Subtopic Deep Dive

Nuclear Lamins Function
Research Guide

What is Nuclear Lamins Function?

Nuclear lamins are intermediate filament proteins forming the nuclear lamina meshwork that provides mechanical support to the nuclear envelope, tethers chromatin, and regulates gene expression.

A-type lamins (lamin A/C) and B-type lamins assemble into a filamentous network underlying the inner nuclear membrane (Aebi et al., 1986, 974 citations; Gerace and Blobel, 1980, 959 citations). They undergo reversible depolymerization during mitosis and interact with the LINC complex for nucleo-cytoplasmic coupling (Crisp et al., 2005, 1325 citations). Mutations in LMNA cause laminopathies including Hutchinson-Gilford progeria syndrome (HGPS) and Emery-Dreifuss muscular dystrophy (Eriksson et al., 2003, 2153 citations; Bonne et al., 1999, 1330 citations). Over 20 key papers span 1980-2013.

Curated Papers

Key Challenges

Why It Matters

Nuclear lamins maintain nuclear shape and integrity, with deficiencies causing defective mechanotransduction and altered nuclear architecture in diseases like HGPS and dilated cardiomyopathy (Lammerding et al., 2004, 898 citations; Goldman et al., 2004, 1098 citations). Lamin A/C mutations lead to missense changes in the rod domain, resulting in conduction-system disease (Fatkin et al., 1999, 1334 citations). Lamins sequentially tether peripheral heterochromatin with LBR, inversely regulating cell differentiation (Solovei et al., 2013, 802 citations). These functions link nuclear mechanics to aging and muscle disorders.

Key Research Challenges

Lamin Mutation Mechanisms

Point mutations in LMNA produce progerin (LAΔ50), causing progressive nuclear blebbing in HGPS (Goldman et al., 2004). Rod domain missense mutations selectively disrupt cardiomyopathy without Emery-Dreifuss dystrophy (Fatkin et al., 1999). Challenges persist in linking specific mutations to tissue-specific phenotypes (Lammerding et al., 2004).

Nuclear Mechanics Defects

Lamin A/C deficiency impairs nuclear stiffness and mechanotransduction under shear stress (Lammerding et al., 2004). LINC complex mutations decouple nucleus-cytoplasm force transmission (Crisp et al., 2005). Quantifying these effects in vivo remains difficult.

Chromatin Tethering Dynamics

Lamins and LBR sequentially anchor peripheral heterochromatin, with inverse roles in differentiation (Solovei et al., 2013). Polymer dynamics and depolymerization during mitosis complicate tethering models (Gerace and Blobel, 1980; Aebi et al., 1986). Resolving these interactions requires advanced imaging.

Essential Papers

Recurrent de novo point mutations in lamin A cause Hutchinson–Gilford progeria syndrome

Maria Eriksson, W. Ted Brown, Leslie B. Gordon et al. · 2003 · Nature · 2.2K citations

Missense Mutations in the Rod Domain of the Lamin A/C Gene as Causes of Dilated Cardiomyopathy and Conduction-System Disease

Diane Fatkin, Calum A. MacRae, Takeshi Sasaki et al. · 1999 · New England Journal of Medicine · 1.3K citations

Genetic defects in distinct domains of the nuclear-envelope proteins lamin A and lamin C selectively cause dilated cardiomyopathy with conduction-system disease or autosomal dominant Emery-Dreifuss...

Mutations in the gene encoding lamin A/C cause autosomal dominant Emery-Dreifuss muscular dystrophy

Gisèle Bonne, Marina Raffaele di Barletta, Shaïda Varnous et al. · 1999 · Nature Genetics · 1.3K citations

Coupling of the nucleus and cytoplasm: Role of the LINC complex

Melissa Crisp, Qian Liu, Kyle J. Roux et al. · 2005 · The Journal of Cell Biology · 1.3K citations

The nuclear envelope defines the barrier between the nucleus and cytoplasm and features inner and outer membranes separated by a perinuclear space (PNS). The inner nuclear membrane contains specifi...

Accumulation of mutant lamin A causes progressive changes in nuclear architecture in Hutchinson–Gilford progeria syndrome

Robert D. Goldman, Dale K. Shumaker, Michael R. Erdos et al. · 2004 · Proceedings of the National Academy of Sciences · 1.1K citations

Hutchinson–Gilford progeria syndrome (HGPS) is a premature aging disorder, commonly caused by a point mutation in the lamin A gene that results in a protein lacking 50 aa near the C terminus, denot...

