory population. Eur J Clin Chem Clin Biochem 31: 585–589
Brass EP, Hiatt WR (1994) Carnitine metabolism during exercise. Life Sciences 54/19: 1383–1393
Brass EP, Hoppel CL, Hiatt WR (1994) Effect of intravenous L-carnitine on carnitine homeostasis and fuel metabolism during exercise in humans. Clin Pharmacol Ther 55: 681–692
Bremer J (1990) The role of carnitine in intracellular metabolism. J Clin Chem Clin Biochim 28: 297–301
Brooks DE, McIntosh JEA (1975) Turnover of carnitine by rat tissues. Biochem J 148: 439–445
Cederblad G, Lindstedt S, Lundholm K (1974) Concentration of carnitine in human muscle tissue. Clin Chim Acta 53: 311–321
Cederblad G, Bylund AC, Holm J, Scherste NT (1976) Carnitine concentration in relation to enzyme activities and substrate utilization in human skeletal muscles. Scand J Clin Lab Invest 36: 547–552
Cerretelli P, Marconi C (1990) L-carnitine supplementation in humans. The effects on physical performance. Int J Sports Med 11/1: 1–14
De Palo EF, Metus P, Gatti R, Previti O, Bigon L, De Palo CB (1993) Branched chain amino acids chronic treatment and muscular exercise performance in athletes: a study through plasma acetyl-carnitine levels. Amino Acids 4: 255–266
Engel AG, Rebouche CJ (1984) Carnitine metabolism and inborn errors. J Inher Metab Dis 7/S1: 38–43
Guder WG, Wagner S (1990) The role of the kidney in carnitine metabolism. J Clin Chem Clin Biochem 28: 347–350
Harper P, Wadström C, Backman L, Cederblad G (1995) Increased liver carnitine content in obese women. Am J Clin Nutr 61: 18–25
Heyward VH (1996) Evaluation of body composition. Sports Med 22/3: 146–156
Hiatt WR, Regensteiner JG, Hargarten ME, Wolfel EE, Brass EP (1990) Benefit of exercise conditioning for patients with peripheral arterial disease. Circulation 81: 602–609
Hiatt WR, Regensteiner JG, Wolfel EE, Carry MR, Brass EP (1996) Effect of exercise training on skeletal muscle histology and metabolism in peripheral arterial disease. J Appl Physiol 81/2: 780–788
Kabir I, Malek MA, Rahman MM, Khaled MA, Mahalanabis D (1994) Changes in body composition of malnourished children after dietary supplementation as measured by bioelectrical impedance. Am J Clin Nutr 59: 5–9
Lambert ME, Shipley K, Holbrook I, Faragher EB, Irving MH (1988) Serum carnitine levels in normal individuals. J Parent and Enteral Nutrition 12: 143–146
Leiter LA, Lukaskil HC, Kenny DJ, Barnie A, Camelon K, Ferguson RS, MacLean S, Simkins S, Zinman B, Cleary PA (1994) The use of bioelectrical impedance analysis (BIA) to estimate body composition in the diabetes control and complications trial (DCCT) Int J Obesity 18: 829–835
Lukaski HC, Johnson PE, Bolonchuk WW, Lykken GI (1985) Assessment of fat-free mass using bioelectrical impedance measurements of the human body. Am J Clin Nutr 41: 810–817
Rabeneck L, Risser MH, Crane MM, McCabe BK, Worsley JB (1993) A comparison of anthropometry and bioelectrical impedance in the estimation of body composition in HIV-infected individuals. Nutrition Res 13: 275–285
Rebouche CJ, Lombard KA, Chenard CA (1993) Renal adaptation to dietary carnitine in humans. Am J Clin Nutr 58: 660–665
Royall D, Greenberg GR, Allard JP, Baker JP, Harrison JE, Jeejeebhoy KN (1994) Critical assessment of body-composition measurements in malnourished subjects with Crohn's disease: the role of bioelectrical impedance analysis. Am J Clin Nutr 59: 325–330
Schols AMWJ, Wouters EFM, Soeters PB, Westerterp KP (1991) Body composition by bioelectrical impedance analysis compared to deuterium dilution and skinfold anthropometry in patients with chronic obstructive pulmonary disease. Am J Clin Nutr 53: 421–424
Siliprandi N, di Lisa F, Vecchiet L (1992) Effect of exogenous on muscle metabolism: a reply to Hultman et al. (1991). Eur J Appl Physiol 64: 278
Spagnoli LG, Palmieri G, Mauriello A, Vacha GM, D'Iddio S, Giorcelli G, Corsi M (1990) Morphometric evidence of the trophic effect of L-carnitine on human skeletal muscle. Nephron 55: 16–23
Stadler DD, Chenard CA, Rebouche CJ (1993) Effect of dietary macronutrient content on carnitine excretion and efficiency of carnitine reabsorption. Am J Clin Nutr 58: 868–872
Starling RD, Costill DL, Fink WJ (1995) Relationships between muscle carnitine, age and oxidative status. Eur J Appl Physiol 71: 143–146
Trappe SW, Costill DL, Goodpaster B, Vukovich MD, Fink WJ (1994) The effects of Lcarnitine supplementation on performance during interval swimming. Int J Sports Med 15/4: 181–185
Vukovich MO, Costill DL, Fink WJ (1994) Carnitine supplementation: effect on muscle carnitine and glycogen content during exercise. Med Sci Sports Exerc 26/9: 1122–1129
Wyss V, Ganzit GP, Rienzi A (1990) Effects of L-carnitine administration on VO2max and the aerobic-anaerobic threshold in normoxia and acute hypoxia. Eur J Appl Physiol 60: 1–6
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Gatti, R., De Palo, C.B., Spinella, P. et al. Free carnitine and acetyl carnitine plasma levels and their relationship with body muscular mass in athletes. Amino Acids 14, 361–369 (1998). https://doi.org/10.1007/BF01318855
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DOI: https://doi.org/10.1007/BF01318855