Related Experiment Video
Updated: Aug 11, 2025
Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
Published on: March 2, 2014
Molluscum Contagiosum Virus Evasion of Immune Surveillance: A Review
Background:
Molluscum contagiosum (MC) is an acute infection caused by the molluscum contagiosum virus (MCV) with a worldwide incidence of approximately 8,000 cases per 100,000 individuals annually. Greater than 90% of MC cases occur in the pediatric population, and affected adults are more likely to be younger or immunocompromised. MC has minimal inflammation initially; however, a strong inflammatory response can occur during resolution of the infection, termed the beginning of the end (BOTE). MC infections may last months to years, and it is hypothesized that persistent infections may be due to suppression of immunity by MCV proteins, thus affecting MC’s clinical progression.
Objective:
We reviewed the current proposed mechanisms of MCV immune evasion and discuss potential therapeutic options for MC treatment.
Methods:
A literature search was conducted using electronic databases (Pubmed, Google Scholar, Medline).
Results:
We compiled 18 original research articles and identified 11 proteins produced by MCV that are postulated to participate in evasion of host immunity through various molecular pathways. These proteins and/or their downstream pathways may be influenced by MC treatments in phase 3 development, including berdazimer gel 10.3% and VP-102 cantharidin, 0.7%.
Conclusion:
MCV is distinctive in evading immune surveillance by inhibiting or dampening several immune pathways via the production of viral proteins. The result is decreasing local inflammatory response which contributes to the prolonged survival of MCV in the epidermis. Persistent MC can be a nuisance for some patients and treatment may be desired. Currently, no treatment has been approved by the US Food and Drug Administration (FDA). Two approaches in the pipeline may affect the immune avoidance mechanisms; nevertheless, their exact mechanisms between the potential therapeutics and viral proteins remain enigmatic. J Drugs Dermatol. 2023;22(2):182-189. doi:10.36849/JDD.7230.
Insights
Molluscum contagiosum virus (MCV) evades the immune system using viral proteins, leading to prolonged skin infections. New treatments aim to disrupt these immune evasion mechanisms.
Area of Science:
- Dermatology
- Virology
- Immunology
Background:
- Molluscum contagiosum (MC) is a common viral skin infection, primarily affecting children, caused by the molluscum contagiosum virus (MCV).
- MC infections can persist for months to years, potentially due to MCV's ability to suppress the host immune response.
- While often self-limiting, MC can cause significant discomfort and cosmetic concerns, especially in adults or immunocompromised individuals.
Conclusions:
- MCV employs a unique strategy to evade immune surveillance by downregulating critical immune pathways via viral proteins.
- This immune suppression results in reduced local inflammation, facilitating prolonged viral survival in the epidermis.
- While new treatments show promise in targeting immune evasion, their precise mechanisms of action against viral proteins require further elucidation.
Related Concept Videos
01:29Immune Response Against Viral Pathogens
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...
01:40Cell-mediated Immune Responses
01:27Cytotoxic T Cells-mediated Immune Response
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
01:31Defense Against Bacterial Pathogens
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
01:25Immune Surveillance by NK Cells and Phagocytes
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
01:26Defense Mechanism Against Infection
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...