| 1995 |
LMNB1 encodes an intermediate filament protein of the nuclear envelope whose transcription unit spans >45 kb and is organized into 11 exons: exon 1 codes for the amino-terminal head domain and first portion of the central rod domain, exons 2–6 code the central rod domain, and exons 7–11 code the carboxyl-terminal tail domain. Intron positions are conserved with other vertebrate lamin genes and most cytoplasmic intermediate filament protein genes. |
Genomic cloning and structural analysis of the human LMNB1 gene |
Genomics |
High |
7557986 8586436
|
| 1995 |
The mouse Lmnb1 gene spans ~43 kb and consists of 11 exons and 10 introns with conserved exon/intron organization shared among intermediate filament protein family genes. The presumptive promoter has high GC content, a CAAT box, and multiple SP1 sites but no classical TATA box, indicating a housekeeping gene promoter with a CpG island. |
Genomic cloning and structural analysis of the mouse Lmnb1 gene |
Genomics |
High |
8586436
|
| 2013 |
LMNB1 duplications in ADLD are intrachromosomal, non-recurrent, and arise through nonhomologous end joining or replication-based mechanisms (fork stalling and template switching / microhomology-mediated break-induced repair). The minimal duplicated region sufficient for disease was defined. All three LMNB1 alleles in ADLD patients show equal expression, indicating regulatory regions are maintained within the rearranged segment. |
Detailed molecular analysis of LMNB1 duplication junctions at nucleotide level; allele-specific expression analysis in patients' fibroblasts |
Human mutation |
High |
23649844
|
| 2013 |
A missense variant A436T in LMNB1 (identified in NTD patients) was shown by fluorescence loss in photobleaching (FLIP) to compromise the stability of lamin B1 interaction within the nuclear lamina. |
Fluorescence loss in photobleaching (FLIP) analysis of LMNB1 A436T variant in cells |
Birth defects research. Part A, Clinical and molecular teratology |
Medium |
23733478
|
| 2020 |
De novo missense mutations in LMNB1 cause impaired formation of the nuclear lamina. Two variants in the head group domain reduce nuclear localization of the protein and increase misshapen nuclei. A variant in the coil region leads to increased frequency of condensed nuclei and lower steady-state levels of lamin B1 in proband lymphoblasts. |
Functional analysis of LMNB1 missense mutations by immunofluorescence/nuclear morphology assays and immunoblotting in patient lymphoblasts and transfected cells |
American journal of human genetics |
High |
32910914
|
| 2021 |
In DYT1 dystonia (TOR1A heterozygous mutation), LMNB1 is upregulated and exhibits abnormal subcellular distribution (nuclear-to-cytoplasmic mislocalization) specifically in cholinergic motor neurons. This dysregulation is causally linked to disease phenotypes (reduced neurite length, thickened nuclear lamina, disrupted nuclear morphology, impaired nucleocytoplasmic transport), as shRNA-mediated downregulation of LMNB1 largely ameliorates all cellular defects in DYT1 motor neurons. |
Human patient-specific motor neurons from iPSCs and direct conversion; shRNA knockdown of LMNB1; immunofluorescence; nucleocytoplasmic transport assays |
The Journal of neuroscience |
High |
33468570
|
| 2021 |
LMNB1, as a component of the nuclear lamina, anchors heterochromatin and associates with transcription regulation, and its expression is upregulated with nuclear-to-cytoplasmic mislocalization in DYT1 dystonia neurons, as confirmed by GFP::LMNB1 CRISPR knockin iPSC modeling. |
CRISPR/Cas9 GFP::LMNB1 knockin iPSC line establishment; fluorescence co-localization |
Stem cell research |
Low |
34438319
|
| 2022 |
Knockdown of LMNB1 in lung adenocarcinoma cells decreases H3K9me3 protein expression, increases chromosome accessibility (by ATAC-seq), increases p53, p21, p16, and γ-H2AX expression, and increases senescence-positive cells, indicating that LMNB1 maintains heterochromatin compaction and suppresses DNA damage responses and cellular senescence. |
siRNA knockdown; ATAC-seq; immunofluorescence; immunoblotting; in vivo xenograft |
Frontiers in oncology |
Medium |
35712471
|
| 2023 |
LMNB1 directly interacts with the HBV enhancer II/basic core promoter (EnhII/BCP) DNA, as demonstrated by DNA pull-down assay. Overexpression of LMNB1 inhibits HBV promoter activity. ENPP1 interacts with LMNB1 and increases acetylation of LMNB1 at residues K111 and K261; LMNB1 acetylation mutants (111R, 261Q, 261R, 483Q, 483R) show increased HBV promoter activity, indicating that acetylation of LMNB1 at these sites is required for its transcriptional repression of HBV. |
DNA pull-down assay; luciferase reporter assay with HBV promoter/mutant constructs; acetylation site mutagenesis; ENPP1 overexpression/knockdown |
Archives of virology |
Medium |
38265511
|
| 2023 |
LMNB1 knockdown in ovarian cancer cells inhibits proliferation and migration by suppressing FGF1-mediated PI3K-Akt signaling pathway, as revealed by RNA-seq followed by functional validation. |
