Differential roles for Nr4a1 and Nr4a2 in object location vs. object recognition long-term memory.
McNulty SE, Barrett RM, Vogel-Ciernia A, Malvaez M, Hernandez N, Davatolhagh MF, Matheos DP, Schiffman A, Wood MA
This study uses animal models to show that the NR4A2 protein is essential for forming long-term memories of both object locations and object identities. The findings highlight specific brain regions where NR4A2 operates but do not provide direct evidence for human treatment or clinical outcomes.
- NR4A2 is required for long-term memory of object location and recognition in mice.
- NR4A1 is only needed for object location memory, unlike NR4A2.
- NR4A2 expression occurs in hippocampal and cortical areas linked to these memories.
- The study relies on siRNA knockdown in animal models, not human data.
Proteasomal inhibition as a treatment strategy for Parkinson's disease: the impact of α-synuclein on Nurr1.
Devine MJ
Proteasomal inhibition rescues Nurr1 function in cellular models of Parkinson's disease by preventing the degradation of the protein caused by alpha-synuclein. This mechanism suggests that enhancing proteasome activity could theoretically restore dopaminergic neuron survival, although this finding is limited to preclinical cell studies.
- Alpha-synuclein accumulation degrades Nurr1 in Parkinson's disease models.
- Proteasomal inhibition restores Nurr1 levels and function in these cells.
- The study uses cellular models, not human patients or animal trials.
- No direct evidence exists for treating NR4A2-related syndromes with this approach.
Dopaminergic-like cells from epigenetically reprogrammed mesenchymal stem cells.
Zhang Z, Alexanian AR
Researchers successfully converted human bone marrow stem cells into dopamine-producing neurons using chemical reprogramming. These modified cells expressed key dopaminergic markers and secreted dopamine, showing potential for neural repair in animal models.
- Human bone marrow stem cells convert to dopamine-like neurons via chemical reprogramming.
- Modified cells express Nurr-1 and tyrosine hydroxylase markers.
- Cells secrete neurotrophins and dopamine, especially after hypoxia preconditioning.
- Study uses cell lines and rat models, with no human clinical data.
Evidence for transcriptional factor dysregulation in the dorsal raphe nucleus of patients with major depressive disorder.
Kerman IA, Bernard R, Bunney WE, Jones EG, Schatzberg AF, Myers RM, Barchas JD, Akil H, Watson SJ, Thompson RC
This study finds that NR4A2 expression is reduced in the brain tissue of adults with major depressive disorder, linking it to mood regulation rather than motor function. It does not provide evidence for treatment or genetic causality in NR4A2-related syndromes.
- NR4A2 levels decrease in the dorsal raphe nucleus of depressed adults.
- The study focuses on serotonin pathways and mood, not dopamine or movement.
- Findings are observational and do not suggest a therapy for NR4A2 syndromes.
Inflammation and neurological disease-related genes are differentially expressed in depressed patients with mood disorders and correlate with morphometric and functional imaging abnormalities.
Savitz J, Frank MB, Victor T, Bebak M, Marino JH, Bellgowan PS, McKinney BA, Bodurka J, Kent Teague T, Drevets WC
This study identifies NR4A2 as one of twelve genes with altered expression in the blood of adults with depression, linking these molecular changes to specific brain imaging abnormalities. It does not provide information on NR4A2-related syndrome in children or potential treatments for this condition.
- NR4A2 shows differential gene expression in depressed adults compared to healthy controls.
- Gene expression levels correlate with structural and functional brain imaging changes.
- The study focuses on mood disorders, not pediatric NR4A2 syndrome.
- No clinical interventions or treatments for NR4A2 variants are discussed.
Nur-related receptor 1 gene polymorphisms and alcohol dependence in Mexican Americans.
Wei YM, Du YL, Nie YQ, Li YY, Wan YJ
Certain variations in the NURR1 gene are linked to alcohol dependence in Mexican Americans, suggesting that disruptions in the NURR1/dopamine pathway may contribute to this condition. The findings highlight potential biological pathways relevant to neurodevelopmental and psychiatric traits.
