ArticleProceedings of the National Academy of Sciences of the United States of America2026
Lamin B receptor upregulation in metastatic melanoma causes nuclear envelope fragility in confined migration during cancer invasion.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Nuclear envelope rupture and resealing: mechanisms, consequences, and disease implications.Biochemical Society transactions · 2026Review
- In vivo DNA damage protection during cell migration across confining embryonic tissue environments.Nature cell biology · 2026Article
- Screening of amphipathic helices identifies features linked to inner nuclear membrane properties.Nature communications · 2026Article
- Weakening the nuclear envelope: Lamin B receptor in melanoma metastasis.Molecular oncology · 2026Article
- Lamin B1 and LAP2β resist cytoskeletal force to maintain lamin A/C meshwork organization and preserve nuclear integrity.Molecular biology of the cell · 2025Article
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Authors and funding
7 authors.
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Abstract
Cancer cells migrate through regions of tissue confinement during metastasis, causing nuclear envelope (NE) rupture, which generates heritable DNA damage and disease aggression. We sought to determine if NE rupture was intrinsic to malignant transformation and seek a mechanistic cause. We found that metastatic cells from multiple cancer subtypes have increased NE fragility in confinement compared to their benign counterparts. Meta-analysis of transcriptomic data from clinical samples of melanoma progression together with an siRNA-based live-cell confinement screen revealed that lamin B receptor (LBR) transcriptional upregulation correlates with melanoma progression and NE fragility. LBR is an inner nuclear membrane protein (INM) that scaffolds lamins and chromatin and has sterol reductase activity in the cholesterol biosynthesis pathway. Applying superresolution and atomic force microscopies to characterize the cellular and biophysical events leading to NE rupture revealed that upregulated LBR increased nuclear deformability and can generate local ruptures of the INM, promoting blebs in the nuclear membrane that burst to release nuclear contents into the cytoplasm. Structure-function analysis showed that LBR's sterol reductase activity is required for its promotion of NE fragility in cells confined in vitro. Use of tumor organoids and an in vivo melanoma model revealed that upregulation of LBR was associated with increased NE fragility, metastatic invasion, and decreased patient survival. Thus, upregulation of LBR in melanoma promotes nuclear deformability, while LBR's sterol reductase activity causes fragility and instability of the nuclear membrane, and these changes in the nucleus provide a possible mechanism for increased genetic heterogeneity in melanomas.
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