26 results on '"Bruzelius, Andreas"'
Search Results
2. Author Correction: Single-cell transcriptomics captures features of human midbrain development and dopamine neuron diversity in brain organoids
- Author
-
Fiorenzano, Alessandro, Sozzi, Edoardo, Birtele, Marcella, Kajtez, Janko, Giacomoni, Jessica, Nilsson, Fredrik, Bruzelius, Andreas, Sharma, Yogita, Zhang, Yu, Mattsson, Bengt, Emnéus, Jenny, Ottosson, Daniella Rylander, Storm, Petter, and Parmar, Malin
- Published
- 2022
- Full Text
- View/download PDF
3. Direct Reprogramming of Human Fetal- and Stem Cell-Derived Glial Progenitor Cells into Midbrain Dopaminergic Neurons
- Author
-
Nolbrant, Sara, Giacomoni, Jessica, Hoban, Deirdre B., Bruzelius, Andreas, Birtele, Marcella, Chandler-Militello, Devin, Pereira, Maria, Ottosson, Daniella Rylander, Goldman, Steven A., and Parmar, Malin
- Published
- 2020
- Full Text
- View/download PDF
4. Astrocyte dysfunction and neuronal network hyperactivity in a CRISPR engineered pluripotent stem cell model of frontotemporal dementia
- Author
-
Swedish Society for Medical Research, Swedish Research Council, Swedish Alzheimer Foundation, Agencia Estatal de Investigación (España), Ministerio de Ciencia e Innovación (España), European Commission, Canals, Isaac [0000-0002-2689-268X], Comella Bolla, Andrea [0000-0001-9480-5050], Cepeda-Prado, E. [0000-0001-9781-3742], Avaliani, Natalia [0000-0002-2986-1520], Crowe, James A. [0000-0003-4487-9048], Oburoglu, Leal [0000-0003-0130-6602], Bruzelius, Andreas [0000-0002-7175-3590], Pajares, María A. [0000-0002-4714-9051], Pérez-Sala, Dolores [0000-0003-0600-665X], Heuer, Andreas [0000-0003-0300-7606], Rylander Ottosson, Daniella [0000-0002-9270-3576], Soriano, Jordi [0000-0003-2676-815X], Ahlenius, Henrik [0000-0001-8958-6148], Canals, Isaac, Comella Bolla, Andrea, Cepeda-Prado, E., Avaliani, Natalia, Crowe, James A., Oburoglu, Leal, Bruzelius, Andreas, King, Naomi, Pajares, María A., Pérez-Sala, Dolores, Heuer, Andreas, Rylander Ottosson, Daniella, Soriano, Jordi, Ahlenius, Henrik, Swedish Society for Medical Research, Swedish Research Council, Swedish Alzheimer Foundation, Agencia Estatal de Investigación (España), Ministerio de Ciencia e Innovación (España), European Commission, Canals, Isaac [0000-0002-2689-268X], Comella Bolla, Andrea [0000-0001-9480-5050], Cepeda-Prado, E. [0000-0001-9781-3742], Avaliani, Natalia [0000-0002-2986-1520], Crowe, James A. [0000-0003-4487-9048], Oburoglu, Leal [0000-0003-0130-6602], Bruzelius, Andreas [0000-0002-7175-3590], Pajares, María A. [0000-0002-4714-9051], Pérez-Sala, Dolores [0000-0003-0600-665X], Heuer, Andreas [0000-0003-0300-7606], Rylander Ottosson, Daniella [0000-0002-9270-3576], Soriano, Jordi [0000-0003-2676-815X], Ahlenius, Henrik [0000-0001-8958-6148], Canals, Isaac, Comella Bolla, Andrea, Cepeda-Prado, E., Avaliani, Natalia, Crowe, James A., Oburoglu, Leal, Bruzelius, Andreas, King, Naomi, Pajares, María A., Pérez-Sala, Dolores, Heuer, Andreas, Rylander Ottosson, Daniella, Soriano, Jordi, and Ahlenius, Henrik
- Abstract
Frontotemporal dementia is the second most prevalent type of early-onset dementia and up to 40% of cases are familial forms. One of the genes mutated in patients is CHMP2B, which encodes a protein found in a complex important for maturation of late endosomes, an essential process for recycling membrane proteins through the endolysosomal system. Here, we have generated a CHMP2B-mutated human embryonic stem cell line using genome editing with the purpose to create a human in vitro Frontotemporal dementia disease model. To date, most studies have focused on neuronal alterations; however, we present a new co-culture system in which neurons and astrocytes are independently generated from human embryonic stem cells and combined in co-cultures. With this approach, we have identified alterations in the endolysosomal system of Frontotemporal dementia astrocytes, a higher capacity of astrocytes to uptake and respond to glutamate, and a neuronal network hyperactivity as well as excessive synchronization. Overall, our data indicates that astrocyte alterations precede neuronal impairments and could potentially trigger neuronal network changes, indicating the important and specific role of astrocytes in disease development.
