| 2017 |
CMTM4 associates with the PD-L1 protein at the cell surface, reduces PD-L1 ubiquitination, and increases PD-L1 protein half-life without affecting PD-L1 transcription. CMTM4 shares this function with CMTM6 (demonstrated by genetic complementation in CMTM6-deficient cells), and interference with CMTM4 expression impairs PD-L1 protein expression. |
Haploid genetic screen, genetic complementation, co-immunoprecipitation, ubiquitination assay, protein half-life (cycloheximide chase), flow cytometry, siRNA knockdown |
Nature |
High |
28813410
|
| 2022 |
CMTM4 is a constitutive subunit of the IL-17 receptor: it associates with IL-17 receptor subunit C (IL-17RC), mediates IL-17RC stability, glycosylation, and plasma membrane localization. CMTM4-deficient mouse and human cell lines are largely unresponsive to IL-17A due to inability to assemble the IL-17R signaling complex. CMTM4-deficient mice show severe defects in immune cell recruitment following IL-17A administration and resistance to experimental psoriasis. |
Co-immunoprecipitation, CRISPR/Cas9 knockout cell lines, in vivo mouse models (experimental psoriasis, EAE), IL-17A stimulation assays, glycosylation analysis |
Nature immunology |
High |
36271145
|
| 2018 |
CMTM4 colocalizes with Rab4+ and Rab7+ endocytic vesicles and with membrane-bound and internalized VE-cadherin. CMTM4 overexpression enhances VE-cadherin internalization and promotes rapid recycling (EEA1+, Rab4+, Rab11+, Rab7+ vesicles), while CMTM4 knockdown decreases VE-cadherin internalization. CMTM4 promotes endothelial barrier function and vascular sprouting. |
siRNA knockdown, adenovirus-mediated overexpression, intracellular colocalization staining, 3D vascular sprouting assay, zebrafish morpholino injection, transendothelial electrical resistance (TEER) assay |
Angiogenesis |
High |
30097810
|
| 2010 |
CMTM4-v1 and CMTM4-v2 are distributed on the cell membrane and across the cytoplasm. Overexpression of either isoform inhibits HeLa cell growth by inducing G2/M phase accumulation without inducing apoptosis. |
Overexpression in HeLa cells, flow cytometry (cell cycle analysis), subcellular localization (immunofluorescence) |
Molecules and cells |
Medium |
20213316
|
| 2015 |
Restoration of CMTM4 in 786-O ccRCC cells suppresses cell growth by inducing G2/M cell cycle arrest and upregulation of p21, and inhibits cell migration. Knockdown of CMTM4 produces the opposite effects. CMTM4 overexpression inhibits tumor xenograft growth in nude mice. |
Overexpression and siRNA knockdown, CCK-8/cell counting, wound healing/transwell assay, flow cytometry, Western blot (p21), xenograft model |
Journal of experimental & clinical cancer research |
Medium |
26474560
|
| 2019 |
CMTM4 suppresses PI3K/Akt signaling in pancreatic cancer cells via downregulation of PAK4. miR-5703 (from pancreatic stellate cell-derived exosomes) directly binds the 3'UTR of CMTM4 mRNA to downregulate its expression, promoting PC cell proliferation. |
Luciferase 3'UTR reporter assay, siRNA knockdown, CMTM4 overexpression, Western blot (PAK4, p-AKT), in vivo xenograft model |
Cancer letters |
Medium |
32585413
|
| 2019 |
CMTM4 overexpression in colorectal cancer SW480 cells decreases phosphorylation levels of AKT, ERK1/2, and STAT3, while CMTM4 knockdown in HT29 cells elevates these. Pathway inhibitor experiments validate that these three signaling pathways contribute to CMTM4's anti-proliferative and anti-migratory effects. |
