Identification of embryonic stem cell-derived midbrain dopaminergic neurons for engraftment.
Ganat YM, Calder EL, Kriks S, Nelander J, Tu EY, Jia F, Battista D, Harrison N, Parmar M, Tomishima MJ, Rutishauser U, Studer L
This study identifies a specific stage of embryonic stem cell-derived midbrain dopamine neurons—marked by Nurr1 expression—that survives best after transplantation and effectively improves motor symptoms in a Parkinson's disease model. The findings suggest this stage is ideal for future cell therapies targeting dopamine loss.
- Nurr1+ mid-stage neurons survive best after transplant
- These neurons restore motor function in Parkinson's mice
- The method uses genetic tags to isolate precise neuron stages
- New midbrain genes were discovered during development
- Purified cells reduce risk of tumors or wrong cell types
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
NR4A2 is a key driver of joint damage in inflammatory arthritis by making synovial cells grow uncontrollably, invade surrounding tissue, and produce enzymes that destroy cartilage. Blocking NR4A2 reduces these harmful processes, suggesting it could be a target for new treatments.
- NR4A2 is overactive in arthritic joints
- It makes synovial cells multiply and invade tissue
- NR4A2 boosts cartilage-destroying enzymes
- Reducing NR4A2 slows joint damage
- Could lead to new arthritis treatments
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
Adult rat muscle stem cells can be turned into dopamine-producing neurons in the lab, suggesting a potential source for future cell therapies in Parkinson's disease and other conditions involving dopamine loss.
- Muscle stem cells can become dopamine neurons in lab tests
- The process uses specific growth factors and chemicals
- Key genes for dopamine neurons are activated
- This could lead to personalized cell treatments
- Relevance to Parkinson's disease is strong
Expression patterns of Nurr1 in rat retina development.
Li Y, Qi Q, Cong B, Shi W, Liu X, Zhang G, Ma C
Nurr1 is active in developing retinal cells in rats, particularly in amacrine cells, and helps guide their maturation. It is not found in dividing cells, suggesting a role in cell differentiation rather than growth.
- Nurr1 appears in retinal cells during development
- It marks differentiating amacrine cells, not dividing ones
- Nurr1 is present in both dopaminergic and non-dopaminergic retinal cells
- Peak expression occurs in early postnatal life
- Nurr1 likely helps control retinal cell maturation
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-dose exposure to endotoxin in preterm fetal sheep disrupts normal brain electrical activity development, even without visible brain damage or changes in blood flow, suggesting that subtle infections during pregnancy may impair early brain maturation through inflammation.
- Subclinical infection impairs EEG development in preterm fetal sheep
- Inflammation occurs without major blood or heart changes
- Brain cell damage is minimal, but immune activity increases
- EEG changes suggest disrupted brain maturation
- Findings may relate to neurodevelopmental issues in preterm infants
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
SRY, the gene that determines male sex, is found in dopamine-producing brain cells in males and helps control the production and breakdown of dopamine. It boosts key enzymes and receptors involved in dopamine signaling, which may explain why males are more prone to dopamine-related disorders like Parkinson's disease.
- SRY is present in male dopamine neurons in the brain
- SRY boosts dopamine-making enzymes and receptors
- SRY increases dopamine levels in human cells
- This may explain male vulnerability to Parkinson's and schizophrenia
- SRY acts as a master regulator of dopamine pathways
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
Prostaglandin E2 activates EP1 receptors to increase Nurr1 levels through a pathway that bypasses cAMP and instead uses PKA, CREB, and NF-κB. This mechanism may protect cells from death and could be relevant to NR4A2-related conditions.
- EP1 receptor activation boosts Nurr1 without raising cAMP
- PKA, CREB, and NF-κB are key in increasing Nurr1
- This pathway may help cells survive stress or damage
- Nurr1 upregulation could influence neurological function
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
Turning neural stem cells into mature dopamine neurons requires carefully timed and controlled Nurr1 expression—too much or too early leads to immature or non-neuronal cells. The study shows that reducing and delaying Nurr1 expression produces functional, mature dopamine neurons similar to those in the developing brain.
