Herpes simplex virus particles interact with chemokines and enhance cell migration

Area of Science:

• Virology
• Immunology
• Molecular Biology

Background:

• Herpes simplex virus types 1 and 2 (HSV-1, HSV-2) are common human pathogens.
• HSV's manipulation of the chemokine network is not fully understood.
• Secreted glycoprotein G (SgG) was previously identified as a viral chemokine-binding protein enhancing chemokine function.

Purpose of the Study:

• To investigate the chemokine-binding capacity of HSV particles.
• To determine the role of envelope glycoprotein G (gG) in HSV-chemokine interactions.
• To understand the functional consequences of HSV-chemokine binding on host cells.

Main Methods:

• Surface plasmon resonance assays were used to measure HSV particle-chemokine binding.
• HSV-1 gG mutant strains were utilized to identify the mediating glycoprotein.
• In vitro assays assessed HSV-induced cell migration.

Main Results:

• HSV particles exhibit high-affinity binding to specific human chemokines.
• HSV glycoprotein G (gG) mediates the interaction between HSV particles and chemokines.
• HSV-2 particles bind chemokines despite gG cleavage, possibly via envelope-associated SgG2 or precursor proteins.
• HSV particles promote cell migration independently of envelope gG-chemokine binding.

Conclusions:

• HSV particles actively engage with the host chemokine system through envelope-bound gG.
• HSV-2 employs distinct mechanisms for chemokine interaction compared to HSV-1.
• HSV utilizes multiple strategies, including gG-dependent and independent pathways, to modulate host immune cell migration.