Stable LMNB1 knockdown; RNA-seq; CCK8, wound healing, transwell assays; xenograft models |
Experimental cell research |
Low |
37003558
|
| 2023 |
MDM2 (an E3 ubiquitin ligase) increases p53 ubiquitination, which activates LMNB1 expression. METTL3-mediated m6A methylation of MDM2 mRNA stabilizes it via YTHDF1, thereby increasing MDM2 translation and downstream LMNB1 upregulation. Knockdown of LMNB1, MDM2, or METTL3 reduces mitochondrial damage and ferroptosis markers in LPS-treated kidney tubular epithelial cells. |
Gain/loss-of-function experiments; m6A methylation assays; co-immunoprecipitation; ubiquitination assays; in vivo CLP mouse model |
European journal of medicinal chemistry |
Medium |
37542992
|
| 2024 |
WTAP promotes LMNB1 expression through m6A methylation modification of LMNB1 mRNA, as verified by meRIP assay, RIP assay, dual-luciferase reporter assay, and actinomycin D mRNA stability assay. LMNB1 in turn activates NF-κB and JAK2/STAT3 signaling pathways to promote inflammation and ferroptosis in kidney tubular epithelial cells. |
meRIP assay; RIP assay; dual-luciferase reporter assay; actinomycin D stability assay; western blot; flow cytometry; CLP mouse model |
Journal of bioenergetics and biomembranes |
Medium |
38517565
|
| 2024 |
LMNB1 promotes HCC cell proliferation by regulating CDKN1A (p21) expression, as shown by ChIP assay and pathway enrichment analysis with functional rescue experiments. |
LMNB1 knockdown; ChIP assay; gene ontology/pathway enrichment analysis; in vitro and in vivo proliferation assays |
Current cancer drug targets |
Low |
38778606
|
| 2024 |
In autosomal dominant leukodystrophy (ADLD), classical ADLD is caused by intra-TAD duplications of LMNB1 resulting in a simple gene dose gain, while atypical ADLD results from inter-TAD deletions or duplications causing LMNB1 forebrain-specific misexpression by disrupting topologically associating domain (TAD) boundaries. Astrocytes are identified as key cellular players in ADLD pathology. |
High-throughput chromosome conformation capture (Hi-C); RNA sequencing; histopathological analysis of postmortem brain tissues; clinical/neuroradiological investigation of >20 families |
Annals of neurology |
High |
39078102
|
| 2024 |
LMNB1 knockdown in glioma cells reduces phosphorylation of Akt1/2/3 and expression of PI3K, AKT, and p-AKT proteins, placing LMNB1 upstream of the PI3K/Akt signaling pathway in glioma cell proliferation and migration. |
RNA interference; human phospho-kinase array; immunoblotting; xenograft models; wound healing and transwell assays |
Neurochemical research |
Low |
39636549
|
| 2024 |
In Huntington's disease medium spiny neurons (MSNs), LMNB1 is greatly reduced and mislocalizes to the cytoplasm and axons. Treatment with KPT335 (nuclear export inhibitor) or HTT knockdown attenuates LMNB1 mislocalization and alleviates neuronal death, linking LMNB1 mislocalization to nucleocytoplasmic transport defects. |
hPSC-derived MSN differentiation; immunofluorescence for LMNB1 localization; KPT335 treatment; HTT knockdown; cell viability assays |
Inflammation and regeneration |
Medium |
38360694
|
| 2025 |
Transcription factor ZFP335 directly binds to the promoter of the Lmnb1 gene and regulates its transcription, as demonstrated by ChIP assay. Overexpression of Lmnb1 significantly rescues the impaired homeostatic proliferation of Zfp335-knockout T cells, establishing Lmnb1 as a direct downstream transcriptional target of Zfp335 required for naïve T cell homeostatic proliferation. |
ChIP assay; adoptive transfer model; Zfp335 conditional knockout; Lmnb1 overexpression rescue; RNA-seq; in vitro IL-7 proliferation assay |
Cell & bioscience |
Medium |
41088342
|
| 2025 |
Excess lamin B1 (LB1) elevates nuclear stiffness in neurons and impairs neuronal motility in confined spaces in vitro. In vivo, excess LB1 halts neuronal migration without altering laminar identity or overall gene expression. Cerebral organoids from LMNB1-duplication iPSCs exhibit impaired neuronal migration. Computational modeling and live imaging validate a temporal relationship between nuclear deformation and migration velocity. |
In vivo mouse cortical neuron overexpression; atomic force microscopy/nuclear stiffness measurement; live imaging in confined microchannels; cerebral organoids from patient iPSCs; computational modeling; electrophysiology |
bioRxivpreprint |
Medium |
|
| 2025 |
Conditional hypomorphic expression of Lamin B1 in B cells leads to elevated DNA damage, altered chromatin accessibility, and disrupted transcriptional profiles. Using sBLISS, non-random double-strand break hotspots are identified near transcriptional start sites and regulatory elements controlling translation and mRNA fate in GC B cells depleted of Lamin B1, indicating that LMNB1 protects fragile regulatory genomic regions. |
In vivo and in vitro B cell conditional hypomorphic Lamin B1 models; sBLISS (in situ labelling and sequencing of double-strand breaks); chromatin accessibility assays; transcriptomic profiling |
bioRxivpreprint |
Medium |
|