The nuclear lamina is a meshwork of intermediate-type filaments

Ueli Aebi, Julie Cohn, Loren Buhle et al. · 1986 · Nature · 974 citations

The nuclear envelope lamina is reversibly depolymerized during mitosis

Larry Gerace, Günter Blobel · 1980 · Cell · 959 citations

Reading Guide

Foundational Papers

Start with Aebi et al. (1986, 974 citations) and Gerace and Blobel (1980, 959 citations) for lamina structure and mitotic depolymerization, then Eriksson et al. (2003, 2153 citations), Fatkin et al. (1999), and Bonne et al. (1999) for disease foundations.

Recent Advances

Study Solovei et al. (2013, 802 citations) for lamin-LBR heterochromatin roles; Lammerding et al. (2004, 898 citations) and Goldman et al. (2004, 1098 citations) for mechanics and progeria architecture.

Core Methods

Intermediate filament assembly assays (Aebi et al., 1986); EM/light microscopy for architecture (Goldman et al., 2004); micropipette aspiration and shear assays for mechanics (Lammerding et al., 2004); LINC complex perturbations (Crisp et al., 2005).

How PapersFlow Helps You Research Nuclear Lamins Function

Discover & Search

Research Agent uses searchPapers('nuclear lamins function laminopathies') to retrieve Eriksson et al. (2003) as top result (2153 citations), then citationGraph to map connections to Fatkin et al. (1999) and Bonne et al. (1999), and findSimilarPapers to uncover Lammerding et al. (2004) on mechanics.

Analyze & Verify

Analysis Agent applies readPaperContent on Goldman et al. (2004) to extract LAΔ50 nuclear architecture data, verifyResponse with CoVe to confirm mutation effects against Eriksson et al. (2003), and runPythonAnalysis to plot citation networks or quantify lamin filament metrics from abstracts using pandas.

Synthesize & Write

Synthesis Agent detects gaps in lamin-chromatin tethering post-Solovei et al. (2013), flags contradictions between LINC mechanics (Crisp et al., 2005) and lamina meshwork models (Aebi et al., 1986); Writing Agent uses latexEditText for figure legends, latexSyncCitations to integrate 10 papers, and latexCompile for a review manuscript with exportMermaid diagrams of lamin polymerization.

Use Cases

"Analyze nuclear stiffness data from lamin A/C knockout models"

Research Agent → searchPapers → Analysis Agent → runPythonAnalysis (pandas/matplotlib to plot stress-strain curves from Lammerding et al., 2004 data) → researcher gets quantified mechanics graphs and GRADE-scored verification.

"Draft laminopathy review with HGPS figures"

Synthesis Agent → gap detection on Eriksson/Goldman papers → Writing Agent → latexGenerateFigure (progerin blebbing), latexSyncCitations (10 papers), latexCompile → researcher gets compiled LaTeX PDF with citations.

"Find code for lamin filament simulations"

Research Agent → paperExtractUrls (from Aebi et al., 1986 citing papers) → paperFindGithubRepo → githubRepoInspect → researcher gets Python scripts modeling intermediate filament dynamics.

Automated Workflows

Deep Research workflow scans 50+ lamin papers via searchPapers chains, producing a structured report on laminopathies with GRADE grading (Eriksson et al., 2003 as anchor). DeepScan applies 7-step CoVe analysis to verify mechanotransduction claims from Lammerding et al. (2004) against LINC data (Crisp et al., 2005). Theorizer generates hypotheses on lamin-LBR heterochromatin switching from Solovei et al. (2013).

Try Doxa for Nuclear Lamins Function Research

Frequently Asked Questions

What defines nuclear lamins function?

Nuclear lamins form a meshwork of intermediate filaments supporting the nuclear envelope, tethering chromatin, and enabling mechanotransduction (Aebi et al., 1986; Gerace and Blobel, 1980).

What methods study lamin dynamics?

Electron microscopy visualizes lamina meshworks (Aebi et al., 1986); light/EM track progerin-induced blebs (Goldman et al., 2004); micromechanical assays measure nuclear stiffness (Lammerding et al., 2004).

What are key papers on laminopathies?

Eriksson et al. (2003, 2153 citations) identifies LMNA mutations in HGPS; Fatkin et al. (1999, 1334 citations) links rod mutations to cardiomyopathy; Bonne et al. (1999, 1330 citations) to Emery-Dreifuss dystrophy.

What open problems exist?

Tissue-specific effects of identical LMNA mutations; precise lamin-chromatin tethering mechanisms beyond LBR (Solovei et al., 2013); in vivo quantification of LINC-lamina force transmission (Crisp et al., 2005).