Abstract:
:Local delivery of neurotrophic factors is a pillar of neural repair strategies in the peripheral nervous system. The main disadvantage of the free growth factors is their short half-life of few minutes. In order to prolong their activity, we have conjugated to iron oxide nanoparticles three neurotrophic factors: nerve growth factor (βNGF), glial cell-derived neurotrophic factor (GDNF), and basic fibroblast growth factor (FGF-2). Comparative stability studies of free versus conjugated factors revealed that the conjugated neurotrophic factors were significantly more stable in tissue cultures and in medium at 37°C. The biological effects of free versus conjugated neurotrophic factors were examined on organotypic dorsal root ganglion (DRG) cultures performed in NVR-Gel, composed mainly of hyaluronic acid and laminin. Results revealed that the conjugated neurotrophic factors enhanced early nerve fiber sprouting compared to the corresponding free factors. The most meaningful result was that conjugated-GDNF, accelerated the onset and progression of myelin significantly earlier than the free GDNF and the other free and conjugated factors. This is probably due to the beneficial and long-acting effect that the stabilized conjugated-GDNF had on neurons and Schwann cells. These conclusive results make NVR-Gel enriched with conjugated-GDNF, a desirable scaffold for the reconstruction of severed peripheral nerve.
journal_name
Biomed Res Intjournal_title
BioMed research internationalauthors
Ziv-Polat O,Shahar A,Levy I,Skaat H,Neuman S,Fregnan F,Geuna S,Grothe C,Haastert-Talini K,Margel Sdoi
10.1155/2014/267808subject
Has Abstractpub_date
2014-01-01 00:00:00pages
267808eissn
2314-6133issn
2314-6141journal_volume
2014pub_type
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