A calcium message for Niemann-Pick type C

Cologna, Stephanie M.

doi:10.1083/jcb.201911021

Journal of Cell Biology

2019

DOI: 10.1083/jcb.201911021

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A calcium message for Niemann-Pick type C

Stephanie M. Cologna

Abstract: Calcium is a ubiquitous secondary messenger that is critical for cellular function. In the highlighted article, Tiscione et al. (2019. J. Cell. Biol. https://doi.org/10.1083/jcb.201903018) describe a link between lysosomal cholesterol storage, calcium distribution alterations, and neuronal morphology in the neurodegenerative disorder Niemann-Pick type C.

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2023

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Disruptive lysosomal-metabolic signaling and neurodevelopmental deficits that precede Purkinje cell loss in a mouse model of Niemann-Pick Type-C disease

Kim

Ochoa

Melli

et al. 2023

Sci Rep

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Purkinje cell (PC) loss occurs at an early age in patients and animal models of Niemann-Pick Type C (NPC), a lysosomal storage disease caused by mutations in the Npc1 or Npc2 genes. Although degeneration of PCs occurs early in NPC, little is known about how NPC1 deficiency affects the postnatal development of PCs. Using the Npc1nmf164 mouse model, we found that NPC1 deficiency significantly affected the postnatal development of PC dendrites and synapses. The developing dendrites of Npc1nmf164 PCs were significantly deficient in mitochondria and lysosomes. Furthermore, anabolic (mTORC1) and catabolic (TFEB) signaling pathways were not only perturbed but simultaneously activated in NPC1-deficient PCs, suggesting a loss of metabolic balance. We also found that mice with conditional heterozygous deletion of the Phosphatase and Tensin Homolog Deleted on Chromosome 10 gene (Pten-cHet), an inhibitor of mTORC1, showed similar early dendritic alterations in PCs to those found in Npc1-deficient mice. However, in contrast to Npc1nmf164 mice, Pten-cHet mice exhibited the overactivation of the mTORC1 pathway but with a strong inhibition of TFEB signaling, along with no dendritic mitochondrial reductions by the end of their postnatal development. Our data suggest that disruption of the lysosomal-metabolic signaling in PCs causes dendritic and synaptic developmental deficits that precede and promote their early degeneration in NPC.

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Disruptive lysosomal-metabolic signaling and neurodevelopmental deficits that precede Purkinje cell loss in a mouse model of Niemann-Pick Type-C disease

Kim

Ochoa

Melli

et al. 2023

Sci Rep

View full text Add to dashboard Cite

show abstract

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A calcium message for Niemann-Pick type C

Cited by 1 publication

References 10 publications

Disruptive lysosomal-metabolic signaling and neurodevelopmental deficits that precede Purkinje cell loss in a mouse model of Niemann-Pick Type-C disease

Disruptive lysosomal-metabolic signaling and neurodevelopmental deficits that precede Purkinje cell loss in a mouse model of Niemann-Pick Type-C disease

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