Similar Datasets
Project description:Parkinson’s disease, an aging-associated neurodegenerative disorder, is characterised by nigrostriatal pathway dysfunction caused by the gradual loss of dopaminergic neurons in the substantia nigra pars compacta of the midbrain. Human in vitro models are enabling the study of the dopaminergic neurons’ loss, but not the dysregulation within the dopaminergic network in the nigrostriatal pathway. Additionally, these models do not incorporate aging characteristics which potentially contribute to the development of Parkinson’s disease. Here we present a nigrostriatal pathway model based on midbrain-striatum assembloids with inducible aging. We show that these assembloids can develop characteristics of the nigrostriatal connectivity, with catecholamine release from the midbrain to the striatum and synapse formation between midbrain and striatal neurons. Moreover, Progerin-overexpressing assembloids acquire aging traits that lead to early neurodegenerative phenotypes. This model shall help to reveal the contribution of aging as well as nigrostriatal connectivity to the onset and progression of Parkinson’s disease.
2023-10-28 | GSE241631 | GEO
Project description:Parkinson’s disease, an aging-associated neurodegenerative disorder, is characterised by nigrostriatal pathway dysfunction caused by the gradual loss of dopaminergic neurons in the substantia nigra pars compacta of the midbrain. Human in vitro models are enabling the study of the dopaminergic neurons’ loss, but not the dysregulation within the dopaminergic network in the nigrostriatal pathway. Additionally, these models do not incorporate aging characteristics which potentially contribute to the development of Parkinson’s disease. Here we present a nigrostriatal pathway model based on midbrain-striatum assembloids with inducible aging. We show that these assembloids can develop characteristics of the nigrostriatal connectivity, with catecholamine release from the midbrain to the striatum and synapse formation between midbrain and striatal neurons. Moreover, Progerin-overexpressing assembloids acquire aging traits that lead to early neurodegenerative phenotypes. This model shall help to reveal the contribution of aging as well as nigrostriatal connectivity to the onset and progression of Parkinson’s disease.
2023-10-28 | GSE236458 | GEO
Project description:Modeling early phenotypes of Parkinson’s disease by age-induced midbrain-striatum assembloids
| PRJNA1009011 | ENA
Project description:Modeling early phenotypes of Parkinson’s disease by age-induced midbrain-striatum assembloids [scRNA-Seq]
| PRJNA1009018 | ENA
Project description:Modeling early phenotypes of Parkinson’s disease by age-induced midbrain-striatum assembloids [RNA-Seq]
| PRJNA991423 | ENA
Project description:Ventral midbrain dopaminergic neurons project to the striatum as well as the cortex and are involved in movement control and reward-related cognition. In Parkinson's disease, nigrostriatal midbrain dopaminergic neurons degenerate and cause typical Parkinson's disease motor-related impairments, while the dysfunction of mesocorticolimbic midbrain dopaminergic neurons is implicated in addiction and neuropsychiatric disorders. Study of the development and selective neurodegeneration of the human dopaminergic system, however, has been limited due to the lack of an appropriate model and access to human material. Here, we have developed a human in vitro model that recapitulates key aspects of dopaminergic innervation of the striatum and cortex. These spatially arranged ventral midbrain-striatum-cortical organoids (MISCOs) can be used to study dopaminergic neuron maturation, innervation and function with implications for cell therapy and addiction research. We detail protocols for growing ventral midbrain, striatal and cortical organoids and describe how they fuse in a linear manner when placed in custom embedding molds. We report the formation of functional long-range dopaminergic connections to striatal and cortical tissues in MISCOs, and show that injected, ventral midbrain-patterned progenitors can mature and innervate the tissue. Using these assembloids, we examine dopaminergic circuit perturbations and show that chronic cocaine treatment causes long-lasting morphological, functional and transcriptional changes that persist upon drug withdrawal. Thus, our method opens new avenues to investigate human dopaminergic cell transplantation and circuitry reconstruction as well as the effect of drugs on the human dopaminergic system.
| S-EPMC10703680 | biostudies-literature
Project description:This SuperSeries is composed of the SubSeries listed below.
