Transcriptomic Profiling of Circular RNA in Different Brain Regions of Parkinson's Disease in a Mouse Model.
Jia E, Zhou Y, Liu Z, Wang L, Ouyang T, Pan M, Bai Y, Ge Q
This study maps circular RNA changes in the brains of mice with Parkinson's disease and identifies a specific molecular pathway involving NR4A2. It suggests that this pathway may play a role in the development of Parkinson's disease symptoms in these animals. The findings provide basic biological insights but do not offer direct clinical guidance for children with NR4A2-related syndromes.
- Researchers analyzed brain tissue from mice induced to have Parkinson's disease.
- They identified specific circular RNAs that change expression in different brain regions.
- The study highlights a pathway involving NR4A2, miRNA-132, and circRNAs.
- This pathway appears linked to synaptic function and neuron differentiation.
- The work is preclinical and does not involve human patients or treatments.
A monolayer hiPSC culture system for autophagy/mitophagy studies in human dopaminergic neurons.
Stathakos P, Jiménez-Moreno N, Crompton LA, Nistor PA, Badger JL, Barbuti PA, Kerrigan TL, Randall AD, Caldwell MA, Lane JD
Researchers develop a new method to grow human dopaminergic neurons in a flat layer, making it easier to study cellular cleanup processes like autophagy. This technique improves the efficiency and reliability of creating these specific nerve cells for laboratory testing.
- The protocol creates high numbers of midbrain dopaminergic neurons from stem cells.
- It uses a monolayer format suitable for imaging and functional assays.
- The system supports research into autophagy and mitophagy pathways.
- This is a preclinical tool development study with no human data.
Susceptibility to Cardiac Arrhythmias and Sympathetic Nerve Growth in VEGF-B Overexpressing Myocardium.
Lähteenvuo J, Hätinen OP, Kuivanen A, Huusko J, Paananen J, Lähteenvuo M, Nurro J, Hedman M, Hartikainen J, Laham-Karam N, Mäkinen P, Räsänen M, Alitalo K, Rosenzweig A, Ylä-Herttuala S
High levels of VEGF-B in heart tissue cause abnormal nerve growth and significantly increase the risk of dangerous heart rhythm problems and sudden cardiac death, even in animal models. This effect is linked to the activation of genes like NR4A2 that promote nerve development in the heart.
- VEGF-B overexpression causes abnormal heart nerve growth
- Increased risk of life-threatening arrhythmias and sudden death
- NR4A2 gene is activated, linking VEGF-B to nerve development
- Effect occurs independently of VEGFR-1 signaling
- High-dose VEGF-B gene therapy raises serious safety concerns
Nurr1Cd11bcre conditional knockout mice display inflammatory injury to nigrostriatal dopaminergic neurons.
Dong J, Liu X, Wang Y, Cai H, Le W
Deleting the Nurr1 gene specifically in mouse microglia makes these immune cells more reactive and prone to causing damage when the body faces inflammation. This inflammatory response leads to the loss of dopamine-producing neurons and the accumulation of abnormal protein clumps, which are key features of Parkinson's disease. The study suggests that Nurr1 normally helps keep brain immune cells calm to protect neurons from stress-induced injury.
- Nurr1 deletion in mouse microglia increases inflammatory activity without immediate neuron death.
- Inflammatory triggers cause dopamine neuron loss and alpha-synuclein clumping in these mice.
- Nurr1 protects dopamine neurons by regulating microglial responses to inflammation.
- Findings link Nurr1 function in immune cells to Parkinson's disease pathology.
Cadmium versus Lanthanum Effects on Spontaneous Electrical Activity and Expression of Connexin Isoforms Cx26, Cx36, and Cx45 in the Human Fetal Cortex.
Kocovic DM, Limaye PV, Colburn LCH, Singh MB, Milosevic MM, Tadic J, Petronijevic M, Vrzic-Petronijevic S, Andjus PR, Antic SD
This study found that three connexin proteins—Cx45, Cx36, and Cx26—are present in human fetal brain tissue, especially in neurons of the subplate and cortical plate, where they may help regulate electrical activity crucial for brain development. The proteins are sensitive to metals like cadmium and lanthanum, which could disrupt normal brain wiring.