- Published
- 2023
5. Single-cell transcriptomics captures features of human midbrain development and dopamine neuron diversity in brain organoids
- Author
-
Fiorenzano, Alessandro, Sozzi, Edoardo, Birtele, Marcella, Kajtez, Janko, Giacomoni, Jessica, Nilsson, Fredrik, Bruzelius, Andreas, Sharma, Yogita, Zhang, Yu, Mattsson, Bengt, Emnéus, Jenny, Ottosson, Daniella Rylander, Storm, Petter, and Parmar, Malin
- Published
- 2021
- Full Text
- View/download PDF
6. Injectable 3D microcultures enable intracerebral transplantation of mature neurons directly reprogrammed from patient fibroblasts
- Author
-
Kajtez, Janko, primary, Nilsson, Fredrik, additional, Laurin, Kerstin, additional, Bruzelius, Andreas, additional, Cepeda-Prado, Efrain, additional, Birtele, Marcella, additional, Barker, Roger A, additional, Herborg, Freja, additional, Ottosson, Daniella Rylander, additional, Storm, Petter, additional, Fiorenzano, Alessandro, additional, Habekost, Mette, additional, and Parmar, Malin, additional
- Published
- 2023
- Full Text
- View/download PDF
7. 3D model for human glia conversion into subtype-specific neurons, including dopamine neurons
- Author
-
Giacomoni, Jessica, Bruzelius, Andreas, Habekost, Mette, Kajtez, Janko, Ottosson, Daniella Rylander, Fiorenzano, Alessandro, Storm, Petter, and Parmar, Malin
- Published
- 2024
- Full Text
- View/download PDF
8. Astrocyte dysfunction and neuronal network hyperactivity in a CRISPR engineered pluripotent stem cell model of frontotemporal dementia
- Author
-
Canals, Isaac, primary, Comella-Bolla, Andrea, additional, Cepeda-Prado, Efrain, additional, Avaliani, Natalia, additional, Crowe, James A, additional, Oburoglu, Leal, additional, Bruzelius, Andreas, additional, King, Naomi, additional, Pajares, María A, additional, Pérez-Sala, Dolores, additional, Heuer, Andreas, additional, Rylander Ottosson, Daniella, additional, Soriano, Jordi, additional, and Ahlenius, Henrik, additional
- Published
- 2023
- Full Text
- View/download PDF
9. Silk scaffolding drives self-assembly of functional and mature human brain organoids
- Author
-
Sozzi, Edoardo, primary, Kajtez, Janko, additional, Bruzelius, Andreas, additional, Wesseler, Milan Finn, additional, Nilsson, Fredrik, additional, Birtele, Marcella, additional, Larsen, Niels B., additional, Ottosson, Daniella Rylander, additional, Storm, Petter, additional, Parmar, Malin, additional, and Fiorenzano, Alessandro, additional
- Published
- 2022
- Full Text
- View/download PDF
10. Reprogramming Human Adult Fibroblasts into GABAergic Interneurons
- Author
-
Bruzelius, Andreas, Kidnapillai, Srisaiyini, Drouin-Ouellet, Janelle, Stoker, Tom, Barker, Roger A, Rylander Ottosson, Daniella, Bruzelius, Andreas [0000-0002-7175-3590], Stoker, Tom [0000-0001-5186-7630], Barker, Roger [0000-0001-8843-7730], Rylander Ottosson, Daniella [0000-0002-9270-3576], Apollo - University of Cambridge Repository, and Barker, Roger A [0000-0001-8843-7730]
- Subjects
Adult ,QH301-705.5 ,Neurogenesis ,iN ,Article ,neuronal conversion ,Interneurons ,calbindin ,Humans ,Cognitive Dysfunction ,Biology (General) ,GABAergic Neurons ,disease-modelling ,gamma-Aminobutyric Acid ,Skin ,Brain Diseases ,Cambridge Stem Cell Institute ,Cell Differentiation ,Fibroblasts ,Cellular Reprogramming ,electrophysiology ,direct reprogramming ,Repressor Proteins ,nervous system ,Gene Expression Regulation ,adult skin cells ,Neuroglia - Abstract
Direct reprogramming is an appealing strategy to generate neurons from a somatic cell by forced expression of transcription factors. The generated neurons can be used for both cell replacement strategies and disease modelling. Using this technique, previous studies have shown that ��-aminobutyric acid (GABA) expressing interneurons can be generated from different cell sources, such as glia cells or fetal fibroblasts. Nevertheless, the generation of neurons from adult human fibroblasts, an easily accessible cell source to obtain patient-derived neurons, has proved to be challenging due to the intrinsic blockade of neuronal commitment. In this paper, we used an optimized protocol for adult skin fibroblast reprogramming based on RE1 Silencing Transcription Factor (REST) inhibition together with a combination of GABAergic fate determinants to convert human adult skin fibroblasts into GABAergic neurons. Our results show a successful conversion in 25 days with upregulation of neuronal gene and protein expression levels. Moreover, we identified specific gene combinations that converted fibroblasts into neurons of a GABAergic interneuronal fate. Despite the well-known difficulty in converting adult fibroblasts into functional neurons in vitro, we could detect functional maturation in the induced neurons. GABAergic interneurons have relevance for cognitive impairments and brain disorders, such as Alzheimer's and Parkinson's diseases, epilepsy, schizophrenia and autism spectrum disorders.
