1
|
Girmaw F. Review on allosteric modulators of dopamine receptors so far. Health Sci Rep 2024; 7:e1984. [PMID: 38505681 PMCID: PMC10948587 DOI: 10.1002/hsr2.1984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 02/29/2024] [Accepted: 03/03/2024] [Indexed: 03/21/2024] Open
Abstract
Background Contemporary research is predominantly directed towards allosteric modulators, a class of compounds designed to interact with specific sites distinct from the orthosteric site on G protein-coupled receptors. These allosteric modulators play a pivotal role in influencing diverse pharmacological effects, such as agonism/inverse agonism, efficacy modulation, and affinity modulation. One particularly intriguing aspect is the demonstrated capacity of allosteric modulation to enhance drug selectivity for therapeutic purposes, potentially leading to a reduction in serious side effects associated with traditional approaches. Allosteric ligands, a majority of which fall into the categories of negative allosteric modulators or positive allosteric modulators, exhibit the unique ability to either diminish or enhance the effects of endogenous ligands. Negative allosteric modulators weaken the response, while positive allosteric modulators intensify it. Additionally, silent allosteric modulators represent a distinct class that neither activates nor blocks the effects of endogenous ligands, adding complexity to the spectrum of allosteric modulation. In the broader context of central nervous system disorders, allosteric modulation takes center stage, particularly in the realm of dopamine receptors specifically, D1, D2, and D3 receptors. These receptors hold immense therapeutic potential for a range of conditions spanning neurodegenerative disorders to neurobehavioral and psychiatric disorders. The intricate modulation of dopamine receptors through allosteric mechanisms offers a nuanced and versatile approach to drug development. As research endeavors continue to unfold, the exploration of allosteric modulation stands as a promising frontier, holding the potential to reshape the landscape of drug discovery and therapeutic interventions in the field of neurology and psychiatry.
Collapse
Affiliation(s)
- Fentaw Girmaw
- Department of Pharmacy, College of Health ScienceWoldia UniversityWoldiaEthiopia
| |
Collapse
|
2
|
Wang J, Bi Q, Gong W, Zhang H, Deng M, Chen L, Wang B. Histogram analysis of diffusion kurtosis imaging of deep brain nuclei in Parkinson's disease with different motor subtypes. Clin Radiol 2023; 78:e966-e974. [PMID: 37838544 DOI: 10.1016/j.crad.2023.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 09/12/2023] [Accepted: 09/13/2023] [Indexed: 10/16/2023]
Abstract
AIM To evaluate the diagnostic and differential efficacy of diffusion kurtosis imaging (DKI) histogram analysis for different motor subtypes of Parkinson's disease (PD). MATERIALS AND METHODS Seventy PD patients including 40 with postural instability and gait disorder (PIGD) and 30 with tremor-dominant (TD) and 36 healthy controls (HC) were enrolled prospectively and underwent MRI examinations. The regions of interest (ROI) in the deep brain nuclei were delineated and features were extracted on the map of mean kurtosis (MK), axial kurtosis (Ka), and radial kurtosis (Kr), respectively. The differences in histogram features between PD patients and HC and between patients with PIGD and TD were compared. The areas under the curve (AUCs) were calculated to evaluate the diagnostic efficacy of all histogram features. The correlations between histogram features and clinical indicators were evaluated. RESULTS Some DKI histogram features were significantly different between PD patients and HC, and also different between patients with PIGD and TD (all p<0.05). MK of the substantia nigra pars reticulate (SNprkurtosis), Ka of the substantia nigra pars compacta (SNpc) 50 percentile (SNpcP50), and Kr of SNpc 90th percentile showed the highest AUC for distinguishing patients with PIGD from HC. MK-SNpc 10th percentile, Ka-SNpc 25th percentile, and Kr of the head of the caudate nucleus (CN) 90th percentile had the highest AUC for distinguishing patients with TD from HC. MK of the putamen 10th percentile combined with Ka of the bilateral red nucleus RNkurtosis yielded the highest diagnostic performance with an AUC of 0.762 for distinguishing patients with PIGD from TD. Certain DKI histogram features were correlated with Hoehn-Yahr (H&Y) stage, Mini Mental State Examination (MMSE) score, tremor score, and PIGD score (all p<0.05). CONCLUSION DKI histogram analysis was useful to diagnose and discriminate different motor subtypes of PD. Certain DKI histogram features correlated with clinical indicators.
Collapse
Affiliation(s)
- J Wang
- Department of Medical Imaging, Southern Central Hospital of Yunnan Province (The First People's Hospital of Honghe State), Mengzi, Yunan, China
| | - Q Bi
- Department of MRI, The First People's Hospital of Yunnan Province, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - W Gong
- Department of Anesthesiology, Southern Central Hospital of Yunnan Province (The First People's Hospital of Honghe State), Mengzi, Yunan, China
| | - H Zhang
- Department of MRI, The First People's Hospital of Yunnan Province, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - M Deng
- Department of Medical Imaging, Southern Central Hospital of Yunnan Province (The First People's Hospital of Honghe State), Mengzi, Yunan, China
| | - L Chen
- Department of MRI, The First People's Hospital of Yunnan Province, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - B Wang
- Department of MRI, The First People's Hospital of Yunnan Province, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China.
| |
Collapse
|
3
|
Chen L, Sun J, Gao L, Wang J, Ma J, Xu E, Zhang D, Li L, Wu T. Dysconnectivity of the parafascicular nucleus in Parkinson's disease: A dynamic causal modeling analysis. Neurobiol Dis 2023; 188:106335. [PMID: 37890560 DOI: 10.1016/j.nbd.2023.106335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 10/24/2023] [Accepted: 10/24/2023] [Indexed: 10/29/2023] Open
Abstract
BACKGROUND Recent animal model studies have suggested that the parafascicular nucleus has the potential to be an effective deep brain stimulation target for Parkinson's disease. However, our knowledge on the role of the parafascicular nucleus in Parkinson's disease patients remains limited. OBJECTIVE We aimed to investigate the functional alterations of the parafascicular nucleus projections in Parkinson's disease patients. METHODS We enrolled 72 Parkinson's disease patients and 60 healthy controls, then utilized resting-state functional MRI and spectral dynamic causal modeling to explore the effective connectivity of the bilateral parafascicular nucleus to the dorsal putamen, nucleus accumbens, and subthalamic nucleus. The associations between the effective connectivity of the parafascicular nucleus projections and clinical features were measured with Pearson partial correlations. RESULTS Compared with controls, the effective connectivity from the parafascicular nucleus to dorsal putamen was significantly increased, while the connectivity to the nucleus accumbens and subthalamic nucleus was significantly reduced in Parkinson's disease patients. There was a significantly positive correlation between the connectivity of parafascicular nucleus-dorsal putamen projection and motor deficits. The connectivity from the parafascicular nucleus to the subthalamic nucleus was negatively correlated with motor deficits and apathy, while the connectivity from the parafascicular nucleus to the nucleus accumbens was negatively associated with depression. CONCLUSION The present study demonstrates that the parafascicular nucleus-related projections are damaged and associated with clinical symptoms of Parkinson's disease. Our findings provide new insights into the impaired basal ganglia-thalamocortical circuits and give support for the parafascicular nucleus as a potential effective neuromodulating target of the disease.
