The nuclear envelope, a key structure in cellular integrity and gene expression.

Area of Science:

• Cell Biology
• Genetics
• Molecular Biology

Background:

• The nuclear envelope, particularly nuclear lamins, is crucial for cellular structure and function.
• Mutations in nuclear envelope components, especially nuclear lamins, are associated with various clinical syndromes.
• Nuclear lamins are key structural proteins involved in organizing chromatin and regulating nuclear processes.

Purpose of the Study:

• To review the structure and functions of nuclear lamins.
• To discuss the spectrum of syndromes caused by nuclear envelope defects.
• To explore pathogenic concepts unifying these disorders.

Main Methods:

• Literature review of nuclear lamins, nuclear envelope disorders, and laminopathies.
• Analysis of the relationship between nuclear envelope integrity, aging, and metabolism.
• Synthesis of current understanding of the molecular basis of laminopathies.

Main Results:

• Nuclear lamins form a filamentous network essential for nuclear and cellular integrity.
• Defects in nuclear lamins (encoded by LMNA gene) cause diverse phenotypes including muscle disease, lipodystrophy, and premature aging.
• Laminopathies highlight the link between nuclear envelope integrity, metabolism, and longevity.

Conclusions:

• The nuclear envelope and its components, particularly nuclear lamins, are vital for maintaining cellular health and organismal longevity.
• Mutations in nuclear lamins lead to a range of laminopathies, underscoring the importance of nuclear envelope integrity.
• Research into nuclear lamins and associated disorders provides insights into aging and metabolic regulation.