Nuclear roles for non-lamin intermediate filament proteins

Area of Science:

• Cell Biology
• Molecular Biology
• Biochemistry

Background:

• Nuclear lamins were traditionally considered the sole intermediate filaments (IFs) influencing nuclear structure and function.
• Emerging research reveals significant roles for non-lamin IFs in nuclear regulation across diverse cellular contexts.

Purpose of the Study:

• To review the evidence for non-lamin IF proteins regulating nuclear properties.
• To highlight future research directions in this field.

Main Methods:

• Literature review of recent studies on non-lamin IFs.
• Analysis of experimental data implicating non-lamin IFs in nuclear processes.

Main Results:

• Non-lamin IFs in the cytoplasm, particularly in the perinuclear space, affect nuclear shape and integrity, especially under cellular stress.
• Intranuclear non-lamin IFs are involved in nuclear architecture, chromatin organization, gene expression, cell cycle progression, and DNA damage repair.

Conclusions:

• Non-lamin IFs play multifaceted roles in nuclear regulation beyond the established functions of lamins.
• Further investigation into non-lamin IFs offers significant potential for understanding nuclear biology and disease.