- Nurr1 must be turned on at the right time and level
- Too much or too early Nurr1 creates immature cells
- Delayed, reduced Nurr1 leads to mature dopamine neurons
- This mimics natural midbrain development
- Potential for better cell therapies for Parkinson’s
Molecular diversity of early-born subplate neurons.
Hoerder-Suabedissen A, Molnár Z
Early-born subplate neurons in mice express specific molecular markers like NR4A2 (Nurr1), and their birthdate and survival are linked to these markers, suggesting distinct functional roles. These neurons are critical for cortical development and may influence brain circuit formation.
- NR4A2 is expressed in early-born subplate neurons in mice
- Neurons with NR4A2 are born around E11.5–E12.5
- NR4A2-expressing neurons survive better after birth
- NR4A2 marks a specific subset of subplate neurons with developmental importance
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 identifies key genes and regulatory pathways involved in the development of dopamine-producing brain cells, including the role of NR4A2 (Nurr1) in controlling genes linked to nicotine receptor function. It reveals how Nurr1 works with another protein, Pitx3, to turn on these genes, which may influence brain development and function.
- Nurr1 works with Pitx3 to control dopamine neuron genes
- Nicotine receptor genes are turned on by Nurr1 in developing brain cells
- Two separate pathways regulate key dopamine neuron genes
- Findings may help explain how dopamine neurons form and function
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
sFRP1 and sFRP2 help guide the development of dopamine neurons in the midbrain by boosting a specific Wnt signaling pathway. Low to moderate levels of these proteins improve the formation of dopamine neurons from stem cells, which could help in developing better cell-based therapies.
- sFRP1 and sFRP2 boost Wnt/PCP signaling in dopamine neuron development
- Low/medium levels of sFRPs enhance dopamine neuron formation from stem cells
- These proteins help shape the midbrain and guide dopamine cell maturation
- Findings may improve stem cell therapies for dopamine-related disorders
Cooperation of nuclear fibroblast growth factor receptor 1 and Nurr1 offers new interactive mechanism in postmitotic development of mesencephalic dopaminergic neurons.
Baron O, Förthmann B, Lee YW, Terranova C, Ratzka A, Stachowiak EK, Grothe C, Claus P, Stachowiak MK
Nuclear FGFR1 and Nurr1 work together in the developing brain to turn on the gene for dopamine production, which is critical for the function of brain cells affected in NR4A2-related syndrome. This partnership may offer a new target for treatments aimed at improving brain development or function in children with NR4A2 mutations.
- Nurr1 and nuclear FGFR1 cooperate to activate dopamine-making genes
- Their interaction boosts the TH gene, essential for dopamine synthesis
- This partnership could be a target for treating NR4A2-related disorders
- Found in developing brain cells that make dopamine
- May help explain how NR4A2 mutations disrupt brain development
Differences in NGFI-B, Nurr1, and NOR-1 expression and nucleocytoplasmic translocation in glutamate-treated neurons.
Boldingh Debernard KA, Mathisen GH, Paulsen RE
In neurons exposed to glutamate, the NR4A2 protein (Nurr1) stays mostly in the nucleus, while another related protein (NGFI-B) moves to the cytoplasm and mitochondria, which may trigger cell death. This shift in location suggests NGFI-B and Nurr1 have different roles during brain cell stress. The movement of NGFI-B is tightly controlled by a specific protein change.
- NGFI-B moves to mitochondria during brain cell stress, possibly causing cell death
- Nurr1 (NR4A2) stays in the nucleus, suggesting a protective role
- A single protein change can disrupt NGFI-B's location
- Differences in movement may explain why these proteins have distinct functions
- This process is linked to calcium influx and excitotoxicity
Differentiation of chromaffin progenitor cells to dopaminergic neurons.
