Related Experiment Video

Updated: Jul 13, 2026

Particle Agglutination Method for Poliovirus Identification
07:06

Particle Agglutination Method for Poliovirus Identification

Published on: April 20, 2011

Poliovirus infection without accumulation of eclipse particles

O Ofori-Anyinam1, R Vrijsen, P Kronenberger

  • 1Department of Microbiology and Hygiene, Vrije Universiteit Brussel, Belgium.

Antiviral Research
|January 1, 1995
PubMed

Insights

Pyridazinamine R 78206 prevents poliovirus particle formation and delays protein synthesis. This suggests poliovirus infection doesn't require intracellular eclipse particles for replication.

Area of Science:

  • Virology
  • Molecular Biology
  • Drug Discovery

Background:

  • Poliovirus replication involves complex assembly of viral particles.
  • The role of intracellular eclipse particles in poliovirus infection is not fully understood.

Purpose of the Study:

  • To investigate the effect of capsid-binding pyridazinamine R 78206 on poliovirus replication.
  • To determine if intracellular accumulation of 135 S eclipse particles is essential for poliovirus infection.

Main Methods:

  • Poliovirus type 1 (Mahoney) was treated with R 78206.
  • HeLa cells were infected with R 78206-pretreated poliovirus.
  • Viral protein synthesis and progeny virus formation were monitored.

Main Results:

  • R 78206 completely inhibited the formation of intra- and extracellular modified poliovirus particles.
  • A small amount of empty capsids was observed.
  • Viral protein synthesis and first-cycle progeny virus production were delayed by approximately 1 hour.

Conclusions:

  • The capsid-binding compound R 78206 effectively disrupts poliovirus particle assembly.
  • Poliovirus infection can proceed without the intracellular accumulation of 135 S eclipse particles, challenging previous hypotheses.

More Related Videos

A Liquid Phase Affinity Capture Assay Using Magnetic Beads to Study Protein-Protein Interaction: The Poliovirus-Nanobody Example08:10

A Liquid Phase Affinity Capture Assay Using Magnetic Beads to Study Protein-Protein Interaction: The Poliovirus-Nanobody Example

Published on: May 29, 2012

EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. II. Total Culturable Virus Assay11:09

EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. II. Total Culturable Virus Assay

Published on: September 11, 2016

Related Concept Videos

Subviral Agents01:29

Subviral Agents

Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...
Poliomyelitis01:17

Poliomyelitis

Poliomyelitis is caused by poliovirus, a small, non-enveloped, positive-sense RNA virus of the Picornaviridae family and Enterovirus genus. Transmission occurs primarily via the fecal-oral route, often through ingestion of contaminated water or food. The virus initially replicates in the oropharynx and intestinal mucosa, particularly in lymphoid tissues such as the tonsils, Peyer’s patches, and regional lymph nodes. Primary viremia follows, allowing dissemination throughout the body.In most...
Arboviral Encephalitis01:25

Arboviral Encephalitis

Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...
Cytomegalovirus Disease01:27

Cytomegalovirus Disease

Cytomegalovirus (CMV) disease is caused by human cytomegalovirus, a double-stranded DNA virus of the Herpesviridae family. While primary CMV infection is often asymptomatic in immunocompetent individuals, the virus can cause severe disease in neonates and immunocompromised patients. CMV is the most common cause of congenital viral infection in the United States, and a major pathogen in solid organ and hematopoietic stem cell transplant recipients.CMV is transmitted via bodily fluids, sexual...
Encephalitis l: Introduction01:19

Encephalitis l: Introduction

Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...
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...