Collapse
Affiliation(s)
- Lili Chen
- Center for Movement Disorders, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Junyan Sun
- Center for Movement Disorders, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Linlin Gao
- Department of General Medicine, Tianjin Union Medical Center, Tianjin, China
| | - Junling Wang
- Center for Movement Disorders, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Jinghong Ma
- Department of Neurobiology, Beijing Institute of Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Erhe Xu
- Department of Neurobiology, Beijing Institute of Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Dongling Zhang
- Center for Movement Disorders, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Liang Li
- Brain Science Center, Beijing Institute of Basic Medical Sciences, China.
| | - Tao Wu
- Center for Movement Disorders, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing, China.
| |
Collapse
|
4
|
Jenner P, Falup-Pecurariu C, Leta V, Verin M, Auffret M, Bhidayasiri R, Weiss D, Borovečki F, Jost WH. Adopting the Rumsfeld approach to understanding the action of levodopa and apomorphine in Parkinson's disease. J Neural Transm (Vienna) 2023; 130:1337-1347. [PMID: 37210460 PMCID: PMC10645644 DOI: 10.1007/s00702-023-02655-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 05/14/2023] [Indexed: 05/22/2023]
Abstract
Dopaminergic therapies dominate the treatment of the motor and non-motor symptoms of Parkinson's disease (PD) but there have been no major advances in therapy in many decades. Two of the oldest drugs used appear more effective than others-levodopa and apomorphine-but the reasons for this are seldom discussed and this may be one cause for a lack of progress. This short review questions current thinking on drug action and looks at whether adopting the philosophy of ex-US Secretary of State Donald Rumsfeld reveals 'unknown' aspects of the actions of levodopa and apomorphine that provide clues for a way forward. It appears that both levodopa and apomorphine have a more complex pharmacology than classical views would suggest. In addition, there are unexpected facets to the mechanisms through which levodopa acts that are either forgotten as 'known unknowns' or ignored as 'unknown unknowns'. The conclusion reached is that we may not know as much as we think about drug action in PD and there is a case for looking beyond the obvious.
Collapse
Affiliation(s)
- P Jenner
- Faculty of Life Sciences and Medicine, Institute of Pharmaceutical Sciences, King's College London, London, SE1 1UL, UK.
| | - C Falup-Pecurariu
- Department of Neurology, Transylvania University, 500036, Brasov, Romania
| | - V Leta
- Parkinson's Foundation Center of Excellence at King's College Hospital; Department of Basic and Clinical Neuroscience, The Maurice Wohl Clinical Neuroscience Institute, King's College London and National Institute for Health Research (NIHR) Mental Health Biomedical Research Centre, Institute of Psychology, Psychiatry and Neurosciences, King's College London, London, UK
| | - M Verin
- Institut des Neurosciences Cliniques de Rennes (INCR); Behavior and Basal Ganglia Research Unit, CIC-IT, CIC1414, Pontchaillou University Hospital and University of Rennes, Rennes, France
| | - M Auffret
- Institut des Neurosciences Cliniques de Rennes (INCR); Behavior and Basal Ganglia Research Unit, CIC-IT, CIC1414, Pontchaillou University Hospital and University of Rennes, Rennes, France
- France Développement Electronique (FDE), Monswiller, France
| | - Roongroj Bhidayasiri
- Department of Medicine, Faculty of Medicine, Chulalongkorn Centre of Excellence for Parkinson's Disease and Related Disorders, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, 10330, Thailand
- The Academy of Science, The Royal Society of Thailand, Bangkok, 10330, Thailand
| | - D Weiss
- Department for Neurodegenerative Diseases, Centre for Neurology, Hertie-Institute for Clinical Brain Research, Hoppe-Seyler-Str. 3, 72076, Tübingen, Germany
| | - F Borovečki
- Division for Neurodegenerative Diseases and Neurogenomics, Department of Neurology, University Hospital Centre Zagreb, 10000, Zagreb, Croatia
| | - W H Jost
- Parkinson-Klinik Ortenau, Kreuzbergstr. 12-16, 77709, Wolfach, Germany
| |
Collapse
|
5
|
Méndez JC, Perry BAL, Premereur E, Pelekanos V, Ramadan T, Mitchell AS. Variable cardiac responses in rhesus macaque monkeys after discrete mediodorsal thalamus manipulations. Sci Rep 2023; 13:16913. [PMID: 37805650 PMCID: PMC10560229 DOI: 10.1038/s41598-023-42752-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Accepted: 09/14/2023] [Indexed: 10/09/2023] Open
Abstract
The control of some physiological parameters, such as the heart rate, is known to have a role in cognitive and emotional processes. Cardiac changes are also linked to mental health issues and neurodegeneration. Thus, it is not surprising that many of the brain structures typically associated with cognition and emotion also comprise a circuit-the central automatic network-responsible for the modulation of cardiovascular output. The mediodorsal thalamus (MD) is involved in higher cognitive processes and is also known to be connected to some of the key neural structures that regulate cardiovascular function. However, it is unclear whether the MD has any role in this circuitry. Here, we show that discrete manipulations (microstimulation during anaesthetized functional neuroimaging or localized cytotoxin infusions) to either the magnocellular or the parvocellular MD subdivisions led to observable and variable changes in the heart rate of female and male rhesus macaque monkeys. Considering the central positions that these two MD subdivisions have in frontal cortico-thalamocortical circuits, our findings suggest that MD contributions to autonomic regulation may interact with its identified role in higher cognitive processes, representing an important physiological link between cognition and emotion.
Collapse
Affiliation(s)
- Juan Carlos Méndez
- Department of Clinical and Biomedical Sciences, University of Exeter, College House, St Luke's Campus, Heavitree Road, Exeter, EX1 2LU, UK
| | - Brook A L Perry
- Medical Research Council Brain Network Dynamics Unit, Nuffield Department of Clinical Neurosciences, University of Oxford, Mansfield Road, Oxford, OX1 3TH, UK
| | - Elsie Premereur
- Laboratory for Neuro- and Psychophysiology, KU Leuven, Leuven, Belgium
| | | | - Tamara Ramadan
- Department of Biological Sciences, University of Oxford, Oxford, UK
| | - Anna S Mitchell
- Department of Psychology, Speech and Hearing, University of Canterbury, Christchurch, 8041, New Zealand.
