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Melin E, Andersson M, Gøtzsche CR, Wickham J, Huang Y, Szczygiel JA, Boender A, Christiansen SH, Pinborg L, Woldbye DPD, Kokaia M. Combinatorial gene therapy for epilepsy: Gene sequence positioning and AAV serotype influence expression and inhibitory effect on seizures. Gene Ther 2023; 30:649-658. [PMID: 37029201 PMCID: PMC10457185 DOI: 10.1038/s41434-023-00399-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 02/24/2023] [Accepted: 03/16/2023] [Indexed: 04/09/2023]
Abstract
Gene therapy with AAV vectors carrying genes for neuropeptide Y and its receptor Y2 has been shown to inhibit seizures in multiple animal models of epilepsy. It is however unknown how the AAV serotype or the sequence order of these two transgenes in the expression cassette affects the actual parenchymal gene expression levels and the seizure-suppressant efficacy. To address these questions, we compared three viral vector serotypes (AAV1, AAV2 and AAV8) and two transgene sequence orders (NPY-IRES-Y2 and Y2-IRES-NPY) in a rat model of acutely induced seizures. Wistar male rats were injected bilaterally with viral vectors and 3 weeks later acute seizures were induced by a subcutaneous injection of kainate. The latency until 1st motor seizure, time spent in motor seizure and latency to status epilepticus were measured to evaluate the seizure-suppressing efficacy of these vectors compared to an empty cassette control vector. Based on the results, the effect of the AAV1-NPY-IRES-Y2 vector was further investigated by in vitro electrophysiology, and its ability to achieve transgene overexpression in resected human hippocampal tissue was evaluated. The AAV1-NPY-IRES-Y2 proved to be better to any other serotype or gene sequence considering both transgene expression and ability to suppress induced seizures in rats. The vector also demonstrated transgene-induced decrease of glutamate release from excitatory neuron terminals and significantly increased both NPY and Y2 expression in resected human hippocampal tissue from patients with drug-resistant temporal lobe epilepsy. These results validate the feasibility of NPY/Y2 receptor gene therapy as a therapeutic opportunity in focal epilepsies.
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Affiliation(s)
- Esbjörn Melin
- Experimental Epilepsy Group, Epilepsy Centre, Lund University Hospital, 17 Sölvegatan, 221 84, Lund, Sweden.
| | - My Andersson
- Experimental Epilepsy Group, Epilepsy Centre, Lund University Hospital, 17 Sölvegatan, 221 84, Lund, Sweden
| | - Casper R Gøtzsche
- CombiGene AB, Medicon Village, 2 Scheelevägen, 223 81, Lund, Sweden
- Department of Neuroscience, Panum Institute, University of Copenhagen, 3B Blegdamsvej, DK-2200, Copenhagen N, Denmark
| | - Jenny Wickham
- Experimental Epilepsy Group, Epilepsy Centre, Lund University Hospital, 17 Sölvegatan, 221 84, Lund, Sweden
| | - Yuzhe Huang
- Department of Neuroscience, Panum Institute, University of Copenhagen, 3B Blegdamsvej, DK-2200, Copenhagen N, Denmark
| | - Julia Alicja Szczygiel
- Department of Neuroscience, Panum Institute, University of Copenhagen, 3B Blegdamsvej, DK-2200, Copenhagen N, Denmark
| | - Arnie Boender
- Experimental Epilepsy Group, Epilepsy Centre, Lund University Hospital, 17 Sölvegatan, 221 84, Lund, Sweden
| | - Søren H Christiansen
- Department of Neuroscience, Panum Institute, University of Copenhagen, 3B Blegdamsvej, DK-2200, Copenhagen N, Denmark
| | - Lars Pinborg
- Department of Neurology and Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, 9 Blegdamsvej, DK-2100, Copenhagen, Denmark
| | - David P D Woldbye
- Department of Neuroscience, Panum Institute, University of Copenhagen, 3B Blegdamsvej, DK-2200, Copenhagen N, Denmark
| | - Merab Kokaia
- Experimental Epilepsy Group, Epilepsy Centre, Lund University Hospital, 17 Sölvegatan, 221 84, Lund, Sweden
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Mikkelsen JD, Aripaka SS, Kaad S, Pazarlar BA, Pinborg L, Finsen B, Varrone A, Bang-Andersen B, Bastlund JF. Characterization of the Novel P2X7 Receptor Radioligand [ 3H]JNJ-64413739 in Human Brain Tissue. ACS Chem Neurosci 2022; 14:111-118. [PMID: 36535632 PMCID: PMC9817075 DOI: 10.1021/acschemneuro.2c00561] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Radioligands targeting microglia cells have been developed to identify and determine neuroinflammation in the living brain. One recently discovered ligand is JNJ-64413739 that binds selectively to the purinergic receptor P2X7R. The expression of P2X7R is increased under inflammation; hence, the