Structure Identification and Quality Analysis of Relative Impurities of Recombinant Insulin Glargine

LI Jing;LING Cheng-gng;ZHNG Hui;YNG Hu-xin;WNG D-mei

Chinese Pharmaceutical Journal ›› 2008, Vol. 43 ›› Issue (20) : 1588-1592.

Chinese Pharmaceutical Journal ›› 2008, Vol. 43 ›› Issue (20) : 1588-1592.
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Structure Identification and Quality Analysis of Relative Impurities of Recombinant Insulin Glargine

  • LI Jing1,LIANG Cheng-gang1,ZHANG Hui1,YANG Hua-xin1*,WANG Da-mei2
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Abstract

OBJECTIVE To improve the quality of insulin glargine by identifying primary impurities and their source.METHODS Firstly,the purified impurities were spiked in the standard of insulin glargine and were determined by HPLC.Secondly,major impurities were indentified by HPLC peptide map.Molecular weight and peptide mass fingerprinting with obtained by MALDI-TOF,and validated by tricine SDS-PAGE,N-terminal sequencing and mass/mass spectrometry.RESULTS Major impurities were analogs of insulin glargine and relative to the enzymatic steps in the manufacture process.CONCLUSION This method is rapid,economical and accurate for identifying primary impurities of insulin glargine.The novel idea in analyzing the source of impurities can be a reference for the study of impurities in other insulin analogs.

Key words

insulin glargine / matrix-associated laser desorption ionization time-of-flight mass(MAILDI-TOF) / peptide mapping fingerprint(PMF) / tricine SDS-PAGE

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LI Jing;LING Cheng-gng;ZHNG Hui;YNG Hu-xin;WNG D-mei. Structure Identification and Quality Analysis of Relative Impurities of Recombinant Insulin Glargine [J]. Chinese Pharmaceutical Journal, 2008, 43(20): 1588-1592

References

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