Abstract：
:The Npc1nih/nih-null model and the Npc1nmf164/nmf164 hypomorph models of Niemann-Pick C1 (NPC1) disease show defects in olfaction. We have tested the effects of the life-prolonging treatment hydroxypropyl-beta-cyclodextrin (HPBCD) on olfaction and neural stem cell numbers when delivered either systemically or by nasal inhalation. Using the paradigm of finding a hidden cube of food after overnight food deprivation, Npc1nih/nih homozygous mice showed a highly significant delay in finding the food compared with wild-type mice. Npc1nmf164/nmf164 homozygous mice showed an early loss of olfaction which was mildly corrected by somatic delivery of HPBCD which also increased the number of neural stem cells in the mutant but did not change the number in wild-type mice. In contrast, nasal delivery of this drug, at 1/5 the dosage used for somatic delivery, to Npc1nmf164/nmf164 mutant mice delayed loss of olfaction but the control of nasal delivered saline did so as well. The nasal delivery of HPBCD to wild-type mice caused loss of olfaction but nasal delivery of saline did not. Neural stem cell counts were not improved by nasal therapy with HPBCD. We credit the delay in olfaction found with the treatment, a delay which was also found for time of death, to a large amount of stimulation the mice received with handling during the nasal delivery.
journal_name
J Appl Genetjournal_title
Journal of applied geneticsauthors
Dragotto J,Palladino G,Canterini S,Caporali P,Patil R,Fiorenza MT,Erickson RPdoi
10.1007/s13353-019-00517-8subject
Has Abstractpub_date
2019-11-01 00:00:00pages
357-365issue
3-4eissn
1234-1983issn
2190-3883pii
10.1007/s13353-019-00517-8journal_volume
60pub_type
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