ligand is considered useful in the detection of neuroinflammation in the brain. [18F]JNJ-64413739 has been evaluated in healthy subjects with positron emission tomography; however, the in vitro binding properties of the ligand in human brain tissue have not been investigated. Therefore, the purpose of this study was to measure Bmax and Kd of [3H]JNJ-64413739 using autoradiography on human cortical tissue sections resected from a total of 48 patients with treatment-resistant epilepsy. Correlations between the specific binding of [3H]JNJ-64413739 with age, sex, and duration of disease were explored. Finally, to examine the relationship between P2X7R and TSPO availability, specific binding of [3H]JNJ-64413739 and [123I]CLINDE was examined in the same tissue. The binding was measured in both cortical gray and subcortical white matter. Saturation revealed a Kd (5 nM) value similar between gray and white matter but a larger Bmax in the white than in the gray matter. The binding was completely displaced by the cold ligand and structurally different P2X7R ligands. The variability in saturable binding among the samples was found to be 38% in gray and white matter but was not correlated to either age, sex, or the duration of the disease. Interestingly, there was no significant correlation between [3H]JNJ-64413739 and [123I]CLINDE binding. These data demonstrate that [3H]JNJ-64413739 is a suitable radioligand for evaluating the distribution and expression of the P2X7R in the human brain.
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Affiliation(s)
- Jens D. Mikkelsen
- Neurobiology
Research Unit, University Hospital Rigshospitalet, Copenhagen 2100, Denmark,Institute
of Neuroscience, University of Copenhagen, Copenhagen 2200, Denmark,Department
of Molecular Medicine, University of Southern
Denmark, Odense 5000, Denmark,. Tel.: +45 3545 6701
| | - Sanjay S. Aripaka
- Neurobiology
Research Unit, University Hospital Rigshospitalet, Copenhagen 2100, Denmark
| | - Sif Kaad
- Neurobiology
Research Unit, University Hospital Rigshospitalet, Copenhagen 2100, Denmark
| | - Burcu A. Pazarlar
- Neurobiology
Research Unit, University Hospital Rigshospitalet, Copenhagen 2100, Denmark,Physiology
Department, Faculty of Medicine, Izmir Katip
Celebi University, Izmir 35330, Turkey
| | - Lars Pinborg
- Neurobiology
Research Unit, University Hospital Rigshospitalet, Copenhagen 2100, Denmark,Epilepsy
Clinic, Department of Neurology, Copenhagen
University Hospital, Rigshospitalet, Copenhagen 2100, Denmark
| | - Bente Finsen
- Department
of Molecular Medicine, University of Southern
Denmark, Odense 5000, Denmark
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Willumsen A, Midtgaard J, Jespersen B, Hansen CKK, Lam SN, Hansen S, Kupers R, Fabricius ME, Litman M, Pinborg L, Tascón-Vidarte JD, Sabers A, Roland PE. Local networks from different parts of the human cerebral cortex generate and share the same population dynamic. Cereb Cortex Commun 2022; 3:tgac040. [PMID: 36530950 PMCID: PMC9753090 DOI: 10.1093/texcom/tgac040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 10/05/2022] [Accepted: 10/10/2022] [Indexed: 11/07/2022] Open
Abstract
A major goal of neuroscience is to reveal mechanisms supporting collaborative actions of neurons in local and larger-scale networks. However, no clear overall principle of operation has emerged despite decades-long experimental efforts. Here, we used an unbiased method to extract and identify the dynamics of local postsynaptic network states contained in the cortical field potential. Field potentials were recorded by depth electrodes targeting a wide selection of cortical regions during spontaneous activities, and sensory, motor, and cognitive experimental tasks. Despite different architectures and different activities, all local cortical networks generated the same type of dynamic confined to one region only of state space. Surprisingly, within this region, state trajectories expanded and contracted continuously during all brain activities and generated a single expansion followed by a contraction in a single trial. This behavior deviates from known attractors and attractor networks. The state-space contractions of particular subsets of brain regions cross-correlated during perceptive, motor, and cognitive tasks. Our results imply that the cortex does not need to change its dynamic to shift between different activities, making task-switching inherent in the dynamic of collective cortical operations. Our results provide a mathematically described general explanation of local and larger scale cortical dynamic.