- Published
- 2021
11. Silk scaffolding drives self-assembly of functional and mature human brain organoids
- Author
-
Sozzi, Edoardo, Kajtez, Janko, Bruzelius, Andreas, Wesseler, Milan Finn, Nilsson, Fredrik, Birtele, Marcella, Larsen, Niels B., Ottosson, Daniella Rylander, Storm, Petter, Parmar, Malin, Fiorenzano, Alessandro, Sozzi, Edoardo, Kajtez, Janko, Bruzelius, Andreas, Wesseler, Milan Finn, Nilsson, Fredrik, Birtele, Marcella, Larsen, Niels B., Ottosson, Daniella Rylander, Storm, Petter, Parmar, Malin, and Fiorenzano, Alessandro
- Abstract
Human pluripotent stem cells (hPSCs) are intrinsically able to self-organize into cerebral organoids that mimic features of developing human brain tissue. These three-dimensional structures provide a unique opportunity to generate cytoarchitecture and cell-cell interactions reminiscent of human brain complexity in a dish. However, current in vitro brain organoid methodologies often result in intra-organoid variability, limiting their use in recapitulating later developmental stages as well as in disease modeling and drug discovery. In addition, cell stress and hypoxia resulting from long-term culture lead to incomplete maturation and cell death within the inner core. Here, we used a recombinant silk microfiber network as a scaffold to drive hPSCs to self-arrange into engineered cerebral organoids. Silk scaffolding promoted neuroectoderm formation and reduced heterogeneity of cellular organization within individual organoids. Bulk and single cell transcriptomics confirmed that silk cerebral organoids display more homogeneous and functionally mature neuronal properties than organoids grown in the absence of silk scaffold. Furthermore, oxygen sensing analysis showed that silk scaffolds create more favorable growth and differentiation conditions by facilitating the delivery of oxygen and nutrients. The silk scaffolding strategy appears to reduce intra-organoid variability and enhances self-organization into functionally mature human brain organoids.
- Published
- 2022
12. Grafts Derived from an α-Synuclein Triplication Patient Mediate Functional Recovery but Develop Disease-Associated Pathology in the 6-OHDA Model of Parkinson's Disease
- Author
-
Shrigley, Shelby, Nilsson, Fredrik, Mattsson, Bengt, Fiorenzano, Alessandro, Mudannayake, Janitha, Bruzelius, Andreas, Ottosson, Daniella Rylander, Björklund, Anders, Hoban, Deirdre B, Parmar, Malin, Shrigley, Shelby, Nilsson, Fredrik, Mattsson, Bengt, Fiorenzano, Alessandro, Mudannayake, Janitha, Bruzelius, Andreas, Ottosson, Daniella Rylander, Björklund, Anders, Hoban, Deirdre B, and Parmar, Malin
- Abstract
BACKGROUND: Human induced pluripotent stem cells (hiPSCs) have been proposed as an alternative source for cell replacement therapy for Parkinson's disease (PD) and they provide the option of using the patient's own cells. A few studies have investigated transplantation of patient-derived dopaminergic (DA) neurons in preclinical models; however, little is known about the long-term integrity and function of grafts derived from patients with PD.OBJECTIVE: To assess the viability and function of DA neuron grafts derived from a patient hiPSC line with an α-synuclein gene triplication (AST18), using a clinical grade human embryonic stem cell (hESC) line (RC17) as a reference control.METHODS: Cells were differentiated into ventral mesencephalic (VM)-patterned DA progenitors using an established GMP protocol. The progenitors were then either terminally differentiated to mature DA neurons in vitro or transplanted into 6-hydroxydopamine (6-OHDA) lesioned rats and their survival, maturation, function, and propensity to develop α-synuclein related pathology, were assessed in vivo.RESULTS: Both cell lines generated functional neurons with DA properties in vitro. AST18-derived VM progenitor cells survived transplantation and matured into neuron-rich grafts similar to the RC17 cells. After 24 weeks, both cell lines produced DA-rich grafts that mediated full functional recovery; however, pathological changes were only observed in grafts derived from the α-synuclein triplication patient line.CONCLUSION: This data shows proof-of-principle for survival and functional recovery with familial PD patient-derived cells in the 6-OHDA model of PD. However, signs of slowly developing pathology warrants further investigation before use of autologous grafts in patients.
