| 1998 |
CIDEA activates apoptosis in mammalian cells; its C-terminal region is necessary and sufficient for cell killing, while the N-terminal CIDE domain (homologous to DFF45) is required for DFF45-mediated inhibition of CIDEA-induced apoptosis. CIDEA-induced DNA fragmentation is inhibited by DFF45 but not by caspase inhibitors. |
Transfection of deletion mutants in 293T cells, DNA fragmentation assay, inhibition studies with DFF45 and caspase inhibitors |
The EMBO journal |
High |
9564035
|
| 2003 |
Cidea is expressed at high levels in brown adipose tissue mitochondria and directly suppresses UCP1 activity, thereby regulating thermogenesis and lipolysis; Cidea-null mice have increased metabolic rate, elevated BAT lipolysis, and resistance to diet-induced obesity and diabetes. |
Cidea knockout mouse model, metabolic rate measurements, cold challenge, direct suppression of UCP1 activity assay |
Nature genetics |
High |
12910269
|
| 2005 |
In human adipocytes, CIDEA regulates lipolysis; RNAi-mediated depletion of CIDEA stimulates lipolysis and increases TNF-alpha secretion by a post-transcriptional mechanism. TNF-alpha in turn decreases CIDEA expression via the JNK (c-Jun N-terminal kinase) pathway. |
RNA interference in human adipocytes, lipolysis assay, TNF-alpha secretion measurement, pharmacological inhibition of JNK |
Diabetes |
High |
15919794
|
| 2007 |
Cidea protein is regulated by ubiquitin-proteasome-mediated degradation; it is polyubiquitinated primarily at Lys23 in its N-terminal region, and mutation of N-terminal lysine residues (N-5KA mutant) greatly stabilizes the protein. |
Cycloheximide chase, proteasome inhibitor treatment, ubiquitination assay, site-directed mutagenesis of lysine residues in multiple cell lines and brown adipocytes |
The Biochemical journal |
High |
17711404
|
| 2007 |
Cidea gene expression in mouse liver is transcriptionally regulated by both PPARalpha and PPARgamma through a shared proximal PPRE element (Cidea-PPRE1 at -680/-668) in the Cidea promoter. |
Transactivation/luciferase reporter assays, gel-shift (EMSA), chromatin immunoprecipitation with PPARalpha and PPARgamma ligands |
The Journal of biological chemistry |
High |
17462989
|
| 2008 |
Cidea colocalizes with lipid droplets (not mitochondria) in human and mouse adipocytes, co-localizing with perilipin; ectopic expression of Cidea-GFP greatly enhances lipid droplet size in preadipocytes and COS cells, and Cidea is regulated by PPARgamma. |
Fluorescence microscopy (GFP fusion protein), co-localization with perilipin, RNAi lipolysis assay, rosiglitazone treatment in mice |
Proceedings of the National Academy of Sciences of the United States of America |
High |
18509062
|
| 2008 |
Cidea forms a complex with the beta subunit of AMPK (but not alpha or gamma subunits) in the endoplasmic reticulum, promoting ubiquitination-dependent proteasomal degradation of the AMPK-beta subunit, thereby reducing AMPK protein levels and enzymatic activity in brown adipose tissue. |
Co-immunoprecipitation in vivo, co-localization in ER, co-expression ubiquitination assay, AMPK activity measurement in Cidea-/- adipocytes |
The EMBO journal |
High |
18480843
|
| 2008 |
RIP140 and PGC-1alpha regulate CIDEA expression in brown adipocytes: PGC-1alpha induces while RIP140 represses CIDEA promoter activity via estrogen-related receptor alpha (ERRalpha) and NRF-1 binding sites; RIP140 directly interacts with PGC-1alpha to suppress its coactivator activity. |
Luciferase reporter assays, promoter deletion analysis, protein-protein interaction assay (RIP140-PGC-1alpha), ectopic expression in brown adipocytes and nonadipogenic lines |
Molecular and cellular biology |
High |
18794372
|
| 2008 |
In apoptotic conditions, CIDEa redistributes from mitochondria to the nucleus in HeLa cells, and nuclear accumulation correlates with increased cell death. |
Immunocytochemistry and subcellular fractionation with tetracycline-inducible CIDEa expression, camptothecin/valinomycin treatment |
General physiology and biophysics |
Medium |
18645223
|
| 2009 |
Cold exposure down-regulates CIDEA mRNA and protein in rat interscapular BAT via sympathetically activated beta3-adrenoreceptors, and this effect is blocked by propranolol (non-selective beta-blocker) or SR59230A (selective beta3-antagonist). |
Cold exposure in vivo, pharmacological blockade with beta-adrenoreceptor antagonists, norepinephrine turnover measurement, qRT-PCR and western blot |
Biochemical and biophysical research communications |
Medium |