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Affiliation(s)
- Alex Willumsen
- Department of Neuroscience, Panum Institute, University of Copenhagen, Denmark
| | - Jens Midtgaard
- Department of Neuroscience, Panum Institute, University of Copenhagen, Denmark
| | - Bo Jespersen
- Department of Neurosurgery, Rigshospitalet, University Hospital of Copenhagen, Denmark
| | | | - Salina N Lam
- Department of Neuroscience, Panum Institute, University of Copenhagen, Denmark
| | - Sabine Hansen
- Department of Neuroscience, Panum Institute, University of Copenhagen, Denmark
| | - Ron Kupers
- Department of Neuroscience, Panum Institute, University of Copenhagen, Denmark,Department of Neurosurgery, Rigshospitalet, University Hospital of Copenhagen, Denmark
| | - Martin E Fabricius
- Department of Clinical Neurophysiology, Rigshospitalet, University Hospital of Copenhagen, Denmark
| | - Minna Litman
- Epilepsy Clinic, Department of Neurology, Rigshospitalet, University Hospital of Copenhagen, Denmark
| | - Lars Pinborg
- Epilepsy Clinic, Department of Neurology, Rigshospitalet, University Hospital of Copenhagen, Denmark,Neurobiology Research Unit, Department of Neurology, Rigshospitalet, University Hospital of Copenhagen, Denmark
| | | | - Anne Sabers
- Epilepsy Clinic, Department of Neurology, Rigshospitalet, University Hospital of Copenhagen, Denmark
| | - Per E Roland
- Corresponding author: Per E. Roland, Department of Neuroscience, Panum Institute, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark.
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Pazarlar BA, Aripaka SS, Petukhov V, Pinborg L, Khodosevich K, Mikkelsen JD. Expression profile of synaptic vesicle glycoprotein 2A, B, and C paralogues in temporal neocortex tissue from patients with temporal lobe epilepsy (TLE). Mol Brain 2022; 15:45. [PMID: 35578248 PMCID: PMC9109314 DOI: 10.1186/s13041-022-00931-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Accepted: 05/05/2022] [Indexed: 11/10/2022] Open
Abstract
AbstractSynaptic vesicle glycoprotein-2 (SV2) is a family of proteins consisting of SV2A, SV2B, and SV2C. This protein family has attracted attention in recent years after SV2A was shown to be an epileptic drug target and a perhaps a biomarker of synaptic density. So far, the anatomical localization of these proteins in the rodent and human brain have been reported, but co-expression of SV2 genes on a cellular level, their expressions in the human brain, comparison to radioligand binding, any possible regulation in epilepsy are not known. We have here analyzed the expression of SV2 genes in neuronal subtypes in the temporal neocortex in selected specimens by using single nucleus-RNA sequencing, and performed quantitative PCR in populations of temporal lobe epilepsy (TLE) patients and healthy controls. [3H]-UCB-J autoradiography was performed to analyze the correlation between the mRNA transcript and binding capacity to SV2A. Our data showed that the SV2A transcript is expressed in all glutamatergic and GABAergic cortical subtypes, while SV2B expression is restricted to only the glutamatergic neurons and SV2C has very limited expression in a small subgroup of GABAergic interneurons. The level of [3H]-UCB-J binding and the concentration of SV2A mRNA is strongly correlated in each patient, and the expression is lower in the TLE patients. There is no relationship between SV2A expression and age, sex, seizure frequency, duration of epilepsy, or whether patients were recently treated with levetiracetam or not. Collectively, these findings point out a neuronal subtype-specific distribution of the expression of the three SV2 genes, and the lower levels of both radioligand binding and expression further emphasize the significance of these proteins in this disease.
