Lessons from tumor and immunocompetent cells. The quantitative engagement of ligand-receptor interactions modulates stop-and-go behavior as well as proliferation
Medicina (B.Aires)
; 60 Suppl 2: 27-33, 2000.
Artículo
en Español
| LILACS, BINACIS
| ID: biblio-1165063
Biblioteca responsable:
BR1.1
Ubicación: [{"text": "AR2.1"}]
ABSTRACT
The four main cell functions, proliferation, apoptosis, differentiation and migration, are tightly regulated by external signals that initiate intracellular signal transduction pathways and determine the cellular behaviour. The concentration and composition of such external signals are at least important for the decision of cells as to which function has to be executed. Interleukin-8 is a well known inducing signal for neutrophil granulocyte migration, while the epidermal growth factor is an inducing signal for breast carcinoma cell migration. Depending on the concentrations of interleukin-8, the neutrophil granulocytes are capable of migration. However, at high concentration of interleukin-8 the migratory activity of each single cell is reduced, indicating that high concentrations of the chemokine inhibit migration and promote the performance of other cell functions. Concerning breast carcinoma cells, the epidermal growth factor is not only an inducer of migration but also an inhibitor of proliferation. These two examples provide evidence for a dose dependent action of external signals for several cell functions in parallel. This versatility of the effects of one ligand might be based on several intracellular signal transduction pathways that are turned on. For the dose-dependent differences of the effect of interleukin-8 we propose a two wheel model of an inositolphosphate-mediated, ATP-independent release of calcium from intracellular stores and a cyclic AMP-mediated, ATP-dependent uptake of calcium into the endoplasmatic reticulum.
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Colección:
Bases de datos internacionales
/
Bases de datos nacionales
/
Argentina
Contexto en salud:
ODS3 - Meta 3.4 Reducir las muertes prematuras por enfermedades no transmisibles
Problema de salud:
Neoplasia de la Mama
/
Otras Enfermedades Hematológicas
Base de datos:
BINACIS
/
LILACS
Asunto principal:
Fenómenos Fisiológicos Celulares
/
Quimiotaxis de Leucocito
/
Interleucina-8
/
Factor de Crecimiento Epidérmico
/
Neutrófilos
Tipo de estudio:
Estudio pronóstico
Límite:
Humanos
Idioma:
Inglés
/
Español
Revista:
Medicina (B.Aires)
/
Medicina [B Aires]
Asunto de la revista:
Medicina
Año:
2000
Tipo del documento:
Artículo