Modeling Psychomotor Retardation using iPSCs from MCT8-Deficient Patients Indicates a Prominent Role for the Blood-Brain Barrier.
Cell Stem Cell
; 20(6): 831-843.e5, 2017 06 01.
Article
em En
| MEDLINE
| ID: mdl-28526555
ABSTRACT
Inactivating mutations in the thyroid hormone (TH) transporter Monocarboxylate transporter 8 (MCT8) cause severe psychomotor retardation in children. Animal models do not reflect the biology of the human disease. Using patient-specific induced pluripotent stem cells (iPSCs), we generated MCT8-deficient neural cells that showed normal TH-dependent neuronal properties and maturation. However, the blood-brain barrier (BBB) controls TH entry into the brain, and reduced TH availability to neural cells could instead underlie the diseased phenotype. To test potential BBB involvement, we generated an iPSC-based BBB model of MCT8 deficiency, and we found that MCT8 was necessary for polarized influx of the active form of TH across the BBB. We also found that a candidate drug did not appreciably cross the mutant BBB. Our results therefore clarify the underlying physiological basis of this disorder, and they suggest that circumventing the diseased BBB to deliver active TH to the brain could be a viable therapeutic strategy.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Transtornos Psicomotores
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Barreira Hematoencefálica
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Transportadores de Ácidos Monocarboxílicos
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Células-Tronco Pluripotentes Induzidas
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Neurônios
Limite:
Female
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Humans
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Male
Idioma:
En
Revista:
Cell Stem Cell
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Estados Unidos