Brain‑derived and glial cell line‑derived neurotrophic factor fusion protein immobilization to laminin

Wang,Baoxin; Yuan,Junjie; Xu,Jiafeng; Chen,Xinwei; Ying,Xinjiang; Dong,Pin

doi:10.3892/etm.2016.3925

Brain‑derived and glial cell line‑derived neurotrophic factor fusion protein immobilization to laminin

Authors:
- Baoxin Wang
- Junjie Yuan
- Jiafeng Xu
- Xinwei Chen
- Xinjiang Ying
- Pin Dong
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Affiliations: Department of Otolaryngology, Head and Neck Surgery, Shanghai Jiao Tong University Affiliated to Shanghai First People's Hospital, Shanghai 201620, P.R. China, Department of Orthopedics, Shanghai Fengxian District Central Hospital, Shanghai Jiao Tong University Affiliated to Sixth People's Hospital South Campus, Shanghai 200011, P.R. China, School of Economics and Finance, Shanghai International Studies University, Shanghai 200083, P.R. China
Published online on: November 23, 2016 https://doi.org/10.3892/etm.2016.3925
Pages: 178-186
Copyright: © Wang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Damage to the recurrent laryngeal nerve often causes hoarseness, dyspnea, dysphagia, and sometimes asphyxia due to vocal cord paralysis which result in a reduction of quality of life. Brain‑derived neurotrophic factor (BDNF) and glial cell line‑derived neurotrophic factor (GDNF) play critical roles in peripheral nerve regeneration. However, methods for efficiently delivering these molecules are lacking, which limits their use in clinical applications. The present study reports an effective strategy for targeting BDNF and GDNF to laminin by fusing the N‑terminal domains of these molecules with agrin (NtA). More specifically, laminin‑binding efficacy was assessed and sustained release assays of the delivery of BDNF or GDNF fused with NtA (LBD‑BDNF or LBD‑GDNF) to laminin were conducted in vitro. In addition, the bioactivity of LBD‑BDNF and LBD‑GDNF on laminin in vitro was investigated. LBD‑BDNF and LBD‑GDNF were each able to specifically bind to laminin and maintain their activity in vitro. Moreover, neurotrophic factors with NtA retained higher concentrations and bioactivity levels compared with those without NtA. The ratio of LBD‑BDNF and LBD‑GDNF that produced optimal effects was 4:6. BDNF and GDNF fused with NtA were effective in specifically binding to laminin. As laminin is a major component of the extracellular matrix, LBD‑BDNF and LBD‑GDNF may prove useful in the repair of peripheral nerve injuries.

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