Vukicevic V, Schmid J, Hermann A, Lange S, Qin N, Gebauer L, Chunk KF, Ravens U, Eisenhofer G, Storch A, Ader M, Bornstein SR, Ehrhart-Bornstein M
Chromaffin progenitor cells from adult adrenal glands can be guided to become functional dopamine-producing neurons that release dopamine in response to stimulation, with enhanced dopamine output when treated with retinoic and ascorbic acid. These neurons show mature electrical properties and express key genes like Nurr1 and Pitx3, which are critical for dopamine neuron development.
- Chromaffin progenitors can become dopamine neurons
- Retinoic and ascorbic acid boost dopamine release
- Neurons show mature electrical activity
- Nurr1 and Pitx3 are expressed during differentiation
- Potential for cell replacement therapy in Parkinson’s
Lmx1b can promote the differentiation of embryonic stem cells to dopaminergic neurons associated with Parkinson's disease.
Tian LP, Zhang S, Zhang YJ, Ding JQ, Chen SD
Forcing the expression of the LMX1B gene in embryonic stem cells greatly increases the production of functional dopamine-producing neurons, which are the type lost in Parkinson's disease. These neurons show key markers of mature A9 dopamine neurons and can take up dopamine, indicating they are fully functional.
- LMX1B boosts dopamine neuron production from stem cells
- Resulting neurons are mature and functional
- High levels of key dopamine neuron markers detected
- Potential for cell-based Parkinson's therapies
Direct regulation of Pitx3 expression by Nurr1 in culture and in developing mouse midbrain.
Volpicelli F, De Gregorio R, Pulcrano S, Perrone-Capano C, di Porzio U, Bellenchi GC
Nurr1 directly controls the expression of Pitx3, a key gene for midbrain dopamine neurons, by binding to a specific site in the Pitx3 gene. This interaction is essential for the proper development and function of these neurons, which are affected in NR4A2-related disorders.
- Nurr1 directly turns on Pitx3 expression
- This regulation happens through a specific DNA binding site
- The process is crucial for dopamine neuron development
- Disruption may contribute to NR4A2-related syndromes
- Suggests a potential pathway for future therapies
Orphan nuclear receptor Nur77 promotes acute kidney injury and renal epithelial apoptosis.
Balasubramanian S, Jansen M, Valerius MT, Humphreys BD, Strom TB
Nur77, a nuclear receptor, drives kidney cell death after injury and worsens acute kidney injury. Blocking Nur77 or using retinoic acid to suppress it protects kidney cells and improves function in mice.
- Nur77 triggers kidney cell death after injury
- Mice without Nur77 have less kidney damage
- Retinoic acid blocks Nur77 and protects kidneys
- Retinoic acid reduces inflammation and cell death
- This suggests a potential treatment for acute kidney injury
miR-132 regulates the differentiation of dopamine neurons by directly targeting Nurr1 expression.
Yang D, Li T, Wang Y, Tang Y, Cui H, Tang Y, Zhang X, Chen D, Shen N, Le W
miR-132 reduces the formation of dopamine neurons by suppressing Nurr1, a key gene involved in dopamine neuron development. Blocking miR-132 boosts the production of these neurons, suggesting a potential way to enhance dopamine neuron generation.
- miR-132 suppresses dopamine neuron formation
- miR-132 targets Nurr1, a critical gene for dopamine neurons
- Blocking miR-132 increases dopamine neuron production
- Nurr1 is directly regulated by miR-132 in stem cells
- This mechanism may inform therapies for dopamine-related disorders
Decreased NURR1 and PITX3 gene expression in Chinese patients with Parkinson's disease.
Liu H, Wei L, Tao Q, Deng H, Ming M, Xu P, Le W
People with Parkinson's disease in this study had lower levels of NURR1 and PITX3 genes in their blood cells, suggesting these genes may play a role in the disease. This finding could help explain why dopamine-producing brain cells degenerate in Parkinson's.
