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Archaea, a domain of single-celled microorganisms, are classified into five major phyla based on genetic and biochemical characteristics: Euryarchaeota, Crenarchaeota, Thaumarchaeota, Korarchaeota, and Nanoarchaeota. Among these, the phylum Euryarchaeota is notable for its remarkable diversity in morphology, metabolism, and ecological adaptations.Morphological and Metabolic DiversityMembers of Euryarchaeota exhibit a variety of cellular shapes, including rods and cocci. Their metabolic pathways...
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Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...
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Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
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Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
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The concept of a cell started with microscopic observations of dead cork tissue by Robert Hooke in 1665. Hooke coined the term "cell" based on the resemblance of the small subdivisions in the cork to the rooms that monks inhabited, called cells. About ten years later, Antonie van Leeuwenhoek became the first person to observe the living and moving cells under a microscope. In the century that followed, the theory that cells represented the basic unit of life developed.
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La falta de diversidad en los estudios genéticos humanos

Giorgio Sirugo1, Scott M Williams2, Sarah A Tishkoff3

  • 1Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Division of Translational Medicine and Human Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.

Cell
|March 23, 2019
PubMed
Resumen
Este resumen es generado por máquina.

Los estudios de asociación genética están sesgados hacia las poblaciones europeas, lo que limita la predicción precisa del riesgo de enfermedad a nivel mundial. La investigación debe incluir poblaciones diversas para mejorar la equidad en salud y la comprensión de los factores genéticos en la enfermedad.

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Área de la Ciencia:

  • La genética
  • Salud de la población
  • Epidemiología genómica

Sus antecedentes:

  • La mayoría de los estudios de asociación genética se concentran en poblaciones de ascendencia europea.
  • Este enfoque estrecho crea un sesgo significativo en la comprensión de la genética de las enfermedades en todo el mundo.
  • Las implicaciones se extienden a la precisión de la predicción del riesgo de enfermedad en diversas comunidades globales.

Objetivo del estudio:

  • Resaltar la necesidad crítica de una mayor diversidad en los estudios de asociación genética.
  • Demostrar las limitaciones impuestas por el sesgo europeo actual en la investigación genética.
  • Abogar por una inclusión más amplia de las poblaciones globales en los estudios genómicos.

Principales métodos:

  • El comentario examina ejemplos empíricos existentes de estudios de asociación genética.
  • Utiliza un razonamiento teórico para subrayar la importancia de la diversidad de la población.
  • El análisis se centra en el impacto de la subrepresentación en los modelos de predicción de riesgos.

Principales resultados:

  • El sesgo europeo en los estudios genéticos conduce a predicciones de riesgo de enfermedad subóptimas o inexactas para las poblaciones no europeas.
  • Los datos empíricos y los argumentos teóricos apoyan la necesidad de cohortes diversas.
  • La subrepresentación sesga la generalización de los hallazgos genéticos.

Conclusiones:

  • La expansión de los estudios de asociación genética a diversas poblaciones es esencial para la equidad en la salud mundial.
  • Abordar el sesgo europeo mejorará la precisión y la aplicabilidad de la medicina genómica.
  • La investigación futura debe priorizar la inclusión para avanzar en nuestra comprensión de la genética de las enfermedades en todas las poblaciones.