Alterations in nuclear matrix structure after adenovirus infection

Area of Science:

• Cell Biology
• Virology
• Microscopy

Background:

• Adenovirus serotype 2 infection impacts host cell nuclear organization.
• Understanding these nuclear rearrangements is crucial for viral replication mechanisms.

Purpose of the Study:

• To investigate the morphological changes in nuclear matrix and cytoskeleton of HeLa cells post-adenovirus infection.
• To elucidate the role of nuclear structures in adenovirus replication.

Main Methods:

• Gentle cell extraction and embedment-free section electron microscopy were employed.
• HeLa cells were analyzed at various time points (6, 13, 28, 44 h) after infection.

Main Results:

• Chromatin condensed, and virus-related inclusions formed within the nuclear matrix.
• Filaments within virus centers were decorated with viral capsids, suggesting assembly and transport roles.
• Nuclear lamina became crenated, and the perinuclear cytoskeleton rearranged.

Conclusions:

• Adenovirus infection induces significant rearrangements of the nuclear matrix and cytoskeleton.
• Proposed that nuclear structures facilitate viral capsid assembly, storage, and transport.
• Nuclear and cytoskeletal alterations are essential for supporting adenovirus replication.