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CHANG Yinlong, XIAO liang, ZHENG Jiemin, WANG Qianqian, ZHANG Liming. Protein stability and hemolytic activity of tentacle extract from the jellyfish Cyanea capillata[J]. Journal of Pharmaceutical Practice and Service, 2014, 32(6): 434-439. doi: 10.3969/j.issn.1006-0111.2014.06.009
Citation: CHANG Yinlong, XIAO liang, ZHENG Jiemin, WANG Qianqian, ZHANG Liming. Protein stability and hemolytic activity of tentacle extract from the jellyfish Cyanea capillata[J]. Journal of Pharmaceutical Practice and Service, 2014, 32(6): 434-439. doi: 10.3969/j.issn.1006-0111.2014.06.009

Protein stability and hemolytic activity of tentacle extract from the jellyfish Cyanea capillata

doi: 10.3969/j.issn.1006-0111.2014.06.009
  • Received Date: 2013-11-25
  • Rev Recd Date: 2014-07-07
  • Objective To investigate the influencing factors of the protein stability and hemolytic activity of tentacle extract (TE) from the jellyfish Cyanea capillata. Methods Effects of various factors and treatments on the protein stability and hemolytic activity of TE were explored by protein detection, hemolytic assay and SDS-PAGE analysis. Results TE caused a significant and dose-dependent hemolytic effect, and the HU50 of TE against 0.5% erythrocyte suspensions from SD rats was 226 μg/ml. A 40℃ water bath for 1 hour could effectively remove the contaminating proteins in TE. TE retained hemolytic activity at 4℃ for 28 days but it was unstable when kept at 25℃ over 3 days. TE was active in the range from pH 6.0 to 11.0 and the optimum pH was 8.0. Various buffer solutions had significantly different effects on the stability and hemolytic activity of TE, and a good salting-out effect was observed on the hemolytic protein of TE while the concentration of ammonium sulfate solutions was greater than 26%. Conclusion A 40℃ water bath for 1 hour could effectively remove the contaminating proteins in TE and reduce its viscosity. The optimum conditions for maintaining stability and hemolytic activity of TE were 4℃ and pH 8.0. The salting-out effect from 26% and more ammonium sulfate solutions would be conducive to the enrichment of hemolytic protein.
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Protein stability and hemolytic activity of tentacle extract from the jellyfish Cyanea capillata

doi: 10.3969/j.issn.1006-0111.2014.06.009

Abstract: Objective To investigate the influencing factors of the protein stability and hemolytic activity of tentacle extract (TE) from the jellyfish Cyanea capillata. Methods Effects of various factors and treatments on the protein stability and hemolytic activity of TE were explored by protein detection, hemolytic assay and SDS-PAGE analysis. Results TE caused a significant and dose-dependent hemolytic effect, and the HU50 of TE against 0.5% erythrocyte suspensions from SD rats was 226 μg/ml. A 40℃ water bath for 1 hour could effectively remove the contaminating proteins in TE. TE retained hemolytic activity at 4℃ for 28 days but it was unstable when kept at 25℃ over 3 days. TE was active in the range from pH 6.0 to 11.0 and the optimum pH was 8.0. Various buffer solutions had significantly different effects on the stability and hemolytic activity of TE, and a good salting-out effect was observed on the hemolytic protein of TE while the concentration of ammonium sulfate solutions was greater than 26%. Conclusion A 40℃ water bath for 1 hour could effectively remove the contaminating proteins in TE and reduce its viscosity. The optimum conditions for maintaining stability and hemolytic activity of TE were 4℃ and pH 8.0. The salting-out effect from 26% and more ammonium sulfate solutions would be conducive to the enrichment of hemolytic protein.

CHANG Yinlong, XIAO liang, ZHENG Jiemin, WANG Qianqian, ZHANG Liming. Protein stability and hemolytic activity of tentacle extract from the jellyfish Cyanea capillata[J]. Journal of Pharmaceutical Practice and Service, 2014, 32(6): 434-439. doi: 10.3969/j.issn.1006-0111.2014.06.009
Citation: CHANG Yinlong, XIAO liang, ZHENG Jiemin, WANG Qianqian, ZHANG Liming. Protein stability and hemolytic activity of tentacle extract from the jellyfish Cyanea capillata[J]. Journal of Pharmaceutical Practice and Service, 2014, 32(6): 434-439. doi: 10.3969/j.issn.1006-0111.2014.06.009
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