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Use of the Anabolic Steroid Nandrolone Decanoate Associated to Strength Training in Wistar Rats

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Use of the Anabolic Steroid Nandrolone Decanoate Associated to Strength Training in Wistar Rats Acta Scientiarum http://www.uem.br/acta ISSN printed: 1679-9283 ISSN on-line: 1807-863X Doi: 10.4025/actascibiolsci.v35i2.15513 Use of the anabolic steroid nandrolone decanoate associated to strength training in Wistar rats Leonardo Vidal Andreato1,2*, João Victor Del Conti Esteves1,3, Felipe Natali Almeida1,3, Tatiane Aparecida da Silva Ribeiro1, Helenton Cristhian Barrena1, Sidney Barnabé Peres1 and Solange 1 Marta Franzói de Moraes 1Laboratório de Fisiologia do Esforço, Departamento de Ciências Fisiológicas, Universidade Estadual de Maringá, Maringá, Paraná, Brasil. 2Departamento de Esporte, Escola de Educação Física e Esporte, Universidade de São Paulo, São Paulo, São Paulo, Brasil. 3Instituto de Ciências Biomédicas, Departamento de Fisiologia e Biofísica, Universidade de São Paulo, São Paulo, São Paulo, Brasil. *Autor para correspondência. E-Mail: [email protected] ABSTRACT. Anabolic steroids have been constantly used among athletes and physically active individuals. Adverse effects of such use are reported in the literature. However, little is known about the effects of anabolic steroid use associated with strength training. Thus, this research aimed to identify possible morphophysiological alterations in Wistar rats treated with the anabolic steroid nandrolone decanoate and submitted to strength training. Twenty Wistar rats were divided in four groups: sedentary control (SC), sedentary hormone (SH), trained control (TC) and trained hormone (TH). After the experimental protocol period, animals were killed and body weight, adiposity, renal and hepatic injury markers, plasmatic lipid profile, glycemia, and insulinemia were determined. The experimental conditions strength training and nandrolone decanoate (isolated or associated) were positively correlated to a reduction on visceral and subcutaneous adipose tissue. The association of strength training with nandrolone decanoate was the most effective condition to increase muscle mass. Heart and kidneys weights, aspartate aminotransferase (AST) and high density lipoprotein (HDL) concentration were also negatively modified. The data demonstrated effects of anabolic steroids in body composition, with better results when associated with strength training, but collateral effects were observed. Keywords: anabolic steroids, nandrolone decanoate, strength training. Uso do esteróide anabólico decanoato de nandrolona associado ao treinamento de força em ratos Wistar RESUMO. Os esteróides anabólicos são usados indiscriminadamente entre atletas e praticantes de atividades físicas sendo que os efeitos adversos desse uso constam na literatura. Contudo, pouco se sabe dos efeitos do uso de esteróides anabólicos associados ao treinamento de força. Assim, este estudo objetivou identificar possíveis alterações morfofisiológicas em ratos Wistar tratados com decanoato de nandrolona e submetidos ao treinamento de força. Para atingir tal propósito, vinte ratos Wistar foram divididos em quatro grupos: sedentário controle (SC), sedentário hormônio (SH), treinado controle (TC) e treinado hormônio (TH). Após o período experimental, foram analisados o peso corporal, a adiposidade, marcadores de lesões hepáticas e renais, o perfil lipídico, a glicemia e a insulinemia. Foram observados efeitos do treinamento de força e do uso de decanoato de nandrolona (isolados ou associados) nos tecidos adiposos viscerais e subcutâneo. A associação de treinamento de força e uso de decanoato de nandrolona foi mais efetiva para aumentar a massa muscular. Os pesos dos rins e coração, e concentrações de aspartato aminotransferase (AST) e lipoproteína de alta densidade (HDL) foram negativamente modificados. Os dados demonstram efeitos do esteróide anabólico sobre a composição corporal, com melhores resultados obtidos com a associação ao treinamento de força, contudo efeitos colaterais foram observados. Palavras-chave: anabolizantes, decanoato de nandrolona, treinamento de força. Introduction which has also been synthetically produced and used Steroid hormones are derived from cholesterol for medical therapy (HANDELSMAN, 2001). From and metabolic precursors produced by the adrenal a historical perspective, german soldiers in World cortex and gonads (HÄKKINEN et al., 2001). War II did the first non-medical use of anabolic Belonging to this class of hormone is testosterone, a steroids in order to boost aggression (FULLER, molecule with anabolic and androgenic properties, 1993). It was later discovered that these substances Acta Scientiarum. Biological Sciences Maringá, v. 35, n. 2, p. 283-291, Apr.