| 2011 |
NDUFA4L2 (COXFA4L2) is a HIF-1α target gene whose hypoxia-induced expression attenuates mitochondrial oxygen consumption by inhibiting Complex I activity, thereby limiting intracellular ROS production under low-oxygen conditions. This was demonstrated using NDUFA4L2-silenced cells and NDUFA4L2 knockout murine embryonic fibroblasts. |
RNAi silencing, NDUFA4L2 knockout MEFs, oxygen consumption assays, Complex I activity assay |
Cell Metabolism |
High |
22100406
|
| 2017 |
NDUFA4L2 overexpression in H9c2 cardiomyocytes subjected to hypoxia/reperfusion prevents apoptosis and mitochondrial dysfunction (increased ATP, delayed mPTP opening, reduced cytochrome c release) via inhibition of Complex I activity; silencing Complex I itself recapitulates the cardioprotective effect. |
Overexpression and knockdown in H9c2 cells, flow cytometry apoptosis, western blot (Bax/Bcl-2), ATP measurement, mPTP opening assay, cytochrome c detection |
Clinical and Experimental Pharmacology & Physiology |
Medium |
28429857
|
| 2018 |
HIF-1α directly binds the hypoxia response element (HRE) of the NDUFA4L2 promoter to transcriptionally activate NDUFA4L2 in cardiac stem cells, and this signaling promotes CSC survival under hypoxia; knockdown of NDUFA4L2 reverses the survival benefit. |
ChIP assay (HIF-1α binding to NDUFA4L2 HRE), HIF-1α agonist/inhibitor (DMOG/2-ME) treatment, NDUFA4L2 siRNA knockdown, cell viability assay |
Biochemical and Biophysical Research Communications |
Medium |
29953852
|
| 2019 |
NDUFA4L2 attenuates apoptosis of nucleus pulposus cells under oxidative stress by suppressing excessive mitophagy; TBHP-induced oxidative stress decreases HIF-1α/NDUFA4L2 signaling to promote mitophagy and apoptosis, whereas NDUFA4L2 upregulation blocks this pathway. |
Primary human NP cell culture, TBHP oxidative stress model, mitophagy inhibitor rescue, NDUFA4L2 overexpression/knockdown, flow cytometry apoptosis, in vivo IVDD model |
Experimental & Molecular Medicine |
Medium |
31740659
|
| 2021 |
Ectopic NDUFA4L2 expression in mouse skeletal muscle reduces mitochondrial respiration and ROS production, lowers AMP, ADP, ATP, and NAD+ levels without altering ETC protein content, causes ~20% reduction in muscle mass, and induces atrogene (MuRF1, Mul1) and apoptotic gene (caspase 3, Bax) expression; femoral artery ligation induces endogenous NDUFA4L2 and its expression correlates with reduced muscle force. |
Adenovirus-mediated ectopic NDUFA4L2 expression in vivo, in vivo electroporation, femoral artery ligation model, mitochondrial respiration assay, metabolite quantification (AMP/ADP/ATP/NAD+), muscle mass and force measurements, gene expression analysis |
FASEB Journal |
High |
34724256
|
| 2021 |
NDUFA4L2 overexpression in HER2-positive breast cancer cells facilitates mitochondrial relocalization of HER2 and suppresses ROS production, thereby promoting trastuzumab resistance; mitochondrial localization of NDUFA4L2 was confirmed by immunofluorescence and subcellular fractionation western blot. |
Immunofluorescence and mitochondrial fractionation western blot (localization), Seahorse metabolic assay, DCFDA ROS measurement, NDUFA4L2 overexpression, trastuzumab resistance assay |
Therapeutic Advances in Medical Oncology |
Medium |
34276814
|
| 2022 |
NFIB transcription factor binds to the promoter region of NDUFA4L2 and promotes its transcription in hepatocellular carcinoma cells; this transcriptional upregulation of NDUFA4L2 inhibits sorafenib-induced ROS accumulation, driving sorafenib resistance. |
Gene expression profiling, promoter binding assay (NFIB binding to NDUFA4L2 promoter), NFIB knockdown, NDUFA4L2 expression measurement, ROS assay, in vitro and in vivo tumor models |
Cancer Science |
Medium |
36369883
|
| 2022 |
In mouse and human brain, NDUFA4L2 is constitutively and specifically expressed in pericytes (highest) and mural cells; its expression is regulated by PHD2/PHD3-dependent HIF stabilization (Vhl conditional knockout dramatically induces expression). NDUFA4L2 inactivation in pericytes increases oxygen consumption and enhances HIF pathway induction under hypoxia, establishing that NDUFA4L2 couples mitochondrial O2 consumption to the cellular hypoxia response in pericytes. |
scRNA-seq analysis, multiplexed fluorescence RNA in situ hybridization, Ng2-cre Vhl conditional knockout mice, in vitro human brain pericyte culture, oxygen consumption assay, HIF pathway reporter readout |
Journal of Cerebral Blood Flow and Metabolism |
High |
35929074
|
| 2022 |
NXPH4 promotes stability of NDUFA4L2 protein in bladder cancer cells; increased NDUFA4L2 levels downstream of NXPH4 activate ROS and glycolysis, contributing to gemcitabine resistance. Rescue experiments show NDUFA4L2 is required for NXPH4-regulated functions. |
Rescue assays (NDUFA4L2 re-expression in NXPH4-knockdown cells), glycolytic activity assay, ROS measurement, in vivo xenograft validation |
