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The BDNF Val66Met polymorphism (rs6265) enhances dopamine neuron graft efficacy and side-effect liability in rs6265 knock-in rats. Neurobiol Dis 2020; 148:105175. [PMID: 33188920 PMCID: PMC7855552 DOI: 10.1016/j.nbd.2020.105175] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/02/2020] [Accepted: 11/06/2020] [Indexed: 01/10/2023] Open
Abstract
Prevalent in approximately 20% of the worldwide human population, the
rs6265 (also called ‘Val66Met’) single nucleotide polymorphism
(SNP) in the gene for brain-derived neurotrophic factor (BDNF)
is a common genetic variant that can alter therapeutic responses in individuals
with Parkinson’s disease (PD). Possession of the variant Met allele
results in decreased activity-dependent release of BDNF. Given the resurgent
worldwide interest in neural transplantation for PD and the biological relevance
of BDNF, the current studies examined the effects of the rs6265 SNP on
therapeutic efficacy and side-effect development following primary dopamine (DA)
neuron transplantation. Considering the significant reduction in BDNF release
associated with rs6265, we hypothesized that rs6265-mediated dysfunctional BDNF
signaling contributes to the limited clinical benefit observed in a
subpopulation of PD patients despite robust survival of grafted DA neurons, and
further, that this mutation contributes to the development of aberrant
graft-induced dyskinesias (GID). To this end, we generated a CRISPR knock-in rat
model of the rs6265 BDNF SNP to examine for the first time the
influence of a common genetic polymorphism on graft survival, functional
efficacy, and side-effect liability, comparing these parameters between
wild-type (Val/Val) rats and those homozygous for the variant Met allele
(Met/Met). Counter to our hypothesis, the current research indicates that
Met/Met rats show enhanced graft-associated therapeutic efficacy and a
paradoxical enhancement of graft-derived neurite outgrowth compared to wild-type
rats. However, consistent with our hypothesis, we demonstrate that the rs6265
genotype in the host rat is strongly linked to development of GID, and that this
behavioral phenotype is significantly correlated with neurochemical signatures
of atypical glutamatergic neurotransmission by grafted DA neurons.
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Rylander Ottosson D, Lane E. Striatal Plasticity in L-DOPA- and Graft-Induced Dyskinesia; The Common Link? Front Cell Neurosci 2016; 10:16. [PMID: 26903804 PMCID: PMC4744851 DOI: 10.3389/fncel.2016.00016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 01/15/2016] [Indexed: 12/31/2022] Open
Abstract
One of the major symptoms of the neurodegenerative condition Parkinson's disease (PD) is a slowness or loss of voluntary movement, yet frustratingly therapeutic strategies designed to restore movement can result in the development of excessive abnormal movements known as dyskinesia. These dyskinesias commonly develop as a result of pharmacotherapy in the form of L-DOPA administration, but have also been identified following deep brain stimulation (DBS) and intrastriatal cell transplantation. In the case of L-DOPA these movements can be treatment limiting, and whilst they are not long lasting or troubling following DBS, recognition of their development had a near devastating effect on the field of cell transplantation for PD.Understanding the relationship between these therapeutic approaches and the development of dyskinesia may improve our ability to restore function without disabling side effects. Interestingly, despite the fact that dopaminergic cell transplantation repairs many of the changes induced by the disease process and through L-DOPA treatment, there appears to be a relationship between the two. In rodent models of the disease, the severity of dyskinesia induced by L-DOPA prior to the transplantation procedure correlated with post-transplantation, graft-induced dyskinesia. A review of clinical data also suggested that the worse preoperational dyskinesia causes worsened graft-induced dyskinesia (GID). Understanding how these aberrant behaviors come about has been of keen interest to open up these therapeutic options more widely and one major underlying theory is the effects of these approaches on the plasticity of synapses within the basal ganglia. This review uniquely brings together developments in understanding the role of striatal synaptic plasticity in both L-DOPA and GID to guide and stimulate further investigations on the important striatal plasticity.
