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1.
J Natl Cancer Inst ; 67(5): 1053-5, 1981 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-6946247

RESUMO

Methylazoxymethanol-beta-D-glucosiduronic acid (MAM-GlcUA) was administered to young adult male Sprague-Dawley rats by oral and ip routes. Most neoplasms developed in rats that had received the compound orally. The most prevalent site for the neoplasms was the intestinal tract, predominantly the colon. Comparatively fewer tumors occurred in the liver and kidneys. Germfree rats did not develop tumors when MAM-GlcUA was administered either orally or ip.


Assuntos
Compostos Azo/toxicidade , Carcinógenos , Cicasina/toxicidade , Vida Livre de Germes , Administração Oral , Animais , Cicasina/administração & dosagem , Injeções Intraperitoneais , Neoplasias Intestinais/induzido quimicamente , Neoplasias Renais/induzido quimicamente , Neoplasias Hepáticas/induzido quimicamente , Masculino , Neoplasias Experimentais/induzido quimicamente , Ratos
2.
Arch Pathol Lab Med ; 100(8): 445-7, 1976 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-182103

RESUMO

On the basis of our study of 12 cases of granular cell tumors in the brains of rats of different inbred strains, it seems that granular cell tumors are not rate in the central nervous system of untreated, aging BN/Bi rats. In none were metastases found. Awareness of the occurrence of these tumors in the central nervous system of these rats may stimulate further studies into the cellular origin of granular cell tumors that form in the central nervous system of the rat and might help to elucidate the origin of these tumors in general.


Assuntos
Neoplasias Encefálicas/patologia , Neoplasias de Tecido Muscular/patologia , Animais , Neoplasias Encefálicas/epidemiologia , Neoplasias Cerebelares , Feminino , Masculino , Neoplasias de Tecido Muscular/epidemiologia , Ratos , Ratos Endogâmicos BN
5.
Science ; 163(3862): 88-90, 1969 Jan 03.
Artigo em Inglês | MEDLINE | ID: mdl-5812599

RESUMO

Fischer rats injected with methylazoxymethanol late in pregnancy produce young with considerably reduced cerebral hemispheres. They appear normal otherwise. As adults these animals make many more errors in the Hebb-Williams maze than do control animals.


Assuntos
Anormalidades Induzidas por Medicamentos , Álcoois/toxicidade , Compostos Azo/toxicidade , Carcinógenos/toxicidade , Deficiências da Aprendizagem , Troca Materno-Fetal , Microcefalia/induzido quimicamente , Prenhez , Animais , Encéfalo , Feminino , Feto/efeitos dos fármacos , Humanos , Deficiências da Aprendizagem/complicações , Masculino , Microcefalia/complicações , Tamanho do Órgão , Gravidez , Ratos
14.
J Natl Cancer Inst ; 39(2): 355-71, 1967 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-18623950

RESUMO

The glucoside cycasin, an effective hepatotoxin and carcinogen in conventional rats, fails to produce these effects when administered to germfree rats. The hepatotoxic and carcinogenic effects of cycasin can also be elicited after prior hydrolysis to the aglycone. The aglycone (MAM) and the synthetic aglycone acetate ester produce all the effects in germfree rats of which the intact glucoside is capable only when fed to conventional rats. The aglycone is therefore the proximate carcinogen. Its liberation from the glucoside in conventional rats is mediated in the intestinal tract by a beta-glucosidase of bacterial origin. Intraperitoneal administration of the synthetic aglycone acetate and the free aglycone appears to be the most effective route for tumor induction and, of these resulting tumors, the most frequent are in the intestinal tract.


Assuntos
Carcinógenos/toxicidade , Vida Livre de Germes , Acetato de Metilazoximetanol/análogos & derivados , Acetato de Metilazoximetanol/toxicidade , Neoplasias Experimentais/induzido quimicamente , Inibidores da Síntese de Proteínas/toxicidade , Animais , Cicasina/toxicidade , Feminino , Hidrólise , Injeções Intraperitoneais , Masculino , Mitose/efeitos dos fármacos , Neoplasias Experimentais/patologia , Ratos
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