Cancers |
Medium |
35954445
|
| 2023 |
NDUFA4L2 expression in ccRCC cells induces a Warburg-like metabolic shift (increased extracellular acidification rate, decreased oxygen consumption rate). Mass-spectrometry-based proteomics of NDUFA4L2-associated complexes identified 3,215 co-immunoprecipitated proteins, with top pathways including 'Metabolic Reprogramming in Cancer' and 'Warburg Effect.' NDUFA4L2 enhances mitochondrial fragmentation and increases mitochondrial-lysosomal associations; 161 lysosomal proteins including NPC1 and NPC2 associate with NDUFA4L2, and NDUFA4L2 regulates lysosomal size and abundance. |
CRISPR-Cas9 NDUFA4L2 knockout (RCC4-KO), MS-based proteomics of immunoprecipitated NDUFA4L2 complexes, Seahorse metabolic assay, high-resolution fluorescence microscopy and live cell imaging |
Cancer Biology & Therapy |
Medium |
36722045
|
| 2024 |
Lenvatinib increases NDUFA4L2 expression in HCC cells, leading to increased IL-33 production and secretion; IL-33 triggers neutrophil extracellular trap (NET) formation via Akt/mTOR-dependent PADI4 upregulation. This NDUFA4L2→IL-33→PADI4/NET axis inhibits cuproptosis in HCC cells and drives lenvatinib resistance. |
NDUFA4L2 expression manipulation in HCC cells, IL-33 knockdown, NETs measurement (CitH3, MPO-DNA, elastase, MPO activity), cuproptosis assay (copper content, FDX1, pyruvate), in vivo HCC mouse models, mTOR inhibitor (rapamycin) and PADI4 inhibitor (GSK484) |
Cellular Oncology |
Medium |
39585643
|
| 2024 |
miR-183-5p directly targets NDUFA4L2 mRNA and negatively regulates its expression; this reduces NDUFA4L2-mediated suppression of mitochondrial Complex I activity, leading to mitoROS accumulation and suppression of lung squamous cell carcinoma cell survival in vitro and in vivo. |
miR-183-5p overexpression, NDUFA4L2 knockdown, mitoROS measurement, Complex I activity assay, apoptosis assay, in vivo xenograft model |
Oncogene |
Medium |
39154121
|
| 2026 |
COXFA4L2 is a paralog of COXFA4 (formerly NDUFA4), a nuclear-encoded cytochrome c oxidase (Complex IV) subunit. In patient-derived fibroblasts from individuals with biallelic COXFA4-null variants (Leigh-like encephalopathy), COXFA4L2 is upregulated and compensates for loss of COXFA4, preserving residual COX activity; this identifies a paralog-mediated compensatory mechanism at Complex IV. |
Patient-derived fibroblast studies (13 individuals, 12 families), COX activity assay, COXFA4L2 protein quantification, COX assembly analysis |
Nature Communications |
High |
42218136
|
| 2026 |
Ndufa4l2 activates the PI3K/AKT signaling pathway in retinal Müller cells under ischemic/hypoxic stress, driving reactive gliosis, hyper-proliferation, and enhanced migration; pharmacological PI3K inhibition (LY294002) reverses these Ndufa4l2-induced effects. |
scRNA-seq (OIR mouse model), CRISPR/Cas9 knockout and overexpression of Ndufa4l2, bioinformatics pathway analysis, PI3K inhibitor (LY294002) rescue experiments, in vitro and in vivo validation |
Pathology, Research and Practice |
Medium |
42235340
|
| 2016 |
NDUFA4L2 is HIF-1-regulated in HCC cells; inactivation of NDUFA4L2 increases mitochondrial activity and oxygen consumption, resulting in ROS accumulation and apoptosis. Knockdown of NDUFA4L2 suppresses HCC growth and metastasis in an orthotopic in vivo model. |
NDUFA4L2 knockdown (siRNA), oxygen consumption measurement, ROS assay, apoptosis assay, orthotopic HCC mouse model, HIF inhibitor (digoxin) treatment |
Clinical Cancer Research |
Medium |
26819450
|
| 2017 |
ELK1 transcription factor positively regulates NDUFA4L2 expression in ccRCC cells; ELK1 knockdown reduces NDUFA4L2 expression, and ELK1 levels positively correlate with NDUFA4L2 in ccRCC clinical tissues. |
ELK1 knockdown in ccRCC cells, NDUFA4L2 expression measurement by western blot/qPCR, correlation analysis in clinical samples |
PeerJ |
Low |
29158991
|
| 2020 |
In hypoxic pulmonary artery smooth muscle cells, NDUFA4L2 (downstream of HIF-1α) promotes ROS-mediated lipid peroxidation (MDA and 4-HNE accumulation) and activates a p38–5-lipoxygenase downstream signaling pathway to drive PASMC proliferation and vascular remodeling; siNDUFA4L2 blocks these effects. |
NDUFA4L2 siRNA knockdown in human PASMCs, MDA/4-HNE measurement, ROS assay, 5-LO/p38 pathway western blot, in vivo hypoxic PAH rat model |
Journal of Cellular and Molecular Medicine |
Medium |
33340241
|
| 2021 |
Ndufa4l2 knockdown in renal proximal tubules of a TRACK mouse model reduces neutral lipid accumulation and decreases expression of ccRCC markers carbonic anhydrase 9 (CA9) and Enolase 1 (ENO1), linking mitochondrial NDUFA4L2 to lipid deposition and ccRCC marker expression. |
Dox-inducible shRNA-mediated knockdown of Ndufa4l2 in transgenic mouse kidney (TRACK model), lipid staining, CA9 and ENO1 protein quantification |
Frontiers in Oncology |
Medium |
34970493
|