Related Experiment Video
Updated: Jul 23, 2025
10:25
Dual-color Correlative Light and Electron Microscopy for the Visualization of Interactions between Mitochondria and Lysosomes
Published on: September 27, 2024
669
Pathophysiology of Lysosomes in a Nutshell.
1Laboratory of Molecular Pathology and NanoBioImaging, Department of Health Sciences, Università del Piemonte Orientale, 28100 Novara, Italy.
International Journal of Molecular Sciences
|July 14, 2023
Summary
Lysosomes are vital acidic organelles in mammalian cells. Their function is crucial for cellular health and waste removal.
Area of Science:
- Cell Biology
- Organelle Function
- Mammalian Physiology
Background:
- Lysosomes are key acidic organelles found in all nucleated mammalian cells.
- These organelles play a critical role in cellular waste disposal and recycling.
- Understanding lysosome function is essential for comprehending cellular homeostasis.
Discussion:
- The acidic environment within lysosomes is maintained by the V-ATPase proton pump.
- Lysosomal enzymes function optimally at low pH, facilitating degradation of various substrates.
- Disruptions in lysosome acidity can lead to cellular dysfunction and disease.
Key Insights:
- The study highlights the fundamental importance of lysosomal acidity for proper cellular function.
- Specific mechanisms maintaining lysosome pH are critical for enzyme activity.
- Impaired lysosome function is linked to various lysosomal storage diseases.
Outlook:
- Further research into lysosome acidification could reveal therapeutic targets for metabolic and neurodegenerative disorders.
- Investigating the dynamic regulation of lysosome pH offers new avenues for disease intervention.
- Exploring the interplay between lysosome function and other cellular pathways is warranted.
Related Concept Videos
01:22Lysosomal Hydrolases
3.8K
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,...
3.8K
01:31Lysosomes
19.2K
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,...
19.2K
01:36Delivery Pathways to the Lysosome
6.6K
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...
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
6.6K
01:27Autophagy
4.4K
Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
4.4K
01:28Maturation of Endosomes
4.3K
The early endosome containing internalized molecules matures through transformations in its location, morphology, intraluminal pH, and membrane protein composition. Together, these changes result in a more acidic late endosome that contains multiple intraluminal vesicles; therefore, the late endosome is also called a multivesicular body (MVB).
Changes in location
The maturing endosome moves along microtubules from the periphery of the cell towards the perinuclear region. This movement of the...
Changes in location
The maturing endosome moves along microtubules from the periphery of the cell towards the perinuclear region. This movement of the...
4.3K
01:13The Proteasome
903
Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
903