- Published
- 2021
13. The human bone marrow harbors a CD45− CD11B+ cell progenitor permitting rapid microglia-like cell derivative approaches
- Author
-
Universidad de Sevilla. Departamento de Bioquímica y Biología Molecular, Bruzelius, Andreas, Hidalgo, Isabel, Boza Serrano, Antonio, Hjelmér, Anna Giorgia, Tison, Amelie, Deierborg, Tomas, Bengzon, Johan, Ramos Moreno, Tania, Universidad de Sevilla. Departamento de Bioquímica y Biología Molecular, Bruzelius, Andreas, Hidalgo, Isabel, Boza Serrano, Antonio, Hjelmér, Anna Giorgia, Tison, Amelie, Deierborg, Tomas, Bengzon, Johan, and Ramos Moreno, Tania
- Abstract
Microglia, the immune sentinel of the central nervous system (CNS), are generated from yolk sac erythromyeloid progenitors that populate the developing CNS. Interestingly, a specific type of bone marrow-derived monocyte is able to express a yolk sac microglial signature and populate CNS in disease. Here we have examined human bone marrow (hBM) in an attempt to identify novel cell sources for generating microglia-like cells to use in cell-based therapies and in vitro modeling. We demonstrate that hBM stroma harbors a progenitor cell that we name stromal microglial progenitor (STR-MP). STR-MP single-cell gene analysis revealed the expression of the consensus genetic microglial signature and microglial-specific genes present in development and CNS pathologies. STR-MPs can be expanded and generate microglia-like cells in vitro, which we name stromal microglia (STR-M). STR-M cells show phagocytic ability, classically activate, and survive and phagocyte in human brain tissue. Thus, our results reveal that hBM harbors a source of microglia-like precursors that can be used in patient-centered fast derivative approaches.
- Published
- 2021
14. The human bone marrow harbors a CD45− CD11B+ cell progenitor permitting rapid microglia-like cell derivative approaches
- Author
-
Royal Physiographic Society of Lund, Crafoord Foundation, Per-Eric and Ulla Schyberg's Foundation, Bruzelius, Andreas, Hidalgo, Isabel, Boza-Serrano, Antonio, Hjelmér, Anna-Giorgia, Tison, Amelie, Deierborg, Tomas, Bengzon, Johan, Ramos-Moreno, Tania, Royal Physiographic Society of Lund, Crafoord Foundation, Per-Eric and Ulla Schyberg's Foundation, Bruzelius, Andreas, Hidalgo, Isabel, Boza-Serrano, Antonio, Hjelmér, Anna-Giorgia, Tison, Amelie, Deierborg, Tomas, Bengzon, Johan, and Ramos-Moreno, Tania
- Abstract
Microglia, the immune sentinel of the central nervous system (CNS), are generated from yolk sac erythromyeloid progenitors that populate the developing CNS. Interestingly, a specific type of bone marrow-derived monocyte is able to express a yolk sac microglial signature and populate CNS in disease. Here we have examined human bone marrow (hBM) in an attempt to identify novel cell sources for generating microglia-like cells to use in cell-based therapies and in vitro modeling. We demonstrate that hBM stroma harbors a progenitor cell that we name stromal microglial progenitor (STR-MP). STR-MP single-cell gene analysis revealed the expression of the consensus genetic microglial signature and microglial-specific genes present in development and CNS pathologies. STR-MPs can be expanded and generate microglia-like cells in vitro, which we name stromal microglia (STR-M). STR-M cells show phagocytic ability, classically activate, and survive and phagocyte in human brain tissue. Thus, our results reveal that hBM harbors a source of microglia-like precursors that can be used in patient-centered fast derivative approaches.
