2. Academic Validation
  3. The ICAM-1 ligand HRV-A89 is internalized independently of clathrin-mediated endocytosis and its capsid reaches late endosomes

The ICAM-1 ligand HRV-A89 is internalized independently of clathrin-mediated endocytosis and its capsid reaches late endosomes

  • Virology. 2023 May 3;583:45-51. doi: 10.1016/j.virol.2023.04.003.
Beatrix Pfanzagl 1
Affiliations

Affiliation

  • 1 Institute of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Austria. Electronic address: beatrix.pfanzagl@meduniwien.ac.at.
PMID: 37148647 DOI: 10.1016/j.virol.2023.04.003
Abstract

The human rhinovirus (HRV) A2 is endocytosed by clathrin-mediated endocytosis (CME) bound to the classical LDL receptor and releases its RNA during its transport to late endosomes. Here it is shown that - presumably due to an effect on virus recycling - a low concentration of the CME inhibitor chlorpromazine present during virus internalization (30 min) did not reduce HRV-A2 Infection, but strongly inhibited short-time (5 min) endocytosis of HRV-A2. Chlorpromazine had no effect on the colocalization of the ICAM-1 ligand HRV-A89 with early endosomes, excluding CME as the main endocytosis pathway of this virus. As published for HRV-A2 and HRV-A14, HRV-A89 partially colocalized with lysosome-associated membrane protein 2 and the microtubule inhibitor nocodazole did not reduce virus Infection when present only during virus internalization. Together with previous work these data suggest that there are no principal differences between endocytosis pathways of ICAM-1-binding rhinoviruses in different cell types.

Keywords

Arf6; Chlorpromazine; Endocytosis; ICAM-1; Imipramine; Rhinovirus.

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