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Increased Calcium Influx through L-type Calcium Channels in Human and Mouse Neural Progenitors Lacking Fragile X Mental Retardation Protein
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- Danesi, Claudia (author)
- Univ Helsinki, Fac Med, Physiol, POB 63, FIN-00014 Helsinki, Finland
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- Achuta, Venkat Swaroop (author)
- Univ Helsinki, Fac Med, Physiol, POB 63, FIN-00014 Helsinki, Finland
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- Corcoran, Pádraic (author)
- Uppsala universitet,Institutionen för medicinska vetenskaper
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- Elsevier BV, 2018
- 2018
- English.
- In: Stem Cell Reports. - : Elsevier BV. - 2213-6711. ; 11:6, s. 1449-1461
- Journal article (peer-reviewed)
Abstract
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- The absence of FMR1 protein (FMRP) causes fragile X syndrome (FXS) and disturbed FMRP function is implicated in several forms of human psychopathology. We show that intracellular calcium responses to depolarization are augmented in neural progenitors derived from human induced pluripotent stem cells and mouse brain with FXS. Increased calcium influx via nifedipine-sensitive voltage-gated calcium (Ca-v) channels contributes to the exaggerated responses to depolarization and type 1 metabotropic glutamate receptor activation. The ratio of L-type/T-type Ca-v channel expression is increased in FXS progenitors and correlates with enhanced progenitor differentiation to glutamate-responsive cells. Genetic reduction of brain-derived neurotrophic factor in FXS mouse progenitors diminishes the expression of Ca-v channels and activity-dependent responses, which are associated with increased phosphorylation of the phospholipase C-gamma 1 site within TrkB receptors and changes of differentiating progenitor subpopulations. Our results show developmental effects of increased calcium influx via L-type Ca-v channels in FXS neural progenitors.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Cell- och molekylärbiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Cell and Molecular Biology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Neurovetenskaper (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Neurosciences (hsv//eng)
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