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Videos de Conceptos Relacionados

Lysosomes01:31

Lysosomes

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Lysosomes are membrane-enclosed spherical sacs derived from the Golgi apparatus. The most important function of the lysosome is degrading macromolecules and biological polymers that are released during membrane trafficking events such as the secretory, endocytic, autophagic, and phagocytic pathways. The degradation is carried out by several hydrolytic enzymes active in an acidic environment of the lysosomal lumen. These acid hydrolases are involved in cellular processes such as cell signaling,...
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Lysosomal Hydrolases01:22

Lysosomal Hydrolases

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Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
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Delivery Pathways to the Lysosome01:36

Delivery Pathways to the Lysosome

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Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
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Regulation of Stroke Volume01:27

Regulation of Stroke Volume

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The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
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Cardiac Output and Stroke Volume01:11

Cardiac Output and Stroke Volume

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Cardiac output (CO) is an integral aspect of human physiology, reflecting the heart's efficiency and responsiveness to the body's needs. It represents the volume of blood that the left or right ventricle ejects into the aorta or pulmonary trunk each minute. The CO is calculated by multiplying the heart rate (HR)—the number of heartbeats per minute—by the stroke volume (SV)—the amount of blood pumped out with each heartbeat.
In an average resting adult male, the typical cardiac...
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Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

Cardiac Output II: Effect of Stroke Volume on Cardiac Output

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Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
Preload
Preload refers to the initial elongation of the cardiac myocytes before contraction and is related to the volume of blood filling the heart at the end of diastole, or end-diastolic volume. The...
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Video Experimental Relacionado

Updated: Feb 12, 2026

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La activación microglial y la disfunción lisosómica en el ictus hemorrágico.

Chien-Hui Lee1,2, Cheng-Yoong Pang3,4,5, Mei-Jen Wang4

  • 1Department of Neurosurgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan.

Tzu chi medical journal
|February 11, 2026
PubMed
Resumen

El accidente cerebrovascular hemorrágico implica sangrado y daño cerebral. La mejora de la función lisosómica microglial ayuda a eliminar los coágulos sanguíneos y a reducir las lesiones cerebrales para una mejor recuperación.

Palabras clave:
La hemorragia intracerebral es una hemorragia intracerebral.La función lisosomal tiene una función lisosomal.La fagocitosis microglial es una fagocitosis microglial.La neuroinflamación es una inflamación neurológica.

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Área de la Ciencia:

  • La neurociencia es la neurociencia.
  • Inmunología Inmunología.
  • Biología celular Biología celular.

Sus antecedentes:

  • La hemorragia intracerebral (HIC) causa una mortalidad y discapacidad significativas.
  • La lesión cerebral secundaria (SBI) implica inflamación y daño tisular después de la ICH.
  • La microglia, las células inmunes del cerebro, son cruciales para limpiar los restos de hematoma.

Objetivo del estudio:

  • Para revisar el papel de la función lisosomal microglial en el accidente cerebrovascular hemorrágico.
  • Examinar cómo la disfunción lisosomal exacerba el ICH y el SBI.
  • Para resaltar las estrategias terapéuticas dirigidas al eje microglia-lisosoma.

Principales métodos:

  • Revisión de la literatura que se centra en la fagocitosis microglial y las vías lisosómicas en ICH.
  • Análisis del impacto de la función lisosomal en la resolución del hematoma y la neuroinflamación.
  • Exploración de intervenciones terapéuticas dirigidas a mejorar la actividad lisosómica microglial.

Principales resultados:

  • El deterioro de la función lisosomal microglial dificulta el aclaramiento del hematoma y promueve el SBI.
  • La disfunción lisosómica conduce a una inflamación persistente y a un empeoramiento del daño neurológico.
  • La orientación del eje microglia-lisosoma es prometedora para mejorar los resultados de la ECI.

Conclusiones:

  • La función lisosómica microglial es crítica para el manejo del accidente cerebrovascular hemorrágico.
  • La mejora terapéutica de la actividad lisosomal ofrece un nuevo enfoque para el tratamiento de la ICH.
  • La modulación del eje microglia-lisosoma puede mitigar la lesión cerebral secundaria y promover la recuperación.