| 1996 |
Homozygous deletion mutations in PLEC1 abolish plectin expression at hemidesmosomes, demonstrated by negative immunofluorescence with anti-plectin antibody (HD-1), establishing that plectin is required for binding of the intermediate keratin filament network to hemidesmosomal complexes in basal keratinocytes and for structural integrity of muscle (sarcolemmal localization). |
Immunofluorescence, mutation analysis (homozygous deletion identification), electron microscopy of patient skin |
Human molecular genetics |
High |
8894687
|
| 1996 |
A homozygous nonsense mutation in PLEC1 leads to a premature stop codon, decay of aberrant plectin mRNA, and absence of plectin protein; in skin this causes failure of keratin filaments to connect to the plasma membrane via hemidesmosomes, while in muscle it correlates with aberrant localization of desmin in muscle fibers, establishing plectin as necessary for desmin intermediate filament organization in muscle. |
Mutation identification (nonsense mutation), immunofluorescence of skin and muscle, mRNA analysis |
The Journal of clinical investigation |
High |
8941634
|
| 2010 |
A homozygous mutation in exon 1f of PLEC, specific to the plectin isoform 1f, abolishes sarcolemmal plectin staining and causes ultrastructural abnormalities (membrane duplications, enlarged space between membrane and sarcomere, Z-disk misalignment) in skeletal muscle without skin involvement, establishing that plectin isoform 1f specifically links the sarcolemma to the sarcomere in skeletal muscle. |
Homozygosity mapping, DNA sequencing, transmission electron microscopy, immunofluorescence of patient muscle |
American journal of human genetics |
High |
21109228
|
| 2015 |
A homozygous nonsense mutation in exon 1a of PLEC, specific to plectin isoform 1a (P1a), causes skin-only EBS with hypoplastic hemidesmosomes and intra-epidermal cleavage without cardiomyopathy or muscle dystrophy, establishing that P1a is the dominant plectin isoform in epidermal basal cells and cultured keratinocytes, and that its loss specifically disrupts hemidesmosome structure in skin while sparing other tissues. |
DNA sequencing, immunofluorescence antigen mapping, transmission electron microscopy, western blot, qRT-PCR on patient skin and cultured keratinocytes |
Human molecular genetics |
High |
25712130
|
| 2021 |
Plectin (PLEC) physically interacts with KRT8 (keratin 8) at mitochondria; PLEC anchors mitochondria and KRT8 facilitates mitochondrial fission-mediated mitophagy through this interaction. KRT8 phosphorylation under oxidative stress reduces the PLEC-anchored mitochondria–KRT8 association, modulating mitophagy flux and protecting retinal pigment epithelial cells from necrotic cell death. |
Co-immunoprecipitation (physical interaction between KRT8 and PLEC), live-cell imaging, mitophagy flux assays, mitochondrial morphology analysis |
Autophagy |
Medium |
33783309
|
| 2024 |
PLEC competitively interacts with KEAP1, displacing NRF2 from the KEAP1-NRF2 complex and allowing NRF2 translocation from the cytosol to the nucleus where it activates antioxidant gene expression. ΔNP63α directly transactivates PLEC expression, and radiotherapy-induced ROS activates ΔNP63α via NRF2, forming a ΔNp63α/PLEC/NRF2 feedback loop that promotes radioresistance in esophageal squamous cell carcinoma. |
Transcriptional reporter assays, co-immunoprecipitation (PLEC-KEAP1 interaction), subcellular fractionation (NRF2 nuclear translocation), knockdown/overexpression with functional readouts (ROS levels, radiosensitivity in nude mice) |
Cell death & disease |
Medium |
39500864
|
| 2005 |
PLEC1 mutations (nonsense and splice-site) cause absent or markedly attenuated plectin expression and EBS with pyloric atresia; an exon-trapping experiment demonstrated that a splice-site mutation induces aberrant splicing of PLEC1, establishing this as a mechanism of loss-of-function. |
Immunohistochemistry, DNA sequencing, exon-trapping experiment for splice-site mutation functional validation |
The Journal of molecular diagnostics |
Medium |
15681471
|
| 2007 |
5' trans-splicing (SMaRT) of the PLEC1 transcript in EBS-MD fibroblasts carrying a dominant-negative leucine insertion in exon 9 reduced mutant mRNA levels and restored wild-type plectin expression pattern by immunofluorescence; retroviral delivery increased full-length plectin protein by 58.7%, demonstrating that mRNA-level correction restores plectin protein function. |
Spliceosome-mediated RNA trans-splicing, transient and retroviral transfection of patient fibroblasts, immunofluorescence, protein quantification |
The Journal of investigative dermatology |
Medium |
17989727
|
| 2022 |
Gentamicin treatment suppressed PLEC1 premature termination codons in EBS-MD primary keratinocytes, inducing plectin expression in skin (detected by immunofluorescence) for at least 5 months post-treatment, demonstrating translational readthrough as a mechanism to restore plectin protein from nonsense variants. |