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Wagstyl K, Whitaker K, Raznahan A, Seidlitz J, Vértes PE, Foldes S, Humphreys Z, Hu W, Mo J, Likeman M, Davies S, Lenge M, Cohen NT, Tang Y, Wang S, Ripart M, Chari A, Tisdall M, Bargallo N, Conde‐Blanco E, Pariente JC, Pascual‐Diaz S, Delgado‐Martínez I, Pérez‐Enríquez C, Lagorio I, Abela E, Mullatti N, O'Muircheartaigh J, Vecchiato K, Liu Y, Caligiuri M, Sinclair B, Vivash L, Willard A, Kandasamy J, McLellan A, Sokol D, Semmelroch M, Kloster A, Opheim G, Yasuda C, Zhang K, Hamandi K, Barba C, Guerrini R, Gaillard WD, You X, Wang I, González‐Ortiz S, Severino M, Striano P, Tortora D, Kalviainen R, Gambardella A, Labate A, Desmond P, Lui E, O'Brien T, Shetty J, Jackson G, Duncan JS, Winston GP, Pinborg L, Cendes F, Cross JH, Baldeweg T, Adler S. Atlas of lesion locations and postsurgical seizure freedom in focal cortical dysplasia: A MELD study. Epilepsia 2022; 63:61-74. [PMID: 34845719 PMCID: PMC8916105 DOI: 10.1111/epi.17130] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/07/2021] [Accepted: 11/08/2021] [Indexed: 02/05/2023]
Abstract
OBJECTIVE Drug-resistant focal epilepsy is often caused by focal cortical dysplasias (FCDs). The distribution of these lesions across the cerebral cortex and the impact of lesion location on clinical presentation and surgical outcome are largely unknown. We created a neuroimaging cohort of patients with individually mapped FCDs to determine factors associated with lesion location and predictors of postsurgical outcome. METHODS The MELD (Multi-centre Epilepsy Lesion Detection) project collated a retrospective cohort of 580 patients with epilepsy attributed to FCD from 20 epilepsy centers worldwide. Magnetic resonance imaging-based maps of individual FCDs with accompanying demographic, clinical, and surgical information were collected. We mapped the distribution of FCDs, examined for associations between clinical factors and lesion location, and developed a predictive model of postsurgical seizure freedom. RESULTS FCDs were nonuniformly distributed, concentrating in the superior frontal sulcus, frontal pole, and temporal pole. Epilepsy onset was typically before the age of 10 years. Earlier epilepsy onset was associated with lesions in primary sensory areas, whereas later epilepsy onset was associated with lesions in association cortices. Lesions in temporal and occipital lobes tended to be larger than frontal lobe lesions. Seizure freedom rates varied with FCD location, from around 30% in visual, motor, and premotor areas to 75% in superior temporal and frontal gyri. The predictive model of postsurgical seizure freedom had a positive predictive value of 70% and negative predictive value of 61%. SIGNIFICANCE FCD location is an important determinant of its size, the age at epilepsy onset, and the likelihood of seizure freedom postsurgery. Our atlas of lesion locations can be used to guide the radiological search for subtle lesions in individual patients. Our atlas of regional seizure freedom rates and associated predictive model can be used to estimate individual likelihoods of postsurgical seizure freedom. Data-driven atlases and predictive models are essential for evidence-based, precision medicine and risk counseling in epilepsy.
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Nissen K, Klem L, Jeppesen R, Axelsen TM, Christiansen SH, Gøtzsche CR, Pinborg L, Jespersen B, Klemp K, Woldbye D. [Gene therapy for central nervous system disorders]. Ugeskr Laeger 2020; 182:V09190535. [PMID: 32052730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In recent years, gene therapy has resurged as a potential treatment for an increasing number of medical diseases including those affecting the central nervous system (CNS), which is discussed in this review. Clinical trials have revealed promising results particularly in gene therapy for Parkinson's disease with upregulation of dopamine synthesis or downregulation of huntingtin synthesis in Huntington's disease. Gene therapy for spinal motor atrophy has received FDA approval this year. The biggest success is seen in ophthalmology, where gene therapy has been FDA/EU-approved for retinitis pigmentosa, sparking further hope of use for other CNS diseases in a near future.
