O corpo da nação: posicionamentos governamentais sobre a educação física no Brasil monárquico / The body of the nation: government positions on physical education during tHe Brazilian monarchy

Associadas a projetos de construção da ideia de nação, no Brasil monárquico foram encaminhadas, pelo governo imperial, algumas iniciativas no sentido de materializar propostas de educação física. O objetivo deste artigo é investigar os sentidos e significados atribuídos ao tema na legislação e nos relatórios anuais do Ministério dos Negócios do Império (1831-1889), com especial interesse pelo que se refere ao Rio de Janeiro. A abordagem do assunto nas fontes pesquisadas evidencia que as visões sobre a educação física se deram a partir de uma matriz que articulava concepções de moral, saúde e civilização, tendo que lidar com as condições concretas de um país recém-independente, periférico e com uma burocracia ainda em formação.

In association with its nation building projects, the imperial government in Brazil under monarchic rule took some concrete actions based on proposals for physical education. The aim of this article is to investigate the meanings and significations attributed to this subject in the legislation and the annual reports issued by the Ministry of Business of the Empire (1831-1889), giving special attention to Rio de Janeiro. The approach to the subject in the sources researched demonstrates that the views of physical education took shape through a web of ideas that associated moral, health and civilization conceptions, in a bid to deal with the concrete circumstances of a newly independent peripheral nation with a bureaucratic structure in the process of formation.

Water extracts of cabbage and kale inhibit ex vivo H2O2-induced DNA damage but not rat hepatocarcinogenesis

The chemopreventive potential of water extracts of the Brassica vegetables cabbage and kale was evaluated by administering their aqueous extracts in drinking water ad libitum to Wistar rats submitted to Ito’s hepatocarcinogenesis model (CB group and K group, respectively - 14 rats per group). Animals submitted to this same model and treated with water were used as controls (W group - 15 rats). Treatment with the vegetable extracts did not inhibit (P > 0.05) placental glutathione S-transferase-positive preneoplastic lesions (PNL). The number of apoptotic bodies did not differ (P > 0.05) among the experimental groups. Ex vivo hydrogen peroxide treatment of rat livers resulted in lower (P < 0.05) DNA strand breakage in cabbage- (107.6 ± 7.8 µm) and kale- (110.8 ± 10.0 µm) treated animals compared with control (120.9 ± 12.7 µm), as evaluated by the single cell gel (comet) assay. Treatment with cabbage (2 ± 0.3 µg/g) or kale (4 ± 0.2 µg/g) resulted in increased (P < 0.05) hepatic lutein concentration compared with control (0.5 ± 0.07 µg/g). Despite the absence of inhibitory effects of cabbage and kale aqueous extracts on PNL, these Brassica vegetables presented protection against DNA damage, an effect possibly related to increased hepatic lutein concentrations. However, it must be pointed out that the cause-effect relationship between lutein levels and protection is hypothetical and remains to be demonstrated.

Role of the vitamin C in diethylnitrosamine-induced esophageal cancer in Wistar rats / O efeito inibidor da vitamina C na carcinogênese esofágica induzida pela dietilnitrosamina em ratos Wistar

PURPOSE: To evaluate the inhibitory effect of vitamin C on the experimental esophageal carcinogenesis induced by diethylnitrosamine (NDEA). METHODS: Sixty Wistar male rats aged three months, with mean weight of 210 g were employed in the study and were divided into four different groups according to the drinking drugs: group I - controls: only water, seven days a week; group II - only vitamin C, seven days a week; group III - NDEA, three days a week and water during the other four days; group IV - NDEA, three days a week and vitamin C during the other four days; group V - NDEA together with vitamin C three days a week, and only water during the other four days and group VI - NDEA together with vitamin C three days a week and vitamin C during the other four days. The dosages of NDEA were: - 10 mg. / Kg / day and vitamin C - 200 mg / animal / day, dissolved in drinking water. The animals were observed during 180 days and after that each one was sacrificed and its esophagus and the stomach were removed together and macro and microscopically analyzed to identify any tumors. RESULTS: The largest number of tumors was observed in the group III: 48 macroscopic lesions (4.8 lesions per animal) and 23 microscopic lesions (2.3 lesions per animal). The groups that received vitamin C (groups IV, V and VI) showed smaller number of tumors: group V - 0.5 macroscopic lesions and 0.3 microscopic lesions per animal and group VI - 0.1 macroscopic lesions and 0.1 microscopic lesions per animal. The incidence of tumors in the groups V and VI showed statistical significance (p<0.05), when compared to the other groups. CONCLUSION: The vitamin C administered together with diethylnitrosamine showed an inhibitory effect on the experimental esophageal carcinogenesis in Wistar rats.