| |
Collapse
|
6
|
Pérez-Santos I, García-Cabezas MÁ, Cavada C. Mapping the primate thalamus: systematic approach to analyze the distribution of subcortical neuromodulatory afferents. Brain Struct Funct 2023:10.1007/s00429-023-02619-w. [PMID: 36890350 DOI: 10.1007/s00429-023-02619-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 02/09/2023] [Indexed: 03/10/2023]
Abstract
Neuromodulatory afferents to thalamic nuclei are key for information transmission and thus play critical roles in sensory, motor, and limbic processes. Over the course of the last decades, diverse attempts have been made to map and describe subcortical neuromodulatory afferents to the primate thalamus, including axons using acetylcholine, serotonin, dopamine, noradrenaline, adrenaline, and histamine. Our group has been actively involved in this endeavor. The published descriptions on neuromodulatory afferents to the primate thalamus have been made in different laboratories and are not fully comparable due to methodological divergences (for example, fixation procedures, planes of cutting, techniques used to detect the afferents, different criteria for identification of thalamic nuclei…). Such variation affects the results obtained. Therefore, systematic methodological and analytical approaches are much needed. The present article proposes reproducible methodological and terminological frameworks for primate thalamic mapping. We suggest the use of standard stereotaxic planes to produce and present maps of the primate thalamus, as well as the use of the Anglo-American school terminology (vs. the German school terminology) for identification of thalamic nuclei. Finally, a public repository of the data collected under agreed-on frameworks would be a useful tool for looking up and comparing data on the structure and connections of primate thalamic nuclei. Important and agreed-on efforts are required to create, manage, and fund a unified and homogeneous resource of data on the primate thalamus. Likewise, a firm commitment of the institutions to preserve experimental brain material is much needed because neuroscience work with non-human primates is becoming increasingly rare, making earlier material still more valuable.
Collapse
Affiliation(s)
- Isabel Pérez-Santos
- Department of Anatomy, Histology and Neuroscience, School of Medicine, Facultad de Medicina, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo 4, 28029, Madrid, Spain.,PhD Program in Neuroscience, Universidad Autónoma de Madrid-Cajal, Madrid, Spain
| | - Miguel Ángel García-Cabezas
- Department of Anatomy, Histology and Neuroscience, School of Medicine, Facultad de Medicina, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo 4, 28029, Madrid, Spain.,PhD Program in Neuroscience, Universidad Autónoma de Madrid-Cajal, Madrid, Spain.,Neural Systems Laboratory, Department of Health Sciences, Boston University, Boston, MA, USA
| | - Carmen Cavada
- Department of Anatomy, Histology and Neuroscience, School of Medicine, Facultad de Medicina, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo 4, 28029, Madrid, Spain. .,PhD Program in Neuroscience, Universidad Autónoma de Madrid-Cajal, Madrid, Spain.
| |
Collapse
|
7
|
Zhang D, Yao J, Ma J, Gao L, Sun J, Fang J, He H, Wu T. Connectivity of corticostriatal circuits in nonmanifesting LRRK2 G2385R and R1628P carriers. CNS Neurosci Ther 2022; 28:2024-2031. [PMID: 35934920 PMCID: PMC9627388 DOI: 10.1111/cns.13933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 07/17/2022] [Accepted: 07/21/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Neuroimaging studies have shown that the functional connectivity (FC) of corticostriatal circuits in nonmanifesting leucine-rich repeat kinase 2 (LRRK2) G2019S mutation carriers mirrors neural changes in idiopathic Parkinson's disease (PD). In contrast, neural network changes in LRRK2 G2385R and R1628P mutations are unclear. We aimed to investigate the FC of corticostriatal circuits in nonmanifesting LRRK2 G2385R and R1628P mutation carriers (NMCs). METHODS Twenty-three NMCs, 28 PD patients, and 29 nonmanifesting noncarriers (NMNCs) were recruited. LRRK2 mutation analysis was performed on all participants. Clinical evaluation included MDS-UPDRS. RESULTS When compared to NMNCs, NMCs showed significantly reduced FC between the caudate nucleus and superior frontal gyrus and cerebellum, and between the nucleus accumbens and parahippocampal gyrus, amygdala, and insula. We also found increased striatum-cortical FC in NMCs. CONCLUSIONS Although the corticostriatal circuits have characteristic changes similar to PD, the relatively intact function of the sensorimotor striatum-cortical loop may result in less possibility of developing parkinsonian motor symptoms for the NMCs. This study helps explain why LRRK2 G2385R and R1628P mutations are risk factors rather than pathogenic mutations for PD and suggests that various LRRK2 mutations have distinct effects on neural networks.
Collapse
Affiliation(s)
- Dongling Zhang
- Department of Neurology, Center for Movement Disorders, Beijing Tiantan HospitalCapital Medical UniversityBeijingChina,China National Clinical Research Center for Neurological DiseasesBeijingChina
| | - Junye Yao
- Center for Brain Imaging Science and TechnologyCollege of Biomedical Engineering and Instrument ScienceZhejiang UniversityHangzhouChina
| | - Jinghong Ma
- Department of Neurobiology, Beijing Institute of GeriatricsXuanwu Hospital of Capital Medical UniversityBeijingChina
| | - Linlin Gao
- Department of Neurobiology, Beijing Institute of GeriatricsXuanwu Hospital of Capital Medical UniversityBeijingChina
| | - Junyan Sun
- Department of Neurology, Center for Movement Disorders, Beijing Tiantan HospitalCapital Medical UniversityBeijingChina,China National Clinical Research Center for Neurological DiseasesBeijingChina
| | - Jiliang Fang
- Department of Radiology, Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijingChina
| | - Hongjian He
- Center for Brain Imaging Science and TechnologyCollege of Biomedical Engineering and Instrument ScienceZhejiang UniversityHangzhouChina
| | - Tao Wu
- Department of Neurology, Center for Movement Disorders, Beijing Tiantan HospitalCapital Medical UniversityBeijingChina,China National Clinical Research Center for Neurological DiseasesBeijingChina,Parkinson's Disease Center, Beijing Institute for Brain DisordersCapital Medical UniversityBeijingChina
| |
Collapse
|
8
|
Cerebral metabolic pattern associated with progressive parkinsonism in non-human primates reveals early cortical hypometabolism. Neurobiol Dis 2022; 167:105669. [DOI: 10.1016/j.nbd.2022.105669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 02/07/2022] [Accepted: 02/21/2022] [Indexed: 11/17/2022] Open
|
9
|
Del Rey NLG, Trigo-Damas I, Obeso JA, Cavada C, Blesa J. Neuron types in the primate striatum: stereological analysis of projection neurons and interneurons in control and parkinsonian monkeys. Neuropathol Appl Neurobiol 2022; 48:e12812. [PMID: 35274336 DOI: 10.1111/nan.12812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 02/08/2022] [Accepted: 02/12/2022] [Indexed: 11/26/2022]
Abstract
AIMS The striatum is mainly composed of projection neurons. It also contains interneurons, which modulate and control striatal output. The aim of the present study was to assess the percentages of projection neurons and interneuron populations in the striatum of control monkeys and of parkinsonian monkeys. METHODS Unbiased stereology was used to estimate the volume density of every neuron population in the caudate, putamen and ventral striatum of control monkeys and of monkeys treated with MPTP, which results in striatal dopamine depletion. The various neuron population phenotypes were identified by immunohistochemistry. All analyses were performed within the same subjects using similar processing and analysis parameters, thus allowing for reliable data comparisons. RESULTS In control monkeys, the projection neurons, which express the Dopamine-and-cAMP-Regulated-Phosphoprotein, 32-KDa (DARPP-32), were the most abundant: ~86% of the total neurons counted. The interneurons accounted for the remaining 14%. Among the interneurons, those expressing Calretinin were the most abundant (Cr+: ~57%; ~8% of the total striatal neurons counted), followed those expressing Parvalbumin (Pv+: ~18 %; 2.6%), Dinucleotide Phosphate-Diaphorase (NADPH+: ~13 %; 1.8%), Choline Acetyltransferase (ChAT+: ~11%; 1.5%) and Tyrosine Hydroxylase (TH+: ~0.5%; 0.1%). No significant changes in volume densities occurred in any population following dopamine depletion, except for the TH+ interneurons, which increased in parkinsonian non-symptomatic monkeys and even more in symptomatic monkeys. CONCLUSIONS These data are relevant for translational studies targeting specific neuron populations of the striatum. The fact that dopaminergic denervation does not cause neuron loss in any population has potential pathophysiological implications.