Overexpression and siRNA knockdown, Western blot (p-AKT, p-ERK1/2, p-STAT3), pharmacological inhibitors, proliferation and migration assays |
Acta biochimica et biophysica Sinica |
Medium |
31435638
|
| 2019 |
CMTM4 knockout mice generated by CRISPR-Cas9 show reduced testicular daily sperm production, lower epididymal sperm motility, abnormal sperm morphology, sub-fertile phenotype, and reduced acrosome reactions. Quantitative proteomics identified 139 downregulated proteins in KO testes enriched for sperm motility and acrosome reaction functions. |
CRISPR-Cas9 knockout mice, Western blot, immunohistochemistry, sperm motility/morphology analysis, in vitro fertilization assay, acrosome reaction assay, quantitative mass spectrometry proteomics |
Molecular & cellular proteomics |
High |
30867229
|
| 2021 |
CMTM4 is the major regulator of PD-L1 in liver cancer (HCC and ICC) context. CMTM4 stabilizes PD-L1 through post-translational mechanisms. In vivo, Cmtm4 suppression in immunocompetent mice inhibited HCC growth and increased CD8+ T-cell infiltration. CMTM4 depletion sensitized HCC tumors to anti-PD-L1 treatment. |
siRNA knockdown in multiple HCC/ICC cell lines, Western blot, in vivo syngeneic mouse model, flow cytometry (CD8+ T cells), anti-PD-L1 combination therapy |
Hepatology communications |
Medium |
34558800
|
| 2022 |
CMTM4 interacts with CXCR4, alters its glycosylation pattern, and slows CXCR4 trafficking from the endoplasmic reticulum to the plasma membrane without affecting overall cell surface expression or CXCR4 internalization/degradation in the absence of ligand. Altered CXCR4 trafficking reduces ligand-induced CXCR4 degradation and affects AKT but not ERK1/2 activation downstream of CXCR4. |
Co-immunoprecipitation, synchronized ER-release trafficking assay, glycosylation analysis, CXCR4 internalization/degradation assay, Western blot (AKT, ERK1/2), zebrafish cmtm4 morpholino |
Molecular biology of the cell |
Medium |
36044337
|
| 2024 |
CMTM4 directly binds IL-17RC in lymphatic endothelial cells (LECs). CMTM4 knockdown abrogates IL-17A plus TNF-α-induced NF-κB signaling and CXC chemokine (CXCL1/2/3/5) secretion. LEC-specific CMTM4 overexpression in Prox1-CreERT2 mice promotes neutrophil drainage and alleviates immune pathological responses. |
Co-immunoprecipitation (CMTM4–IL-17RC binding), siRNA knockdown, NF-κB signaling assay, cytokine/chemokine ELISA, adeno-associated virus LEC-specific overexpression in mice, in vivo inflammation/infection models |
Mucosal immunology |
Medium |
38754839
|
| 2025 |
CMTM4 promotes EGFR recycling and prevents Rab-dependent EGFR degradation, thereby sustaining EGF signaling post-translationally. CMTM4 knockout reduces NF-κB, mTOR, and PI3K/Akt pathway activation in lung carcinoma and decreases EGF-stimulated production of inflammatory cytokines (G-CSF), leading to reduced PMN-MDSC recruitment. CMTM4 KO sensitizes tumor cells to EGFR inhibitors. |
CMTM4 knockout, Western blot (NF-κB, mTOR, PI3K/Akt, EGFR), EGFR recycling/degradation assay (Rab-dependent), cytokine profiling, MDSC flow cytometry, EGFR inhibitor sensitivity assay, in vivo syngeneic tumor models, siRNA-liposome in vivo delivery |
The EMBO journal |
Medium |
39948411
|
| 2025 |
