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Related Concept Videos

Cells of the Innate Immune Response01:28

Cells of the Innate Immune Response

The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Autophagy01:27

Autophagy

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.
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Cellular Injury V: Apoptosis and Autophagy01:22

Cellular Injury V: Apoptosis and Autophagy

Cells respond to damage and stress through highly coordinated processes that decide whether they survive or undergo controlled self-destruction. Two major pathways involved in this regulation are apoptosis, a type of programmed cell death, and autophagy, a survival mechanism that helps cells adapt to adverse conditions.ApoptosisApoptosis removes aged or injured cells to maintain tissue balance. During this process, the cell shrinks, chromatin condenses and fragments, and membrane-bound...
Phagocytosis00:41

Phagocytosis

Cells pull particles inward and engulf them in spherical vesicles in an energy-requiring process called endocytosis. Phagocytosis (“cellular eating”) is one of three major types of endocytosis. Cells use phagocytosis to take in large objects—such as other cells (or their debris), bacteria, and even viruses.The objective of phagocytosis is often destruction. Cells use phagocytosis to eliminate unwelcome visitors, like pathogens (e.g., viruses and bacteria). It is perhaps unsurprising, that many...
Phagocytosis00:41

Phagocytosis

Cells pull particles inward and engulf them in spherical vesicles in an energy-requiring process called endocytosis. Phagocytosis ("cellular eating") is one of three major types of endocytosis. Cells use phagocytosis to take in large objects, such as other cells (or their debris), bacteria, and even viruses.
The objective of phagocytosis is often destruction. Cells use phagocytosis to eliminate unwelcome visitors, like pathogens (e.g., viruses and bacteria). Many immune system cells, including...
Phagocytosis of Apoptotic Cells01:17

Phagocytosis of Apoptotic Cells

Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or  immature dendritic cells. Non-professional phagocytes such as  epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes. 
Normal cells contain receptors that prevent them from being recognized by phagocytes.

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Related Experiment Video

Updated: Jul 5, 2026

Silicon Microchips for Manipulating Cell-cell Interaction
23:21

Silicon Microchips for Manipulating Cell-cell Interaction

Published on: August 30, 2007

How cells clean house.

Vojo Deretic1, Daniel J Klionsky

  • 1Molecular genetics and Microbiology Department, University of New Mexico Health Sciences Center, USA.

Scientific American
|May 1, 2008
PubMed
Summary
This summary is machine-generated.

Cellular recycling, known as autophagy, involves engulfing damaged parts and pathogens. Understanding this process through protein signals offers new therapeutic avenues for diseases and aging.

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Area of Science:

  • Cell Biology
  • Molecular Biology

Background:

  • Autophagosomes are cellular organelles that engulf cytoplasmic material, including damaged components and pathogens.
  • This material is then transported to digestive organelles for degradation and recycling, a process termed autophagy.

Purpose of the Study:

  • To elucidate the intricate mechanisms of autophagy by tracing the protein signals that regulate this fundamental cellular process.
  • To explore the therapeutic potential of a comprehensive understanding of autophagy.

Main Methods:

  • Investigating the role of specific protein signals in initiating and controlling autophagosome formation.
  • Analyzing the molecular pathways involved in the transport of autophagosomes to digestive organelles.
  • Utilizing advanced imaging techniques to visualize autophagic flux in real-time.

Main Results:

  • Detailed mapping of key protein signaling cascades that govern autophagy.
  • Identification of novel regulatory proteins involved in autophagosome maturation and cargo recognition.
  • Demonstration of conserved autophagic pathways across different cell types.

Conclusions:

  • A deeper understanding of autophagy mechanisms is crucial for cellular health and homeostasis.
  • Targeting autophagy pathways presents promising therapeutic strategies for cancer, infectious diseases, immune disorders, and neurodegenerative conditions like dementia.
  • Autophagy modulation may hold potential for interventions aimed at slowing the aging process.