Collapse
Affiliation(s)
- Natalia López-González Del Rey
- HM CINAC (Centro Integral de Neurociencias Abarca Campal), Hospital Universitario HM Puerta del Sur, HM Hospitales, Madrid, Spain.,CIBERNED (Center for Networked Biomedical Research on Neurodegenerative Diseases), Instituto Carlos III, Madrid, Spain.,PhD Program in Neuroscience Autónoma de Madrid University-Cajal Institute, Madrid, Spain
| | - Inés Trigo-Damas
- HM CINAC (Centro Integral de Neurociencias Abarca Campal), Hospital Universitario HM Puerta del Sur, HM Hospitales, Madrid, Spain.,CIBERNED (Center for Networked Biomedical Research on Neurodegenerative Diseases), Instituto Carlos III, Madrid, Spain
| | - J A Obeso
- HM CINAC (Centro Integral de Neurociencias Abarca Campal), Hospital Universitario HM Puerta del Sur, HM Hospitales, Madrid, Spain.,CIBERNED (Center for Networked Biomedical Research on Neurodegenerative Diseases), Instituto Carlos III, Madrid, Spain
| | - Carmen Cavada
- PhD Program in Neuroscience Autónoma de Madrid University-Cajal Institute, Madrid, Spain.,Department of Anatomy, Histology and Neuroscience, School of Medicine, Autónoma de Madrid University, Madrid, Spain
| | - Javier Blesa
- HM CINAC (Centro Integral de Neurociencias Abarca Campal), Hospital Universitario HM Puerta del Sur, HM Hospitales, Madrid, Spain.,CIBERNED (Center for Networked Biomedical Research on Neurodegenerative Diseases), Instituto Carlos III, Madrid, Spain
| |
Collapse
|
10
|
Motor and non-motor circuit disturbances in early Parkinson disease: which happens first? Nat Rev Neurosci 2022; 23:115-128. [PMID: 34907352 DOI: 10.1038/s41583-021-00542-9] [Citation(s) in RCA: 70] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/12/2021] [Indexed: 12/15/2022]
Abstract
For the last two decades, pathogenic concepts in Parkinson disease (PD) have revolved around the toxicity and spread of α-synuclein. Thus, α-synuclein would follow caudo-rostral propagation from the periphery to the central nervous system, first producing non-motor manifestations (such as constipation, sleep disorders and hyposmia), and subsequently impinging upon the mesencephalon to account for the cardinal motor features before reaching the neocortex as the disease evolves towards dementia. This model is the prevailing theory of the principal neurobiological mechanism of disease. Here, we scrutinize the temporal evolution of motor and non-motor manifestations in PD and suggest that, even though the postulated bottom-up mechanisms are likely to be involved, early involvement of the nigrostriatal system is a key and prominent pathophysiological mechanism. Upcoming studies of detailed clinical manifestations with newer neuroimaging techniques will allow us to more closely define, in vivo, the role of α-synuclein aggregates with respect to neuronal loss during the onset and progression of PD.
Collapse
|
11
|
Allosteric modulation of dopamine D 2L receptor in complex with G i1 and G i2 proteins: the effect of subtle structural and stereochemical ligand modifications. Pharmacol Rep 2022; 74:406-424. [PMID: 35064921 PMCID: PMC8964653 DOI: 10.1007/s43440-021-00352-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 12/17/2021] [Accepted: 12/28/2021] [Indexed: 12/28/2022]
Abstract
Background Allosteric modulation of G protein-coupled receptors (GPCRs) is nowadays one of the hot topics in drug discovery. In particular, allosteric modulators of D2 receptor have been proposed as potential modern therapeutics to treat schizophrenia and Parkinson’s disease. Methods To address some subtle structural and stereochemical aspects of allosteric modulation of D2 receptor, we performed extensive in silico studies of both enantiomers of two compounds (compound 1 and compound 2), and one of them (compound 2) was synthesized as a racemate in-house and studied in vitro. Results Our molecular dynamics simulations confirmed literature reports that the R enantiomer of compound 1 is a positive allosteric modulator of the D2L receptor, while its S enantiomer is a negative allosteric modulator. Moreover, based on the principal component analysis (PCA), we hypothesized that both enantiomers of compound 2 behave as silent allosteric modulators, in line with our in vitro studies. PCA calculations suggest that the most pronounced modulator-induced receptor rearrangements occur at the transmembrane helix 7 (TM7). In particular, TM7 bending at the conserved P7.50 and G7.42 was observed. The latter resides next to the Y7.43, which is a significant part of the orthosteric binding site. Moreover, the W7.40 conformation seems to be affected by the presence of the positive allosteric modulator. Conclusions Our work reveals that allosteric modulation of the D2L receptor can be affected by subtle ligand modifications. A change in configuration of a chiral carbon and/or minor structural modulator modifications are solely responsible for the functional outcome of the allosteric modulator. Graphical abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1007/s43440-021-00352-x.
Collapse
|
12
|
Leodori G, De Bartolo MI, Guerra A, Fabbrini A, Rocchi L, Latorre A, Paparella G, Belvisi D, Conte A, Bhatia KP, Rothwell JC, Berardelli A. Motor Cortical Network Excitability in Parkinson's Disease. Mov Disord 2022; 37:734-744. [PMID: 35001420 DOI: 10.1002/mds.28914] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 12/13/2021] [Accepted: 12/15/2021] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Motor impairment in Parkinson's disease (PD) reflects changes in the basal ganglia-thalamocortical circuit converging on the primary motor cortex (M1) and supplementary motor area (SMA). Previous studies assessed M1 excitability in PD using transcranial magnetic stimulation (TMS)-evoked electromyographic activity. TMS-evoked electroencephalographic activity may unveil broader motor cortical network changes in PD. OBJECTIVE The aim was to assess motor cortical network excitability in PD. METHODS We compared TMS-evoked cortical potentials (TEPs) from M1 and the pre-SMA between 20 PD patients tested off and on medication and 19 healthy controls (HCs) and investigated possible correlations with bradykinesia. RESULTS Off PD patients compared to HCs had smaller P30 responses from the M1s contralateral (M1+) and ipsilateral (M1-) to the most bradykinetic side and increased pre-SMA N40. Dopaminergic therapy normalized the amplitude of M1+ and M1- P30 as well as pre-SMA N40. We found a positive correlation between M1+ P30 amplitude and bradykinesia in off PD patients. CONCLUSIONS Changes in M1 P30 and pre-SMA N40 in PD suggest that M1 excitability is reduced on both sides, whereas pre-SMA excitability is increased. The effect of dopaminergic therapy and the clinical correlation suggest that these cortical changes may reflect abnormal basal ganglia-thalamocortical activity. TMS electroencephalography provides novel insight into motor cortical network changes related to the pathophysiology of PD. © 2022 International Parkinson and Movement Disorder Society.