19577538
|
| 2010 |
The carboxy-terminal 104 amino acids of Cidea are sufficient for lipid droplet targeting and triglyceride accumulation, while the N-terminal domain is required for the development of enlarged (fused) lipid droplets; Cidea promotes lipid storage by inhibiting lipolysis (reduces basal glycerol release in differentiated 3T3-L1 adipocytes). |
Expression of deletion constructs in 3T3-L1 and COS-1 cells, fluorescence microscopy, triglyceride measurement, glycerol release assay |
Journal of lipid research |
High |
20810722
|
| 2010 |
SREBP-1c directly binds the Cidea promoter via a sterol-regulatory element (SRE) in mouse hepatocytes, mediating insulin-induced Cidea expression; Cidea in turn mediates SREBP-1c-dependent hepatic lipid accumulation. |
Luciferase reporter assay, EMSA, ChIP, adenovirus-mediated SREBP-1c overexpression and Cidea knockdown in hepatocytes from wild-type and SREBP-1c-null mice |
The Biochemical journal |
High |
20575761
|
| 2010 |
In human adipocytes, insulin decreases CIDEA expression, and CIDEA (not CIDEC) is responsible for starvation-induced apoptosis; RNAi depletion of CIDEA inhibits apoptosis similarly to insulin treatment. |
siRNA knockdown of CIDEA/CIDEC in human adipocytes, apoptosis assays, lipid droplet size measurement |
Journal of lipid research |
Medium |
20154362
|
| 2011 |
Insulin regulates CIDEA expression via PI3K and specifically through Akt1/2-dependent pathway; Akt1/2 knockdown prevents insulin-induced CIDEA downregulation and its anti-apoptotic effect. |
PI3K inhibitors (wortmannin, PI-103), Akt inhibitor (API-2), siRNA depletion of Akt1/2, apoptosis assay in human adipocytes |
Journal of lipid research |
Medium |
21636835
|
| 2011 |
CIDEA binds to liver X receptors (LXRs) in human white adipocytes and regulates their transcriptional activity; CIDEA localizes to both cytoplasm and nucleus in human white adipocytes. |
Protein-protein binding experiments, transactivation assays, cell fractionation of human white adipocytes |
FEBS letters |
Medium |
21315073
|
| 2011 |
In pancreatic beta-cells, palmitic acid-induced apoptosis upregulates Cidea downstream of FoxO1; FoxO1 suppression reduces palmitic acid-induced Cidea expression and apoptosis, placing Cidea as a critical downstream target of FoxO1 in FFA-induced beta-cell death. |
siRNA knockdown of Cidea and FoxO1 in beta-cells, palmitic acid treatment, apoptosis assay |
Molecular and cellular endocrinology |
Medium |
21945815
|
| 2012 |
Cidea functions as a transcriptional coactivator of C/EBPbeta in mammary epithelial cells: it translocates to the nucleus via a nuclear bipartite signal, physically interacts with C/EBPbeta, promotes C/EBPbeta association with the Xdh (XOR) promoter, and displaces HDAC1, thereby inducing XOR expression and milk lipid secretion. |
Nuclear fractionation, co-immunoprecipitation of Cidea with C/EBPbeta, ChIP for C/EBPbeta and HDAC1 on Xdh promoter, Cidea-deficient mouse mammary glands, ectopic expression in vivo |
Nature medicine |
High |
22245780
|
| 2012 |
Cidea promotes hepatic lipid accumulation by sensing dietary saturated fatty acids; saturated FAs induce Cidea expression via SREBP1c, and Cidea protein stability in hepatocytes is increased by FA treatment. Cidea overexpression in mouse liver increases hepatic lipid and large lipid droplet formation; Cidea deficiency reduces lipid accumulation in ob/ob mice. |
Adenoviral overexpression and knockdown in mouse liver and hepatocytes, ob/ob mouse model, SREBP1c knockdown, FA treatment, lipid droplet measurement |
Hepatology (Baltimore, Md.) |
High |
22278400
|
| 2014 |
Cidea is required for normal sebaceous gland lipid storage and sebum secretion; Cidea-deficient mice accumulate many small lipid droplets in sebocytes instead of large ones, leading to reduced skin surface lipids, dry hair, and defective thermoregulation. Overexpression of Cidea in human SZ95 sebocytes increases lipid storage and large LD formation. |
Cidea knockout mice, sebocyte lipid droplet imaging, skin surface lipid analysis, overexpression in SZ95 human sebocytes |
Molecular and cellular biology |
High |
24636991
|
| 2015 |
CIDEA promotes lipid droplet fusion via an amphipathic helix that embeds in the LD phospholipid monolayer and binds phosphatidic acid (PA); CIDEA forms trans-complexes at LD-LD contact sites through its N-terminal domain and C-terminal dimerization region, interacting with cone-shaped PA to increase phospholipid barrier permeability and enable lipid transfer between droplets. |