OBJETIVO: Avaliar o efeito inibidor da vitamina C na carcinogênese esofágica experimental induzida pela dietilnitrosamina (DEN). MÉTODOS: Sessenta ratos Wistar, com idade de três meses, machos, com peso médio de 210 g foram utilizados no estudo e divididos em quatro grupos diferentes, conforme ingestão das drogas: grupo I - controles: ingerindo água sete dias por semana; grupo II - só vitamina C, sete dias por semana; grupo III - DEN, três dias por semana e água durante os outros quatro dias; grupo IV - DEN, três dias por semana e vitamina C durante os outros quatro dias; grupo V - DEN junto com vitamina C três dias por semana, e água os outros quatro dias e grupo VI - DEN junto com vitamina C três dias por semana e só vitamina C durante os outros quatro dias. As dosagens de DEN empregadas foram - 10 mg. / Kg / dia e de vitamina C - 200 mg / animal / dia, dissolvidos na água de beber. Os animais foram observados durante 180 dias e depois disso sacrificados, tiveram o seu esôfago e o estômago retirados, e macro e microscòpicamente analisados para identificar qualquer tumor. RESULTADOS: O número maior de tumores foi observado no grupo III: 48 lesões macroscópicas (4.8 lesões por animal) e 23 lesões microscópicas (2.3 lesões por animal). Os grupos que receberam vitamina C (grupos IV, V e VI) evidenciaram número menor de tumores: grupo V - 0.5 lesões macroscópicas e 0.3 lesões microscópicas por animal e grupo VI - 0.1 lesões macroscópicas e 0.1 lesões microscópicas por animal. A incidência de tumores nos grupos V e VI mostraram diferença estatística significa (p <0.05), quando comparados aos outros grupos. CONCLUSÃO: A vitamina C administrada junto com dietilnitrosamina mostrou efeito inibidor no aparecimento de tumores esofágicos.

Effects of crude extracts of Agaricus blazei on DNA damage and on rat liver carcinogenesis induced by diethylnitrosamine

The effects of crude extracts of the mushroom Agaricus blazei Murrill (Agaricaceae) on both DNA damage and placental form glutathione S-transferase (GST-P)-positive liver foci induced by diethylnitrosamine (DEN) were investigated. Six groups of adult male Wistar rats were used. For two weeks, animals of groups 3 to 6 were treated with three aqueous solutions of A. blazei (mean dry weight of solids being 1.2, 5.6, 11.5 and 11.5 mg/ml, respectively). After this period, groups 2 to 5 were given a single ip injection 200 mg/kg DEN and groups 1 and 6 were treated with 0.9 NaCl. All animals were subjected to 70 partial hepatectomy at week five and sacrificed 4, 24 and 48 h or 8 weeks after DEN or 0.9 NaCl treatments (10th week after the beginning of the experiment). The alkaline comet assay and GST-P-positive liver foci development were used to evaluate the influence of the mushroom extracts on liver cell DNA damage and on the initiation of liver carcinogenesis, respectively. Previous treatment with the highest concentration of A. blazei (11.5 mg/ml) significantly reduced DNA damage, indicating a protective effect against DEN-induced liver cytotoxicity/genotoxicity. However, the same dose of mushroom extract significantly increased the number of GST-P-positive liver foci

Cancer Chemoprevention by Ginseng in Mouse Liver and Other Organs

Oral administration of red ginseng extracts (1% in diet for 40 weeks) resulted in the significant suppression of spontaneous liver tumor formation in C3H/He male mice. Average number of tumors per mouse in control group was 1.06, while that in red ginseng extracts-treated group was 0.33 (p<0.05). Incidence of liver tumor development was also lower in red ginseng extracts-treated group, although the difference from control group was not statistically significant. Anti-carcinogenic activity of white ginseng extracts, besides red ginseng extracts, was also investigated. In the present study, the administration of white ginseng extracts was proven to suppress tumor promoter-induced phenomena in vitro and in vivo. It is of interest that oral administration of the extracts of Ren-Shen-Yang- Rong-Tang, a white ginseng-containing Chinese medicinal prescription, resulted in the suppression of skin tumor promotion by 12-o-tetradecanoylphorbol-13-acetate in 7,12-dimethylbenz[a]anthracene-initiated CD-1 mice. These results suggest the usefulness of ginseng in the field of cancer prevention.