- Cx45, Cx36, and Cx26 are expressed in fetal brain neurons
- Cx45 is on cell bodies; Cx26 is on dendrites too
- These connexins help control electrical activity in developing brain
- Metal exposure may disrupt their function
- Findings may explain brain development vulnerabilities
Parkin mutation decreases neurite complexity and maturation in neurons derived from human fibroblasts.
Pu J, Gao T, Zheng R, Fang Y, Ruan Y, Jin C, Shen T, Tian J, Zhang B
Parkin mutations in human neurons reduce the complexity and maturation of nerve cell branches, impairing the development of functional neurons from skin cells. This suggests parkin plays a key role in building and maintaining healthy brain cells.
- Parkin mutations harm neuron structure and development
- Neurons with mutations have fewer and shorter branches
- Maturation of new neurons is impaired
- Model uses human cells from skin fibroblasts
- Findings may help understand Parkinson’s and related disorders
Gene discovery for high-density lipoprotein cholesterol level change over time in prospective family studies.
Feitosa MF, Lunetta KL, Wang L, Wojczynski MK, Kammerer CM, Perls T, Schupf N, Christensen K, Murabito JM, Province MA
This study identifies NR4A2 as one of several genetic loci associated with changes in HDL cholesterol levels over time. The findings are based on population-level lipid metabolism research and do not provide clinical insights or treatment options for NR4A2-related neurodevelopmental syndromes.
- NR4A2 appears as a suggestive locus linked to longitudinal HDL-C changes.
- The study focuses on cardiovascular health, aging, and lipid metabolism.
- No clinical data or therapeutic implications for NR4A2 syndrome are presented.
- Results derive from large family-based genetic association studies.
3D Bioprinting Pluripotent Stem Cell Derived Neural Tissues Using a Novel Fibrin Bioink Containing Drug Releasing Microspheres.
Sharma R, Smits IPM, De La Vega L, Lee C, Willerth SM
Researchers successfully bioprinted neural tissues using human stem cells and a drug-releasing bioink that promotes the development of dopamine-producing neurons. The printed structures maintain high cell viability and express key markers for midbrain dopaminergic identity, including NURR1, over several weeks in culture. This work demonstrates a technical method for creating complex neural tissue models rather than offering a direct treatment.
- The study uses human stem cells to create 3D neural tissues via bioprinting technology.
- A fibrin bioink with drug-releasing microspheres supports cell survival and differentiation.
- Printed tissues express NURR1, a critical gene for dopaminergic neuron development.
- The approach generates complex tissue structures but remains preclinical laboratory research.
- No human trials or clinical applications are reported in this study.
TGFβ and Wnt Signaling Pathways Cooperatively Enhance Early Dopaminergic Differentiation of the Unrestricted Somatic Stem Cells.
Akhlaghpour A, Parvaneh Tafreshi A, Roussa E, Bernard C, Zeynali B
This study shows that TGFβ and Wnt signaling pathways work together to promote the early development of dopaminergic neurons from adult stem cells in a laboratory setting. The findings rely entirely on cell culture experiments and do not involve human patients or clinical treatments.
- TGFβ and Wnt pathways cooperate to increase Nurr-1, a marker for dopaminergic precursors.
- Blocking either pathway reduces the expression of key dopaminergic markers in stem cells.
- The research uses unrestricted somatic stem cells, not human participants or clinical data.
- This is preclinical molecular biology with no direct evidence for treating NR4A2-related syndromes.
Change of Nurr1 expression in mouse hippocampal CA3 region following excitotoxic neuronal damage.
Lee CH
This study shows that Nurr1 protein levels change in mouse hippocampal neurons after excitotoxic damage, but it does not address NR4A2-related syndrome or dopaminergic pathways. The findings are limited to a specific brain region in mice and do not translate to human clinical outcomes or treatments for this condition.
- Study uses mice, not humans, limiting direct relevance to patient care.
- Focuses on hippocampal CA3 damage, not the dopaminergic system affected in NR4A2 syndrome.