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Affiliation(s)
- Daniella Rylander Ottosson
- Developmental and Regenerative Neurobiology, Department of Experimental Medical Science, Lund UniversityLund, Sweden
| | - Emma Lane
- School of Pharmacy and Pharmaceutical Sciences, Cardiff UniversityCardiff, UK
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Haobam R, Tripathy D, Kaidery NA, Mohanakumar KP. Embryonic stem cells derived neuron transplantation recovery in models of parkinsonism in relation to severity of the disorder in rats. Rejuvenation Res 2016; 18:173-84. [PMID: 25546608 DOI: 10.1089/rej.2014.1626] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
6-Hydroxydopamine (6-OHDA)- and 1-methyl-4-phenylpyridinium (MPP(+))-induced hemi-parkinsonism was investigated in relation to the severity of the disorder in terms of behavioral disability and nigral neuronal loss and recovery regarding the number of stem cell-derived neurons transplanted in the striatum. Intra-median forebrain bundle infusion of the parkinsonian neurotoxins and intra-striatal transplantation of differentiated embryonic stem cells (ESCs) were carried out by rat brain stereotaxic surgery. The severity of the disease was determined using the number of amphetamine- or apomorphine-induced rotations, striatal dopamine levels as estimated by high-performance liquid chromatography (HPLC)-electrochemistry, and the number of surviving tyrosine hydroxylase immunoreactive dopaminergic neurons in the substantia nigra pars compacta. Rats that received unilateral infusion of 6-OHDA or MPP(+) responded with dose-dependent, unilateral bias in turning behavior when amphetamine or apomorphine was administered. Rotational asymmetry in both models correlated significantly well with the loss in the number of nigral dopaminergic neurons and striatal dopamine depletion. Transplantation of 2×10(5) differentiated murine ESCs revealed remarkably similar kinds of recovery in both animal models. The survival of the grafted dopaminergic cells in the striatum was better in animals with low-severity parkinsonism, but poor in the animals with severe parkinsonism. Amphetamine-induced rotational recovery correlated positively with an increasing number of cells transplanted in animals with uniform nigral neuronal lesion. These results suggest that disease severity is an important factor for determining the number of cells to be transplanted in parkinsonian rats for desirable recovery, which may be true in clinical conditions too.
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Affiliation(s)
- Reena Haobam
- 1 Division of Cell Biology & Physiology, Laboratory of Clinical and Experimental Neuroscience, CSIR-Indian Institute of Chemical Biology , Jadavpur, Kolkata, India
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Chiu CH, Li IH, Weng SJ, Huang YS, Wu SC, Chou TK, Huang WS, Liao MH, Shiue CY, Cheng CY, Ma KH. PET Imaging of Serotonin Transporters With 4-[(18)F]-ADAM in a Parkinsonian Rat Model With Porcine Neural Xenografts. Cell Transplant 2015; 25:301-11. [PMID: 25994923 DOI: 10.3727/096368915x688236] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Parkinson's disease (PD) is a neurodegenerative disease characterized by a loss of dopaminergic neurons in the nigrostriatal pathway. Apart from effective strategies to halt the underlying neuronal degeneration, cell replacement now offers novel prospects for PD therapy. Porcine embryonic neural tissue has been considered an alternative source to human fetal grafts in neurodegenerative disorders because its use avoids major practical and ethical issues. This study was undertaken to evaluate the effects of embryonic day 27 (E27) porcine mesencephalic tissue transplantation in a PD rat model using animal positron emission tomography (PET) coupled with 4-[(18)F]-ADAM, a serotonin transporter (SERT) imaging agent. The parkinsonian rat was induced by injecting 6-hydroxydopamine into the medial forebrain bundle (MFB) of the right nigrostriatal pathway. The apomorphine-induced rotation behavioral test and 4-[(18)F]-ADAM/animal PET scanning were carried out following 6-OHDA lesioning. At the second week following 6-OHDA lesioning, the parkinsonian rat rotates substantially on apomorphine-induced contralateral turning. In addition, the mean striatal-specific uptake ratio (SUR) of 4-[(18)F]-ADAM decreased by 44%. After transplantation, the number of drug-induced rotations decreased markedly, and the mean SUR of 4-[(18)F]-ADAM and the level of SERT immunoreactivity (SERT-ir) in striatum were partially restored. The mean SUR level was restored to 71% compared to that for the contralateral intact side, which together with the abundant survival of tyrosine hydroxylase (TH) neurons accounted for functional recovery at the fourth week postgraft. In regard to the extent of donor-derived cells, we found the neurons of the xenografts from E27 transgenic pigs harboring red fluorescent protein (RFP) localized with TH-ir cells and SERT-ir in the grafted area. Thus, transplanted E27 porcine mesencephalic tissue may restore dopaminergic and serotonergic systems in the parkinsonian rat. The 4-[(18)F]-ADAM/animal PET can be used to detect serotonergic neuron loss in PD and monitor the efficacy of therapy.
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Affiliation(s)
- Chuang-Hsin Chiu
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
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Huot P, Fox SH, Brotchie JM. Monoamine reuptake inhibitors in Parkinson's disease. PARKINSON'S DISEASE 2015; 2015:609428. [PMID: 25810948 PMCID: PMC4355567 DOI: 10.1155/2015/609428] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 12/26/2014] [Indexed: 12/13/2022]
Abstract
The motor manifestations of Parkinson's disease (PD) are secondary to a dopamine deficiency in the striatum. However, the degenerative process in PD is not limited to the dopaminergic system and also affects serotonergic and noradrenergic neurons. Because they can increase monoamine levels throughout the brain, monoamine reuptake inhibitors (MAUIs) represent potential therapeutic agents in PD. However, they are seldom used in clinical practice other than as antidepressants and wake-promoting agents. This review article summarises all of the available literature on use of 50 MAUIs in PD. The compounds are divided according to their relative potency for each of the monoamine transporters. Despite wide discrepancy in the methodology of the studies reviewed, the following conclusions can be drawn: (1) selective serotonin transporter (SERT), selective noradrenaline transporter (NET), and dual SERT/NET inhibitors are effective against PD depression; (2) selective dopamine transporter (DAT) and dual DAT/NET inhibitors exert an anti-Parkinsonian effect when administered as monotherapy but do not enhance the anti-Parkinsonian actions of L-3,4-dihydroxyphenylalanine (L-DOPA); (3) dual DAT/SERT inhibitors might enhance the anti-Parkinsonian actions of L-DOPA without worsening dyskinesia; (4) triple DAT/NET/SERT inhibitors might exert an anti-Parkinsonian action as monotherapy and might enhance the anti-Parkinsonian effects of L-DOPA, though at the expense of worsening dyskinesia.