- NURR1 and PITX3 levels are lower in Parkinson's patients
- Low gene levels linked to higher Parkinson's risk in men and older people
- Blood cell changes may reflect broader biological issues in Parkinson's
- These genes are vital for dopamine neuron development and survival
Human cord blood-derived multipotent stem cells (CB-SCs) treated with all-trans-retinoic acid (ATRA) give rise to dopamine neurons.
Li X, Li H, Bi J, Chen Y, Jain S, Zhao Y
Treating human cord blood stem cells with all-trans-retinoic acid (ATRA) turns them into dopamine-producing neurons, which could offer a new way to treat Parkinson's disease by replacing lost brain cells.
- ATRA converts cord blood stem cells into dopamine neurons
- Over 45% of treated cells made dopamine-related proteins
- Treated cells released dopamine when stimulated
- No dopamine production in untreated control cells
- Potential for new stem cell therapy for Parkinson's
The nuclear orphan receptor Nur77 is a lipotoxicity sensor regulating glucose-induced insulin secretion in pancreatic β-cells.
Briand O, Helleboid-Chapman A, Ploton M, Hennuyer N, Carpentier R, Pattou F, Vandewalle B, Moerman E, Gmyr V, Kerr-Conte J, Eeckhoute J, Staels B, Lefebvre P
Nur77, a protein linked to NR4A2, acts as a sensor for fat toxicity in insulin-producing cells and disrupts insulin production and release by interfering with key regulatory proteins. This suggests that abnormal Nur77 activity may contribute to metabolic dysfunction in conditions involving insulin resistance or diabetes.
- Nur77 responds to fat buildup in insulin cells
- It disrupts insulin production by blocking gene activity
- Nur77 interferes with FoxO1, a critical insulin regulator
- This mechanism may worsen metabolic problems in diabetes
- NR4A2/Nur77 is a potential target for metabolic therapies
Nurr1 regulates Top IIβ and functions in axon genesis of mesencephalic dopaminergic neurons.
Heng X, Jin G, Zhang X, Yang D, Zhu M, Fu S, Li X, Le W
Nurr1 controls the activity of a gene called Top IIβ, which is essential for the development of dopamine-producing brain cells, particularly in forming their long connections. When Nurr1 is missing or dysfunctional, Top IIβ levels drop, leading to defective neuron wiring and loss of connections in brain pathways linked to movement control.
- Nurr1 regulates Top IIβ, a key gene for neuron wiring
- Low Top IIβ causes broken nerve connections in dopamine neurons
- Disrupted Nurr1-Top IIβ link may explain brain wiring issues in Parkinson’s
- Blocking Top IIβ mimics Nurr1 deficiency in lab models
- This pathway could be a target for future treatments
Nurr1 protein is required for N-methyl-D-aspartic acid (NMDA) receptor-mediated neuronal survival.
Barneda-Zahonero B, Servitja JM, Badiola N, Miñano-Molina AJ, Fadó R, Saura CA, Rodríguez-Alvarez J
Nurr1 is a key protein that helps brain cells survive when activated by NMDA receptors, which are important for brain development. It works by boosting levels of BDNF, a growth factor that protects neurons, and its activity depends on signals from another protein called CREB.
- Nurr1 is essential for NMDA receptor-mediated neuron survival
- Nurr1 increases BDNF, a critical brain growth factor
- Nurr1 is turned on by CREB after NMDA stimulation
- Blocking Nurr1 reduces neuron protection from NMDA
- Nurr1 and BDNF levels rise together during brain development
NR4A2: effects of an "orphan" receptor on sustained attention in a schizophrenic population.
Ancín I, Cabranes JA, Vázquez-Álvarez B, Santos JL, Sánchez-Morla E, Alaerts M, Del-Favero J, Barabash A
Variants in the NR4A2 gene are linked to attention problems in people with schizophrenia, especially in males. The gene affects how well individuals perform on attention tasks, influencing accuracy, reaction time, and sensitivity to stimuli.