- Nurr1 expression changes after injury but offers no therapeutic insight for NR4A2 variants.
Oleic Acid Attenuates Ang II (Angiotensin II)-Induced Cardiac Remodeling by Inhibiting FGF23 (Fibroblast Growth Factor 23) Expression in Mice.
Liu T, Wen H, Li H, Xu H, Xiao N, Liu R, Chen L, Sun Y, Song L, Bai C, Ge J, Zhang Y, Chen J
Oleic acid reduces heart damage caused by high blood pressure in mice by blocking the harmful increase in a protein called FGF23. This effect happens because oleic acid stops a related protein, Nurr1, from moving into the cell's nucleus where it triggers FGF23 production.
- Oleic acid protects the heart from damage due to high blood pressure
- It works by reducing FGF23, a harmful protein in the heart
- Oleic acid blocks Nurr1 from entering the nucleus to turn on FGF23
- High FGF23 levels are linked to heart problems in people with hypertension
- This suggests oleic acid may help prevent heart remodeling
Pharmacological Stimulation of Nurr1 Promotes Cell Cycle Progression in Adult Hippocampal Neural Stem Cells.
Moon H, Jeon SG, Kim JI, Kim HS, Lee S, Kim D, Park S, Moon M, Chung H
Stimulating the Nurr1 protein with the drug amodiaquine accelerates cell division in adult neural stem cells. This effect occurs through specific molecular pathways that promote progression into the DNA synthesis phase of the cell cycle.
- Amodiaquine drives neural stem cells from rest into active division phases.
- The drug increases markers for cell proliferation and positive cell cycle regulators.
- Inhibitors block this effect, confirming specific molecular pathway involvement.
- Mouse brain studies confirm increased cell cycle markers in the hippocampus.
Dopaminergic induction of human dental pulp stem cells by photobiomodulation: comparison of 660nm laser light and polychromatic light in the nir.
Yurtsever MÇ, Kiremitci A, Gümüşderelioğlu M
Photobiomodulation with 660nm laser light boosts the expression of key dopaminergic neuron genes in human dental pulp stem cells, but these cells fail to become functional dopamine-producing neurons and die after transfer. The treatment shows promise for increasing protective proteins but does not lead to mature, viable dopaminergic neurons.
- 660nm laser increases dopaminergic gene expression in stem cells
- Cells do not become functional dopamine neurons
- Stem cells die after transfer to new plates
- Polychromatic light effects depend on culture conditions
- No functional maturation despite gene upregulation
Structural basis of NR4A1 bound to the human pituitary proopiomelanocortin gene promoter.
Jiang L, Wei H, Yan N, Dai S, Li J, Qu L, Chen X, Guo M, Chen Z, Chen Y
This study reveals how NR4A1 binds to a specific DNA region in the POMC gene, showing how the protein interacts with DNA through its two ends. The findings suggest that NR4A proteins may work together as pairs to control gene activity, which could help explain how they regulate important biological processes.
- NR4A1 binds DNA as a pair, not alone
- Protein touches DNA in both major and minor grooves
- Structure shows how NR4A proteins may work together
- Findings help explain gene regulation by NR4A proteins
NURR1 and ERR1 Modulate the Expression of Genes of a DRD2 Coexpression Network Enriched for Schizophrenia Risk.
Torretta S, Rampino A, Basso M, Pergola G, Di Carlo P, Shin JH, Kleinman JE, Hyde TM, Weinberger DR, Masellis R, Blasi G, Pennuto M, Bertolino A
This study shows that NURR1 regulates genes involved in dopamine signaling and schizophrenia risk, with lower NURR1 levels found in the brains of schizophrenia patients. It does not provide clinical evidence or treatment insights specific to NR4A2-related syndromes in children.
- NURR1 modulates expression of genes co-expressed with the dopamine D2 receptor.
- NURR1 levels are decreased in the prefrontal cortex of schizophrenia patients.
- Low NURR1 expression correlates with antipsychotic treatment in schizophrenia.
- The study focuses on schizophrenia mechanisms, not NR4A2 pediatric phenotypes.
