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Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors
Published on: July 8, 2012
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Una receptor tirosina quinasa específica de las poblaciones hematopoiéticas de células madre y progenitoras
W Matthews1, C T Jordan, G W Wiegand
1Department of Molecular Biology, Princeton University, New Jersey 08540.
Cell
|June 28, 1991
Resumen
Los investigadores identificaron la quinasa hepática fetal-2 (flk-2), una nueva receptor tirosina quinasa, en las células madre hematopoyéticas. Este gen es este gen.
Área de la Ciencia:
- Hematología Hematología.
- Biología Molecular Biología Molecular
- Investigación con células madre.
Sus antecedentes:
- Las células madre hematopoyéticas (HSC) son cruciales para la formación de la sangre.
- La comprensión de la biología molecular HSC es clave para la medicina regenerativa.
- Los nuevos genes involucrados en la función HSC requieren identificación.
Objetivo del estudio:
- Para identificar los genes que regulan la actividad de las células madre hematopoyéticas.
- Para caracterizar un nuevo gen expresado en células hematopoyéticas primitivas.
Principales métodos:
- Aislamiento de ADNc de poblaciones de células murinas enriquecidas para la actividad de células madre.
- Análisis de la expresión génica utilizando métodos cuantitativos.
- Comparación de la secuencia génica con los genes relacionados conocidos.
Principales resultados:
- Se aisló un nuevo ADNc que codifica un receptor de la tirosina quinasa, la quinasa-2 del hígado fetal (flk-2).
- La expresión de flk-2 está restringida a las poblaciones de células madre y a los progenitores primitivos.
- flk-2 muestra relación con el producto genético del locus W c-kit.
Conclusiones:
- flk-2 puede desempeñar un papel crítico en la transducción de señales dentro de las células madre hematopoyéticas totipotentes.
- El patrón de expresión restringida sugiere que flk-2 es un marcador para el desarrollo hematopoyético temprano.
- Se requiere una mayor investigación sobre la función de flk-2 para comprender la auto-renovación del HSC.
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