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Asthma: Pathogenesis and Management01:20

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Asthma is a chronic pulmonary condition involving inflammation of the airways, hyper-reactivity, and reversible obstruction of the airways. This condition can significantly impact a person's quality of life, making breathing difficult and leading to distressing symptoms.
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
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Asthma-II: Pathophysiology and Classification01:26

Asthma-II: Pathophysiology and Classification

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Asthma is a prevalent chronic respiratory condition marked by inflammation and hyperresponsiveness of the airways. Its pathophysiology involves complex interactions among inflammatory pathways, immune responses, and neural mechanisms.
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
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Asthma-I: Introduction01:29

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Asthma is a chronic respiratory ailment that requires careful management due to its varying symptoms and influencing factors. It is characterized by airway inflammation, bronchial hyperresponsiveness, and reversible airflow obstruction, leading to symptoms like wheezing, shortness of breath, chest tightness, and coughing. The symptom frequency and intensity may vary considerably over time. It is also linked to immune system responses to allergens and irritants, highlighting the complex...
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Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
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The diagnosis and management of asthma are comprehensive, encompassing clinical assessments, lung function tests, and pharmacological interventions. Here's an overview:
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Asthma-III: Symptoms and Complications01:24

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Asthma, a common chronic respiratory condition, is classified considering the frequency and severity of symptoms alongside lung function impairment. Understanding this classification is essential for appropriate treatment and management. Here's a detailed look at the classification of asthma and its clinical features and complications:
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Contribución genética al asma informa la fisiopatología del síndrome torácico agudo y la estratificación del riesgo

Sara El Aouhel1, Vanessa Bellegarde2, Stennio Da Silva Faria1

  • 1CHU Sainte-Justine Azrieli Research Center, Montréal, Québec, Canada.

American journal of hematology
|February 27, 2026
PubMed
Resumen
Este resumen es generado por máquina.

La propensión genética al asma aumenta el síndrome torácico agudo (STA) frecuente en pacientes con enfermedad de células falciformes (ECF) con baja hemoglobina fetal (HbF). La combinación de puntuaciones poligénicas de asma (PGSasma) y HbF identifica a personas de alto riesgo para un manejo personalizado.

Palabras clave:
síndrome torácico agudoasmapuntuación poligénicaestratificación del riesgoenfermedad de células falciformes

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Área de la Ciencia:

  • Genética
  • Hematología
  • Neumología

Sus antecedentes:

  • El síndrome torácico agudo (STA) es una complicación grave de la enfermedad de células falciformes (ECF), que afecta aproximadamente al 50% de los pacientes.
  • Las herramientas actuales son insuficientes para identificar a las personas con alto riesgo de aparición de STA o episodios frecuentes.
  • Los estudios epidemiológicos sugieren una asociación entre el asma y el STA, pero un vínculo causal sigue sin estar claro.

Objetivo del estudio:

  • Investigar si una predisposición genética al asma se asocia con el STA en pacientes con ECF.
  • Determinar si las puntuaciones poligénicas para el asma (PGSasma) pueden estratificar el riesgo de STA.
  • Explorar el efecto combinado de PGSasma y hemoglobina fetal (HbF) en episodios frecuentes de STA.

Principales métodos:

  • Se utilizaron puntuaciones poligénicas (PGS) para evaluar la propensión genética al asma en relación con el STA.
  • Se analizaron datos de dos cohortes prospectivas de ECF: CSSCD (n=1278) y GEN-MOD (n=406).
  • Se examinó la asociación de PGSasma con la tasa y la aparición de STA, independientemente de los niveles de HbF, y se evaluó la correlación genética.

Principales resultados:

  • La PGSasma se asoció significativamente con la tasa de episodios de STA (p=0,006) pero no con la aparición de STA en ambas cohortes.
  • Esta asociación fue más pronunciada en pacientes con niveles más bajos de HbF.
  • La combinación de PGSasma alta y HbF baja identificó un subgrupo con alto riesgo de STA frecuente después de un primer episodio.

Conclusiones:

  • Una alta propensión genética al asma está relacionada con STA frecuente en pacientes con ECF, particularmente cuando los niveles de HbF son bajos.
  • La combinación de PGSasma y niveles de HbF puede identificar a pacientes con alto riesgo de STA frecuente.
  • Estos hallazgos sugieren un potencial para estrategias de manejo personalizadas en pacientes con ECF propensos a STA.