| 1997 |
Human SQLE was mapped to chromosome 8q24.1 by PCR on somatic cell hybrid panels and FISH, and was shown to be transcriptionally regulated by sterols and cholesterol synthesis inhibitors. |
PCR on somatic cell hybrid panel, radiation hybrid panel, fluorescence in situ hybridization (FISH), transcriptional regulation assays |
Genomics |
Medium |
9286711
|
| 2017 |
The human SQLE promoter contains two sterol-regulatory elements (SREs) and two NF-Y binding sites that mediate SREBP-2-dependent transcriptional activation of SQLE in response to sterol deprivation. |
Luciferase reporter assays with SRE/NF-Y site mutants, electrophoretic mobility shift assay (EMSA), ChIP-PCR |
Biochimica et biophysica acta. Molecular and cell biology of lipids |
High |
28342963
|
| 2018 |
MARCH6 (an E3 ubiquitin ligase) promotes cholesterol-stimulated ubiquitylation and proteasomal degradation of SQLE, and UBE2J2 (not UBE2G2) is the primary E2 ubiquitin-conjugating enzyme required for this MARCH6-dependent SQLE degradation in mammalian cells, including hepatic cells. |
CRISPR/Cas9 screen of ERAD-associated E2 enzymes, protein stability assays, enzymatic activity-dependent rescue experiments in multiple human cell lines |
Atherosclerosis |
High |
30658189
|
| 2019 |
Sensitivity to SQLE inhibition in a subset of neuroendocrine tumors (particularly small cell lung cancer) results from toxic accumulation of the SQLE substrate squalene, not from downstream cholesterol biosynthesis inhibition. |
Chemical biology screen, orthogonal metabolic and cell viability assays, squalene accumulation measurements |
Nature communications |
High |
30626880
|
| 2019 |
OSBPL2 deletion upregulates SQLE expression via suppression of the AMPK signaling pathway, which leads to increased SP1 and SREBF2 nuclear entry and binding to functional sites in the SQLE promoter, resulting in elevated intracellular cholesterol and cholesteryl ester. |
CRISPR/Cas9 OSBPL2 knockout HeLa cells, RNA-seq, dual-luciferase reporter assay, AMPK pathway inhibitor experiments |
Experimental cell research |
Medium |
31356817
|
| 2020 |
MARCH6 promotes degradation of SQLE in endothelial cells to regulate cholesterol load; loss of MARCH6 increases SQLE protein and cholesterol, altering membrane order, disorganizing VE-cadherin-based adherens junctions, and impairing angiogenic sprouting. |
siRNA/shRNA knockdown of MARCHF6 and SQLE, cholesterol measurements, membrane order assays, barrier function assays, endothelial sprouting assays |
Cell reports |
High |
32755570
|
| 2021 |
p53 directly represses SQLE transcription in a SREBP2-independent manner under normal sterol conditions, thereby reducing cholesterol production and suppressing tumor growth; SQLE inhibition reverses the increased cell proliferation caused by p53 deficiency. |
Transcriptional reporter assays, siRNA/shRNA knockdown, terbinafine inhibitor studies, in vivo mouse NAFLD tumorigenesis model with p53 KO |
EMBO reports |
High |
34459531
|
| 2021 |
MYC directly transcriptionally upregulates SQLE, thereby increasing cholesterol biosynthesis and promoting tumor cell proliferation; SQLE overexpression restores cholesterol levels in MYC-knockdown cells, and enforced MYC expression has no effect on cholesterol in SQLE-depleted cells. |
MYC knockdown/overexpression, SQLE overexpression rescue, cholesterol measurements, epistasis experiments |
Frontiers in cell and developmental biology |
Medium |
33791309
|
| 2021 |
miR-205 directly targets SQLE mRNA to repress its expression and inhibit de novo cholesterol biosynthesis in prostate cancer; inhibition of SQLE blocks AR pathway transactivation and suppresses tumor growth in vivo. |
miR-205 restoration, SQLE competitive inhibition with terbinafine, cholesterol biosynthesis assays, in vivo orthotopic tumor model, patient PSA measurement |
Nature communications |
High |
34417456
|
| 2022 |