Translational readthrough (gentamicin treatment), immunofluorescence of patient skin before and after treatment |
JAMA dermatology |
Low |
35234827
|
| 2023 |
Plectin knockdown in cochlear hair cells (zebrafish model) resulted in reduction of synaptic mitochondrial potential and loss of ribbon synapses, establishing a role for plectin in maintaining mitochondrial function and synaptic structure at inner ear ribbon synapses relevant to neuronal transmission. |
Plectin knockdown in zebrafish inner ear model, immunofluorescence for ribbon synapses, mitochondrial membrane potential assay |
Hearing research |
Medium |
37393735
|
| 2020 |
CRISPR/Cas9 knockdown of plectin in a mesenchymal stem cell line followed by RNA-sequencing revealed that plectin regulates Wnt signalling, glycosaminoglycan biosynthesis, and immune regulation pathways, placing plectin upstream of these pathways in chondrocyte-relevant cells. |
CRISPR/Cas9 knockdown, RNA-sequencing pathway analysis |
Osteoarthritis and cartilage |
Low |
32580029
|
| 2025 |
In plectin-deficient (Plec-/-) myoblasts and muscle-specific conditional plectin knockout (MCK-Cre/cKO) mice, autophagic flux is impaired: autophagosome turnover is reduced (~40% reduction in LC3B red:green ratio), degradative vacuoles and LC3/SQSTM1-positive patches accumulate, and lysosomal/autophagic compartment signal intensities are reduced. Protein levels of LAMP2, BAG3, and SQSTM1 are elevated in knockout muscle lysates. Chloroquine treatment in vivo confirmed impaired autophagic clearance in plectin-deficient muscle. |
mCherry-EGFP-LC3B autophagy flux reporter, immunofluorescence and electron microscopy, immunoblotting, RNA-seq, CYTO-ID/LYSO-ID dyes, chloroquine treatment in vivo in MCK-Cre/cKO mice |
bioRxivpreprint |
Medium |
|
| 2025 |
Plectin knockout (Plec-/-) fibroblasts are ~2-fold softer than wild-type, show faster viscoelastic stress relaxation, faster actin turnover (3-fold by FRAP), and altered vimentin network architecture (from fine meshwork to bundled network). This establishes plectin as a regulator of cytoskeletal organization and viscoelastic properties by crosslinking actin and vimentin intermediate filaments. |
Single-cell compression measurements, FRAP, confocal imaging of vimentin network in Plec+/+ vs Plec-/- fibroblasts |
bioRxivpreprint |
Medium |
|
| 2025 |
Plectin localizes to focal adhesions (FAs) in mouse astrocytes, where it regulates FA number, maturation, turnover, and mobility of FA components. Plectin polarizes within FAs depending on maturation state and controls recruitment of vimentin to FAs. In plectin-deficient astrocytes, the vimentin network shows impaired connectivity and altered viscoelastic properties. In a reactive astrogliosis model, FA number and size increase alongside elevated plectin expression. |
Live imaging, immunofluorescence, FRAP, plectin-deficient astrocyte model (localization and functional consequence) |
bioRxivpreprint |
Medium |
|
| 2025 |
Plectin cytolinkers bridge keratin 5/14 intermediate filaments and microtubules to mechanically control the 3D perinuclear positioning of melanin pigment organelles in human keratinocytes, and this positioning is required for DNA photoprotection. |
Microrheology, confocal imaging in human disease-related keratinocyte models with plectin disruption, functional readout of DNA photodamage |
bioRxivpreprint |
Low |
|
| 2024 |
Following actin filament disassembly (cytochalasin D treatment), localized increase of vimentin assembly in the mid-cytoplasm is dependent on the cytolinker plectin, establishing plectin as a mediator of cytoskeletal crosstalk between actin and vimentin networks. |
Pharmacological disruption of actin (cytochalasin D), vimentin imaging, plectin-dependent vimentin response assessment |
bioRxivpreprint |
Low |
|
| 2024 |
Genetic or pharmacological inactivation of plectin in autochthonous and orthotopic mouse HCC models suppresses tumor initiation and growth, inhibits invasion and lung metastasis of human HCC cells. Proteomic and phosphoproteomic profiling linked plectin-dependent cytoskeletal disruption to attenuation of FAK, MAPK/Erk, and PI3K/AKT oncogenic signaling, placing plectin upstream of these pathways in hepatocellular carcinoma mechanosensitive signaling. |
Genetic knockout and pharmacological inhibition (plecstatin-1) in mouse HCC models, proteomic and phosphoproteomic profiling, invasion and metastasis assays |
bioRxivpreprint |
Medium |
|
| 2022 |
Immunostaining of liver samples from patients with PLEC-related infantile cholestasis revealed scattered cytoplasmic plectin signals in hepatocytes and reduced colocalization of plectin with cytokeratin 8, establishing that plectin normally co-localizes with cytokeratin 8 intermediate filaments in hepatocytes and that disruption of this colocalization is associated with cholestatic disease. |
Immunofluorescence staining of patient liver biopsy, trio exome sequencing |
Clinical genetics |
Low |
39168815
|