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Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
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Arteries, the vasculature responsible for transporting blood from the heart, possess robust walls capable of enduring the elevated pressures exerted by the heartbeat. Arteries near the heart are especially thick-walled and enriched with elastic fibers across their three tunics, classifying them as elastic or conducting arteries. These arteries, usually with a diameter exceeding 10 mm, are characterized by their ability to dilate in response to the blood pumped from the heart's ventricles and...
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Video Experimental Relacionado

Updated: Jun 19, 2026

Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
08:42

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Published on: October 22, 2014

Función endotelial: ¿un factor determinante crítico en la aterosclerosis?

Ulf Landmesser1, Burkhard Hornig, Helmut Drexler

  • 1Medizinische Hochschule Hannover, Abteilung Kardiologie und Angiologie, Carl Neuberg Str.1, 30625 Hannover, Germany.

Circulation
|June 3, 2004
PubMed
Resumen

La disfunción endotelial, vinculada a afecciones como el colesterol alto y la diabetes, perjudica la función de los vasos sanguíneos. La evaluación de esta disfunción puede ayudar a identificar pacientes con alto riesgo de enfermedad cardiovascular.

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Área de la Ciencia:

  • Medicina Cardiovascular La medicina cardiovascular es una especialidad de la salud.
  • Biología Vascular Biología Vascular
  • La bioquímica es la bioquímica.

Sus antecedentes:

  • Los factores de riesgo de aterosclerosis como la hipercolesterolemia, la hipertensión, la diabetes y el tabaquismo están relacionados con la disfunción endotelial.
  • La función endotelial a menudo se evalúa a través de la vasomoción dependiente del endotelio, asumiendo que la vasodilatación deteriorada refleja una disfunción endotelial más amplia.
  • El óxido nítrico (NO) derivado del endotelio juega un papel clave en la vasodilatación, la antiinflamación y la antitrombosis, inhibiendo la adhesión de leucocitos y plaquetas y la expresión de PAI-1.

Objetivo del estudio:

  • Para explorar las implicaciones pronósticas de la alteración de la vasomoción dependiente del endotelio.
  • Investigar el papel de las especies reactivas de oxígeno y la inflamación, incluida la proteína C reactiva, en la disfunción endotelial.
  • Para determinar si la evaluación de la función endotelial puede identificar clínicamente pacientes de alto riesgo.

Principales métodos:

  • Revisión de la literatura existente sobre los mecanismos de disfunción endotelial y evaluación.
  • Análisis de estudios que vinculan la disfunción endotelial con los factores de riesgo cardiovascular y pronóstico.
  • Examen de la investigación emergente sobre las especies reactivas de oxígeno y las vías inflamatorias en la disfunción endotelial.

Principales resultados:

  • La alteración de la vasomoción dependiente del endotelio muestra implicaciones pronósticas significativas e independientes.
  • El aumento de la producción vascular de especies reactivas de oxígeno es un mecanismo común que subyace a la disfunción endotelial.
  • La inflamación y la proteína C reactiva pueden contribuir directamente a la disfunción endotelial.

Conclusiones:

  • La evaluación de la función endotelial tiene potencial para la estratificación del riesgo clínico.
  • La comprensión de mecanismos como la regulación de las especies reactivas de oxígeno puede dar lugar a nuevas estrategias terapéuticas.
  • Dirigirse a la disfunción endotelial podría mejorar el pronóstico del paciente en enfermedades cardiovasculares.