Chronic waterborne exposure to benzo[a]pyrene induces locomotor dysfunction and development of neurodegenerative phenotypes in zebrafish.
Das SK, Aparna S, Patri M
Chronic exposure to benzo[a]pyrene causes movement problems and brain changes in zebrafish that resemble Parkinson’s disease, including loss of dopamine-producing neurons and altered levels of key brain proteins. The drug methylphenidate reduced some of these harmful effects, suggesting possible protective strategies.
- B[a]P exposure harms zebrafish movement and brain cells
- Dopamine neurons and key brain proteins are reduced
- Changes mirror Parkinson’s disease features
- Methylphenidate improved protein levels and behavior
- Zebrafish model shows environmental toxins can trigger neurodegeneration
Developmental Co-expression of Vglut2 and Nurr1 in a Mes-Di-Encephalic Continuum Preceeds Dopamine and Glutamate Neuron Specification.
Dumas S, Wallén-Mackenzie Å
This study maps the developmental timeline of mouse brain cells to show that Nurr1 and glutamate markers appear together before dopamine neurons fully form. It identifies a shared cellular origin for specific dopamine and glutamate neuron subtypes in the midbrain and diencephalon.
- Researchers tracked gene expression in developing mouse embryos from day 9.5 to 14.5.
- Vglut2 mRNA appears in early neurons before any dopamine markers are detected.
- Nurr1 and Vglut2 co-localize extensively in maturing dopamine neurons.
- Nurr1 and Vglut2 also overlap in diencephalic neurons that remain glutamatergic.
- Vglut2/Nurr1-positive cells give rise to both dopaminergic and glutamatergic neurons.
Transcriptomic Characterization of the Human Insular Cortex and Claustrum.
Ibrahim C, Le Foll B, French L
This study maps the gene activity in two specific brain regions, the insular cortex and claustrum, using tissue from adult and fetal human brains. It confirms that NR4A2 is specifically expressed in the claustrum but does not investigate its function or link to disease.
- Researchers analyzed gene expression in six adult and four fetal human brains.
- NR4A2 shows specific expression in the claustrum region of the brain.
- The insula has enriched genes linked to mood disorders and dopamine signaling.
- The claustrum has enriched genes linked to intellectual disability and epilepsy.
- No functional analysis or disease mechanism for NR4A2 is provided.
NURR1 inhibition reduces hypoxia-mediated cardiomyocyte necrosis via blocking Mst1-JNK-mPTP pathway.
Ma G, Liu Y
NURR1 increases heart cell death during low-oxygen conditions by activating a harmful pathway that opens pores in cells, leading to necrosis; blocking NURR1 protects heart cells by stopping this process.
- NURR1 levels rise during low oxygen in heart cells
- High NURR1 triggers cell death via Mst1-JNK-mPTP pathway
- Blocking NURR1 protects heart cells from dying
- This pathway could be a target for heart protection
- Findings are in heart cells under stress, not in humans with NR4A2 mutations
Altered Nurr1 protein expression in the hippocampal CA1 region following transient global cerebral ischemia.
Park JH, Ahn JH, Kim DW, Lee TK, Park CW, Park YE, Lee JC, Lee HA, Yang GE, Won MH, Lee CH
This study shows that Nurr1 protein levels change in the hippocampus of gerbils after a temporary loss of blood flow to the brain. The findings describe how these protein shifts correlate with neuron death in specific brain regions during ischemic injury.
- Nurr1 expression drops in hippocampal neurons within two days of ischemia.
- Protein concentration shifts and appears in microglia by four days post-injury.
- These changes are specific to the CA1 brain region, not surrounding areas.
- The study uses gerbils, a rodent model for cerebral ischemia research.
Structural basis of binding of homodimers of the nuclear receptor NR4A2 to selective Nur-responsive DNA elements.
Jiang L, Dai S, Li J, Liang X, Qu L, Chen X, Guo M, Chen Z, Chen L, Wei H, Chen Y
This study maps the precise atomic structure of how NR4A2 proteins bind to specific DNA sequences. It reveals that the protein forms dimers in two distinct ways depending on the DNA shape, with a specific amino acid change disrupting this binding.
