Abstract
NAP (NAPVSIPQ), derived from activity-dependent neuroprotective protein (ADNP) provides neuroprotection in vitro and in vivo against a wide variety of neurotoxic substances. To further understand the mechanism by which NAP provides broad neuroprotection it was essential to find NAPs binding partners. Previous results, using affinity chromatography coupled with mass spectrometry, identified tubulin, the subunit protein of microtubules, as the major NAP binding protein in neurons and glial cells. Here, following microtubule depolymerization in the presence of nocodazole, NAP treatment enhanced rapid microtubule assembly and stimulated neurite outgrowth. Nocodazole is an established inhibitor of axoplasmic transport and cell division that exerts its effect by depolymerizing microtubules. NAP shows selectivity in interacting with brain tubulin and does not affect dividing cells. This data demonstrates that NAP functions as a neuroprotectant, at least in part, through its interaction with tubulin with a resulting increase in microtubule assembly.
Keywords: ADNP gene, microtubule, tubulin polymerization, drug candidate, NAP binding proteins
Current Alzheimer Research
Title: NAP, A Neuroprotective Drug Candidate in Clinical Trials, Stimulates Microtubule Assembly in the Living Cell
Volume: 4 Issue: 5
Author(s): Illana Gozes and Inna Divinski
Affiliation:
Keywords: ADNP gene, microtubule, tubulin polymerization, drug candidate, NAP binding proteins
Abstract: NAP (NAPVSIPQ), derived from activity-dependent neuroprotective protein (ADNP) provides neuroprotection in vitro and in vivo against a wide variety of neurotoxic substances. To further understand the mechanism by which NAP provides broad neuroprotection it was essential to find NAPs binding partners. Previous results, using affinity chromatography coupled with mass spectrometry, identified tubulin, the subunit protein of microtubules, as the major NAP binding protein in neurons and glial cells. Here, following microtubule depolymerization in the presence of nocodazole, NAP treatment enhanced rapid microtubule assembly and stimulated neurite outgrowth. Nocodazole is an established inhibitor of axoplasmic transport and cell division that exerts its effect by depolymerizing microtubules. NAP shows selectivity in interacting with brain tubulin and does not affect dividing cells. This data demonstrates that NAP functions as a neuroprotectant, at least in part, through its interaction with tubulin with a resulting increase in microtubule assembly.
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Cite this article as:
Gozes Illana and Divinski Inna, NAP, A Neuroprotective Drug Candidate in Clinical Trials, Stimulates Microtubule Assembly in the Living Cell, Current Alzheimer Research 2007; 4 (5) . https://dx.doi.org/10.2174/156720507783018208
DOI https://dx.doi.org/10.2174/156720507783018208 |
Print ISSN 1567-2050 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5828 |
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