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Videos de Conceptos Relacionados

Bone Disorders01:29

Bone Disorders

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

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Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
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Bone Remodeling01:40

Bone Remodeling

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
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Role of Vitamins in Maintaining Bone Health01:25

Role of Vitamins in Maintaining Bone Health

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The growth and maintenance of bone are regulated by a combination of nutritional factors, including vitamins, such as vitamin A, B12, C, D, and K.
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
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What is the Skeletal System?01:02

What is the Skeletal System?

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A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders
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La osteoporosis: una revisión

Suzanne N Morin1, William D Leslie2, John T Schousboe3

  • 1Department of Medicine, McGill University, Montreal, Quebec, Canada.

JAMA
|June 30, 2025
PubMed
Resumen
Este resumen es generado por máquina.

La osteoporosis afecta a millones de personas, aumentando el riesgo de fracturas en los adultos mayores. Los tratamientos efectivos incluyen medicamentos antiresortivos y anabólicos, junto con cambios en el estilo de vida y servicios de enlace de fracturas, para reducir las fracturas y mejorar los resultados.

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Área de la Ciencia:

  • Gerontología
  • La ortopedia
  • Farmacología

Sus antecedentes:

  • La osteoporosis es una condición prevalente caracterizada por una baja masa ósea y fragilidad, que conduce a una morbilidad, mortalidad y carga económica significativas.
  • A nivel mundial, las fracturas osteoporóticas afectan a una parte sustancial de la población de más de 50 años, con 1 de cada 3 mujeres y 1 de cada 5 hombres afectados.

Objetivo del estudio:

  • Describir las estrategias actuales de tratamiento de la osteoporosis, centrándose en las intervenciones farmacológicas y la atención de apoyo.
  • Destacar la importancia de la evaluación de riesgos y los enfoques de tratamiento personalizados para la prevención de fracturas.

Principales métodos:

  • Revisión de los factores de riesgo de osteoporosis, incluidos los datos demográficos, los antecedentes médicos y las mediciones de la densidad mineral ósea (DMO).
  • Evaluación de las opciones terapéuticas: agentes antiresortivos (bisfosfonatos, denosumab) y medicamentos anabólicos (teriparatida, abaloparatida y romosozumab).
  • Evaluación del papel de los servicios de enlace para las fracturas y las modificaciones del estilo de vida (calcio, vitamina D, ejercicio) en el tratamiento de la osteoporosis.

Principales resultados:

  • Se recomiendan agentes antirresortivos para pacientes de alto riesgo para reducir las fracturas vertebrales y de cadera.
  • Los medicamentos anabólicos están indicados para individuos de muy alto riesgo, a menudo seguidos de terapia antiresortiva.
  • Los servicios de enlace de fracturas mejoran significativamente el inicio y la adherencia a la medicación, reduciendo las fracturas posteriores.

Conclusiones:

  • El tratamiento de la osteoporosis requiere un enfoque multifacético que combine farmacoterapia, ajustes en el estilo de vida y atención coordinada.
  • La identificación temprana de individuos de alto riesgo y la intervención oportuna con tratamientos apropiados son cruciales para mitigar el riesgo de fractura y mejorar los resultados de los pacientes.