Adipocyte Plasma Membrane Protein (APMAP) promotes JC Virus (JCPyV) infection in human glial cells

Area of Science:

• Neurovirology
• Molecular Biology
• Immunology

Background:

• Progressive multifocal leukoencephalopathy (PML) is a severe demyelinating disease of the central nervous system.
• PML is caused by the JCPyV polyomavirus, typically in immunosuppressed individuals.
• The precise mechanisms of JCPyV glial cell infection remain incompletely understood.

Purpose of the Study:

• To identify host cell factors modulating JCPyV infection.
• To investigate the role of N-glycosylated proteins in JCPyV pathogenesis.
• To elucidate the function of Adipocyte Plasma Membrane Associated Protein (APMAP) in JCPyV infection.

Main Methods:

• Screening for N-glycosylated proteins involved in JCPyV pathology.
• Utilizing small interfering siRNA and CRISPR-Cas9 gene editing to deplete APMAP.
• Assessing JCPyV infection levels in APMAP-modified cells.
• Evaluating viral susceptibility in APMAP knockout cell lines with exogenous APMAP expression.

Main Results:

• Adipocyte Plasma Membrane Associated Protein (APMAP) was identified as a host cell modulator of JCPyV infection.
• Depletion of APMAP using siRNA or CRISPR-Cas9 significantly reduced JCPyV infection.
• Restoration of APMAP expression in knockout cells rescued susceptibility to JCPyV infection.
• These findings indicate that APMAP is crucial for glial cell infection by JCPyV.

Conclusions:

• APMAP is a critical host factor supporting JCPyV infection in glial cells.
• Targeting APMAP may offer a novel therapeutic strategy for managing JCPyV-associated diseases like PML.
• Further research into APMAP's specific molecular interactions with JCPyV is warranted.