RESUMO
Protracted prenatal irradiation of animals at the preimplantation stage of embryogenesis is shown to produce disturbances in the development of regulation systems, with their consequences persisting up to sexually mature period of postnatal life. Unknown before, these effects of preimplantation irradiation give the experimental confirmation to the main statement of the previously proposed theoretical concept of the "systemic teratogenesis": the ultimate effect of prenatal irradiation is a distortion of the structure of postnatal neuroimmunoendocrine regulation in the direction of overdevelopment of its endocrine component with the following coadaptive underdevelopment of the nervous and immune components.
Assuntos
Anormalidades Induzidas por Radiação/etiologia , Blastocisto/efeitos da radiação , Sistema Endócrino/efeitos da radiação , Sistema Imunitário/efeitos da radiação , Sistema Nervoso/efeitos da radiação , Glândulas Suprarrenais/efeitos da radiação , Hormônio Adrenocorticotrópico/sangue , Fatores Etários , Animais , Animais Recém-Nascidos , Formação de Anticorpos/imunologia , Formação de Anticorpos/efeitos da radiação , Radioisótopos de Césio/administração & dosagem , Sistema Endócrino/embriologia , Eritrócitos/imunologia , Feminino , Sistema Imunitário/embriologia , Insulina/sangue , Sistema Nervoso/embriologia , Doses de Radiação , Ratos , Ratos Wistar , Ovinos , Pele/microbiologia , Pele/efeitos da radiaçãoRESUMO
For the first time a case of AIDS was detected in the Krasnodar Territory of the USSR, and the presence of HIV infection in homosexuals, foreign students, and promiscuous persons was established. To study the spread of HIV infection, 5 diagnostic laboratories were created and 5 routes for the transportation of sera were organized. This permitted the screening of the population in 1988 with the complete coverage of groups to be placed under surveillance.
Assuntos
Infecções por HIV/epidemiologia , Vigilância da População , Síndrome da Imunodeficiência Adquirida/epidemiologia , Portador Sadio/epidemiologia , Soroprevalência de HIV , Humanos , Fatores de Risco , Federação Russa/epidemiologia , Estudos SoroepidemiológicosAssuntos
Equilíbrio Ácido-Base , Córtex Suprarrenal/fisiopatologia , Glândulas Suprarrenais/fisiopatologia , Eletrólitos/sangue , Complicações do Trabalho de Parto/fisiopatologia , Sistema Nervoso Simpático/fisiopatologia , Hemorragia Uterina/fisiopatologia , Doença Aguda , Adolescente , Adulto , Feminino , Humanos , Rim/fisiopatologia , Gravidez , Choque Hemorrágico/fisiopatologiaRESUMO
The corticosterone effect on the cyanide-sensitive (mitochondrial) respiration of liver slices of intact and adrenalectomized rats has been studied. The 10(-5) M hormone has been shown to inhibit the mitochondrial respiration of intact rat liver slices. A similar effect is observed in adrenalectomized rats after a short-term stimulation. A stimulating effect of the 10(-8) M steroid on the mitochondrial liver slices respiration is observed in adrenalectomized rats only. Both stimulating and inhibiting effects are recorded 5 min after incubation of the slices with the hormone. It has been concluded that corticosterone can produce a direct effect on the liver cell mitochondrial respiration. It has been assumed that mitochodrial respiration stimulation by a physiological level of the steroid can be important for cell preparation for hormone nucleic effect realization.
Assuntos
Corticosterona/farmacologia , Mitocôndrias Hepáticas/efeitos dos fármacos , Consumo de Oxigênio/efeitos dos fármacos , Adrenalectomia , Animais , Técnicas In Vitro , Masculino , Mitocôndrias Hepáticas/metabolismo , RatosRESUMO
Binding of 3H-corticosterone, 3H-estradiol and 3H-testosterone to the rat liver mitochondria was studied. One type of specific binding sites for corticosterone with association constant (3.25 +/- 0.51) X 10(10) M-1 and the number of binding sites (1.79 +/- +/- 0.21) X 10(-13) mol/mg of protein was found. Adrenalectomy did not change significantly corticosterone affinity to mitochondria but increased binding capacity by 70%. Binding of estradiol and testosterone was of non-specific, hydrophobic character.