- NR4A2 gene variants affect attention in schizophrenia
- Male patients with certain NR4A2 variants show worse attention performance
- Specific gene combinations (haplotypes) are tied to lower accuracy and slower responses
- NR4A2 influences dopamine-related proteins critical for attention
- Findings highlight NR4A2 as a potential target for improving attention deficits
NR4A nuclear receptors mediate carnitine palmitoyltransferase 1A gene expression by the rexinoid HX600.
Ishizawa M, Kagechika H, Makishima M
The drug HX600 activates NR4A2 (NURR1) and related proteins to turn on the CPT1A gene, which helps the body burn fat for energy. This effect was seen in human cells and depends on NR4A2 or Nur77, suggesting a direct link between these proteins and fat metabolism.
- HX600 turns on CPT1A via NR4A2/NURR1
- CPT1A helps burn fat for energy
- NR4A2 is essential for this gene activation
- Effect occurs without new protein synthesis
- Findings may help target metabolic issues in NR4A2 syndrome
Prenatal immune activation interacts with genetic Nurr1 deficiency in the development of attentional impairments.
Vuillermot S, Joodmardi E, Perlmann T, Ögren SO, Feldon J, Meyer U
Children with NR4A2-related syndrome may be more vulnerable to attention and behavior problems if they experience prenatal infections or immune activation, especially when combined with their genetic condition. The study shows that genetic Nurr1 deficiency and prenatal immune challenges together worsen dopamine system development and lead to lasting attention deficits.
- Prenatal immune activation worsens attention issues in genetically vulnerable mice
- NR4A2/Nurr1 gene problems and immune exposure together harm brain dopamine systems
- Combined genetic and environmental factors cause more severe deficits than either alone
- Findings relate directly to ADHD and schizophrenia-like symptoms
- Suggests early immune events may trigger or worsen symptoms in NR4A2 children
Nurr1 haplotypes are associated with femoropopliteal restenosis/re-occlusion after percutaneous transluminal angioplasty.
Božič-Mijovski M, Bedenčič M, Stegnar M, Salapura V, Ježovnik MK, Kozak M, Blinc A
Certain genetic variations in the NR4A2 (Nurr1) gene are linked to a higher chance of blood vessel narrowing after leg artery treatment, which may help predict who is at risk for this complication.
- Specific NR4A2 gene variants increase restenosis risk after leg artery treatment
- These variants were found in patients after successful angioplasty
- The findings may help identify high-risk patients early
- Could inform future personalized treatment strategies
CREB-regulated transcription coactivator 1-dependent transcription in Alzheimer's disease mice.
Saura CA
In mice with Alzheimer's-like symptoms, a key gene regulator called CRTC1 is impaired, leading to reduced expression of memory-related genes such as NR4A2. Restoring CRTC1 function or boosting calcium signaling can reverse these gene expression deficits.
- CRTC1 dysfunction disrupts memory-related gene expression in Alzheimer's mice
- NR4A2, a memory gene, is downregulated due to impaired CRTC1 activity
- Boosting calcium signals or CRTC1 can restore gene expression
- This pathway may be a target for treating memory loss in Alzheimer's
Clinical improvement of the aggressive neurobehavioral phenotype in a patient with a deletion of PITX3 and the absence of L-DOPA in the cerebrospinal fluid.
Derwińska K, Mierzewska H, Goszczańska A, Szczepanik E, Xia Z, Kuśmierska K, Tryfon J, Kutkowska-Kaźmierczak A, Bocian E, Mazurczak T, Obersztyn E, Stankiewicz P
A teenager with a rare genetic deletion involving the PITX3 gene showed severe behavioral issues and no L-DOPA in his spinal fluid, but his aggression and attention improved slightly after starting L-DOPA treatment, suggesting the drug may help some symptoms despite low dopamine levels.
