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Related Concept Videos

Immune Response Against Viral Pathogens01:29

Immune 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...
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Complement System

The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a membrane...
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Viral 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.
Encephalitis ll: Pathophysiology01:26

Encephalitis 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...
Viral Recombination00:57

Viral Recombination

Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
Retroviruses02:33

Retroviruses

Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...

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Combined Genetic and Chemical Capsid Modifications of Adenovirus-Based Gene Transfer Vectors for Shielding and Targeting
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Complement and viral pathogenesis.

Kristina A Stoermer1, Thomas E Morrison

  • 1Department of Microbiology, University of Colorado School of Medicine, Aurora, CO 80045, USA.

Virology
|February 5, 2011
PubMed
Summary
This summary is machine-generated.

The complement system, crucial for fighting infections, can also worsen diseases when its functions are dysregulated. Recent research reveals its key role in the pathology of viral infections.

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Area of Science:

  • Immunology
  • Virology
  • Molecular Biology

Background:

  • The complement system is a vital part of innate immunity, essential for pathogen clearance and immune regulation.
  • Dysregulation of complement activation contributes to various diseases, including autoimmune and infectious conditions.

Purpose of the Study:

  • To review recent discoveries on the complement system's role in viral infection pathogenesis.
  • To highlight the dual role of complement as both protective and pathogenic in viral infections.

Main Methods:

  • Literature review of recent studies on complement and viral infections.
  • Analysis of molecular mechanisms linking complement activation to viral pathogenesis.

Main Results:

  • The complement system plays critical roles in multiple stages of viral infections.
  • Specific complement pathways and products are implicated in viral entry, spread, and immune evasion.
  • Complement dysregulation exacerbates viral disease severity and pathology.

Conclusions:

  • The complement system is a significant factor in the pathogenesis of viral infections.
  • Targeting complement pathways may offer novel therapeutic strategies for viral diseases.
  • Further research is needed to fully elucidate complement's complex interactions in virology.