Abstract
A liquid chromatography-high resolution mass spectrometry (LC-HRMS) method was developed using three peptide drugs: salmon calcitonin, bivalirudin, and exenatide as model systems to assess the suitability of this approach for monitoring peptide drug product quality. Calcitonin and its related impurities displayed linear responses over the range from 0.1 to 10 μM (R 2 values for calcitonin salmon, Glu14-calcitonin, and acetyl-calcitonin were 0.995, 0.996, and 0.993, respectively). Intra-assay precision in terms of relative standard deviation (%RSD) was less than 10% at all tested concentrations. The accuracy of the method was greater than 85% as measured by spiking 0.1, 0.3, and 1% of Glu14-calcitonin and acetyl-calcitonin into a stock calcitonin solution. Limits of detection for calcitonin, Glu14-calcitonin, and acetyl-calcitonin were 0.02, 0.03, and 0.04 μM, respectively, indicating that an impurity present at less than 0.1% (0.1 μM) of the drug product API concentration (107 μM) could be detected. Method validation studies analyzing bivalirudin and exenatide drug products exhibited similar results to calcitonin salmon in regard to high selectivity, sensitivity, precision, and linearity. Added benefits of using LC-HRMS-based methods are the ability to also determine amino acid composition, confirm peptide sequence, and quantify impurities, even when they are co-eluting, within a single experiment. LC-HRMS represents a promising approach for the quality control of peptides including the measurement of any peptide-related impurities. While the development work performed here is focus on peptide drug products, the principles could be adapted to peptide drug substance.
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Abbreviations
- AA:
-
Amino acid
- AC:
-
N-acetyl-calcitonin salmon
- API:
-
Active pharmaceutical ingredient
- BA:
-
Beta-aspartic acid-bivalirudin
- BV:
-
Bivalirudin
- BV[12–20]:
-
12–20 fragment of bivalirudin
- sCT:
-
Calcitonin salmon
- DCM:
-
Dichloromethane
- DG:
-
Des-glycine-bivalirudin
- EIC:
-
Extracted ion chromatogram
- ET:
-
Exenatide
- Glu14 :
-
Glu14-calcitonin salmon
- Glu20 :
-
Glu20-calcitonin salmon
- LC-MS:
-
Liquid chromatography mass spectrometry
- LC-HRMS:
-
Liquid chromatography-high resolution mass spectrometry
- LOD:
-
Limit of detection
- LOQ:
-
Limit of quantification
- MEW:
-
Mass extraction window
- MS/MS:
-
Tandem mass spectrometry
- NDA/ANDA:
-
New Drug Application/Abbreviated New Drug Application
- NMT:
-
Not more than
- PG:
-
Plus-glycine-bivalirudin
- SPPS:
-
Solid-phase peptide synthesis
- TIC:
-
Total ion chromatogram
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Internal funding for this work was provided by the CDER Critical Path Program and the Office of Generic Drugs (MTB).
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The findings and conclusions of this article have not been formally disseminated by the Food and Drug Administration and should not be construed to represent any agency determination or policy.
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Zeng, K., Geerlof-Vidavisky, I., Gucinski, A. et al. Liquid Chromatography-High Resolution Mass Spectrometry for Peptide Drug Quality Control. AAPS J 17, 643–651 (2015). https://doi.org/10.1208/s12248-015-9730-z
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DOI: https://doi.org/10.1208/s12248-015-9730-z