Video Experimental Relacionado

Updated: Jan 25, 2026

Effects of Surgical Masks on Cardiopulmonary Function in Healthy Subjects

Effects of Surgical Masks on Cardiopulmonary Function in Healthy Subjects

Published on: February 12, 2021

La agregación plaquetaria inducida por el difosfato de adenosina está asociada con variaciones en la secuencia génica

Pierre Fontana¹, Annabelle Dupont, Sophie Gandrille

¹Service d'Hématologie Biologique A, Hôpital Européen Georges Pompidou and Inserm Unité 428, Faculté des Sciences Pharmaceutiques et Biologiques, Université Paris V, Paris, France. pierre.fontana@egp.ap-hop-paris.fr

|August 13, 2003

Resumen

Las variaciones genéticas en el receptor P2Y12 influyen en la agregación plaquetaria inducida por el difosfato de adenosina (ADP). Un haplotipo específico del gen P2Y12 (H2) está relacionado con respuestas plaquetarias alteradas, lo que podría afectar el riesgo de enfermedades cardiovasculares y la eficacia de los medicamentos antiplaquetarios.

Área de la Ciencia:

La farmacogenómica es la farmacogenómica.
Investigación cardiovascular Investigación cardiovascular Investigación cardiovascular Investigación cardiovascular Investigación cardiovascular
Biología plaquetaria Biología plaquetaria.

Sus antecedentes:

El receptor P2Y12 es un objetivo clave para la terapia antiplaquetaria en enfermedades cardiovasculares.
Existe una variabilidad interindividual en la agregación plaquetaria inducida por el difosfato de adenosina (ADP), pero su base genética no está clara.

Objetivo del estudio:

Para investigar los mecanismos genéticos subyacentes a la variabilidad en la agregación plaquetaria inducida por ADP.
Para identificar variaciones de secuencia en el gen receptor P2Y12 asociado con fenotipos de agregación plaquetaria.

Principales métodos:

Examinó la agregación plaquetaria inducida por ADP en 98 voluntarios sanos para identificar a los que respondieron mejor y a los que respondieron menos.
Se examinó el gen P2Y12 en busca de variaciones de secuencia e identificó polimorfismos y haplotipos comunes (H1 y H2).
Haplotipos de genes P2Y12 correlacionados con la máxima agregación plaquetaria inducida por ADP y niveles de monofosfato de adenosina cíclica (cAMP).

Principales resultados:

Se identificaron dos grupos distintos de sujetos con respuestas altas y bajas de agregación plaquetaria inducida por ADP.
Cuatro frecuentes polimorfismos P2Y12 estaban en desequilibrio de enlace, definiendo dos haplotipos (H1 y H2).
El haplotipo H2 del gen P2Y12 se asoció significativamente con la máxima agregación plaquetaria inducida por ADP (P=0,007) y una regulación a la baja de la cAMP mediada por ADP más pronunciada.

Conclusiones:

Un haplotipo específico (H2) del gen receptor P2Y12 está asociado con la agregación plaquetaria inducida por ADP en individuos sanos.
Las personas portadoras del haplotipo H2 pueden enfrentar un mayor riesgo de atherothrombosis.
Los portadores del haplotipo H2 podrían exhibir una eficacia clínica reducida de los fármacos antiplaquetarios inhibidores de P2Y12.

Más Videos Relacionados

Turbidimetry on Human Washed Platelets: The Effect of the Pannexin1-inhibitor Brilliant Blue FCF on Collagen-induced Aggregation

Turbidimetry on Human Washed Platelets: The Effect of the Pannexin1-inhibitor Brilliant Blue FCF on Collagen-induced Aggregation

Published on: April 6, 2017

Platelet Adhesion and Aggregation Under Flow using Microfluidic Flow Cells

Platelet Adhesion and Aggregation Under Flow using Microfluidic Flow Cells

Published on: October 27, 2009

Videos de Conceptos Relacionados

Bioavailability Study Design: Healthy Subjects Versus Patients

Bioavailability Study Design: Healthy Subjects Versus Patients

Bioavailability studies are essential for evaluating a drug's therapeutic efficacy and understanding its absorption patterns under various physiological conditions. Conducting such studies on target patient populations provides more relevant data by simulating real-world disease states. However, practical challenges often necessitate the use of young, healthy adult volunteers as study subjects.Patients may exhibit altered drug absorption patterns due to the effects of the disease itself,...

What is Variation?

What is Variation?

Apart from the measures of central tendency, distribution, outliers, and the changing characteristics of data with time, an important characteristic of any data set is its variation or spread. In some data sets, the data values are concentrated closely near the mean; in others, the data values are more widely spread out from the mean.
The range, standard deviation, standard error, and variance are the different measures of variation.
Range: The range is the difference between its maximum and...

Conservative Site-specific Recombination and Phase Variation

Conservative Site-specific Recombination and Phase Variation

Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...

Variation

Variation

An important characteristic of any set of data is the variation in the data. In some data sets, the data values are concentrated closely near the mean; in other data sets, the data values are more widely spread out from the mean. The most common measure of variation, or spread, is the standard deviation, which is the square root of variance.
When independent and dependent variables are plotted on a scatter plot, the slope of a line is a value that describes the rate of change between the two...

Variation of Atmospheric Pressure

Variation of Atmospheric Pressure

Change in atmospheric pressure with height is particularly interesting. The decrease in atmospheric pressure with increasing altitude is due to the decreasing gravitational force per unit area as we move away from the surface of the earth.
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...

Comparing Copy Number Variations and SNPs

Comparing Copy Number Variations and SNPs

Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...