La adhesión de las células Langerhans epidérmicas a los queratinocitos mediada por la E-cadherin

A Tang1, M Amagai, L G Granger

  • 1Dermatology Branch, National Cancer Institute, Bethesda, Maryland 20892.

Nature
|January 7, 1993
PubMed

Insights

Las células de Langerhans (LC) en la piel utilizan la E-cadherina para adherirse a los queratinocitos (KC). La reducción de E-cadherina en LC cultivado puede explicar su migración de la piel a los ganglios linfáticos.

Área de la Ciencia:

  • Inmunología Inmunología.
  • Dermatología Dermatología dermatología.
  • Biología celular Biología celular.

Sus antecedentes:

  • Las células de Langerhans (LC) son células inmunes clave en la epidermis, que actúan como células accesorias.
  • La repoblación epidérmica se basa en los progenitores de LC derivados de la médula ósea debido a la auto-renovación limitada de LC.
  • La LC migra de la piel a los ganglios linfáticos tras la exposición al antígeno, pero los mecanismos siguen sin estar claros.

Objetivo del estudio:

  • Para investigar el papel de las interacciones de las células de Langerhans-queratinocitos (LC-KC) en el tráfico de LC.
  • Para caracterizar los mecanismos moleculares que subyacen a la adhesión de LC a las células epidérmicas.

Principales métodos:

  • Análisis de la expresión de cadherina en LC murino fresco y de cultivo.
  • Evaluación in vitro de la adhesión LC-KC.
  • Comparación de los niveles de E-caderina y la afinidad de adhesión entre LC fresco y cultivado.

Principales resultados:

  • La LC murina fresca expresa las cadherinas y se adhiere a los queratinocitos (KC) a través de la E-cadherina.
  • Los LC cultivados, que potencialmente se asemejan a las células migradas, muestran una expresión reducida de E-cadherina.
  • Los LC cultivados exhiben una disminución de la afinidad de adhesión por KC en comparación con los LC frescos.

Conclusiones:

  • La expresión de E-caderina en LC parece crucial para su retención dentro de la epidermis.
  • Las cadherinas pueden desempeñar un papel significativo, no reconocido previamente, en las interacciones leucocito-epitelial.
  • La comprensión de los mecanismos de adhesión LC-KC ofrece información sobre el tráfico y la retención de células inmunes.
Abstracto

No abstract available in PubMed .

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