- Crystal structures show NR4A2 binding to inverted and everted DNA repeats.
- Proteins form novel dimers on inverted repeats but bind independently on everted ones.
- Changing valine 298 to lysine prevents dimerization and DNA binding.
- Findings explain the molecular basis for NR4A2's specific DNA recognition.
Evaluation of changes in expression pattern of oxidative stress genes under the influence of adalimumab.
Grabarek BO, Wcisło-Dziadecka D, Sanakiewicz A, Kruszniewska-Rajs C, Gola J
Adalimumab, a drug used for psoriasis, alters the activity of many genes involved in oxidative stress in human skin cells. Two genes, NR4A2 and IL1RN, changed the most and may help track treatment response or resistance.
- Adalimumab changes oxidative stress genes in skin cells
- NR4A2 and IL1RN show the largest expression changes
- These genes could serve as markers for treatment monitoring
- Findings are from human skin cell experiments
- Results may inform therapy tracking in inflammatory conditions
Protective effects of L-arginine on the intestinal epithelial barrier under heat stress conditions in rats and IEC-6 cell line.
Huang L, Yin P, Liu F, Liu Y, Liu Y, Xia Z
L-arginine helps protect the gut lining in rats and gut cells under heat stress by reducing inflammation, strengthening the barrier, and boosting cellular cleanup processes. It supports the production of key proteins that maintain gut integrity and prevents cell death.
- L-arginine reduces gut damage from heat stress
- It boosts tight junction proteins that seal the gut lining
- L-arginine lowers inflammation and cell death
- It activates autophagy, a cellular cleanup process
- Results seen in both animal and cell models
The transcription factor FoxM1 activates Nurr1 to promote intestinal regeneration after ischemia/reperfusion injury.
Zu G, Guo J, Zhou T, Che N, Liu B, Wang D, Zhang X
This study shows that the protein FoxM1 activates Nurr1 to help intestinal cells regenerate after injury in rats and cell cultures. The findings suggest this pathway could be a target for treating intestinal damage, but they do not provide information about NR4A2-related syndromes or human treatments.
- FoxM1 directly binds to and activates Nurr1 transcription in intestinal cells.
- This activation promotes the proliferation of intestinal epithelial cells after injury.
- The research uses rat models and cell lines, not human patients.
- No connection to NR4A2 genetics or neurological symptoms is established.
Long-term triphenyltin exposure disrupts adrenal function in adult male rats.
Wu K, Li Y, Liu J, Mo J, Li X, Ge RS
Exposure to triphenyltin disrupts adrenal hormone production in male rats by interfering with key enzymes and signaling pathways involved in glucocorticoid synthesis, without affecting adrenal size or hormone levels in the blood.
- Triphenyltin lowers corticosterone, a stress hormone, in rats
- It disrupts adrenal enzyme activity needed for hormone production
- It alters cellular signaling pathways linked to energy and stress response
- It increases oxidative stress in adrenal cells at low doses
- No cell death occurred, but hormone production was impaired
Epigenetic Regulation of the Ontogenic Expression of the Dopamine Transporter.
Green AL, Eid A, Zhan L, Zarbl H, Guo GL, Richardson JR
This study identifies specific epigenetic changes that increase dopamine transporter levels in the developing rat brain. It shows that histone acetylation and the binding of transcription factors Nurr1 and Pitx3 drive this developmental increase in DAT expression.
- DAT mRNA and protein levels rise significantly during postnatal development in rats.
- Epigenetic modifiers change expression patterns as the brain matures.
- Nurr1 and Pitx3 bind more to the DAT promoter with age.
- Histone acetylation increases at the DAT gene locus during development.
Intrastriatal alpha-synuclein fibrils in monkeys: spreading, imaging and neuropathological changes.