- Published
- 2021
15. Grafts Derived from an α-Synuclein Triplication Patient Mediate Functional Recovery but Develop Disease-Associated Pathology in the 6-OHDA Model of Parkinson’s Disease
- Author
-
Shrigley, Shelby, primary, Nilsson, Fredrik, additional, Mattsson, Bengt, additional, Fiorenzano, Alessandro, additional, Mudannayake, Janitha, additional, Bruzelius, Andreas, additional, Ottosson, Daniella Rylander, additional, Björklund, Anders, additional, Hoban, Deirdre B., additional, and Parmar, Malin, additional
- Published
- 2021
- Full Text
- View/download PDF
16. The human bone marrow harbors a CD45− CD11B+ cell progenitor permitting rapid microglia-like cell derivative approaches
- Author
-
Bruzelius, Andreas, primary, Hidalgo, Isabel, additional, Boza-Serrano, Antonio, additional, Hjelmér, Anna-Giorgia, additional, Tison, Amelie, additional, Deierborg, Tomas, additional, Bengzon, Johan, additional, and Ramos-Moreno, Tania, additional
- Published
- 2020
- Full Text
- View/download PDF
17. Direct Conversion of Human Stem Cell-Derived Glial Progenitor Cells into GABAergic Interneurons
- Author
-
Giacomoni, Jessica, primary, Bruzelius, Andreas, additional, Stamouli, Christina-Anastasia, additional, and Rylander Ottosson, Daniella, additional
- Published
- 2020
- Full Text
- View/download PDF
18. The human bone marrow harbors a CD45− CD11B+ cell progenitor permitting rapid microglia‐like cell derivative approaches.
- Author
-
Bruzelius, Andreas, Hidalgo, Isabel, Boza‐Serrano, Antonio, Hjelmér, Anna‐Giorgia, Tison, Amelie, Deierborg, Tomas, Bengzon, Johan, and Ramos‐Moreno, Tania
- Published
- 2021
- Full Text
- View/download PDF
19. The human bone marrow harbors a CD45−CD11B+cell progenitor permitting rapid microglia‐like cell derivative approaches
- Author
-
Bruzelius, Andreas, Hidalgo, Isabel, Boza‐Serrano, Antonio, Hjelmér, Anna‐Giorgia, Tison, Amelie, Deierborg, Tomas, Bengzon, Johan, and Ramos‐Moreno, Tania
- Abstract
Microglia, the immune sentinel of the central nervous system (CNS), are generated from yolk sac erythromyeloid progenitors that populate the developing CNS. Interestingly, a specific type of bone marrow‐derived monocyte is able to express a yolk sac microglial signature and populate CNS in disease. Here we have examined human bone marrow (hBM) in an attempt to identify novel cell sources for generating microglia‐like cells to use in cell‐based therapies and in vitro modeling. We demonstrate that hBM stroma harbors a progenitor cell that we name stromal microglial progenitor (STR‐MP). STR‐MP single‐cell gene analysis revealed the expression of the consensus genetic microglial signature and microglial‐specific genes present in development and CNS pathologies. STR‐MPs can be expanded and generate microglia‐like cells in vitro, which we name stromal microglia (STR‐M). STR‐M cells show phagocytic ability, classically activate, and survive and phagocyte in human brain tissue. Thus, our results reveal that hBM harbors a source of microglia‐like precursors that can be used in patient‐centered fast derivative approaches.
- Published
- 2021
- Full Text
- View/download PDF
20. Det digitaliserade servicemötet - en studie av relation och självservice
- Author
-
Bruzelius, Andreas, Hallenheim, Ola, Bruzelius, Andreas, and Hallenheim, Ola
- Abstract
Ämne: Magisteruppsats, 10p, Institutionen för Service Management, Lunds universitet Författare: Andreas Bruzelius, Ola Hallenheim Handledare: Carl R Hellberg, Pia Siljeklint Problemdiskussion: Den forskning som främst återges i service managementlitteraturen bygger på att människor träffas i ett servicemöte där frontpersonalen ”levererar” service. Ofta betonas frontpersonalens stora roll som deltidsmarknadsförare och de stora resurser som tjänsteföretag bör lägga på att stödja frontpersonalen för att servicemöten skall bli lyckade och skapa värde för såväl företag som kund. I takt med att den tekniska utvecklingen går framåt kommer självservice sannolikt att öka och fler tjänster kommer att fungera utan det traditionella servicemötet. Hur påverkas kundrelationer, kundvärdet och lojaliteten gentemot serviceföretaget när servicemötet förändras? Hur kan företag använda sig av självservice för att skapa konkurrensfördelar? Syfte: Syftet är att beskriva och analysera hur tjänstemötet och kundrelationen påverkas av en utökad grad av självservice, främst via Internet. Metod: En kvalitativ metod har används, djupintervjuer med representanter för de ingående företagen, Svenska Handelsbanken, Swedbank och Inwarehouse. Vårt angreppssätt har varit att ställa teori gentemot vårt empiriska material för att därefter kunna dra de nödvändiga slutsatserna för att kunna svara på våra frågeställningar. Slutsatser: Relationernas betydelse har inte minskat på grund av självservicens utbredning. Lojaliteten minskar däremot om de personliga relationerna inte prioriteras. En kombination som bygger på en god relation kompletterat med sjlvservice för rutintjänster är nyckeln till att kunna skapa konkurrensfördelar.
