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Related Concept Videos

Lysosomes01:31

Lysosomes

26.5K
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

4.9K
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...
4.9K
Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

Cardiac Output II: Effect of Stroke Volume on Cardiac Output

3.5K
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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Related Experiment Video

Updated: Feb 12, 2026

Using Zebrafish Larvae to Study the Pathological Consequences of Hemorrhagic Stroke
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Using Zebrafish Larvae to Study the Pathological Consequences of Hemorrhagic Stroke

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Microglial activation and lysosomal dysfunction in hemorrhagic stroke.

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
Summary

Hemorrhagic stroke involves brain bleeding and damage. Enhancing microglial lysosomal function aids in clearing blood clots and reducing brain injury for better recovery.

Keywords:
Intracerebral hemorrhageLysosomal functionMicroglial phagocytosisNeuroinflammation

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A Murine Model of Subarachnoid Hemorrhage
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A Murine Model of Subarachnoid Hemorrhage
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Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • Intracerebral hemorrhage (ICH) causes significant mortality and disability.
  • Secondary brain injury (SBI) involves inflammation and tissue damage post-ICH.
  • Microglia, the brain's immune cells, are crucial for clearing hematoma debris.

Purpose of the Study:

  • To review the role of microglial lysosomal function in hemorrhagic stroke.
  • To examine how lysosomal dysfunction exacerbates ICH and SBI.
  • To highlight therapeutic strategies targeting the microglia-lysosome axis.

Main Methods:

  • Literature review focusing on microglial phagocytosis and lysosomal pathways in ICH.
  • Analysis of the impact of lysosomal function on hematoma resolution and neuroinflammation.
  • Exploration of therapeutic interventions aimed at enhancing microglial lysosomal activity.

Main Results:

  • Impaired microglial lysosomal function hinders hematoma clearance and promotes SBI.
  • Lysosomal dysfunction leads to persistent inflammation and worsened neurological damage.
  • Targeting the microglia-lysosome axis shows promise for improving ICH outcomes.

Conclusions:

  • Microglial lysosomal function is critical for managing hemorrhagic stroke.
  • Therapeutic enhancement of lysosomal activity offers a novel approach to ICH treatment.
  • Modulating the microglia-lysosome axis can mitigate secondary brain injury and promote recovery.