Chu Y, Muller S, Tavares A, Barret O, Alagille D, Seibyl J, Tamagnan G, Marek K, Luk KC, Trojanowski JQ, Lee VMY, Kordower JH
Injecting alpha-synuclein fibrils into monkey brains causes Parkinson's-like damage and loss of dopamine neurons. The study finds that these pathological changes involve the downregulation of Nurr1, a protein critical for dopamine neuron survival. This model helps researchers understand how alpha-synuclein spreads and damages the brain in Parkinson's disease.
- Alpha-synuclein fibrils spread from injection sites to cause nigrostriatal neurodegeneration in monkeys.
- Dopamine transporter binding increases early in the pathological process before neuron loss occurs.
- Injected fibrils create Lewy body-like inclusions containing phosphorylated alpha-synuclein.
- Nigral neurons show reduced Nurr1 expression alongside dopamine marker downregulation.
- The model replicates key features of human Parkinson's disease pathology.
Function of Nr4a Orphan Nuclear Receptors in Proliferation, Apoptosis and Fuel Utilization Across Tissues.
Herring JA, Elison WS, Tessem JS
This review explains how NR4A2 and related proteins regulate cell growth, death, and energy use in various tissues. It details the molecular mechanisms behind these processes without focusing on specific disease treatments or human clinical outcomes.
- NR4A2 regulates cell proliferation, apoptosis, and fuel utilization across multiple tissues.
- These effects occur through both nuclear and non-genomic pathways.
- The review covers tissue-specific and family member-specific regulatory mechanisms.
- No human clinical data or treatment implications are presented.
Satb2 is required for the regionalization of retrosplenial cortex.
Zhang L, Song NN, Zhang Q, Mei WY, He CH, Ma P, Huang Y, Chen JY, Mao B, Lang B, Ding YQ
This study identifies Satb2 as a critical regulator that maintains retrosplenial cortex identity by actively repressing the gene Nr4a2 during brain development. Loss of Satb2 causes this brain region to lose its specific characteristics and adopt features of an adjacent area due to unchecked Nr4a2 expression.
- Satb2 is essential for defining retrosplenial cortex identity in developing mice.
- Satb2 functions by directly repressing the transcription of Nr4a2.
- Removing Satb2 causes retrosplenial neurons to adopt subiculum cell identities.
- Ectopic Nr4a2 expression drives this incorrect fate transition in brain tissue.
Chloroquine modulates inflammatory autoimmune responses through Nurr1 in autoimmune diseases.
Park TY, Jang Y, Kim W, Shin J, Toh HT, Kim CH, Yoon HS, Leblanc P, Kim KS
Chloroquine improves autoimmune symptoms in an animal model by activating the NR4A2 protein to boost regulatory T cells and suppress inflammatory ones. This study identifies NR4A2 as a mechanism for chloroquine's anti-inflammatory effects, suggesting it could be a target for new treatments. The findings are based on cell cultures and mice, not human patients.
- Chloroquine activates NR4A2 to increase regulatory T cells in animal models of autoimmune disease.
- The drug suppresses pathogenic inflammatory T cells through NR4A2-dependent mechanisms.
- Treatment improved symptoms in a mouse model of inflammatory bowel disease.
- Results are preclinical; no human clinical data or trials are reported here.
The Basic Helix-Loop-Helix Gene Nato3 Drives Expression of Dopaminergic Neuron Transcription Factors in Neural Progenitors.
Peterson DJ, Marckini DN, Straight JL, King EM, Johnson W, Sarah SS, Chowdhary PK, DeLano-Taylor MK
Overexpressing the gene Nato3 in developing chick embryos increases the production of genes essential for creating dopamine-producing neurons. This suggests that Nato3 acts as a regulator that helps establish the genetic networks required for these specific brain cells to form.
- Nato3 overexpression boosts key dopamine neuron genes in chick embryos.
- The study uses an in vivo model to track gene expression changes.
- Nato3 regulates Lmx1b, a critical factor for midbrain development.
- Findings identify Nato3 as a driver of dopaminergic transcriptional networks.
Cicadidae Periostracum, the Cast-Off Skin of Cicada, Protects Dopaminergic Neurons in a Model of Parkinson's Disease.
