| 2007 |
CRLF1 forms a heterodimer complex with cardiotrophin-like cytokine factor 1 (CLCF1/CLC), and this heterodimer competes with ciliary neurotrophic factor (CNTF) for binding to the CNTF receptor (CNTFR) complex, placing CRLF1 in the CNTFR signaling pathway. |
Biochemical characterization; mutation analysis; mRNA expression in patient fibroblasts by real-time quantitative PCR |
American journal of human genetics |
High |
17436251 17436252
|
| 2002 |
Loss-of-function mutations in CRLF1 cause cold-induced sweating syndrome (CISS1), an autosomal recessive disorder, indicating that CRLF1 is required for normal developmental and autonomic nervous system function. |
Genome-wide linkage mapping, candidate region fine-mapping, DNA sequencing in affected families |
American journal of human genetics |
High |
12509788
|
| 2011 |
Phenotypic severity of CRLF1-associated disorders (Crisponi syndrome vs. CISS1) mainly depends on altered kinetics of secretion of the mutated CRLF1 protein; mutations that more severely impair CRLF1 secretion correlate with more severe clinical outcome. |
Functional secretion assays of mutant CRLF1 proteins from patient-derived or transfected cells; clinical analysis of 19 patients |
European journal of human genetics : EJHG |
Medium |
21326283
|
| 2013 |
CRLF1 protects differentiated neuroblastoma cells against 6-hydroxydopamine-induced oxidative stress by a cell-autonomous mechanism that is independent of its known role as a co-ligand for the CNTF receptor (gp130/JAK signaling pathway). |
Loss-of-function (siRNA knockdown) and gain-of-function (overexpression) in neuroblastoma cells; 6-OHDA toxicity assay; differentiation state comparison |
PloS one |
Medium |
23818941
|
| 2017 |
CLF-1 (CRLF1) contains a binding site for the endocytic receptor sorLA; sorLA-expressing cells rapidly internalize CLF-1 and CLC:CLF-1, and in cells co-expressing CNTFRα and sorLA, CLF-1 bridges CNTFRα to sorLA, driving CNTFRα internalization and lysosomal degradation, thereby downregulating surface CNTFRα and reducing CLC:CLF-1 signaling. |
Western blotting, lysosomal enzyme inhibition, immunocytochemistry in cells co-expressing sorLA, CNTFRα, and CLF-1 |
Journal of visualized experiments : JoVE |
Medium |
28117780
|
| 2018 |
CRLF1 promotes proliferation, migration, invasion, and epithelial-mesenchymal transition in papillary thyroid carcinoma cells by activating the ERK1/2 and AKT signaling pathways; these oncogenic effects are suppressed by MEK inhibitor U0126 or AKT inhibitor MK-2206. |
Loss-of-function and gain-of-function assays in PTC cell lines; in vitro migration/invasion; in vivo tumor growth; Western blotting of ERK1/2 and AKT phosphorylation; pharmacological inhibition |
Cell death & disease |
Medium |
29515111
|
| 2020 |
CRLF1 directly binds MYH9, which enhances CRLF1 protein stability; this interaction promotes PTC cell proliferation and metastasis via ERK pathway activation and upregulation of transcription factor ETV4, which in turn binds the MMP1 promoter to induce MMP1 expression. |
Co-immunoprecipitation (direct binding), RNA-sequencing (ETV4 as downstream target), ChIP assay (ETV4 binding MMP1 promoter), in vitro and in vivo functional assays, Western blotting |
Frontiers in endocrinology |
Medium |
32982961
|
| 2020 |
TGF-β1 upregulates CRLF1 mRNA expression in ligamentum flavum cells via the SMAD3 pathway; CRLF1 in turn enhances fibrosis via ERK signaling at the post-transcriptional level, and CRLF1 knockdown reduces fibrosis caused by inflammatory cytokines and mechanical stress. In vivo, CRLF1 overexpression causes ligamentum flavum hypertrophy. |
Transcriptome and proteomics of human LF tissue; immunohistochemistry; SMAD3 pathway inhibitor studies; CRLF1 knockdown and overexpression in vivo (bipedal-standing mouse model) and in vitro |
Frontiers in cell and developmental biology |
Medium |
33072735
|
| 2021 |
miR-3065-3p directly targets and suppresses CRLF1 mRNA (validated by luciferase reporter assay), and CRLF1 acts downstream of miR-3065-3p to inhibit stemness in colorectal cancer; CRLF1 knockdown promotes, and its overexpression restores, the pro-stemness effects regulated by this miRNA. |
Luciferase reporter assay for direct miR-3065-3p/CRLF1 interaction; gain/loss-of-function in colorectal cancer cell lines and orthotopic xenograft; stemness markers (NANOG, OCT4, SOX2, ALDH activity, sphere formation) |
Journal of translational medicine |
Medium |
34656128
|
| 2021 |
CRLF1 is a direct target of miR-320 in bone marrow-derived mesenchymal stem cells (BMSCs); suppression of CRLF1 promotes chondrogenic differentiation of BMSCs and protects cartilage from OA damage; miR-320 overexpression reverses CRLF1-driven inhibition of chondrogenesis and promotion of apoptosis. |
Luciferase reporter assay; miR-320 overexpression; CRLF1 knockdown; chondrogenic differentiation assays in BMSCs; DMM mouse OA model |
Molecular medicine (Cambridge, Mass.) |
Medium |
34551709
|
| 2023 |