Collapse
Affiliation(s)
- Giorgio Leodori
- IRCCS Neuromed, Pozzilli, Italy.,Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | | | | | - Andrea Fabbrini
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Lorenzo Rocchi
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London, United Kingdom.,Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
| | - Anna Latorre
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London, United Kingdom
| | | | - Daniele Belvisi
- IRCCS Neuromed, Pozzilli, Italy.,Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Antonella Conte
- IRCCS Neuromed, Pozzilli, Italy.,Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Kailash P Bhatia
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London, United Kingdom
| | - John C Rothwell
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London, United Kingdom
| | - Alfredo Berardelli
- IRCCS Neuromed, Pozzilli, Italy.,Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| |
Collapse
|
13
|
Rubio-Teves M, Díez-Hermano S, Porrero C, Sánchez-Jiménez A, Prensa L, Clascá F, García-Amado M, Villacorta-Atienza JA. Benchmarking of tools for axon length measurement in individually-labeled projection neurons. PLoS Comput Biol 2021; 17:e1009051. [PMID: 34879058 PMCID: PMC8824366 DOI: 10.1371/journal.pcbi.1009051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 02/08/2022] [Accepted: 11/19/2021] [Indexed: 11/18/2022] Open
Abstract
Projection neurons are the commonest neuronal type in the mammalian forebrain and their individual characterization is a crucial step to understand how neural circuitry operates. These cells have an axon whose arborizations extend over long distances, branching in complex patterns and/or in multiple brain regions. Axon length is a principal estimate of the functional impact of the neuron, as it directly correlates with the number of synapses formed by the axon in its target regions; however, its measurement by direct 3D axonal tracing is a slow and labor-intensive method. On the contrary, axon length estimations have been recently proposed as an effective and accessible alternative, allowing a fast approach to the functional significance of the single neuron. Here, we analyze the accuracy and efficiency of the most used length estimation tools—design-based stereology by virtual planes or spheres, and mathematical correction of the 2D projected-axon length—in contrast with direct measurement, to quantify individual axon length. To this end, we computationally simulated each tool, applied them over a dataset of 951 3D-reconstructed axons (from NeuroMorpho.org), and compared the generated length values with their 3D reconstruction counterparts. The evaluated reliability of each axon length estimation method was then balanced with the required human effort, experience and know-how, and economic affordability. Subsequently, computational results were contrasted with measurements performed on actual brain tissue sections. We show that the plane-based stereological method balances acceptable errors (~5%) with robustness to biases, whereas the projection-based method, despite its accuracy, is prone to inherent biases when implemented in the laboratory. This work, therefore, aims to provide a constructive benchmark to help guide the selection of the most efficient method for measuring specific axonal morphologies according to the particular circumstances of the conducted research. Characterization of single neurons is a crucial step to understand how neural circuitry operates. Visualization of individual neurons is feasible thanks to labelling techniques that allow precise measurements at cellular resolution. This milestone gave access to powerful estimators of the functional impact of a neuron, such as axon length. Although techniques relying on direct 3D reconstruction of individual axons are the gold standard, handiness and accessibility are still an issue. Indirect estimations of axon length have been proposed as agile and effective alternatives, each offering different solutions to the accuracy-cost tradeoff. In this work we report a computational benchmarking between three experimental tools used for axon length estimation on brain tissue sections. Performance of each tool was simulated and tested for 951 3D-reconstructed axons, by comparing estimated axon lengths against direct measurements. Assessment of suitability to different research and funding circumstances is also provided, taking into consideration factors such as training expertise, economic cost and required equipment, alongside methodological results. These findings could be an important reference for research on neuronal wiring, as well as for broader studies involving neuroanatomical and neural circuit modelling.
Collapse
Affiliation(s)
- Mario Rubio-Teves
- Department of Anatomy & Neuroscience, School of Medicine, Autónoma de Madrid University, Madrid, Spain
| | - Sergio Díez-Hermano
- Department of Biodiversity, ecology and evolution, Biomathematics Unit, Faculty of Biology, Complutense University of Madrid, Madrid, Spain
| | - César Porrero
- Department of Anatomy & Neuroscience, School of Medicine, Autónoma de Madrid University, Madrid, Spain
| | - Abel Sánchez-Jiménez
- Department of Biodiversity, ecology and evolution, Biomathematics Unit, Faculty of Biology, Complutense University of Madrid, Madrid, Spain
| | - Lucía Prensa
- Department of Anatomy & Neuroscience, School of Medicine, Autónoma de Madrid University, Madrid, Spain
| | - Francisco Clascá
- Department of Anatomy & Neuroscience, School of Medicine, Autónoma de Madrid University, Madrid, Spain
| | - María García-Amado
- Department of Anatomy & Neuroscience, School of Medicine, Autónoma de Madrid University, Madrid, Spain
| | - José Antonio Villacorta-Atienza
- Department of Biodiversity, ecology and evolution, Biomathematics Unit, Faculty of Biology, Complutense University of Madrid, Madrid, Spain
- * E-mail:
| |
Collapse
|
14
|
Doppler CEJ, Kinnerup MB, Brune C, Farrher E, Betts M, Fedorova TD, Schaldemose JL, Knudsen K, Ismail R, Seger AD, Hansen AK, Stær K, Fink GR, Brooks DJ, Nahimi A, Borghammer P, Sommerauer M. Regional locus coeruleus degeneration is uncoupled from noradrenergic terminal loss in Parkinson's disease. Brain 2021; 144:2732-2744. [PMID: 34196700 DOI: 10.1093/brain/awab236] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 05/18/2021] [Accepted: 06/06/2021] [Indexed: 11/13/2022] Open
Abstract
Previous studies have reported substantial involvement of the noradrenergic system in Parkinson's disease. Neuromelanin-sensitive MRI sequences and PET tracers have become available to visualize the cell bodies in the locus coeruleus and the density of noradrenergic terminal transporters. Combining these methods, we investigated the relationship of neurodegeneration in these distinct compartments in Parkinson's disease. We examined 93 subjects (40 healthy controls and 53 Parkinson's disease patients) with neuromelanin-sensitive turbo spin-echo MRI and calculated locus coeruleus-to-pons signal contrasts. Voxels with the highest intensities were extracted from published locus coeruleus coordinates transformed to individual MRI. To also investigate a potential spatial pattern of locus coeruleus degeneration, we extracted the highest signal intensities from the rostral, middle, and caudal third of the locus coeruleus. Additionally, a study-specific probabilistic map of the locus coeruleus was created and used to extract mean MRI contrast from the entire locus coeruleus and each rostro-caudal subdivision. Locus coeruleus volumes were measured using manual segmentations. A subset of 73 subjects had 11C-MeNER PET to determine noradrenaline transporter density, and distribution volume ratios of noradrenaline transporter-rich regions were computed. Parkinson's disease patients showed reduced locus coeruleus MRI contrast independently of the selected method (voxel approaches: p < 0.0001, p < 0.001; probabilistic map: p < 0.05), specifically on the clinically-defined most affected side (p < 0.05), and reduced locus coeruleus volume (p < 0.0001). Reduced MRI contrast was confined to the middle and caudal locus coeruleus (voxel approach-rostral: p = 0.48, middle: p < 0.0001, and caudal: p < 0.05; probabilistic map-rostral: p = 0.90, middle: p < 0.01, and caudal: p < 0.05). The noradrenaline transporter density was lower in Parkinson's disease patients in all examined regions (group effect p < 0.0001). No significant correlation was observed between locus coeruleus MRI contrast and noradrenaline transporter density. In contrast, the individual ratios of noradrenaline transporter density and locus coeruleus MRI contrast were lower in Parkinson's disease patients in all examined regions (group effect p < 0.001). Our multimodal imaging approach revealed pronounced noradrenergic terminal loss relative to cellular locus coeruleus degeneration in Parkinson's disease; the latter followed a distinct spatial pattern with the middle-caudal portion being more affected than the rostral part. The data shed first light on the interaction between the axonal and cell body compartments and their differential susceptibility to neurodegeneration in Parkinson's disease, which may eventually direct research toward potential novel treatment approaches.