- Specific NURR1 gene variations are tied to alcohol dependence
- NURR1/dopamine signaling may play a role in addiction
- Findings are specific to Mexican American populations
- Genetic differences were stronger in non-obese individuals
- No variation found in other studied NURR1 regions
Histamine contributes to increased RANKL to osteoprotegerin ratio through altered nuclear receptor 4A activity in human chondrocytes.
Marzaioli V, McMorrow JP, Angerer H, Gilmore A, Crean D, Zocco D, Rooney P, Veale D, Fearon U, Gogarty M, McEvoy AN, Stradner MH, Murphy EP
Histamine increases joint damage by shifting the balance toward bone breakdown through changes in NR4A2 activity in cartilage cells. This occurs via H1 and H2 histamine receptors, which alter the ratio of RANKL to OPG, a key driver of joint destruction.
- Histamine worsens joint damage via H1/H2 receptors
- NR4A2 activity is altered by histamine in cartilage cells
- RANKL increases while OPG stays stable, raising imbalance
- NR4A1-3 knockdown reduces OPG and blocks histamine effects
- This pathway may contribute to arthritis progression
High-dimensional gene expression profiling studies in high and low responders to primary smallpox vaccination.
Haralambieva IH, Oberg AL, Dhiman N, Ovsyannikova IG, Kennedy RB, Grill DE, Jacobson RM, Poland GA
This study found that differences in immune response to smallpox vaccination are linked to variations in the activity of specific genes and immune pathways, including NR4A2, which plays a role in immune regulation and inflammation.
- NR4A2 is among genes differing in activity between strong and weak vaccine responders.
- Immune pathways involving interferons and T-helper 17 cells are strongly linked to vaccine response.
- Differences in gene expression may explain why some people respond better to vaccines than others.
- These findings could help identify biological markers for vaccine effectiveness.
A novel nuclear FGF Receptor-1 partnership with retinoid and Nur receptors during developmental gene programming of embryonic stem cells.
Lee YW, Terranova C, Birkaya B, Narla S, Kehoe D, Parikh A, Dong S, Ratzka A, Brinkmann H, Aletta JM, Tzanakakis ES, Stachowiak EK, Claus P, Stachowiak MK
This study identifies a molecular mechanism where nuclear FGFR1 interacts with Nurr1 and retinoid receptors to drive gene expression during early cell differentiation. It demonstrates that this partnership regulates neuronal development in embryonic stem cells through synergistic activation of specific genetic pathways.
- Nuclear FGFR1 partners with Nurr1 and retinoid receptors to regulate developmental genes.
- This interaction drives neuronal differentiation and neuritic outgrowth in stem cells.
- The mechanism involves direct binding to regulatory DNA sequences like RAREs.
- Findings are based on embryonic stem cell models, not human patients or animals.
Vitamin D and Parkinson's disease.
Vinh Quôc Luong K, Thi Hoàng Nguyên L
This review suggests that low vitamin D levels are associated with Parkinson's disease and proposes that active vitamin D (calcitriol) may help by reducing inflammation. It identifies Nurr1 (NR4A2) as one of several proteins linking vitamin D to Parkinson's pathology, but it does not provide specific evidence for NR4A2-related syndromes or children.
- Low serum vitamin D is associated with Parkinson's disease risk and severity.
- Vitamin D supplementation may offer clinical benefits in Parkinson's patients.
- Nurr1 (NR4A2) is listed as a protein linking vitamin D to Parkinson's pathology.
- Calcitriol, the active form of vitamin D, modulates inflammatory cytokines.
- The paper reviews general mechanisms without focusing on NR4A2 mutations or pediatric phenotypes.
Adenosine A(3) receptor-induced proliferation of primary human coronary smooth muscle cells involving the induction of early growth response genes.