Mutagenesis of amphipathic helix, PA-binding assay, reconstitution of LD-LD docking, CIDEA complex analysis at contact sites, brown adipocyte differentiation assay |
eLife |
High |
26609809
|
| 2015 |
Transgenic expression of human Cidea in mouse adipose tissue increases adipose tissue expandability; in obese transgenic mice, Cidea preserves perilipin-1 and Akt expression in adipose tissue, reduces macrophage accumulation, and maintains adiponectin expression, resulting in enhanced insulin sensitivity. |
aP2-hCidea transgenic mice, high-fat diet challenge at thermoneutrality, western blot for perilipin/Akt, adiponectin measurement, insulin tolerance test |
Nature communications |
High |
26118629
|
| 2016 |
Cidea protein levels in brown fat are regulated post-transcriptionally (not transcriptionally) and are elevated in the thermogenically recruited state; overexpressed Cidea markedly suppresses UCP1 activity in isolated BAT mitochondria without changing UCP1 protein levels, but Cidea itself is not localized to mitochondria, implying an indirect inhibitory mechanism. |
aP2-hCidea transgenic mice, UCP1 activity assay in isolated mitochondria, Cidea protein/mRNA quantification across recruitment states, subcellular localization |
American journal of physiology. Endocrinology and metabolism |
High |
27923808
|
| 2019 |
CIDEA acts as a transcriptional regulator in human adipocytes: during britening, it shuttles from lipid droplets to the nucleus via a nuclear bipartite signal in a concentration-dependent manner, where it inhibits LXRalpha repression of the UCP1 enhancer and strengthens PPARgamma binding to the UCP1 enhancer, driving UCP1 transcription and thermogenesis. |
CRISPR-Cas9nD10A knockout of CIDEA in primary human adipocytes, nuclear fractionation, UCP1 enhancer reporter assay, chromatin binding assays, re-expression rescue |
iScience |
High |
31563853
|
| 2021 |
ER stress increases Cidea mRNA levels (partly through mRNA stabilization) and stabilizes CIDE-A protein against proteasomal degradation; elevated CIDE-A expression under ER stress accompanies increased cell death. ATF6 negatively regulates Cidea mRNA under ER stress. |
Acute and chronic ER stress induction in PCCL3 thyrocytes and other cell types, mRNA stability assays, proteasome inhibition, ATF6 modulation, cell death assays |
JCI insight |
Medium |
33661766
|
| 2022 |
METTL16 methyltransferase upregulates CIDEA expression in hepatocytes through m6A-dependent translational regulation, contributing to NAFLD progression. |
m6A sequencing, METTL16 overexpression and knockdown in HepG2 cells, quantification of CIDEA expression |
PeerJ |
Low |
36518278
|
| 2022 |
SENP2 (SUMO-specific protease 2) increases CIDEA expression by desumoylating ERRalpha, which then cooperates with PGC-1alpha to activate CIDEA transcription; palmitate treatment increases SENP2 and CIDEA levels and SENP2 or ERRalpha knockdown abolishes palmitate-induced CIDEA expression. |
SENP2 overexpression in 3T3-L1 adipocytes, ERRalpha knockdown, siRNA, palmitate treatment, luciferase reporter assay |
Biochemical and biophysical research communications |
Medium |
37748256
|
| 2023 |
Egr-1 transcription factor rhythmically couples with and represses Cidea expression in mouse liver; Egr-1 deletion disrupts this rhythmic coupling, leading to increased Cidea expression, large lipid droplet formation, and age-related hepatic metabolic dysfunction. |
Egr-1 knockout mice, circadian gene expression profiling, lipid droplet size analysis, circadian light-shift experiment |
Nature communications |
Medium |
36964140
|
| 2023 |
DNMT3B methylates the CIDEA promoter to suppress its expression; LPS-induced reduction of DNMT3B leads to promoter hypomethylation, increased SREBP-1c binding, and elevated CIDEA expression promoting hepatic lipid accumulation. Cidea knockdown reverses LPS-induced lipogenesis. |
DNMT3B overexpression/knockdown in mice and hepatocytes, bisulfite methylation assay of CIDEA promoter, SREBP-1c ChIP, CIDEA knockdown rescue |
Cellular and molecular gastroenterology and hepatology |
Medium |
37703946
|
| 2008 |
TNF-alpha negatively regulates CIDEA transcription in human adipocytes at least in part through an NF-kappaB binding site at position -163/-151 in the human CIDEA promoter; basal transcription is confined to the 97 bp upstream of the TSS. |
Luciferase reporter assays with deletion and mutant constructs, EMSA, TNF-alpha treatment of human adipocytes and 3T3-L1 cells |
International journal of obesity (2005) |
Medium |
18607384
|