-June, 2013 284 Andreato et al. could facilitate the growth of skeletal muscle in associated to physical exercise, for 42 days caused laboratory animals, leading to the abusive use of body weight gain and a raise in total cholesterol. In these compounds (NIDA, 2007). addition to, they also observed a moderate increase Currently, the non-medical use of anabolic on heart weight, cardiac hypertrophy and evidence steroids has reached alarming proportions, affecting of myocardial lesions. other population segments, as health club users and However, animal model research that combined even high school students (MAHARAJ et al., 2000; exercise and anabolic steroids have adopted the YESALIS; BAHRKE, 2000). It is estimated that 3% aerobic or anaerobic exercise on treadmill or water of young population in United States have already (GEORGIEVA; BOYADJIEV, 2004). Using the used steroids, and about 3.5 million Americans were apparatus proposed by Tamaki et al. (1992), which users of anabolic steroids (EKLÖF et al., 2003). In allows animals to reproduce the squat weight-lifting Brazil, the percentage of anabolic steroid users on training, we proposed to analyze the school is about 2% (VENÂNCIO et al., 2010). supraphysiological effects of nandrolone decanoate The use of steroids usually occurs in use in association to strength training on body supraphysiological doses, and the dose used composition, lipid and glucose homeostasis, liver associated or not to exercise, is approximately forty and renal injury markers and strength gain in adult times more than the baseline and twenty times the male rats. therapeutic use (EVANS, 2004). This abuse has Material and methods resulted in liver (SCHUMACHER et al., 1999), kidney (YOSHIDA et al., 1994), and coronary Animals and experimental procedures problems (DO CARMO et al., 2011; FERRERA The sample consisted of 20 male 4-month-old et al., 1997), psychological disorders (COWART, Wistar rats that were provided by the Central 1987; SU et al., 1993), hair and clitoris growth, Animal Facilities, State University of Maringá. They menstrual disorders and male voice in women were given a balanced diet and water ad libitum, kept (STRAUSS et al., 1985), and gynecomastia, acne on light/dark cycle of 12/12h. The animals were and baldness in men (PARKINSON; EVANS, randomly divided into four groups: (1) sedentary 2006; HARTGENS; KUIPERS, 2004). control (SC); (2) sedentary hormone, treated with According to the National Institute on Drug nandrolone decanoate (SH); (3) trained control Abuse (NIDA, 2000), nandrolone is one of the most (TC); (4) trained hormone, treated with nandrolone used anabolic derivative of testosterone, because of decanoate (TH). its moderate androgenic potential associated with The entire experimental protocol that involved the good anabolic properties. Furthermore, the use the use of animals was approved by the Ethics of nandrolone decanoate has been applied for Committee for Animal Research at the State therapeutic purposes, and has been effective, for University of Maringá, and was conducted in accordance with the institutional and national example, to reduce loss of body mass and muscle in guidelines for the care and use of animals HIV patients (SAHA et al., 2009), increase the (028/2011). number of satellite cells per muscle fiber (ALLOUH; ROSSER, 2010) and control of Anabolic steroid refractory anemia (CHAWLA et al., 2009). The SH and TH groups received intramuscular In contrast, the deleterious effects of nandrolone nandrolone decanoate (Deca-Durabolin®; Organon decanoate improper use have also been found. of Brazil LTDA, São Paulo State, Brazil) in a dose of Shokri et al. (2010) reported that physical training 10 mg kg-1 week-1 (two applications 5 mg kg-1 associated to the nandrolone decanoate utilization week-1) during 4 weeks. The weekly dose used in for eight weeks has affected fertility of rats, as well as the study protocol was similar to that used in earlier generate testicular atrophy. Additionally, the use for researches (NORTON et al., 2000; TRIFUNOVIC a long period (more than three months) of et al., 1995; WOODIWISS et al., 2000), and it is nandrolone decanoate may affect the cardiovascular equivalent to the rates of abuse often applied by system by decreasing the myocardial contractile athletes. capacity (NORTON et al., 2000), as well as generate increased left ventricular wall (WOODIWISS et al., Strength exercise training 2000) and ventricular morphological changes For the strength exercise protocol, a squat (MEDEI et al., 2010). In addition, Fineschi et al. apparatus was made and adapted from the model (2011) showed that decanoate supplementation proposed by Tamaki et al. (1992), which simulated Acta Scientiarum. Biological Sciences Maringá, v. 35, n. 2, p. 283-291, Apr.-June, 2013 Use of the anabolic steroid nandrolone decanoate in Wistar rats 285 the execution of the squat. The animals were Table 1. Body weight, initial and final fat weight (g), periepididymal, -1 submitted
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