Sequencing of phosphorodiamidate morpholino oligomers (PMOs) by hydrophilic interaction chromatography (HILIC) coupled to tandem mass spectrometry (MS/MS) is reported. The MS/MS analysis was performed using a quadrupole/time-of-flight (Q-ToF) mass analyzer and collision induced dissociation (CID) in negative ion mode. To improve MS sensitivity in negative ion mode, HILIC conditions, including the separation column, mobile phases, and MS parameters, were optimized. Using the developed HILIC-CID-MS/MS method, 100% sequence coverage was achieved for PMOs ranging from 18-mer to 25-mer. Additionally, the method was successfully applied to identifying positional isomers of n - 1 deletion impurities present in PMO drug substances.
机构:
Umea Univ, Dept Med Biochem & Biophys, SE-90187 Umea, SwedenUmea Univ, Dept Med Biochem & Biophys, SE-90187 Umea, Sweden
Kong, Ziqing
Jia, Shaodong
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Umea Univ, Dept Med Biochem & Biophys, SE-90187 Umea, SwedenUmea Univ, Dept Med Biochem & Biophys, SE-90187 Umea, Sweden
Jia, Shaodong
Chabes, Anna Lena
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Umea Univ, Dept Med Biochem & Biophys, SE-90187 Umea, SwedenUmea Univ, Dept Med Biochem & Biophys, SE-90187 Umea, Sweden
Chabes, Anna Lena
Appelblad, Patrik
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Umea Univ, Dept Pharmacol & Clin Neurosci, SE-90187 Umea, Sweden
Merck Chem & Life Sci AB, SE-16903 Solna, SwedenUmea Univ, Dept Med Biochem & Biophys, SE-90187 Umea, Sweden
Appelblad, Patrik
Lundmark, Richard
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Umea Univ, Dept Integrat Med Biol, SE-90187 Umea, Sweden
Umea Univ, Lab Mol Infect Med Sweden MIMS, SE-90187 Umea, SwedenUmea Univ, Dept Med Biochem & Biophys, SE-90187 Umea, Sweden
机构:
Hong Kong Baptist Univ, Sch Chinese Med, Kowloon, Hong Kong, Peoples R China
Natl Inst Metrol, Div Biol Energy & Environm Measurement, Beijing 100013, Peoples R ChinaHong Kong Baptist Univ, Sch Chinese Med, Kowloon, Hong Kong, Peoples R China
Fu, Boqiang
Gao, Xinyan
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Hong Kong Baptist Univ, Sch Chinese Med, Kowloon, Hong Kong, Peoples R ChinaHong Kong Baptist Univ, Sch Chinese Med, Kowloon, Hong Kong, Peoples R China
Gao, Xinyan
Zhang, Shi Ping
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Hong Kong Baptist Univ, Sch Chinese Med, Kowloon, Hong Kong, Peoples R ChinaHong Kong Baptist Univ, Sch Chinese Med, Kowloon, Hong Kong, Peoples R China
Zhang, Shi Ping
Cai, Zongwei
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Hong Kong Baptist Univ, Dept Chem, Kowloon, Hong Kong, Peoples R ChinaHong Kong Baptist Univ, Sch Chinese Med, Kowloon, Hong Kong, Peoples R China
Cai, Zongwei
Shen, Jincan
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Shenzhen Entry Exit Inspect & Quarantine Bur PRC, Inspect Ctr Import & Export Food, Shenzhen 518067, Peoples R ChinaHong Kong Baptist Univ, Sch Chinese Med, Kowloon, Hong Kong, Peoples R China