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Related Experiment Video

Updated: May 13, 2026

An In vitro Model to Study Immune Responses of Human Peripheral Blood Mononuclear Cells to Human Respiratory Syncytial Virus Infection

An In vitro Model to Study Immune Responses of Human Peripheral Blood Mononuclear Cells to Human Respiratory Syncytial Virus Infection

Published on: December 10, 2013

RSV fusion: time for a new model.

Peter Mastrangelo¹, Richard G Hegele

¹Department of Laboratory Medicine and Pathobiology, University of Toronto, Ontario, M5S 1A8, Canada. peter.mastrangelo@utoronto.ca

|March 23, 2013

Summary

This review proposes a model for respiratory syncytial virus (RSV) cell entry, highlighting nucleolin as a key fusion receptor. This discovery opens new avenues for developing RSV therapies and understanding infection.

Area of Science:

Virology
Cell Biology
Molecular Medicine

Background:

Respiratory syncytial virus (RSV) infection is a major global health concern, particularly for infants and the elderly.
Understanding the precise mechanisms of RSV cell entry is crucial for developing effective antiviral strategies.
Previous models of RSV entry focused on attachment and fusion, but the specific cellular fusion receptor remained elusive.

Purpose of the Study:

To propose a partially hypothetical model for respiratory syncytial virus (RSV) binding and cellular entry.
To incorporate the recently identified nucleolin as a functional fusion receptor for RSV.
To stimulate further research into RSV-host interactions and pathobiology.

Main Methods:

This study is a review, synthesizing existing knowledge and presenting a novel hypothetical model.

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It integrates findings on RSV attachment (G protein, cellular glycoproteins/heparin) and fusion (F protein).

The model specifically incorporates the newly discovered role of nucleolin as a cellular fusion receptor.

Main Results:

RSV cell entry is proposed as a two-step process: initial attachment and subsequent membrane fusion.
Electrostatic interactions involving the viral G protein and cellular components may facilitate attachment.
Nucleolin is identified as a functional cellular fusion receptor, mediating the fusion step via the viral F protein.

Conclusions:

The discovery of nucleolin as an RSV fusion receptor offers new possibilities for developing prophylactic and therapeutic interventions.
This model provides a framework for future research into RSV tropism and pathogenesis.
Further investigation is warranted to validate and refine this proposed model of RSV cell entry.