- PITX3 deletion causes severe neurobehavioral problems
- No L-DOPA found in spinal fluid, indicating dopamine deficiency
- L-DOPA treatment led to mild improvement in aggression and focus
- This suggests L-DOPA may help some patients with similar genetic issues
- PITX3 is critical for dopamine neuron development
The function and mechanisms of Nurr1 action in midbrain dopaminergic neurons, from development and maintenance to survival.
Luo Y
Nurr1 is essential for the development, survival, and function of dopamine-producing brain cells. It regulates key genes like VIP and interacts with a protein called NuIP to maintain neuron health, which may offer targets for treating NR4A2-related disorders.
- Nurr1 is vital for dopamine neuron development and survival
- It controls genes like VIP and works with NuIP to support neuron function
- Nurr1 dysfunction leads to gradual loss of dopamine neurons
- These mechanisms may inform therapies for NR4A2-related conditions
Spontaneous Expression of Neurotrophic Factors and TH, Nurr1, Nestin Genes in Long-term Culture of Bone Marrow Mesenchymal Stem Cells.
Moradi F, Haji Ghasem Kashani M, Ghorbanian MT, Lashkarbolouki T
Long-term culture of rat bone marrow stem cells causes them to spontaneously turn into neural-like cells without added growth factors. These cells express key genes related to dopamine neurons, including Nurr1, tyrosine hydroxylase, and nestin.
- Stem cells turned into neural-like cells on their own
- Expressed Nurr1, a gene linked to NR4A2-related syndrome
- Produced proteins important for dopamine neuron development
- No added chemicals or growth factors needed
- May inform future cell-based therapies
The Transcription Factor NURR1 Exerts Concentration-Dependent Effects on Target Genes Mediating Distinct Biological Processes.
Johnson MM, Michelhaugh SK, Bouhamdan M, Schmidt CJ, Bannon MJ
NURR1 levels directly influence which genes are turned on or off in dopamine neurons, with different amounts of NURR1 controlling distinct biological processes. This suggests that therapies boosting NURR1 could help protect or restore dopamine neurons in NR4A2-related conditions.
- NURR1 levels control different genes and functions in dopamine neurons
- Low NURR1 is linked to Parkinson’s and other dopamine disorders
- Boosting NURR1 may protect or restore dopamine neurons
- Findings support NURR1 as a target for treating NR4A2-related syndromes
Reduction in inflammatory gene expression in skeletal muscle from Roux-en-Y gastric bypass patients randomized to omentectomy.
Tamboli RA, Hajri T, Jiang A, Marks-Shulman PA, Williams DB, Clements RH, Melvin W, Bowen BP, Shyr Y, Abumrad NN, Flynn CR
Roux-en-Y gastric bypass surgery reduces inflammation in skeletal muscle, and removing abdominal fat (omentectomy) makes this anti-inflammatory effect stronger. The study found significant decreases in multiple inflammation-related genes, including NR4A2, after surgery, especially with omentectomy.
- RYGB surgery reduces muscle inflammation
- Omentectomy enhances anti-inflammatory effects
- NR4A2 gene expression decreased post-surgery
- Inflammation genes like IL8 and CXCL2 dropped
- Muscle repair and gene regulation changed significantly
Neurobehavioral and transcriptional effects of acrylamide in juvenile rats.
Seale SM, Feng Q, Agarwal AK, El-Alfy AT
Acrylamide exposure in juvenile rats causes neurotoxic effects, including reduced motor function and altered gene expression in the nervous system. Notably, it reduces Nr4a2, a gene critical for dopamine neuron development, which is directly relevant to NR4A2-related syndrome.
- Acrylamide impairs motor function in young rats
- It reduces Nr4a2 expression in the cerebellum
- Nr4a2 is essential for dopamine neuron development
- This gene change may serve as a biomarker for neurotoxicity
- Findings highlight potential risks for neurodevelopmental disorders
Efficient conversion of astrocytes to functional midbrain dopaminergic neurons using a single polycistronic vector.
