Lubricated biodegradable polymer networks for regulating nerve cell behavior and fabricating nerve conduits with a compositional gradient.

Lubricated biodegradable polymer networks for regulating nerve cell behavior and fabricating nerve conduits with a compositional gradient.
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DOI:
10.1021/bm201372u
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发表时间:
2012-02-13
期刊:
影响因子:
6.2
通讯作者:
Wang, Shanfeng
Wang, Shanfeng
中科院分区:
化学2区
文献类型:
--
作者:
Cai, Lei;Lu, Jie;Sheen, Volney;Wang, Shanfeng

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We present a method of tuning surface chemistry and nerve cell behavior by photo-crosslinking methoxy poly(ethylene glycol) monoacrylate (mPEGA) with hydrophobic, semi-crystalline poly(ε-caprolactone) diacrylate (PCLDA), at various weight compositions of mPEGA (ϕm) from 2 to 30%. Improved surface wettability is achieved with corresponding decreases in friction, water contact angle, and capability of adsorbing proteins from cell culture media because of repulsive PEG chains tethered in the network. The responses of rat Schwann cell precursor line (SpL201), rat pheochromocytoma (PC12), and E14 mouse neural progenitor cells (NPCs) to the modified surfaces are evaluated. Non-monotonic or parabolic dependence of cell attachment, spreading, proliferation, and differentiation on ϕm is identified for these cell types with maximal values at ϕm of 5–7%. In addition, NPCs demonstrate enhanced neuronal differentiated lineages on the mPEGA/PCLDA network at ϕm of 5% with intermediate wettability and surface energy. This approach lays the foundation for fabricating heterogeneous nerve conduits with a compositional gradient along the wall thickness, which are able to promote nerve cell functions within the conduit while inhibiting cell attachment on the outer wall to prevent potential fibrous tissue formation following implantation.
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