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El poblado del Pacífico desde una perspectiva bacteriana
Yoshan Moodley1, Bodo Linz, Yoshio Yamaoka
1Max-Planck-Institut für Infektionsbiologie, Department of Molecular Biology, Charitéplatz 1, 10117 Berlin, Germany.
Science (New York, N.Y.)
|January 24, 2009
Resumen
Dos migraciones humanas prehistóricas a través del Pacífico trajeron distintas cepas de Helicobacter pylori, hpSahul y hspMaori. Estos antiguos linajes de patógenos evolucionaron junto con las poblaciones humanas, reflejando patrones de migración y aislamiento.
Área de la Ciencia:
- Genética y Biología Evolutiva.
- La Antropología Antropología Antropología.
- Microbiología Microbiología.
Sus antecedentes:
- La región del Pacífico fue poblada por dos grandes migraciones humanas prehistóricas.
- Estas migraciones introdujeron dos linajes distintos del patógeno humano Helicobacter pylori: hpSahul y hspMaori.
Objetivo del estudio:
- Rastrear los orígenes y la dispersión de las poblaciones de Helicobacter pylori en el Pacífico.
- Para correlacionar la divergencia genética de H. pylori con los eventos de migración humana.
Principales métodos:
- Análisis filogenético de las cepas de Helicobacter pylori.
- Comparación de la divergencia genética con datos arqueológicos y lingüísticos.
Principales resultados:
- La población hpSahul divergió de la H. pylori asiática hace 31,000-37,000 años, alineándose con las primeras migraciones humanas a Nueva Guinea y Australia.
- Las poblaciones de hpSahul en Nueva Guinea y Australia muestran divergencias, lo que indica un aislamiento de 23,00032,000 años.
- La población hspMaori se dispersó con hablantes de lenguas austronesias de Taiwán hace unos 5.000 años, coevolucionando en Melanesia y Polinesia.
Conclusiones:
- Las poblaciones de Helicobacter pylori sirven como marcadores confiables para reconstruir las migraciones humanas prehistóricas en el Pacífico.
- La coevolución de hpSahul y hspMaori con huéspedes humanos proporciona información sobre los antiguos movimientos de población y eventos de aislamiento.
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