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Wulff S, Nielsen MØ, Rostrup E, Svarer C, Jensen LT, Pinborg L, Glenthøj BY. The relation between dopamine D 2 receptor blockade and the brain reward system: a longitudinal study of first-episode schizophrenia patients. Psychol Med 2020; 50:220-228. [PMID: 30642415 DOI: 10.1017/s0033291718004099] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Psychotic symptoms have been linked to salience abnormalities in the brain reward system, perhaps caused by a dysfunction of the dopamine neurotransmission in striatal regions. Blocking dopamine D2 receptors dampens psychotic symptoms and normalises reward disturbances, but a direct relationship between D2 receptor blockade, normalisation of reward processing and symptom improvement has not yet been demonstrated. The current study examined the association between blockade of D2 receptors in the caudate nucleus, alterations in reward processing and the psychopathology in a longitudinal study of antipsychotic-naïve first-episode schizophrenia patients. METHODS Twenty-two antipsychotic-naïve first-episode schizophrenia patients (10 males, mean age 23.3) and 23 healthy controls (12 males, mean age 23.5) were examined with single-photon emission computed tomography using 123I-labelled iodobenzamide. Reward disturbances were measured with functional magnetic resonance imaging (fMRI) using a modified version of the monetary-incentive-delay task. Patients were assessed before and after 6 weeks of treatment with amisulpride. RESULTS In line with previous results, patients had a lower fMRI response at baseline (0.2 ± 0.5 v. 0.7 ± 0.6; p = 0.008), but not at follow-up (0.5 ± 0.6 v. 0.6 ± 0.7), and a change in the fMRI signal correlated with improvement in Positive and Negative Syndrome Scale positive symptoms (ρ = -0.435, p = 0.049). In patients responding to treatment, a correlation between improvement in the fMRI signal and receptor occupancy was found (ρ = 0.588; p = 0.035). CONCLUSION The results indicate that salience abnormalities play a role in the reward system in schizophrenia. In patients responding to a treatment-induced blockade of dopamine D2 receptors, the psychotic symptoms may be ameliorated by normalising salience abnormalities in the reward system.
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Affiliation(s)
- Sanne Wulff
- Center for Neuropsychiatric Schizophrenia Research and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, Mental Health Centre Glostrup, University of Copenhagen, Glostrup, Denmark
| | - Mette Ødegaard Nielsen
- Center for Neuropsychiatric Schizophrenia Research and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, Mental Health Centre Glostrup, University of Copenhagen, Glostrup, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, København, Denmark
| | - Egill Rostrup
- Center for Neuropsychiatric Schizophrenia Research and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, Mental Health Centre Glostrup, University of Copenhagen, Glostrup, Denmark
- Department of Clinical Physiology, Functional Imaging Unit, Nuclear Medicine and PET, Rigshospitalet Glostrup, University of Copenhagen, København, Denmark
| | - Claus Svarer
- Neurobiology Research Unit, Rigshospitalet, University of Copenhagen, København, Denmark
| | - Lars Thorbjørn Jensen
- Department of Clinical Physiology and Nuclear Medicine, Herlev Hospital, University of Copenhagen, Herlev, Denmark
| | - Lars Pinborg
- Neurobiology Research Unit, Rigshospitalet, University of Copenhagen, København, Denmark
| | - Birte Yding Glenthøj
- Center for Neuropsychiatric Schizophrenia Research and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, Mental Health Centre Glostrup, University of Copenhagen, Glostrup, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, København, Denmark
