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1.
ARBS annu. rev. biomed. sci ; 13(n.esp): 9-16, 2011.
Article in English | LILACS | ID: lil-619903

ABSTRACT

The term immunosenescence usually refers to the aging of the immune system. Aging isassociated with the progressive decline in immune function, resulting in an increasing susceptibility of the bodyto infection, taking into account the specific changes in T- cells, macrophages, neutrophils and dendritic cells.Dendritic cells (DCs) are play a key role in the induction of both innate and adaptive immunity. There areimmature and mature forms located in the non-lymphatic organs and lymph nodes, respectively. DCs initiateand regulate the highly pathogen-specific adaptive immune responses, and are central to the development ofimmunologic memory and tolerance. In this text, we will briefly review DCs and changes associated withhuman aging, such as cytokine secretion, antigen capture, migration and priming of T cells. This functionaldecline would lead to major morbidity associated with infections such as influenza and pneumonia, whichaffect mucosal surfaces; in addition the increased incidence of cancer in the elderly is associated with thepotential role of DCs.


Subject(s)
Aging , Dendritic Cells , Immune System/physiopathology
2.
Rev. bras. anal. clin ; 33(3): 121-125, 2001. tab
Article in Portuguese | LILACS | ID: lil-322748

ABSTRACT

Patologias como diabetes mellitus que alteram o metabolismo da glicose também interferem com o metabolismo lipídico. Foram selecionados ao acaso 1000 pacientes, os quais foram classificados pela glicemia em jejum em 4 grupos: G-1 (60 - 110 mg/dL), G-2 (111 - 125 mg/dL); G-3 (126 - 139 mg/dL), and G-4 (> ou = 140 mg/dL). A glicemia e o perfil lipídico foram medidos utilizando reagentes enzimáticos (Labtest) em sistema automatizado (Selectra II/Bayer). A comparaçäo entre os grupos foi realizada através de análise de variância (Anova/Manova). Os dados da análise mostraram: 1)o grupo normoglicêmico (G-1) apresentou valores significativamente menores (p<0,001) para colesterol total, HDL-C e triglicérides em relaçäo aos demais grupos; 2)näo houve diferença significativa nos níveis de LDL-C (p<0,05) entre os grupos estudados; 3)os níveis de colesterol total e triglicérides foram significativamente diferentes (p=0,042 e p=0,015, respectivamente) nos grupos G-3 e G-4. Os dados sugerem que a reduçäo nos valores de discriminaçäo para o diabetes mellitus preconizados pela Associaçäo Americana de Diabetes (> ou = 126 mg/dL) permitem a detecçäo de indivíduos diabéticos com níveis menores de colesterol total e triglicérides quando comparados com o critério anterior, recomendado pela Organizaçäo Mundial da Saúde (> ou = 140 mg/dL)


Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Blood Glucose , Diabetes Mellitus , Aged, 80 and over , Cholesterol, HDL , Cholesterol, LDL , Triglycerides/metabolism
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