Polyphyllin I (PPI) directly binds SQLE protein (not HMGCR), disrupting the SREBP-2/HMGCR/SQLE/lanosterol synthase cholesterol biosynthesis pathway and inducing hepatotoxicity. |
Pull-down assay, surface plasmon resonance (SPR), molecular docking, siRNA knockdown and overexpression of HMGCR and SQLE, proteomics/transcriptomics |
Journal of pharmaceutical analysis |
High |
36820075
|
| 2023 |
SQLE inhibition in pancreatic cancer cells leads to squalene accumulation that inhibits CXCL1 transcription via the NF-κB/p65 pathway, reducing recruitment of MDSCs and TAMs and increasing CD8+ T cell infiltration in the tumor microenvironment. |
SQLE knockdown in immune-competent mouse model, squalene administration in vivo, flow cytometry of immune cells, RNA-sequencing, RT-PCR/Western blot for NF-κB pathway |
Frontiers in immunology |
Medium |
39763673
|
| 2023 |
SQLE promotes pancreatic cancer growth through two mechanisms: (1) its inhibition causes squalene accumulation-induced ER stress and apoptosis; (2) SQLE-mediated cholesterol biosynthesis maintains lipid raft stability, activating the Src/PI3K/Akt signaling pathway. |
siRNA knockdown, SQLE inhibitors, ER stress markers, lipid raft fractionation, Src/PI3K/Akt pathway analysis, xenograft tumor models |
Cell death & disease |
Medium |
37542052
|
| 2023 |
p53 suppresses SQLE expression via induction of miR-205, which directly targets SQLE mRNA; c-MYC induces SQLE expression directly and via its transcriptional target AP4/TFAP4, which directly binds the SQLE promoter; loss of AP4 causes resistance to terbinafine. |
miR-205 target validation, AP4/TFAP4 transcriptional reporter assays, AP4 knockdown/overexpression, cholesterol measurements, terbinafine sensitivity assays |
International journal of biological sciences |
Medium |
37705742
|
| 2024 |
Doa10/MARCH6 adopts a unique circular transmembrane structure with a lipid-binding scaffold and gated helical bundle; the RING domain is positioned over the membrane channel, and SQLE degradation requires interconnected channel, RING domain, and lipid-binding elements, revealing how metabolic signals, substrate binding, and E3 ligase activity are coupled. |
Cryo-EM structural analysis, AlphaFold predictions, structure-based mutagenesis campaign (95 MARCH6 variants), SQLE stability assays |
Nature communications |
High |
38195637
|
| 2024 |
KDM4A histone demethylase demethylates H3K9me3 at the SQLE gene locus, opening chromatin to allow GABPA transcription factor binding and SQLE transcriptional activation; KDM4A inhibition downregulates SQLE, blocks cholesterol synthesis, causes squalene accumulation, suppresses JNK/c-Jun phosphorylation via ROS, and induces apoptosis in bladder cancer. |
KDM4A inhibitor (ML324) drug screening in tumor organoids, ChIP assays for H3K9me3 and GABPA, SQLE knockdown, ROS measurements, JNK/c-Jun pathway analysis, PDX models |
Redox biology |
Medium |
39461328
|
| 2024 |
SQLE localizes to mitochondria and directly interacts with LONP1 (Lon peptidase 1) to stabilize mitochondrial transcription factor A (TFAM) by preventing its proteolysis, leading to elevated oxidative phosphorylation (OXPHOS) and mitochondrial ROS production in bladder cancer cells. |
Subcellular fractionation/localization studies, co-immunoprecipitation of SQLE-LONP1 interaction, TFAM stability assays, OXPHOS and mitochondrial ROS measurements, Sqle transgenic and knockout mouse models, Mito-TEMPO rescue experiments |
Oncogene |
High |
41254141
|
| 2024 |
SQLE-mediated removal of squalene promotes mitochondrial biogenesis via a non-cholesterol mechanism: squalene accumulation binds Sp1 protein and forms a tight Sp1-TFAP2E promoter complex, suppressing TFAP2E and downstream PGC-1α expression, thereby inhibiting mitochondrial metabolism and tumor formation. |
SQLE silencing, squalene direct administration in vivo, Sp1-DNA binding analysis (binding score calculation), TFAP2E/PGC-1α expression assays, xenograft tumor model, pharmacological squalene administration |
