Water Proton NMR for In Situ Detection of Insulin Aggregates.
The need for quality control during the manufacturing and distribution of biopharmaceuticals is becoming increasingly necessary. At present, detecting drug degradation through the monitoring of active factor aggregation is accomplished through "invasive" techniques, such as size-exclusion chromatography (SEC), analytical ultracentrifugation (AUC), and so on. Unfortunately, these analytical methods require sampling the drug by opening the drug container that renders the remaining drug unusable regardless of the outcome of the test. Visual inspection, the current non-invasive quality control method is qualitative and can only detect visible particulates. Thus, it will miss sub-visible protein aggregates. In this paper, human insulin preparations were used to demonstrate that the transverse relaxation rate of water protons R2 ((1) H2 O) can serve as a sensitive and reliable indicator to detect and quantify both visible and sub-visible protein aggregates. R2 ((1) H2 O) is measured using a wide-bore low-field bench-top NMR instrument with permanent magnets. Such analysis could be carried out without opening the drug container, thus saving a drug for further use. The results suggest a novel, economical, non-destructive in situ analytical technique that allows for on-the-site quantification of protein aggregation in biopharmaceutical products.
Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, Maryland 21201.
Marc B
MB
Taraban
Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, Maryland 21201.
Huy C
HC
Truong
Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, Maryland 21201.
Yue
Y
Feng
Light Scattering Center, Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742.
Elena V
EV
Jouravleva
Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742.
Mikhail A
MA
Anisimov
Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, Maryland 21201. Electronic address: byu@rx.umaryland.edu.
Yihua Bruce
YB
Yu
D001702:Biopharmaceutics / Q000379:methods; D004349:Drug Packaging / Q000379:methods; D006801:Humans; D007328:Insulin / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D066329:Protein Aggregates / Q000502:physiology; D011522:Protons; D014461:Ultracentrifugation / Q000379:methods; D014867:Water / Q000737:chemistry*
D007328:Insulin; D066329:Protein Aggregates; D011522:Protons; D014867:Water
NMR spectroscopy; dynamic light scattering; insulin; liquid chromatography; particle size; protein aggregation; proteins; size-exclusion chromatography; water proton transverse relaxation rate