- Published
- 2007
21. Gör gästen en tjänst (?) En studie av gästinvolverad tjänsteutveckling i hotellbranschen
- Author
-
Bruzelius, Andreas, Hallenheim, Ola, Dahlskog, Petter, Bruzelius, Andreas, Hallenheim, Ola, and Dahlskog, Petter
- Abstract
Problemdiskussion: Inom Service Managementforskningen betonas kundens mycket stora betydelse. Som tjänsteleverantör skall man vårda sina kundrelationer, och för att skapa en varaktig relation krävs att tjänsten som erbjuds upplevs som konkurrenskraftig och svarar till kundens förväntningar. Kundens viktiga roll som medproducent av tjänster är ett faktum inom tjänsteforskningen. Dock verkar inte samma förhållande gälla för kundens medverkan vid tjänsteutveckling, studier visar att kundens medverkan är mindre vid tjänsteutveckling än vid produktutveckling. Men hur fungerar kunddialogen? Driver kunderna tjänsteutvecklingen framåt? I vilken grad är kunden delaktig i affärsutvecklingen, är det kunden som är utgångspunkt för utvecklingen eller finns det andra faktorer som är viktigare? Syfte: Syftet är att beskriva och analysera hur hotellföretag involverar sina gäster i tjänsteutvecklingen. Fokus ligger på att belysa de eventuella kritiska faktorer som kan hämma gästinvolvering vid tjänsteutveckling. Metod: Metoden är utpräglat kvalitativ, framförallt djupintervjuer med representanter från internationella hotellkedjor kompletterat med data från hotellens kunddialogarbete. Slutsatser: Kundinvolvering i hotellbranschen förekommer framförallt genom de undersökningar som görs. Dock är det sällan så att den enskilde gästens synpunkter tas tillvara, bra system för att hantera önskemål saknas. Hotellkedjorna dras med en stelhet och den hierarkiska strukturen i kombination med standardisering innebär att enkla förändringar tar onödigt lång tid. Hotellbranschens uppdelning med operatörer och fastighetsägare är också en försvårande omständighet för gästinvolverad tjänsteutveckling.
- Published
- 2006
22. Grafts Derived from an α-Synuclein Triplication Patient Mediate Functional Recovery but Develop Disease-Associated Pathology in the 6-OHDA Model of Parkinson’s Disease
- Author
-
Shrigley, Shelby, Nilsson, Fredrik, Mattsson, Bengt, Fiorenzano, Alessandro, Mudannayake, Janitha, Bruzelius, Andreas, Ottosson, Daniella Rylander, Björklund, Anders, Hoban, Deirdre B, and Parmar, Malin
- Subjects
Neurosciences - Abstract
BACKGROUND: Human induced pluripotent stem cells (hiPSCs) have been proposed as an alternative source for cell replacement therapy for Parkinson's disease (PD) and they provide the option of using the patient's own cells. A few studies have investigated transplantation of patient-derived dopaminergic (DA) neurons in preclinical models; however, little is known about the long-term integrity and function of grafts derived from patients with PD.OBJECTIVE: To assess the viability and function of DA neuron grafts derived from a patient hiPSC line with an α-synuclein gene triplication (AST18), using a clinical grade human embryonic stem cell (hESC) line (RC17) as a reference control.METHODS: Cells were differentiated into ventral mesencephalic (VM)-patterned DA progenitors using an established GMP protocol. The progenitors were then either terminally differentiated to mature DA neurons in vitro or transplanted into 6-hydroxydopamine (6-OHDA) lesioned rats and their survival, maturation, function, and propensity to develop α-synuclein related pathology, were assessed in vivo.RESULTS: Both cell lines generated functional neurons with DA properties in vitro. AST18-derived VM progenitor cells survived transplantation and matured into neuron-rich grafts similar to the RC17 cells. After 24 weeks, both cell lines produced DA-rich grafts that mediated full functional recovery; however, pathological changes were only observed in grafts derived from the α-synuclein triplication patient line.CONCLUSION: This data shows proof-of-principle for survival and functional recovery with familial PD patient-derived cells in the 6-OHDA model of PD. However, signs of slowly developing pathology warrants further investigation before use of autologous grafts in patients.