Hinze AV, Mayer P, Harst A, von Kügelgen I
This study investigates how adenosine receptors influence the growth of human coronary artery smooth muscle cells, a process unrelated to the neurological development affected by NR4A2 mutations. The research identifies specific molecular pathways involving EGR2 and EGR3 transcription factors that drive cell proliferation in heart tissue.
- The paper focuses on cardiovascular smooth muscle cells, not brain or dopaminergic neurons.
- NR4A2 is mentioned only to show it was not induced by the tested adenosine agonist.
- Findings relate to vascular biology and restenosis mechanisms in the heart.
- No connection exists between these coronary cell pathways and NR4A2-related neurodevelopmental disorders.
Ginkgo biloba extract (EGb 761) modulates the expression of dopamine-related genes in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced Parkinsonism in mice.
Rojas P, Ruiz-Sánchez E, Rojas C, Ogren SO
Ginkgo biloba extract restores dopamine-related gene expression in mice with chemically induced Parkinsonism. The treatment specifically upregulates Nurr1 and tyrosine hydroxylase levels in brain regions controlling movement.
- Study uses MPTP-toxicity mouse model, not human patients or NR4A2 variants.
- Ginkgo extract increases Nurr1 mRNA and protein in midbrain and striatum.
- Results show neuroprotection via dopamine gene regulation in rodents only.
- No clinical data on efficacy, safety, or dosage for humans exists.
Schizophrenia-like features in transgenic mice overexpressing human HO-1 in the astrocytic compartment.
Song W, Zukor H, Lin SH, Hascalovici J, Liberman A, Tavitian A, Mui J, Vali H, Tong XK, Bhardwaj SK, Srivastava LK, Hamel E, Schipper HM
Overexpressing the stress protein HO-1 in mouse astrocytes disrupts dopamine and serotonin signaling, leading to schizophrenia-like behaviors and brain pathology. This study identifies glial HO-1 as a potential driver of monoaminergic circuit damage but does not test treatments or involve human patients with NR4A2-related conditions.
- Mouse astrocytes overexpressing HO-1 show oxidative stress and mitochondrial damage.
- Dopamine and serotonin levels increase, while D1 receptor binding decreases in the brain.
- Male mice exhibit impaired prepulse inhibition and hyperkinetic behavior resembling schizophrenia.
- The study suggests glial HO-1 containment may help neurodevelopmental disorders.
- No human data or NR4A2-specific findings are presented.
Human midbrain precursors activate the expected developmental genetic program and differentiate long-term to functional A9 dopamine neurons in vitro. Enhancement by Bcl-X(L).
Seiz EG, Ramos-Gómez M, Courtois ET, Tønnesen J, Kokaia M, Liste Noya I, Martínez-Serrano A
This study demonstrates that human midbrain precursor cells can successfully differentiate into functional dopamine neurons in a lab dish, confirming the genetic program required for this development. The research shows that adding Bcl-X(L) enhances the survival and maturation of these neurons by boosting key genes including NURR1 (NR4A2).
- Human midbrain precursors generate mature, functional A9 dopamine neurons in vitro.
- Differentiation activates all necessary genetic cascades for neuron maturation.
- Bcl-X(L) expression increases key developmental genes like NURR1 and PITX3.
- Bcl-X(L) improves the survival and long-term function of generated neurons.
Efficacy of concurrent administration of cilostazol and methotrexate in rheumatoid arthritis: pharmacologic and clinical significance.
Kim HY, Lee SW, Park SY, Baek SH, Lee CW, Hong KW, Kim CD
Cilostazol combined with methotrexate reduces inflammation and joint damage in rheumatoid arthritis by blocking harmful immune signals and protecting joint tissue. The treatment works by boosting cAMP signaling, which helps control overactive immune cells in the joints.
- Cilostazol and methotrexate together reduce joint inflammation
- They block key inflammatory proteins like TNF-α and IL-6
- The combo boosts cell death in harmful joint cells
- It protects bone and cartilage in arthritis models
- Effect depends on cAMP signaling pathways
low2012-07-18 · Biomarkers : biochemical indicators of exposure, response, and susceptibility to chemicals
Leukocyte Nurr1 as peripheral biomarker of early-life environmental exposure to permethrin insecticide.
