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1.
Mem. Inst. Oswaldo Cruz ; 105(6): 811-817, Sept. 2010. ilus, tab
Article in English | LILACS | ID: lil-560668

ABSTRACT

Protein-energy malnutrition and micronutrient deficiencies may down-regulate immune response and increase morbidity and mortality due to infection. In this study, a murine model was used to study the effects of protein, iron and zinc deficiencies on the immune response to Leishmania (Leishmania) chagasi infection. Mice were initially fed a standard diet or with a diet containing 3 percent casein but deficient in zinc and iron. After malnutrition was established, mice were inoculated with L. chagasiand sacrificed four weeks later in order to evaluate liver and spleen parasite loads and serum biochemical parameters. Significant decreases in liver and spleen weight, an increase in the parasite loads in these organs and decreases in serum protein and glucose concentrations in malnourished animals were observed. Furthermore, the production of interferon-gamma by spleen cells from infected malnourished mice stimulated by Leishmaniaantigen was significantly lower compared with that in control diet mice. These data suggest that malnutrition alters the immune response to L. chagasiinfection in the BALB/c model and, in association with the effects on biochemical and anatomical parameters of the host, favored increases in the parasite loads in the spleens and livers of these animals.


Subject(s)
Animals , Female , Mice , Adaptive Immunity/immunology , Iron , Leishmania infantum , Leishmaniasis, Visceral/immunology , Protein-Energy Malnutrition/immunology , Zinc , Cytokines/biosynthesis , Disease Models, Animal , Iron/immunology , Leishmaniasis, Visceral/blood , Leishmaniasis, Visceral/pathology , Liver , Mice, Inbred BALB C , Nitric Oxide/biosynthesis , Spleen , Zinc/immunology
2.
Pediatria (Säo Paulo) ; 16(1): 34-43, jan.-mar. 1994.
Article in Portuguese | LILACS | ID: lil-159072

ABSTRACT

A autora fez uma revisao da literatura a respeito das relacoes entre ferro e infeccoes, com o objetivo de conhecer os aspectos mais atuais sobre o tema. Tanto a carencia de ferro como as infeccoes sao problemas no nosso meio, sendo necessario que os pediatras conhecam um pouco mais sobre este assunto tao polemico.


Subject(s)
Humans , Bacterial Infections/immunology , Iron/metabolism , Mycoses/immunology , Iron Deficiencies/complications , Iron/administration & dosage , Iron/adverse effects , Iron/immunology , T-Lymphocytes/pathology
3.
Perinatol. reprod. hum ; 8(1): 20-8, ene.-mar. 1994. tab, ilus
Article in Spanish | LILACS | ID: lil-139944

ABSTRACT

Se realizó una revisión de los trabajos realizados con respecto a las posibles asociaciones entre algunas deficiencias nutricionales y el desarrollo de alteraciones en el sistema inmune. Se ha demostrado que la desnutrición energético-proteica ocaciona aumento en la incidencia de infecciones gastrointestinales y respiratorias con disminución importante de la inmunidad celular. Con respecto a nutrimentos específicos, las deficiencias de zinc, hierro y vitamina A entre otros, ejercen influencias negativas sobre la respuesta inmune tanto celular como humoral incluyendo los mecanismos inespecíficos de defensa


Subject(s)
Humans , Animals , Dietary Vitamins/metabolism , Gastrointestinal Diseases/immunology , Iron/deficiency , Iron/immunology , Protein-Energy Malnutrition/immunology , Protein-Energy Malnutrition/physiopathology , Respiratory Tract Infections/immunology , Vitamin A/immunology
4.
Perinatol. reprod. hum ; 8(1): 29-32, ene.-mar. 1994. tab
Article in Spanish | LILACS | ID: lil-139945

ABSTRACT

Con el objetivo de establecer si existe asociación entre la capacidad de respuesta inmune (evaluada a través de la respuesta fagocitaria) y el estado de nutrición en hierro en gestantes aparentemente sanas, se realizó una investigación de carácter transversal con tres grupos de estudio, uno por cada trimestre de la gestación con un total de 81 embarazadas. Se determinó la fagocitosis y la concentración de hemoglobina y ferritina. En los tres grupos estudiados los indicadores del estado de nutrición en hierro permitieron explicar entre el 14 y el 34 por ciento de la variabilidad de la fagocitosis


Subject(s)
Humans , Female , Pregnancy , Hemoglobinometry/statistics & numerical data , /metabolism , Iron/administration & dosage , Iron/immunology , Nutritional Sciences , Phagocytosis/immunology , Pregnancy/immunology
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