Related Experiment Video
Updated: Jul 5, 2026
09:10
siRNA Electroporation to Modulate Autophagy in Herpes Simplex Virus Type 1-Infected Monocyte-Derived Dendritic Cells
Published on: October 28, 2019
Autophagy and viral neurovirulence
Anthony Orvedahl1, Beth Levine
1Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
Cellular Microbiology
|May 28, 2008
Summary
Neurons utilize autophagy, a cellular degradation process, to combat viral infections and prevent self-destruction. Viral interference with autophagy can lead to neurodegeneration and encephalitis.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- Autophagy is a cellular lysosomal degradation pathway with roles in stress adaptation, cellular turnover, and innate immunity.
- Neurons, as terminally differentiated cells, possess specialized mechanisms for antiviral defense.
- Autophagy plays a crucial role in neuronal innate immunity against intracellular pathogens, including viruses.
Purpose of the Study:
- To review the role of autophagy in neuronal antiviral defense.
- To discuss the relationship between autophagy and viral neurovirulence.
- To explore how viruses antagonize autophagy in neurons.
Main Methods:
- Literature review of studies on autophagy, viral infections, and neuroprotection.
- Analysis of in vivo evidence for autophagy's antiviral role in neurons.
- Examination of viral strategies to evade autophagy.
Main Results:
- Autophagy acts as a neuronal defense mechanism against viruses like Sindbis virus and herpes simplex virus type 1 (HSV-1).
- Viral evasion of autophagy is critical for the pathogenesis of neurotropic viral infections, such as HSV-1-induced encephalitis.
- Disruption of autophagy by viruses can result in neuronal dysfunction and cell death.
Conclusions:
- Autophagy is essential for neuronal survival and protection against viral infections.
- Viral antagonism of autophagy contributes to neurovirulence and disease progression.
- Targeting autophagy pathways may offer therapeutic strategies for viral neurological diseases.
Related Concept Videos
01:29Immune Response Against Viral Pathogens
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
01:26Encephalitis ll: Pathophysiology
Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...
01:10Intracellular Movement of Viruses and Bacteria
Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a virus that...
01:36Delivery Pathways to the Lysosome
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...
01:27Autophagy
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,...
00:56Viral Structure
Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.