Lim HS, Kim JS, Moon BC, Choi G, Ryu SM, Lee J, Ang MJ, Jeon M, Moon C, Park G
Cicada skin extract protects dopaminergic neurons and improves movement in mice with Parkinson's-like symptoms by activating the Nurr1 pathway. This preclinical study demonstrates neuroprotection through reduced inflammation and mitochondrial stress, but it does not involve human patients or NR4A2-specific genetic variants.
- Cicada skin extract increases Nurr1 expression in mouse brain tissue and cell cultures.
- Treatment reduces neuroinflammation and prevents dopaminergic neuron death in Parkinson's mice.
- Mice show improved movement and recovery from dopamine depletion after treatment.
- The study uses MPTP-induced mouse models, not human clinical trials or NR4A2 patients.
Alpha synuclein deficiency increases CD4+ T-cells pro-inflammatory profile in a Nurr1-dependent manner.
Trudler D, Levy-Barazany H, Nash Y, Samuel L, Sharon R, Frenkel D
This study shows that a lack of alpha-synuclein triggers an overactive immune response in T-cells by increasing levels of the protein Nurr1. Silencing Nurr1 reduces this inflammation, suggesting it plays a key role in linking alpha-synuclein deficiency to immune system changes.
- Alpha-synuclein absence increases pro-inflammatory signals in CD4+ T-cells.
- High Nurr1 levels drive this inflammatory T-cell response.
- Reducing Nurr1 lowers inflammation and boosts anti-inflammatory cytokines.
- Findings link alpha-synuclein to immune regulation via Nurr1.
Iron Ion-Releasing Polypeptide Thermogel for Neuronal Differentiation of Mesenchymal Stem Cells.
Patel M, Lee HJ, Son S, Kim H, Kim J, Jeong B
Iron ions released from a biocompatible gel scaffold drive mesenchymal stem cells to express neuronal markers, including the NR4A2-related protein NURR1, in a laboratory setting. This study demonstrates that iron supplementation can promote neural differentiation of stem cells using a specific hydrogel delivery system.
- Iron ions released from a thermogel scaffold induce mesenchymal stem cells to differentiate into neuronal-like cells.
- Expression of NURR1, a protein linked to NR4A2 syndrome, increases significantly in the presence of iron.
- The gel provides a neutral pH environment and sustains iron release over 21 days for cell culture.
- This is an in vitro study using stem cells, not human patients or animal models.
NURR1 Impairment in Multiple Sclerosis.
Montarolo F, Martire S, Perga S, Bertolotto A
This review discusses how the NURR1 protein helps control inflammation in the brain and body, specifically within the context of multiple sclerosis. It highlights that while NURR1 is known for supporting dopamine neurons, its role in reducing inflammatory damage is also significant.
- NURR1 reduces inflammation by blocking pro-inflammatory molecules in immune cells.
- The protein functions in both peripheral blood and brain tissue like microglia.
- This paper reviews existing evidence linking NURR1 to multiple sclerosis pathology.
- The specific role of NURR1 in MS remains debated among researchers.
Nurr1, Pitx3, and α7 nAChRs mRNA Expression in Nigral Tissue of Rats with Pedunculopontine Neurotoxic Lesion.
Blanco-Lezcano L, Alberti-Amador E, González-Fraguela ME, Larrea GZ, Pérez-Serrano RM, Jiménez-Luna NA, Serrano-Sánchez T, Francis-Turner L, Camejo-Rodriguez D, Vega-Hurtado Y
This study measures changes in key dopaminergic genes in rat brains after inducing specific nerve damage to model Parkinson's disease progression. It finds that injury triggers early fluctuations in Nurr1 and Pitx3 expression while suppressing alpha-7 nicotinic receptor levels, suggesting these molecular shifts may precede neuron loss.
- The study uses a rat model with pedunculopontine nucleus lesions to mimic Parkinson's disease progression.
- Nurr1 mRNA levels increase significantly within the first two days after nerve injury.
- Pitx3 mRNA rises initially but decreases significantly by day three and day seven.
- Alpha-7 nicotinic receptor expression remains suppressed for at least one week post-injury.
- These molecular changes serve as early warning signals for potential nigral neurodegeneration.