Cancer letters |
Medium |
40015662
|
| 2025 |
H. pylori CagA upregulates SQLE expression, and elevated SQLE activity increases cellular palmitoyl-CoA levels, which enhances PD-L1 palmitoylation while decreasing its ubiquitination, thereby stabilizing PD-L1 and suppressing T cell activity to facilitate immune evasion. |
CagA overexpression, SQLE manipulation, palmitoyl-CoA measurement, PD-L1 palmitoylation and ubiquitination assays, T cell activity assays |
Cell death & disease |
Medium |
39809787
|
| 2025 |
HDAC2-dependent delactylation of PD-L1 at K189 promotes vimentin-mediated nuclear translocation of PD-L1, which then upregulates SQLE transcription via the transcription factor YY1, thereby accelerating cholesterol production and liver cancer growth. |
PD-L1 lactylation site mapping, p300 acetyltransferase activity assays, HDAC2 deacylation assays, nuclear fractionation, YY1 ChIP/reporter assays for SQLE promoter, in vitro and in vivo tumor growth assays |
Cancer letters |
Medium |
40614853
|
| 2025 |
NSUN2 increases m5C modification of SQLE mRNA, stabilizing it and increasing SQLE expression in endothelial cells; elevated SQLE increases intracellular cholesterol, which promotes endothelial cell activation via the PI3K-AKT signaling pathway in diabetic retinopathy. |
NSUN2 knockdown/overexpression, m5C modification assays, SQLE mRNA stability measurements, cholesterol quantification, PI3K-AKT pathway analysis, tube formation and endothelial activation assays |
FASEB journal |
Medium |
40536094
|
| 2025 |
NAT10 acts as an upstream activator of SQLE-dependent cholesterol biosynthesis through two mechanisms: (1) activation of AKT/mTOR signaling leading to SQLE upregulation, and (2) ac4C modification of SQLE mRNA to enhance its stability. |
Multi-omics dataset analysis, AKT/mTOR pathway manipulation, ac4C mRNA modification assays, SQLE mRNA stability measurements, in vitro and in vivo cholesterol and tumor growth assays |
iScience |
Medium |
41550764
|
| 2025 |
SP1 directly binds to the SQLE promoter and activates its transcription, as demonstrated in the context of SERPINH1/SENP3 signaling in hepatocellular carcinoma. |
ChIP-qPCR assay demonstrating SP1 binding to SQLE promoter, SP1 inhibitor (plicamycin) rescue experiments |
International immunopharmacology |
Medium |
39946769
|
| 2025 |
SQLE-produced intermediate metabolite 2,3-oxidosqualene interacts with vinculin to enhance nuclear accumulation of YAP1, increasing YAP/TEAD-dependent gene expression and accelerating tumor growth and metastasis in esophageal squamous cell carcinoma. |
Whole genome sequencing of ESCC cohorts, metabolite-protein interaction studies (2,3-oxidosqualene/vinculin), YAP nuclear localization assays, in vivo 4-NQO mouse ESCC model with SQLE overexpression |
Cancer letters |
Medium |
39924077
|
| 2025 |
SQLE inhibition in hepatocellular carcinoma tumor cells suppresses oxysterol (27-hydroxycholesterol) secretion, overcoming cholesterol restrictions on CD8+ T cells via oxysterol-SREBP2 signaling and enhancing antitumor immunity; terbinafine synergizes with anti-PD1 therapy in HCC mouse models. |
Pharmacological SQLE inhibition and genetic knockdown, co-culture experiments of tumor cells and T cells, untargeted metabolomics identifying 27-hydroxycholesterol, transcriptome analysis, murine HCC models with anti-PD1 combination therapy |
Journal for immunotherapy of cancer |
Medium |
41005980
|
| 2025 |
Ginsenoside 20(S)-Rg3 upregulates SQLE expression by downregulating HIF-1α, and SQLE interacts with FDFT1 (farnesyl-diphosphate farnesyltransferase 1) as confirmed by co-immunoprecipitation. |
Co-immunoprecipitation of SQLE-FDFT1 interaction, HIF-1α/SQLE axis manipulation, transcriptomic and lipidomic analysis, SQLE silencing rescue experiments |
iScience |
Low |
40792023
|