820 resultados para Muñoz Molina


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Thy-1 is an abundant neuronal glycoprotein of poorly defined function. We recently provided evidence indicating that Thy-1 clusters a beta3-containing integrin in astrocytes to induce tyrosine phosphorylation, RhoA activation and the formation of focal adhesions and stress fibers. To date, the alpha subunit partner of beta3 integrin in DI TNC1 astrocytes is unknown. Similarly, the ability of neuronal, membrane-bound Thy-1 to trigger astrocyte signaling via integrin engagement remains speculation. Here, evidence that alphav forms an alphavbeta3 heterodimer in DI TNC1 astrocytes was obtained. In neuron-astrocyte association assays, the presence of either anti-alphav or anti-beta3 integrin antibodies reduced cell-cell interaction demonstrating the requirement of both integrin subunits for this association. Moreover, anti-Thy-1 antibodies blocked stimulation of astrocytes by neurons but not the binding of these two cell types. Thus, neuron-astrocyte association involved binding between molecular components in addition to the Thy-1-integrin; however, the signaling events leading to focal adhesion formation in astrocytes depended exclusively on the latter interaction. Additionally, wild-type (RLD) but not mutated (RLE) Thy-1 was shown to directly interact with alphavbeta3 integrin by Surface Plasmon Resonance analysis. This interaction was promoted by divalent cations and was species-independent. Together, these results demonstrate that the alphavbeta3 integrin heterodimer interacts directly with Thy-1 present on neuronal cells to stimulate astrocytes.

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Tesis (Maestría en Ciencias de la Administración con especialidad en Producción) U.A.N.L.

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Tesis (Maestría en Ciencias de la Ingeniería Mecánica con especialidad en Materiales) U.A.N.L.

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Tesis (Maestría en Ciencias de la Ingeniería Mecánica con Especialidad en Diseño) U.A.N.L.

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Tesis (Maestría en Ciencias de la Administración con Especialidad en Finanzas) U.A.N.L.

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Tesis (Maestría en Enfermería, con Especialidad en Materno Infantil-Pediatría) U.A.N.L.

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Tesis (Maestría en Ciencias con Especialidad en Entomología Médica) U.A.N.L.

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Tesis (Maestría en Ciencias de la Administración con Especialidad en Producción y Calidad) U.A.N.L.

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Tesis (Maestría en Ciencias con Especialidad en Ingeniería Cerámica) U.A.N.L.

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Tesis (Maestría en Ciencias Químicas con Especialidad en Química Analítica) U.A.N.L.