| Autor: |
Arnold Munnich, Catherine Fossoud, Nathalie Lefort, Meral Topçu, Patrick Nitschke, Pierre David, Karthyayani Rajamani, Joseph G. Gleeson, Christine Bole-Feysot, Marie-Therese Vasilache-Dangles, Valentina Stanley, Nadia Bahi-Buisson, Miranda S. C. Wilson, Laurence Colleaux, Elsa Lorino, Nathalie Rabasse, Lydie Burglen, Gaele Pitelet, Adolfo Saiardi, Maha S. Zaki, Nami Altin, Fabienne Giuliano, Vincent Cantagrel, Giulia Barcia, Eric Bieth, Daniel Medina-Cano, Fatma Mujgan Sonmez, Damir Musaev, Nathalie Boddaert, Ekin Ucuncu |
| Rok vydání: |
2020 |
| Předmět: |
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| Popis: |
Inositol polyphosphates are vital metabolic and secondary messengers, involved in diverse cellular functions. Therefore, tight regulation of inositol polyphosphate metabolism is essential for proper cell physiology. Here, we describe an early-onset neurodegenerative syndrome caused by loss-of-function mutations in themultiple inositol polyphosphate phosphatase 1gene (MINPP1). Patients were found to have a distinct type of Pontocerebellar Hypoplasia with typical basal ganglia involvement on neuroimaging. We found that patient-derived and genome editedMINPP1-/-induced pluripotent stem cells (iPSCs) are not able to differentiate efficiently into neurons. MINPP1 deficiency results in an intracellular imbalance of the inositol polyphosphate metabolism. This metabolic defect is characterized by an accumulation of highly phosphorylated inositols, mostly inositol hexakiphosphate (IP6), detected in HEK293, fibroblasts, iPSCs and differentiating neurons lacking MINPP1. In mutant cells, higher IP6level is expected to be associated with an increased chelation of intracellular cations, such as iron or calcium, resulting in decreased levels of available ions. These data suggest the involvement of IP6-mediated chelation on Pontocerebellar Hypoplasia disease pathology and thereby highlight the critical role of MINPP1 in the regulation of human brain development and homeostasis. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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