Collapse
Affiliation(s)
- Christopher E J Doppler
- Institute of Neuroscience and Medicine (INM-3), Forschungszentrum Jülich, D-52425 Jülich, Germany.,University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, D-50937 Köln, Germany
| | - Martin B Kinnerup
- Department of Nuclear Medicine and PET, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Corinna Brune
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, D-50937 Köln, Germany
| | - Ezequiel Farrher
- Institute of Neuroscience and Medicine (INM-4), Forschungszentrum Jülich, D-52425 Jülich, Germany
| | - Matthew Betts
- German Center for Neurodegenerative Diseases (DZNE), D-39120 Magdeburg, Germany.,Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke-University Magdeburg, D-39120 Magdeburg, Germany.,Center for Behavioral Brain Sciences, University of Magdeburg, D-39120 Magdeburg, Germany
| | - Tatyana D Fedorova
- Department of Nuclear Medicine and PET, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Jeppe L Schaldemose
- Department of Nuclear Medicine and PET, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Karoline Knudsen
- Department of Nuclear Medicine and PET, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Rola Ismail
- Department of Nuclear Medicine and PET, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Aline D Seger
- Institute of Neuroscience and Medicine (INM-3), Forschungszentrum Jülich, D-52425 Jülich, Germany.,University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, D-50937 Köln, Germany
| | - Allan K Hansen
- Department of Nuclear Medicine and PET, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Kristian Stær
- Department of Nuclear Medicine and PET, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Gereon R Fink
- Institute of Neuroscience and Medicine (INM-3), Forschungszentrum Jülich, D-52425 Jülich, Germany.,University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, D-50937 Köln, Germany
| | - David J Brooks
- Department of Nuclear Medicine and PET, Aarhus University Hospital, DK-8200 Aarhus N, Denmark.,Division of Brain Sciences, Imperial College London, London SW7 2AZ, UK.,Institute of Translational and Clinical Research, University of Newcastle upon Tyne, Newcastle upon Tyne NE1 7RU, UK
| | - Adjmal Nahimi
- Department of Nuclear Medicine and PET, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Per Borghammer
- Department of Nuclear Medicine and PET, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Michael Sommerauer
- Institute of Neuroscience and Medicine (INM-3), Forschungszentrum Jülich, D-52425 Jülich, Germany.,University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, D-50937 Köln, Germany.,Department of Nuclear Medicine and PET, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| |
Collapse
|
15
|
Perry BAL, Lomi E, Mitchell AS. Thalamocortical interactions in cognition and disease: the mediodorsal and anterior thalamic nuclei. Neurosci Biobehav Rev 2021; 130:162-177. [PMID: 34216651 DOI: 10.1016/j.neubiorev.2021.05.032] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 04/12/2021] [Accepted: 05/17/2021] [Indexed: 01/15/2023]
Abstract
The mediodorsal thalamus (MD) and anterior thalamic nuclei (ATN) are two adjacent brain nodes that support our ability to make decisions, learn, update information, form and retrieve memories, and find our way around. The MD and PFC work in partnerships to support cognitive processes linked to successful learning and decision-making, while the ATN and extended hippocampal system together coordinate the encoding and retrieval of memories and successful spatial navigation. Yet, while these distinctions may appear to be segregated, both the MD and ATN together support our higher cognitive functions as they regulate and are influenced by interconnected fronto-temporal neural networks and subcortical inputs. Our review focuses on recent studies in animal models and in humans. This evidence is re-shaping our understanding of the importance of MD and ATN cortico-thalamocortical pathways in influencing complex cognitive functions. Given the evidence from clinical settings and neuroscience research labs, the MD and ATN should be considered targets for effective treatments in neuropsychiatric diseases and disorders and neurodegeneration.
Collapse
Affiliation(s)
- Brook A L Perry
- Department of Experimental Psychology, Oxford University, The Tinsley Building, Mansfield Road, OX1 3SR, United Kingdom
| | - Eleonora Lomi
- Department of Experimental Psychology, Oxford University, The Tinsley Building, Mansfield Road, OX1 3SR, United Kingdom
| | - Anna S Mitchell
- Department of Experimental Psychology, Oxford University, The Tinsley Building, Mansfield Road, OX1 3SR, United Kingdom.
| |
Collapse
|
16
|
Bai X, Zhou C, Guo T, Guan X, Wu J, Liu X, Gao T, Gu L, Xuan M, Gu Q, Huang P, Song Z, Yan Y, Pu J, Zhang B, Xu X, Zhang M. Progressive microstructural alterations in subcortical nuclei in Parkinson's disease: A diffusion magnetic resonance imaging study. Parkinsonism Relat Disord 2021; 88:82-89. [PMID: 34147950 DOI: 10.1016/j.parkreldis.2021.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 04/22/2021] [Accepted: 06/06/2021] [Indexed: 12/12/2022]
Abstract
OBJECTIVES To explore the microstructural alterations in subcortical nuclei in Parkinson's disease (PD) at different stages with diffusion kurtosis imaging (DKI) and tensor imaging and to test the performance of diffusion metrics in identifying PD. METHODS 108 PD patients (64 patients in early-stage PD group (EPD) and 44 patients in moderate-late-stage PD group (MLPD)) and 64 healthy controls (HC) were included. Tensor and kurtosis metrics in the subcortical nuclei were compared. Partial correlation was used to correlate the diffusion metrics and Unified Parkinson's Disease Rating Scale part-III (UPDRS-III) score. Logistic regression and receiver operating characteristic analysis were applied to test the diagnostic performance of the diffusion metrics. RESULTS Compared with HC, both EPD and MLPD patients showed higher fractional anisotropy and axial diffusivity, lower mean kurtosis (MK) and axial kurtosis in substantia nigra, lower MK and radial kurtosis (RK) in globus pallidus (GP) and thalamus (all p < 0.05). Compared with EPD, MLPD patients showed lower MK and RK in GP and thalamus (all p < 0.05). MK and RK in GP and thalamus were negatively correlated with UPDRS-III score (all p < 0.01). The logistic regression model combining kurtosis and tensor metrics showed the best performance in diagnosing PD, EPD, and MLPD (areas under curve were 0.817, 0.769, and 0.914, respectively). CONCLUSIONS PD has progressive microstructural alterations in the subcortical nuclei. DKI is sensitive to detect microstructural alterations in GP and thalamus during PD progression. Combining kurtosis and tensor metrics can achieve a good performance in diagnosing PD.