- Full Text
- View/download PDF
23. Silk scaffolding drives self-assembly of functional and mature human brain organoids
- Author
-
Sozzi, Edoardo, Kajtez, Janko, Bruzelius, Andreas, Wesseler, Milan Finn, Nilsson, Fredrik, Birtele, Marcella, Larsen, Niels B., Ottosson, Daniella Rylander, Storm, Petter, Parmar, Malin, and Fiorenzano, Alessandro
- Subjects
Cerebral organoid ,Silk scaffolding ,SDG 3 - Good Health and Well-being ,Human pluripotent stem cells ,Tissue engineering ,Oxygen sensing - Abstract
Human pluripotent stem cells (hPSCs) are intrinsically able to self-organize into cerebral organoids that mimic features of developing human brain tissue. These three-dimensional structures provide a unique opportunity to generate cytoarchitecture and cell-cell interactions reminiscent of human brain complexity in a dish. However, current in vitro brain organoid methodologies often result in intra-organoid variability, limiting their use in recapitulating later developmental stages as well as in disease modeling and drug discovery. In addition, cell stress and hypoxia resulting from long-term culture lead to incomplete maturation and cell death within the inner core. Here, we used a recombinant silk microfiber network as a scaffold to drive hPSCs to self-arrange into engineered cerebral organoids. Silk scaffolding promoted neuroectoderm formation and reduced heterogeneity of cellular organization within individual organoids. Bulk and single cell transcriptomics confirmed that silk cerebral organoids display more homogeneous and functionally mature neuronal properties than organoids grown in the absence of silk scaffold. Furthermore, oxygen sensing analysis showed that silk scaffolds create more favorable growth and differentiation conditions by facilitating the delivery of oxygen and nutrients. The silk scaffolding strategy appears to reduce intra-organoid variability and enhances self-organization into functionally mature human brain organoids.
- Full Text
- View/download PDF
24. Astrocyte dysfunction and neuronal network hyperactivity in a CRISPR engineered pluripotent stem cell model of frontotemporal dementia
- Author
-
Isaac Canals, Andrea Comella-Bolla, Efrain Cepeda-Prado, Natalia Avaliani, James A Crowe, Leal Oburoglu, Andreas Bruzelius, Naomi King, María A Pajares, Dolores Pérez-Sala, Andreas Heuer, Daniella Rylander Ottosson, Jordi Soriano, Henrik Ahlenius, Swedish Society for Medical Research, Swedish Research Council, Swedish Alzheimer Foundation, Agencia Estatal de Investigación (España), Ministerio de Ciencia e Innovación (España), European Commission, Canals, Isaac, Comella Bolla, Andrea, Cepeda-Prado, E., Avaliani, Natalia, Crowe, James A., Oburoglu, Leal, Bruzelius, Andreas, Pajares, María A., Pérez-Sala, Dolores, Heuer, Andreas, Rylander Ottosson, Daniella, Soriano, Jordi, and Ahlenius, Henrik
- Subjects
CRISPR/Cas9 genome editing ,Astròcits ,Stem cells ,Electrophysiology ,Cellular and Molecular Neuroscience ,Psychiatry and Mental health ,Neuronal network analysis ,Neurology ,Astrocytes ,Human pluripotent stem cells ,Electrofisiologia ,Cèl·lules mare ,Biological Psychiatry ,Frontotemporal dementia - Abstract
31p.-7 fig. 1 graph. abst., Frontotemporal dementia is the second most prevalent type of early-onset dementia and up to 40% of cases are familial forms. One of the genes mutated in patients is CHMP2B, which encodes a protein found in a complex important for maturation of late endosomes, an essential process for recycling membrane proteins through the endolysosomal system. Here, we have generated a CHMP2B-mutated human embryonic stem cell line using genome editing with the purpose to create a human in vitro Frontotemporal dementia disease model. To date, most studies have focused on neuronal alterations; however, we present a new co-culture system in which neurons and astrocytes are independently generated from human embryonic stem cells and combined in co-cultures. With this approach, we have identified alterations in the endolysosomal system of Frontotemporal dementia astrocytes, a higher capacity of astrocytes to uptake and respond to glutamate, and a neuronal network hyperactivity as well as excessive synchronization. Overall, our data indicates that astrocyte alterations precede neuronal impairments and could potentially trigger neuronal network changes, indicating the important and specific role of astrocytes in disease development., This study was supported by funding from the Swedish Society for Medical Research (SSMF, S20-0003), Kockska, Segerfalk and Hardebo foundations to IC; the Swedish Research Council (VR:2018-02695), Swedish Alzheimer and Åhlen foundations to HA; the Swedish Research Council (VR:2016-01789) to AH; and the Agencia Estatal de Investigación, Ministerio de Ciencia e Innovación (RTI2018-097624-BI00) and European Regional Development Fund to DPS.
