<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>γ</mml:mi></mml:math>-Cyclodextrin Increases Hydrolysis of Gangliosides by Sialidase from<i>Arthrobacter ureafaciens</i>: Hydrolysis of Gangliosides

Mitsumori, Rie; Kato, Tomohisa; Hatanaka, Kenichi

doi:10.1155/2009/398284

Cited by 2 publications

(1 citation statement)

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“…In fact, we observed a small increase in % GM2 and GM3 gangliosides in Npc1 −/− mice treated with α CDs (which showed the highest Ks). It is conceivable that direct interaction with CDs modulated efficiency of ganglioside catabolism . On the other hand, reduction of ganglioside accumulation in LE/LY may arise indirectly.…”

Section: Discussionmentioning

confidence: 99%

Efficacy and ototoxicity of different cyclodextrins in Niemann–Pick C disease

Davidson

Fishman

Puskás

et al. 2016

Ann Clin Transl Neurol

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ObjectiveNiemann–Pick type C (NPC) disease is a fatal, neurodegenerative, lysosomal storage disorder characterized by intracellular accumulation of unesterified cholesterol (UC) and other lipids. While its mechanism of action remains unresolved, administration of 2‐hydroxypropyl‐β‐cyclodextrin (HPβCD) has provided the greatest disease amelioration in animal models but is ototoxic. We evaluated other cyclodextrins (CDs) for treatment outcome and chemical interaction with disease‐relevant substrates that could pertain to mechanism.MethodsNPC disease mice treated for 2 weeks with nine different CDs were evaluated for UC, and GM2 and GM3 ganglioside accumulation using immunohisto/cytochemical and biochemical assays. Auditory brainstem responses were determined in wild‐type mice administered CDs. CD complexation with UC, gangliosides, and other lipids was quantified.ResultsFour HPβCDs varying in degrees of substitution, including one currently in clinical trial, showed equivalent storage reduction, while other CDs showed significant differences in relative ototoxicity and efficacy, with reductions similar for the brain and liver. Importantly, HPγCD and two sulfobutylether‐CDs showed efficacy with reduced ototoxicity. Complexation studies showed: incomplete correlation between CD efficacy and UC solubilization; an inverse correlation for ganglioside complexation; substantial interaction with several relevant lipids; and association between undesirable increases of UC storage in Kupffer cells and UC solubilization.InterpretationCDs other than HPβCD identified here may provide disease amelioration without ototoxicity and merit long‐term treatment studies. While direct interactions of CD‐UC are thought central to the mechanism of correction, the data show that this does not strictly correlate with complexation ability and suggest interactions with other NPC disease‐relevant substrates should be considered.

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Section: Discussionmentioning

confidence: 99%