Fedeli D, Montani M, Carloni M, Nasuti C, Amici A, Gabbianelli R
This study identifies Nurr1 as a peripheral biomarker for early-life exposure to the insecticide permethrin in aging rats. It demonstrates that this exposure increases Nurr1 levels and lipid peroxidation in leukocytes, suggesting potential long-term inflammatory impacts.
- The study uses rats, not humans, limiting direct clinical applicability.
- Permethrin exposure during early life elevates Nurr1 in aging animals.
- Nurr1 serves as a biomarker for xenobiotic impact in old age.
- Inflammatory markers like TNF-α also increase with this exposure.
Exogenous Nurr1 gene expression in electrically-stimulated human MSCs and the induction of neurogenesis.
Park JS, Yang HN, Woo DG, Jeon SY, Do HJ, Huh SH, Kim NH, Kim JH, Park KH
Combining electrical stimulation with Nurr1 gene delivery in human stem cells significantly increases neurite outgrowth compared to either treatment alone. This suggests that these two factors work together to promote nerve cell differentiation in a laboratory setting.
- Electrical stimulation and Nurr1 gene expression act synergistically to induce neurogenesis.
- Combined treatment yields mean neurite lengths of 150 μm, far exceeding single treatments.
- Single treatments result in minimal neurite growth of only 10-20 μm.
- The study uses human mesenchymal stem cells in an in vitro culture system.
The synergistic effect of beta-boswellic acid and Nurr1 overexpression on dopaminergic programming of antioxidant glutathione peroxidase-1-expressing murine embryonic stem cells.
Abasi M, Massumi M, Riazi G, Amini H
This study shows that combining Nurr1 overexpression with beta-boswellic acid improves the generation of dopamine-producing neurons from mouse stem cells. The addition of an antioxidant enzyme further increases cell survival during this process.
- Researchers engineered mouse stem cells to produce Nurr1 and an antioxidant enzyme.
- Beta-boswellic acid synergizes with Nurr1 to boost dopamine neuron creation.
- The modified cells successfully produced and secreted dopamine in response to stimuli.
- Antioxidant expression improved the survival rate of developing neural cells.
- Findings suggest potential for future stem cell therapies for Parkinson's disease.
Dual function of Pin1 in NR4A nuclear receptor activation: enhanced activity of NR4As and increased Nur77 protein stability.
van Tiel CM, Kurakula K, Koenis DS, van der Wal E, de Vries CJ
The enzyme Pin1 stabilizes the NR4A2 protein (Nurr1) and boosts its activity by preventing it from being broken down in cells. This stabilization depends on specific phosphorylation sites, while the enhancement of transcriptional activity does not require Pin1's enzymatic function.
- Pin1 binds to all three NR4A nuclear receptors, including Nurr1.
- Pin1 increases Nur77 protein stability by blocking its degradation.
- Enhanced receptor activity occurs independently of Pin1's isomerase function.
- Stabilization requires specific phosphorylation motifs on the target protein.
Gene expression profiling of acute graft-vs-host disease after hematopoietic stem cell transplantation.
Verner J, Kabathova J, Tomancova A, Pavlova S, Tichy B, Mraz M, Brychtova Y, Krejci M, Zdrahal Z, Trbusek M, Volejnikova J, Sedlacek P, Doubek M, Mayer J, Pospisilova S
Certain genes, including NR4A2, are more active in children with severe acute graft-versus-host disease after stem cell transplant, and their levels can predict whether a child will survive or not. This suggests that measuring these genes early may help guide treatment decisions.
- NR4A2 is upregulated in severe aGVHD
- Gene patterns predict survival after aGVHD
- These genes are linked to immune overactivity
- Testing blood gene levels may guide care
Orphan nuclear receptor NR4A2 induces synoviocyte proliferation, invasion, and matrix metalloproteinase 13 transcription.