- Published
- 2023
25. TARGET-seq: Linking single-cell transcriptomics of human dopaminergic neurons with their target specificity.
- Author
-
Fiorenzano A, Storm P, Sozzi E, Bruzelius A, Corsi S, Kajtez J, Mudannayake J, Nelander J, Mattsson B, Åkerblom M, Björklund T, Björklund A, and Parmar M
- Subjects
- Humans, Animals, Mice, Gene Expression Profiling methods, Prosencephalon metabolism, Prosencephalon cytology, Axons metabolism, Dopaminergic Neurons metabolism, Transcriptome, Single-Cell Analysis methods
- Abstract
Dopaminergic (DA) neurons exhibit significant diversity characterized by differences in morphology, anatomical location, axonal projection pattern, and selective vulnerability to disease. More recently, scRNAseq has been used to map DA neuron diversity at the level of gene expression. These studies have revealed a higher than expected molecular diversity in both mouse and human DA neurons. However, whether different molecular expression profiles correlate with specific functions of different DA neurons or with their classical division into mesolimbic (A10) and nigrostriatal (A9) neurons, remains to be determined. To address this, we have developed an approach termed TARGET-seq (Tagging projections by AAV-mediated RetroGrade Enrichment of Transcriptomes) that links the transcriptional profile of the DA neurons with their innervation of specific target structures in the forebrain. Leveraging this technology, we identify molecularly distinct subclusters of human DA neurons with a clear link between transcriptome and axonal target-specificity, offering the possibility to infer neuroanatomical-based classification to molecular identity and target-specific connectivity. We subsequently used this dataset to identify candidate transcription factors along DA developmental trajectories that may control subtype identity, thus providing broad avenues that can be further explored in the design of next-generation A9 and A10 enriched DA-neurons for drug screening or A9 enriched DA cells for clinical stem cell-based therapies., Competing Interests: Competing interests statement:Malin Parmar performs paid consultancy to Novo Nordisk A/S, Denmark. Tomas Björklund is founder and director of Brave Bioscience AB and co-founder and SAB member of Dyno Therapeutics. Malin Parmar is the owner of Parmar Cells that holds related ip (U.S. patent 15/093,927, PCT/EP17181588). Tomas Björklund is inventor of multiple patents related to gene therapy, founder and director of Brave Bioscience AB and co-founder and SAB member of Dyno Therapeutics.
- Published
- 2024
- Full Text
- View/download PDF
26. The human bone marrow harbors a CD45 - CD11B + cell progenitor permitting rapid microglia-like cell derivative approaches.
- Author
-
Bruzelius A, Hidalgo I, Boza-Serrano A, Hjelmér AG, Tison A, Deierborg T, Bengzon J, and Ramos-Moreno T
- Subjects
- CD11b Antigen, Central Nervous System, Humans, Leukocyte Common Antigens, Bone Marrow, Microglia cytology, Stem Cells cytology
- Abstract
Microglia, the immune sentinel of the central nervous system (CNS), are generated from yolk sac erythromyeloid progenitors that populate the developing CNS. Interestingly, a specific type of bone marrow-derived monocyte is able to express a yolk sac microglial signature and populate CNS in disease. Here we have examined human bone marrow (hBM) in an attempt to identify novel cell sources for generating microglia-like cells to use in cell-based therapies and in vitro modeling. We demonstrate that hBM stroma harbors a progenitor cell that we name stromal microglial progenitor (STR-MP). STR-MP single-cell gene analysis revealed the expression of the consensus genetic microglial signature and microglial-specific genes present in development and CNS pathologies. STR-MPs can be expanded and generate microglia-like cells in vitro, which we name stromal microglia (STR-M). STR-M cells show phagocytic ability, classically activate, and survive and phagocyte in human brain tissue. Thus, our results reveal that hBM harbors a source of microglia-like precursors that can be used in patient-centered fast derivative approaches., (© 2020 The Authors. STEM CELLS TRANSLATIONAL MEDICINE published by Wiley Periodicals LLC on behalf of AlphaMed Press.)
- Published
- 2021
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.