2023-09-20 | GSE219247 | GEO
Project description:Dopaminergic neurons located in the ventral Midbrain (vMid) innervate the striatum and cortex and are involved in movement control and reward-related cognition. Degeneration of dopaminergic neurons causes Parkinson’s disease (PD), while their over-activation is implicated in addiction. Thus, modeling the dopaminergic system is of broad relevance for disease research and drug discovery, although limited availability of patient material and inherent differences in animal model systems are restricting the study of distinctive human specific features such as development and neurodegeneration. Here, we show that spatially arranged assembloids can recapitulate dopaminergic innervation of striatum and cortex and offer methods for their use in cell replacement therapy and addiction research. We describe improved protocols for growing vMid, striatal and cortical organoids and use custom embedding molds to fuse them in a linear manner. Linear assembloids form functional long-range dopaminergic connections with striatal and cortical tissues that can release dopamine. We demonstrate that vMid grafts derived from hPSCs for cell replacement therapy of PD can integrate into the tissue and structurally mature. Additionally, we demonstrate that our model can be used to study dopaminergic circuit perturbations in the example of chronic cocaine treatment which causes morphological, functional and transcriptional changes that remained altered even after drug withdrawal. Our method opens new avenues for dopaminergic cell replacement therapy and the analysis of drugs affecting the dopaminergic system, directly in a human system.
2023-09-20 | GSE219245 | GEO
Project description:Dopaminergic neurons located in the ventral Midbrain (vMid) innervate the striatum and cortex and are involved in movement control and reward-related cognition. Degeneration of dopaminergic neurons causes Parkinson’s disease (PD), while their over-activation is implicated in addiction. Thus, modeling the dopaminergic system is of broad relevance for disease research and drug discovery, although limited availability of patient material and inherent differences in animal model systems are restricting the study of distinctive human specific features such as development and neurodegeneration. Here, we show that spatially arranged assembloids can recapitulate dopaminergic innervation of striatum and cortex and offer methods for their use in cell replacement therapy and addiction research. We describe improved protocols for growing vMid, striatal and cortical organoids and use custom embedding molds to fuse them in a linear manner. Linear assembloids form functional long-range dopaminergic connections with striatal and cortical tissues that can release dopamine. We demonstrate that vMid grafts derived from hPSCs for cell replacement therapy of PD can integrate into the tissue and structurally mature. Additionally, we demonstrate that our model can be used to study dopaminergic circuit perturbations in the example of chronic cocaine treatment which causes morphological, functional and transcriptional changes that remained altered even after drug withdrawal. Our method opens new avenues for dopaminergic cell replacement therapy and the analysis of drugs affecting the dopaminergic system, directly in a human system.
2023-09-20 | GSE219246 | GEO
Project description:Abstract Mutations in the leucine-rich repeat kinase 2 (LRRK2) gene are associated with familial and sporadic forms of Parkinson’s disease (PD). Sporadic PD and LRRK2 PD share main clinical and neuropathological features, namely hypokinesia, degeneration of nigro-striatal dopamine neurons and α-synuclein aggregates in the form of Lewy bodies. Animals harboring the most common LRRK2 mutations, i.e. p.G2019S and p.R1441C/G, have been generated to replicate the parkinsonian phenotype and investigate the underlying pathogenic mechanisms. Disappointingly, however, LRRK2 rodents did not consistently phenocopy hypokinesia and nigro-striatal degeneration, or showed Lewy body-like aggregates. Instead, LRRK2 rodents manifested non-motor signs and dysregulated transmission at dopaminergic and non-dopaminergic synapses that are reminiscent of behavioral and functional network changes observed in the prodromal phase of the disease. LRRK2 rodents also manifested greater susceptibility to different parkinsonian toxins or stressors when subjected to dual-hit or multiple-hit protocols, confirming LRRK2 mutations as genetic risk factors. In conclusion, LRRK2 rodents represent a unique tool to identify the molecular mechanisms through which LRRK2 modulates the course and clinical presentations of PD and to study the interplay between genetic, intrinsic and environmental protective/risk factors in PD pathogenesis.
| S-EPMC10432857 | biostudies-literature