Cardiac fibrosis induced by TGF-β1 upregulates CRLF1 expression through the SMAD-dependent (not SMAD-independent) signaling pathway; CRLF1 then promotes cardiac fibroblast viability, collagen production, proliferation, and myofibroblast transformation by activating the ERK1/2 signaling pathway. |
Gain- and loss-of-function in neonatal mouse cardiac fibroblasts; ERK1/2 inhibitor; SMAD-dependent and SMAD-independent TGF-β1 pathway inhibitors; Western blotting |
Journal of Zhejiang University. Science. B |
Medium |
37551555
|
| 2024 |
CRLF1 is a novel component of the mTORC2 complex; it enhances AKT Ser473 phosphorylation by strengthening the interaction between AKT and SIN1, thereby inhibiting the ASK1-JNK-caspase-3-gasdermin E pyroptotic pathway and conferring chemoresistance in ovarian cancer. Binding-defective CRLF1 variants impair AKT-SIN1 interaction and promote pyroptosis. |
Co-immunoprecipitation (AKT-SIN1 interaction), mTORC2 complex biochemistry, AKT Ser473 phosphorylation assays, gain/loss-of-function with binding-defective mutants, pyroptosis assays, in vitro chemosensitivity assays |
Cell death & disease |
Medium |
39256356
|
| 2024 |
A homodimeric CRLF1 complex stimulates chondrogenic differentiation of BMSCs via Smad2/3 signaling, while a heterodimeric CRLF1/CLC (CLCF1) complex stimulates catabolic events in chondrocytes via STAT3 activation, demonstrating that the oligomeric state of CRLF1 determines its downstream signaling outcome. |
CRLF1 overexpression in BMSCs (homodimer secretion confirmed), chondrogenic differentiation assays (alcian blue staining, gene expression), immunoblot for Smad2/3 and STAT3 signaling, interleukin-1β-treated chondrocyte cell line, in vivo rabbit femoral osteochondral defect model |
Cells |
Medium |
38727293
|
| 2025 |
The CRLF1/CLCF1 heterodimer activates JAK/STAT3 signaling in nucleus pulposus cells, enhancing production of senescence-associated secretory phenotype (SASP) factors and accelerating cell senescence; CRLF1 knockdown reduces extracellular matrix degradation and alleviates intervertebral disc degeneration in vivo. |
Fluorescence colocalization and co-immunoprecipitation (CRLF1-CLCF1 heterodimer); RNA-seq; in vitro NPC senescence assays; in vivo IVDD mouse model; pain-behavior tests |
Osteoarthritis and cartilage |
Medium |
39986601
|
| 2017 |
CRLF1 mutations causing familial achalasia result in severely impaired CRLF1 protein secretion from transfected cells, consistent with the secretion-defect mechanism identified in CS/CISS1, and extending the phenotypic spectrum of CRLF1-related disorders to isolated achalasia. |
Next-generation sequencing; co-immunoprecipitation/secretion assay in transfected cells for the novel c.178T>A (p.Cys60Ser) variant |
Clinical genetics |
Low |
27976805
|
| 2023 |
The lncRNA MIR22HG suppresses chondrogenic differentiation of human adipose-derived stem cells by binding to CTCF, which then binds the CRLF1 promoter to upregulate CRLF1 expression; inhibition of CRLF1 reverses the anti-chondrogenic effect of MIR22HG. |
RNA pulldown / RIP for MIR22HG-CTCF interaction; ChIP for CTCF binding to CRLF1 promoter; gain/loss-of-function; chondrogenic differentiation markers |
Functional & integrative genomics |
Low |
37910254
|
| 2024 |
ENO1 and CRLF1 physically interact (co-immunoprecipitation and co-immunofluorescence), and ENO1 silencing protects against IL-1β-induced chondrocyte inflammation, apoptosis, and matrix degradation; CRLF1 overexpression reverses ENO1 knockdown effects, placing ENO1 upstream of CRLF1 in OA chondrocyte pathology. |
Co-immunoprecipitation; immunofluorescence; siRNA knockdown and overexpression in IL-1β-stimulated C-28/I2 chondrocytes; NF-κB pathway assays |
Tissue & cell |
Low |
39116531
|
| 2026 |
CRLF1, predominantly secreted by activated cardiac fibroblasts, acts as a paracrine factor driving cardiomyocyte hypertrophy by activating the LIFR-JAK1/2-STAT3 signaling cascade; genetic ablation of Crlf1 in fibroblasts or pharmacological inhibition of downstream STAT3 signaling markedly attenuates hypertrophic cardiomyopathy phenotypes in mouse and human HCM models. |
Single-cell RNA sequencing (cellular source identification); bulk RNA-seq and WGCNA; gain- and loss-of-function studies; Myh6 R404Q/+ mouse model; in vitro human cardiomyocyte assays; pharmacological pathway inhibition |
Circulation |
High |
41838796
|
| 2024 |
CRLF1 promotes prostate cancer cell growth and invasion via upregulation of COMP (cartilage oligomeric matrix protein), which activates the FAK/PI3K/AKT signaling cascade; COMP knockdown abrogates the cancer-promoting effects of CRLF1 overexpression. |
Bioinformatics (protein interaction networks, TCGA); qRT-PCR and Western blot; Transwell invasion, CCK-8, wound healing assays; in vivo xenograft; genetic perturbation (OE and KD) of CRLF1 and COMP |
Cancers |
Low |
42122189
|
| 2026 |
ZBTB7A transcriptionally activates CRLF1 expression in ovarian cancer cells; CRLF1 knockdown abrogates ZBTB7A-induced cell proliferation and migration, defining a functional ZBTB7A/CRLF1 oncogenic axis. |
Transcriptomic analyses; RNA interference and overexpression functional assays; proliferation, clonogenic, migration assays |
Oncology reports |
Low |
41891980
|