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Duez L, Tankisi H, Hansen PO, Sabers A, Pinborg L, Fabricius M, Rásonyi G, Rubboli G, Pedersen B, Leffers AM, Uldall P, Jespersen B, Brennum DMSJ, Henriksen OM, Fuglsang-Frederiksen A, Beniczky S. P08-S Combined electromagnetic source imaging in presurgical evaluation. Clin Neurophysiol 2019. [DOI: 10.1016/j.clinph.2019.04.548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Erritzoe D, Rasmussen H, Kristiansen KT, Frokjaer VG, Haugbol S, Pinborg L, Baaré W, Svarer C, Madsen J, Lublin H, Knudsen GM, Glenthoj BY. Cortical and subcortical 5-HT2A receptor binding in neuroleptic-naive first-episode schizophrenic patients. Neuropsychopharmacology 2008; 33:2435-41. [PMID: 18288096 DOI: 10.1038/sj.npp.1301656] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The serotonin 5-HT(2A) receptor is suspected to be involved in a number of psychiatric disorders, including schizophrenia. In particular, atypical antipsychotics have antagonistic effects on the 5-HT(2A) receptors, supporting a specific role of the 5-HT(2A) receptor in the pathophysiology of this disease. The aim of this study is to investigate cortical and subcortical 5-HT(2A) binding in neuroleptic-naive schizophrenic patients. Fifteen neuroleptic-naive patients diagnosed with schizophrenia (age 27.5+/-4.5 years), 11 men and 4 women, and 15 healthy control subjects matched for age (28.5+/-5.7 years) and gender underwent a 40 min positron emission tomography (PET) study using the 5-HT(2A) antagonist, [(18)F]altanserin, as a radioligand. PET images were co-registered to 3 T magnetic resonance images (MRIs) for each individual subject, and ROIs were applied automatically onto the individual MRIs and PET images. The cerebellum was used as a reference region. The binding potential of specific tracer binding (BP(p)) was used as the outcome measure. No significant difference was seen in cortical receptor distribution between patients and controls. An increase in 5-HT(2A) receptor binding in the caudate nucleus was detected in the group of schizophrenic patients (0.7+/-0.1) when compared to the healthy controls (0.5+/-0.3) (p=0.02). Our results confirm other in vivo findings of no difference in cortical 5-HT(2A) receptor binding between first-episode antipsychotic-naive schizophrenic patients and age- and gender-matched healthy control subjects. However, a preliminary finding of increased 5-HT(2A) binding in the caudate nucleus requires further investigation to explore the relation of subcortical and cortical 5-HT(2A) receptor binding.
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Affiliation(s)
- David Erritzoe
- Neurobiology Research Unit, Center for Integrated Molecular Brain Imaging, University Hospital Rigshospitalet, Copenhagen, Denmark.
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Hasselbalch SG, Madsen K, Svarer C, Pinborg L, Stokholm J, Holm S, Paulson OB, Waldemar G, Knudsen GM. P2–253: Serotonin receptor binding in mild cognitive impairment studied by PET and [18f]–altanserin. Alzheimers Dement 2006. [DOI: 10.1016/j.jalz.2006.05.1092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Steen G. Hasselbalch
- Memory Disorders Research Unit 6702CopenhagenDenmark
- Neurobiology Research Unit, RigshospitaletCopenhagenDenmark
| | - Karine Madsen
- Neurobiology Research Unit, RigshospitaletCopenhagenDenmark
| | - Claus Svarer
- Neurobiology Research Unit, RigshospitaletCopenhagenDenmark
| | - Lars Pinborg
- Neurobiology Research Unit, RigshospitaletCopenhagenDenmark
| | | | | | - Olaf B. Paulson
- Danish Research Center for Magnetic Resonance, Hvidovre HospitalCopenhagenDenmark
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Erritzoe D, Frokjaer V, Arfan H, Haugbol S, Pinborg L, Svarer C, Madsen J, Paulson O, Knudsen G. Positive correlation between body mass index and in vivo serotonin 2A receptor binding in healthy humans. Neuroimage 2006. [DOI: 10.1016/j.neuroimage.2006.04.147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Rasmussen H, Mackeprang T, Svarer C, Baaré W, Pinborg L, Friberg L, Hemmingsen R, Videbaek C, Glenthoj B. Frontal dopamine D2 receptor binding in neuroleptic-naive first-episode schizophrenic patients correlates with positive psychotic symptoms and gender. Neuroimage 2006. [DOI: 10.1016/j.neuroimage.2006.04.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Hasselbalch SG, Madsen K, Svarer C, Pinborg L, Stokholm J, Holm S, Paulson O, Waldemar G, Knudsen G. 5-HT2A receptor binding in mild cognitive impairment: Correlation with cognitive and neuropsychiatric symptoms. Neuroimage 2006. [DOI: 10.1016/j.neuroimage.2006.04.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Hasselbalch SG, Madsen K, Svarer C, Pinborg L, Holm S, Stokholm J, Waldemar G, Paulson OB, Knudsen GM. P3-080 Automatic extraction of quantitative volume of interest (VOI) values from functional brain scans in neurodegenerative diseases. Neurobiol Aging 2004. [DOI: 10.1016/s0197-4580(04)81232-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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