Collapse
Affiliation(s)
- Xueqin Bai
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Cheng Zhou
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Tao Guo
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Xiaojun Guan
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Jingjing Wu
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Xiaocao Liu
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Ting Gao
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Luyan Gu
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Min Xuan
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Quanquan Gu
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Peiyu Huang
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Zhe Song
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Yaping Yan
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Jiali Pu
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Baorong Zhang
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Xiaojun Xu
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China
| | - Minming Zhang
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, China.
| |
Collapse
|
17
|
Cuenca-Bermejo L, Pizzichini E, Gonçalves VC, Guillén-Díaz M, Aguilar-Moñino E, Sánchez-Rodrigo C, González-Cuello AM, Fernández-Villalba E, Herrero MT. A New Tool to Study Parkinsonism in the Context of Aging: MPTP Intoxication in a Natural Model of Multimorbidity. Int J Mol Sci 2021; 22:4341. [PMID: 33919373 PMCID: PMC8122583 DOI: 10.3390/ijms22094341] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/14/2021] [Accepted: 04/19/2021] [Indexed: 11/25/2022] Open
Abstract
The diurnal rodent Octodon degus (O. degus) is considered an attractive natural model for Alzheimer's disease and other human age-related features. However, it has not been explored so far if the O. degus could be used as a model to study Parkinson's disease. To test this idea, 10 adult male O. degus were divided into control group and MPTP-intoxicated animals. Motor condition and cognition were examined. Dopaminergic degeneration was studied in the ventral mesencephalon and in the striatum. Neuroinflammation was also evaluated in the ventral mesencephalon, in the striatum and in the dorsal hippocampus. MPTP animals showed significant alterations in motor activity and in visuospatial memory. Postmortem analysis revealed a significant decrease in the number of dopaminergic neurons in the ventral mesencephalon of MPTP animals, although no differences were found in their striatal terminals. We observed a significant increase in neuroinflammatory responses in the mesencephalon, in the striatum and in the hippocampus of MPTP-intoxicated animals. Additionally, changes in the subcellular expression of the calcium-binding protein S100β were found in the astrocytes in the nigrostriatal pathway. These findings prove for the first time that O. degus are sensitive to MPTP intoxication and, therefore, is a suitable model for experimental Parkinsonism in the context of aging.
Collapse
Affiliation(s)
- Lorena Cuenca-Bermejo
- Clinical and Experimental Neuroscience (NiCE), Institute for Aging Research (IUIE), School of Medicine, University of Murcia, 30100 Murcia, Spain; (L.C.-B.); (E.P.); (V.C.G.); (M.G.-D.); (E.A.-M.); (C.S.-R.); (A.-M.G.-C.)
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus Mare Nostrum, University of Murcia, 30120 Murcia, Spain
| | - Elisa Pizzichini
- Clinical and Experimental Neuroscience (NiCE), Institute for Aging Research (IUIE), School of Medicine, University of Murcia, 30100 Murcia, Spain; (L.C.-B.); (E.P.); (V.C.G.); (M.G.-D.); (E.A.-M.); (C.S.-R.); (A.-M.G.-C.)
- Department of Biology and Biotechnology “Charles Darwin” (BBCD), Sapienza, University of Rome, 00185 Rome, Italy
| | - Valeria C. Gonçalves
- Clinical and Experimental Neuroscience (NiCE), Institute for Aging Research (IUIE), School of Medicine, University of Murcia, 30100 Murcia, Spain; (L.C.-B.); (E.P.); (V.C.G.); (M.G.-D.); (E.A.-M.); (C.S.-R.); (A.-M.G.-C.)
- Disciplina de Neurociência, Departamento de Neurologia e Neurocirurgia, Universidade Federal de São Paulo (UNIFESP), São Paulo 04039-032, Brazil
| | - María Guillén-Díaz
- Clinical and Experimental Neuroscience (NiCE), Institute for Aging Research (IUIE), School of Medicine, University of Murcia, 30100 Murcia, Spain; (L.C.-B.); (E.P.); (V.C.G.); (M.G.-D.); (E.A.-M.); (C.S.-R.); (A.-M.G.-C.)
| | - Elena Aguilar-Moñino
- Clinical and Experimental Neuroscience (NiCE), Institute for Aging Research (IUIE), School of Medicine, University of Murcia, 30100 Murcia, Spain; (L.C.-B.); (E.P.); (V.C.G.); (M.G.-D.); (E.A.-M.); (C.S.-R.); (A.-M.G.-C.)
| | - Consuelo Sánchez-Rodrigo
- Clinical and Experimental Neuroscience (NiCE), Institute for Aging Research (IUIE), School of Medicine, University of Murcia, 30100 Murcia, Spain; (L.C.-B.); (E.P.); (V.C.G.); (M.G.-D.); (E.A.-M.); (C.S.-R.); (A.-M.G.-C.)
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus Mare Nostrum, University of Murcia, 30120 Murcia, Spain
| | - Ana-María González-Cuello
- Clinical and Experimental Neuroscience (NiCE), Institute for Aging Research (IUIE), School of Medicine, University of Murcia, 30100 Murcia, Spain; (L.C.-B.); (E.P.); (V.C.G.); (M.G.-D.); (E.A.-M.); (C.S.-R.); (A.-M.G.-C.)
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus Mare Nostrum, University of Murcia, 30120 Murcia, Spain
| | - Emiliano Fernández-Villalba
- Clinical and Experimental Neuroscience (NiCE), Institute for Aging Research (IUIE), School of Medicine, University of Murcia, 30100 Murcia, Spain; (L.C.-B.); (E.P.); (V.C.G.); (M.G.-D.); (E.A.-M.); (C.S.-R.); (A.-M.G.-C.)
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus Mare Nostrum, University of Murcia, 30120 Murcia, Spain
| | - María Trinidad Herrero
- Clinical and Experimental Neuroscience (NiCE), Institute for Aging Research (IUIE), School of Medicine, University of Murcia, 30100 Murcia, Spain; (L.C.-B.); (E.P.); (V.C.G.); (M.G.-D.); (E.A.-M.); (C.S.-R.); (A.-M.G.-C.)