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Affiliation(s)
- Philippe Huot
- Toronto Western Research Institute, Toronto Western Hospital, University Health Network, 399 Bathurst Street, Toronto, ON, Canada M5T 2S8
- Division of Neurology, Movement Disorder Clinic, Toronto Western Hospital, University Health Network, University of Toronto, 399 Bathurst Street, Toronto, ON, Canada M5T 2S8
- Department of Pharmacology and Division of Neurology, Faculty of Medicine, Université de Montréal and Centre Hospitalier de l'Université de Montréal, Montréal, QC, Canada
| | - Susan H. Fox
- Toronto Western Research Institute, Toronto Western Hospital, University Health Network, 399 Bathurst Street, Toronto, ON, Canada M5T 2S8
- Division of Neurology, Movement Disorder Clinic, Toronto Western Hospital, University Health Network, University of Toronto, 399 Bathurst Street, Toronto, ON, Canada M5T 2S8
| | - Jonathan M. Brotchie
- Toronto Western Research Institute, Toronto Western Hospital, University Health Network, 399 Bathurst Street, Toronto, ON, Canada M5T 2S8
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Petit GH, Olsson TT, Brundin P. Review: The future of cell therapies and brain repair:
P
arkinson's disease leads the way. Neuropathol Appl Neurobiol 2014; 40:60-70. [DOI: 10.1111/nan.12110] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 12/16/2013] [Indexed: 12/22/2022]
Affiliation(s)
- G. H. Petit
- Neuronal Survival Unit, Department of Experimental Medical Science Wallenberg Neuroscience Center Lund Sweden
| | - T. T. Olsson
- Van Andel Research Institute Center for Neurodegenerative Science Grand Rapids MI USA
| | - P. Brundin
- Neuronal Survival Unit, Department of Experimental Medical Science Wallenberg Neuroscience Center Lund Sweden
- Van Andel Research Institute Center for Neurodegenerative Science Grand Rapids MI USA
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Huang Y, Chang C, Zhang J, Gao X. Bone marrow-derived mesenchymal stem cells increase dopamine synthesis in the injured striatum. Neural Regen Res 2012; 7:2653-62. [PMID: 25337111 PMCID: PMC4200733 DOI: 10.3969/j.issn.1673-5374.2012.34.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 11/15/2012] [Indexed: 11/18/2022] Open
Abstract
Previous studies showed that tyrosine hydroxylase or neurturin gene-modified cells transplanted into rats with Parkinson’s disease significantly improved behavior and increased striatal dopamine content. In the present study, we transplanted tyrosine hydroxylase and neurturin gene-modified bone marrow-derived mesenchymal stem cells into the damaged striatum of Parkinson’s disease model rats. Several weeks after cell transplantation, in addition to an improvement of motor function, tyrosine hydroxylase and neurturin proteins were up-regulated in the injured striatum, and importantly, levels of dopamine and its metabolite 3,4-dihydroxyphenylacetic acid increased significantly. Furthermore, the density of the D2 dopamine receptor in the postsynaptic membranes of dopaminergic neurons was decreased. These results indicate that transplantation of tyrosine hydroxylase and neurturin gene-modified bone marrow-derived mesenchymal stem cells increases dopamine synthesis and significantly improves the behavior of rats with Parkinson’s disease.
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Affiliation(s)
- Yue Huang
- Department of Neurology, Henan Provincial People's Hospital, Zhengzhou 450003, Henan Province, China
| | - Cheng Chang
- Department of Anatomy, Zhengzhou University, Zhengzhou 450004, Henan Province, China
| | - Jiewen Zhang
- Department of Neurology, Henan Provincial People's Hospital, Zhengzhou 450003, Henan Province, China
| | - Xiaoqun Gao
- Department of Anatomy, Zhengzhou University, Zhengzhou 450004, Henan Province, China
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Lane EL, Winkler C. l-DOPA- and graft-induced dyskinesia following transplantation. PROGRESS IN BRAIN RESEARCH 2012. [DOI: 10.1016/b978-0-444-59575-1.00007-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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