Mix KS, McMahon K, McMorrow JP, Walkenhorst DE, Smyth AM, Petrella BL, Gogarty M, Fearon U, Veale D, Attur MG, Abramson SB, Murphy EP
This study shows that NR4A2 drives joint inflammation and cartilage destruction in arthritis by promoting cell growth and the production of tissue-damaging enzymes. It identifies NR4A2 as a key mediator of TNFα signaling in synovial tissue, suggesting it could be a therapeutic target for inflammatory joint diseases.
- NR4A2 levels are elevated in inflamed joint tissues from arthritis patients.
- TNFα rapidly increases NR4A2 expression in synoviocytes.
- NR4A2 promotes synoviocyte proliferation, migration, and invasion.
- NR4A2 directly activates MMP-13, an enzyme that destroys cartilage.
- Depleting NR4A2 reduces joint inflammation markers in experimental models.
Dopaminergic neuronal conversion from adult rat skeletal muscle-derived stem cells in vitro.
Yang J, Wang X, Wang Y, Guo ZX, Luo DZ, Jia J, Wang XM
Researchers successfully convert adult rat skeletal muscle stem cells into dopaminergic neurons in a laboratory dish. The study demonstrates that these converted cells express key markers of dopamine-producing neurons and genes like Nurr1, which is relevant to NR4A2 biology.
- Adult rat muscle stem cells differentiate into dopaminergic neurons in vitro.
- Cells express tyrosine hydroxylase and dopamine transporter after differentiation.
- Key developmental genes including Nurr1 upregulate during the process.
- The study uses only rat cells, not human tissue or patients.
Expression patterns of Nurr1 in rat retina development.
Li Y, Qi Q, Cong B, Shi W, Liu X, Zhang G, Ma C
This study maps where and when the Nurr1 protein appears in developing rat retinas, finding it peaks shortly after birth. It identifies Nurr1 as a marker for specific non-dopamine amacrine cells rather than just dopaminergic neurons.
- Nurr1 expression peaks in rat retinas between postnatal days 3 and 7.
- The protein marks differentiated, migrating cells, not those actively dividing.
- Nurr1 identifies specific amacrine cells within the retina structure.
- Most Nurr1-positive cells do not produce tyrosine hydroxylase.
- Findings describe normal developmental biology in rats, not human disease mechanisms.
Subclinical exposure to low-dose endotoxin impairs EEG maturation in preterm fetal sheep.
Keogh MJ, Bennet L, Drury PP, Booth LC, Mathai S, Naylor AS, Fraser M, Gunn AJ
Low-level exposure to bacterial toxins disrupts normal brain electrical activity development in fetal sheep, causing inflammation without killing neurons. This finding highlights a general mechanism of neurodevelopmental injury from infection but does not address the specific genetic cause of NR4A2 syndrome.
- Subclinical endotoxin exposure impairs EEG maturation in fetal sheep brains.
- The effect involves neural inflammation without hemodynamic disturbances or cortical cell death.
- This is a preclinical animal model study with no human clinical data.
- The mechanism is unrelated to the specific NR4A2 genetic pathway.
The human testis-determining factor SRY localizes in midbrain dopamine neurons and regulates multiple components of catecholamine synthesis and metabolism.
Czech DP, Lee J, Sim H, Parish CL, Vilain E, Harley VR
The SRY gene, typically associated with male sex determination, is present in specific human midbrain dopamine neurons and directly regulates the enzymes responsible for producing and breaking down dopamine. In cell models, manipulating SRY levels changes the expression of key dopamine-related proteins, suggesting it acts as a positive regulator of catecholamine synthesis in the human brain.
- SRY protein is found in male human substantia nigra dopamine neurons.
- SRY knockdown reduces dopamine synthesis enzymes like TH and DDC.
- SRY overexpression increases dopamine levels and related enzyme expression.
- SRY directly activates the promoter region of the human TH gene.