CMTM4 interacts with and stabilizes PHB2 (prohibitin 2) through post-translational modification. This CMTM4–PHB2 interaction activates the STING/TBK1/STAT6 pathway, promoting nuclear translocation of STAT6 which binds CCL2 and IL-6 promoters to upregulate their transcription, thereby driving MDSC recruitment (via CCL2/CCR2 and IL-6/GP130 axes) and immune suppression in cervical cancer. |
Co-immunoprecipitation (CMTM4–PHB2), chromatin immunoprecipitation (ChIP-qPCR for STAT6 at CCL2/IL-6 promoters), nuclear fractionation, Western blot (STING/TBK1/STAT6), siRNA knockdown, in vivo therapeutic models with anti-PD-1 |
Journal for immunotherapy of cancer |
Medium |
40514067
|
| 2025 |
In sepsis, CMTM4 promotes PD-L1-mediated macrophage apoptosis by enhancing STAT2 phosphorylation rather than by directly binding PD-L1. CMTM4 inhibition reduces macrophage apoptosis. |
Co-immunoprecipitation (protein-protein interactions), ChIP-qPCR, Western blot (p-STAT2), flow cytometry (apoptosis), transcriptomic sequencing, in vitro macrophage model (THP-1 and C57BL/6 mice) |
Experimental cell research |
Medium |
40122504
|
| 2025 |
Cmtm4 deletion in mice downregulates IL-17RC expression and suppresses downstream NF-κB activation and NOX1 levels in the context of H. pylori-induced gastric carcinogenesis, inhibiting GC development and precancerous lesion formation. |
Cmtm4 knockout mice, H. pylori infection model, Western blot (IL-17RC, NF-κB, NOX1), immunohistochemistry, DNA damage analysis |
Pathology international |
Medium |
40432275
|
| 2024 |
Cmtm4 deficiency in mice exacerbates DSS-induced colitis and causes gut microbiome dysbiosis. CMTM4 deficiency suppresses S100a8/9 expression in vitro via the IL-17 pathway, whereas elevated S100a8/9 in vivo is attributable to microbial dysbiosis. Blocking S100a8/9 receptor RAGE reverses phenotypes associated with CMTM4 deficiency. |
Cmtm4 knockout mice, DSS colitis model, cohousing experiment (microbiome transfer), in vitro IL-17 stimulation, RAGE inhibitor, Western blot, 16S microbiome analysis |
Journal of genetics and genomics |
Medium |
38575111
|
| 2025 |
Exosomal CMTM4 from ovarian cancer cells is internalized by macrophages, activates the NF-κB pathway in tumor-associated macrophages (TAMs), promotes M2 polarization, and enhances secretion of TGF-β1 and CXCL12 while upregulating ICAM1 expression to facilitate cancer metastasis. Eltrombopag was identified as a CMTM4 inhibitor in vivo. |
Exosome isolation/internalization assay, macrophage polarization assay, NF-κB pathway Western blot, cytokine ELISA (TGF-β1, CXCL12), ICAM1 expression analysis, CMTM4 knockdown, in vivo OC models, drug screening |
Advanced science |
Medium |
40433989
|
| 2015 |
miR-205 inhibits apoptosis in renal HK-2 cells by directly binding to the 3'UTR of CMTM4 mRNA and inhibiting its expression; CMTM4 is identified as a pro-apoptotic target gene whose suppression mediates the anti-apoptotic effect of miR-205. |
Luciferase 3'UTR reporter assay, Western blot, RT-PCR, flow cytometry (apoptosis), miR-205 mimic/inhibitor overexpression |
Iranian journal of basic medical sciences |
Low |
26730338
|
| 2024 |
CMTM4 overexpression in gastric cancer AGS cells upregulates STAT1 and enriches STAT1 signaling pathway activity (identified by TMT proteomics and confirmed by Western blot), associated with inhibition of proliferation, induction of apoptosis, and G1/S arrest. |
Overexpression in AGS cells, TMT quantitative proteomics, Western blot (STAT1), flow cytometry (apoptosis, cell cycle), CCK-8/clonogenic assay |
Journal of gastrointestinal oncology |
Low |
39279978
|