Cellular Organelles Reorganization During Zika Virus Infection of Human Cells

Area of Science:

• Virology
• Cell Biology
• Molecular Biology

Background:

• Zika virus (ZIKV) causes human infections with neurological complications.
• Flavivirus replication involves host cell membrane and organelle reorganization.
• Organelle dysfunction is linked to various viral diseases.

Purpose of the Study:

• To investigate the impact of ZIKV infection on host cell organelles.
• To evaluate the reorganization of promyelocytic leukemia nuclear bodies (PML-NBs), mitochondria, and lipid droplets (LDs) during ZIKV infection.

Main Methods:

• Infection of human neural progenitor cells (NPCs), Huh-7, and retinal pigment epithelial (RPE) cells with ZIKV (Argentina INEVH116141 strain).
• Fluorescent cell imaging analysis and confocal microscopy to study organelle alterations.

Main Results:

• ZIKV infection significantly reduced the number of PML-NBs.
• Mitochondrial fragmentation and loss of membrane potential were observed in infected RPE cells.
• A decrease in the number and volume of lipid droplets was noted in infected cells.

Conclusions:

• ZIKV infection targets and structurally modifies PML-NBs, mitochondria, and LDs.
• These organelle perturbations may facilitate viral replication by hindering host defense mechanisms.
• Understanding cellular remodeling by ZIKV can inform the development of host-targeted antiviral strategies.