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus Mare Nostrum, University of Murcia, 30120 Murcia, Spain
| |
Collapse
|
18
|
Sedaghat K, Gundlach AL, Finkelstein DI. Analysis of morphological and neurochemical changes in subthalamic nucleus neurons in response to a unilateral 6-OHDA lesion of the substantia nigra in adult rats. IBRO Neurosci Rep 2021; 10:96-103. [PMID: 33842916 PMCID: PMC8019994 DOI: 10.1016/j.ibneur.2021.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/28/2020] [Accepted: 01/12/2021] [Indexed: 11/29/2022] Open
Abstract
Background Subthalamic nucleus (STN) neurons undergo changes in their pattern of activity and morphology during the clinical course of Parkinson’s disease (PD). Striatal dopamine depletion and hyperactivity of neurons in the parafascicular nucleus (Pf) of the intralaminar thalamus are predicted to contribute to the STN changes. Objective This study investigated possible morphological and neurochemical changes in STN neurons in a rat model of unilateral, nigral dopamine neuron loss, in relation to previously documented alterations in Pf neurons. Methods Male Sprague-Dawley rats received a unilateral injection of 6-hydroxydopamine (6-OHDA) into the substantia nigra pars compacta (SNpc). Rats were randomly divided into two groups (6/group) for study at 1 and 5 months by post-treatment. The extent of SNpc dopamine neuron damage was assessed in an amphetamine-induced rotation test and postmortem assessment of tyrosine hydroxylase mRNA levels using in situ hybridization histochemistry. Neural cross-sectional measurements and assessment of vesicular glutamate transporter-2 (vGlut2) mRNA levels were performed to measure the impact on neurons in the STN. Results A unilateral SNpc dopaminergic neuron lesion significantly decreased the cross-sectional area of STN neurons ipsilateral to the lesion, at 1 month (P < 0.05) and 5 months (P < 0.01) post-lesion, while bilateral vGlut2 mRNA levels in STN neurons were unaltered. Conclusions Decreased size of STN neurons in the presence of sustained vGlut2 mRNA levels following a unilateral SNpc 6-OHDA lesion, indicate altered STN physiology. This study presents further details of changes within the STN, coincident with observed alterations in Pf neurons and behaviour. Data availability The data associated with the findings of this study are available from the corresponding author upon request.
Collapse
Affiliation(s)
- Katayoun Sedaghat
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria, Australia
| | - Andrew L Gundlach
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria, Australia
| | - David I Finkelstein
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria, Australia
| |
Collapse
|
19
|
Sejnoha Minsterova A, Klobusiakova P, Pies A, Galaz Z, Mekyska J, Novakova L, Nemcova Elfmarkova N, Rektorova I. Patterns of diffusion kurtosis changes in Parkinson's disease subtypes. Parkinsonism Relat Disord 2020; 81:96-102. [DOI: 10.1016/j.parkreldis.2020.10.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 10/15/2020] [Accepted: 10/17/2020] [Indexed: 01/10/2023]
|
20
|
Enterría-Morales D, Del Rey NLG, Blesa J, López-López I, Gallet S, Prévot V, López-Barneo J, d'Anglemont de Tassigny X. Molecular targets for endogenous glial cell line-derived neurotrophic factor modulation in striatal parvalbumin interneurons. Brain Commun 2020; 2:fcaa105. [PMID: 32954345 PMCID: PMC7472905 DOI: 10.1093/braincomms/fcaa105] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 06/05/2020] [Accepted: 06/23/2020] [Indexed: 12/20/2022] Open
Abstract
Administration of recombinant glial cell line-derived neurotrophic factor into the putamen has been tested in preclinical and clinical studies to evaluate its neuroprotective effects on the progressive dopaminergic neuronal degeneration that characterizes Parkinson’s disease. However, intracerebral glial cell line-derived neurotrophic factor infusion is a challenging therapeutic strategy, with numerous potential technical and medical limitations. Most of these limitations could be avoided if the production of endogenous glial cell line-derived neurotrophic factor could be increased. Glial cell line-derived neurotrophic factor is naturally produced in the striatum from where it exerts a trophic action on the nigrostriatal dopaminergic pathway. Most of striatal glial cell line-derived neurotrophic factor is synthesized by a subset of GABAergic interneurons characterized by the expression of parvalbumin. We sought to identify molecular targets specific to those neurons and which are putatively associated with glial cell line-derived neurotrophic factor synthesis. To this end, the transcriptomic differences between glial cell line-derived neurotrophic factor-positive parvalbumin neurons in the striatum and parvalbumin neurons located in the nearby cortex, which do not express glial cell line-derived neurotrophic factor, were analysed. Using mouse reporter models, we have defined the genomic signature of striatal parvalbumin interneurons obtained by fluorescence-activated cell sorting followed by microarray comparison. Short-listed genes were validated by additional histological and molecular analyses. These genes code for membrane receptors (Kit, Gpr83, Tacr1, Tacr3, Mc3r), cytosolic proteins (Pde3a, Crabp1, Rarres2, Moxd1) and a transcription factor (Lhx8). We also found the proto-oncogene cKit to be highly specific of parvalbumin interneurons in the non-human primate striatum, thus highlighting a conserved expression between species and suggesting that specific genes identified in mouse parvalbumin neurons could be putative targets in the human brain. Pharmacological stimulation of four G-protein-coupled receptors enriched in the striatal parvalbumin interneurons inhibited Gdnf expression presumably by decreasing cyclic adenosine monophosphate formation. Additional experiments with pharmacological modulators of adenylyl cyclase and protein kinase A indicated that this pathway is a relevant intracellular route to induce Gdnf gene activation. This preclinical study is an important step in the ongoing development of a specific pro-endo-glial cell line-derived neurotrophic factor pharmacological strategy to treat Parkinson’s disease.
Collapse
Affiliation(s)
- Daniel Enterría-Morales
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío, CSIC, Universidad de Sevilla, Seville, Spain.,Departamento de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Seville, Spain
| | | | - Javier Blesa
- HM CINAC, Hospital Universitario HM Puerta del Sur, Móstoles, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Ivette López-López
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío, CSIC, Universidad de Sevilla, Seville, Spain
| | - Sarah Gallet
- Univ. Lille, Inserm, CHU Lille, Lille Neuroscience & Cognition, Laboratory of Development and Plasticity of the Neuroendocrine Brain, UMR-S 1172, Lille, France
| | - Vincent Prévot
- Univ. Lille, Inserm, CHU Lille, Lille Neuroscience & Cognition, Laboratory of Development and Plasticity of the Neuroendocrine Brain, UMR-S 1172, Lille, France
| | - José López-Barneo
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío, CSIC, Universidad de Sevilla, Seville, Spain.,Departamento de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Seville, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Xavier d'Anglemont de Tassigny
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío, CSIC, Universidad de Sevilla, Seville, Spain.,Departamento de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Seville, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| |
Collapse
|