Surface Plasmon Resonance Study of the Binding of PEO-PPO-PEO Triblock Copolymer and PEO Homopolymer to Supported Lipid Bilayers.
Surface Plasmon Resonance Study of the Binding of PEO-PPO-PEO Triblock Copolymer and PEO Homopolymer to Supported Lipid Bilayers.
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DOI:
10.1021/acs.langmuir.8b00873
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发表时间:
2018-06-12
期刊:
影响因子:
--
通讯作者:
Hackel BJ
中科院分区:
文献类型:
--
作者:
Kim M;Vala M;Ertsgaard CT;Oh SH;Lodge TP;Bates FS;Hackel BJ
Poloxamer 188 (P188), a poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) triblock copolymer, protects cell membranes against various external stresses whereas polyethylene oxide (PEO; 8,600 g/mol) homopolymer lacks protection efficacy. As part of a comprehensive effort to elucidate the protection mechanism, we used surface plasmon resonance (SPR) to obtain direct evidence of binding of the polymers onto supported lipid bilayers. Binding kinetics and coverage of the P188 and PEO were examined and compared. Most notably, the PEO exhibited comparable membrane association to that of the P188, evidenced by comparable association rate constants and coverage. This result highlights the need for additional mechanistic understanding beyond simple membrane association to explain the differential efficacy of P188 in therapeutic applications.
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