Addis RC, Hsu FC, Wright RL, Dichter MA, Coulter DA, Gearhart JD
Scientists turned astrocytes—common brain cells—into functional midbrain dopamine-producing neurons using a single gene delivery tool. These reprogrammed neurons behave like real dopamine neurons, firing rhythmically and releasing dopamine, which could help treat Parkinson’s disease or model brain disorders.
- Astrocytes were converted into dopamine neurons efficiently
- Reprogrammed neurons show key traits of midbrain dopamine cells
- Single gene vector made the process simpler and more reliable
- Potential for in vivo brain repair in Parkinson’s disease
- Findings support future therapies targeting dopamine loss
The nuclear receptors NUR77, NURR1 and NOR1 in obesity and during fat loss.
Veum VL, Dankel SN, Gjerde J, Nielsen HJ, Solsvik MH, Haugen C, Christensen BJ, Hoang T, Fadnes DJ, Busch C, Våge V, Sagen JV, Mellgren G
NR4A2 (NURR1) and related nuclear receptors are highly active in fat tissue of people with extreme obesity, but their levels drop after significant weight loss. These receptors may help regulate how fat tissue responds to stress and inflammation, suggesting they play a role in metabolic disease.
- NR4A2 is overactive in fat tissue of severely obese people
- Levels return to normal after major weight loss
- NR4A2 is more active in deep abdominal fat than in subcutaneous fat
- NR4A2 drops during fat cell development
- These receptors may influence inflammation and stress in fat tissue
The co-transduction of Nurr1 and Brn4 genes induces the differentiation of neural stem cells into dopaminergic neurons.
Tan XF, Jin GH, Tian ML, Qin JB, Zhang L, Zhu HX, Li HM
Forcing neural stem cells to produce both Nurr1 and Brn4 genes helps them become mature, functional dopamine-producing neurons, which could improve future cell therapies for Parkinson's disease.
- Nurr1 alone makes stem cells into dopamine neurons
- But these neurons stay immature and lack key features
- Adding Brn4 helps neurons mature and develop proper structure
- This combo could improve stem cell treatments for Parkinson's
- May lead to better cell replacement therapies in the future
Retinoic acid-dependent and -independent gene-regulatory pathways of Pitx3 in meso-diencephalic dopaminergic neurons.
Jacobs FM, Veenvliet JV, Almirza WH, Hoekstra EJ, von Oerthel L, van der Linden AJ, Neijts R, Koerkamp MG, van Leenen D, Holstege FC, Burbach JP, Smidt MP
Pitx3 helps control key genes in a specific group of dopamine neurons that are affected in NR4A2-related syndrome. Some of these genes depend on retinoic acid (RA) for proper development, while others are controlled directly by Pitx3 without needing RA. This shows that Pitx3 works through multiple pathways to shape the identity and function of these neurons.
- Pitx3 regulates genes critical for dopamine neuron development
- Some genes need retinoic acid (RA) to function properly
- Other genes are controlled directly by Pitx3, not by RA
- RA signaling is important for the survival and identity of SNc neurons
- Pitx3 acts through both RA-dependent and independent pathways
Long-term memory deficits in Huntington's disease are associated with reduced CBP histone acetylase activity.
Giralt A, Puigdellívol M, Carretón O, Paoletti P, Valero J, Parra-Damas A, Saura CA, Alberch J, Ginés S
This study shows that memory problems in Huntington's disease are linked to reduced activity of a key brain protein called CBP, which helps control memory-related genes. Boosting CBP function with a drug called trichostatin A improved memory and gene activity in a mouse model of Huntington's disease.
- Memory issues in Huntington's disease start early and are tied to low CBP activity
- Reduced CBP leads to lower levels of memory-related genes like NR4A2
- A drug that boosts CBP function reversed memory deficits in mice
- Targeting CBP may help treat memory problems in Huntington's disease