- This mechanism may explain gender biases in dopamine-related disorders.
Prostanoid EP₁ receptors mediate up-regulation of the orphan nuclear receptor Nurr1 by cAMP-independent activation of protein kinase A, CREB and NF-κB.
Ji R, Sanchez CM, Chou CL, Chen XB, Woodward DF, Regan JW
This study identifies a specific molecular pathway in cell lines where prostaglandin E2 increases Nurr1 levels through Rho, PKA, CREB, and NF-κB signaling. The findings describe basic cellular mechanisms without testing any interventions in humans or animal models of NR4A2-related syndrome.
- The research uses human kidney and neuroblastoma cell lines to study Nurr1 regulation.
- Prostaglandin E2 up-regulates Nurr1 via a cAMP-independent PKA pathway.
- No animal models, clinical trials, or patient data are included in this work.
- The mechanism links inflammation signaling to transcription factor expression.
In vitro generation of mature dopamine neurons by decreasing and delaying the expression of exogenous Nurr1.
Park CH, Lim MS, Rhee YH, Yi SH, Kim BK, Shim JW, Kim YH, Jung SJ, Lee SH
Researchers demonstrate that controlling the timing and amount of Nurr1 protein production allows stem cells to mature into functional dopamine neurons. This method improves the quality of lab-grown neurons by mimicking natural developmental patterns.
- Manipulating Nurr1 expression levels creates more mature dopamine neurons from stem cells.
- Forced, constant Nurr1 expression produces immature or non-neuronal cells.
- Mimicking natural developmental timing enhances neuronal maturation in culture.
Molecular diversity of early-born subplate neurons.
Hoerder-Suabedissen A, Molnár Z
This study characterizes the timing and molecular markers of early-born subplate neurons in mouse brains, identifying Nr4a2 (Nurr1) as one of several co-expressed markers. It confirms that these specific neurons are generated during embryonic days 11.5 to 12.5 and survive preferentially into the postnatal period.
- Nr4a2 is expressed in early-born subplate neurons in mouse brains.
- These neurons are generated between embryonic days 11.5 and 12.5.
- The study uses birthdating to correlate gene expression with cell origin.
- Research focuses on basic developmental biology, not human disease or treatment.
Genome wide expression profiling of the mesodiencephalic region identifies novel factors involved in early and late dopaminergic development.
Chakrabarty K, Von Oerthel L, Hellemons A, Clotman F, Espana A, Groot Koerkamp M, Holstege FC, Pasterkamp RJ, Smidt MP
This study maps gene activity in developing dopamine neurons and identifies how Nurr1 works with Pitx3 to activate specific nicotinic acetylcholine receptor subunits. It reveals two distinct regulatory pathways controlling these receptors during early neuronal development.
- Nurr1 cooperates with Pitx3 to activate Chrna6 and Chrnb3 subunits in developing dopamine neurons.
- Two divergent regulatory pathways control the expression of these specific receptor subunits.
- The research identifies novel transcription factors, Oct2 and Oct3, involved in generating the dopamine neuronal field.
SFRP1 and SFRP2 dose-dependently regulate midbrain dopamine neuron development in vivo and in embryonic stem cells.
Kele J, Andersson ER, Villaescusa JC, Cajanek L, Parish CL, Bonilla S, Toledo EM, Bryja V, Rubin JS, Shimono A, Arenas E
This study shows that specific proteins (SFRP1 and SFRP2) help guide the development of dopamine neurons in mice and stem cells by activating a particular signaling pathway. While these proteins promote the growth of dopamine neurons in laboratory settings, removing them in mice causes only minor developmental changes with no obvious physical symptoms.
- SFRP1 and SFRP2 activate Wnt/PCP signaling to support dopamine neuron development.
- Low-to-medium levels of these proteins enhance dopamine differentiation in stem cells.
- Mice lacking both genes show minor brain structure changes but no major defects.
- The findings suggest potential uses for improving stem cell therapies in the lab.