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  • The importance of formulation in the successful lyophilization of influenza reference materials.

The importance of formulation in the successful lyophilization of influenza reference materials.

Biologicals : journal of the International Association of Biological Standardization (2015-01-24)
Chinwe Duru, Carolyn Swann, Una Dunleavy, Barbara Mulloy, Paul Matejtschuk
ABSTRACT

Lyophilized Influenza antigen reference reagents are a critical resource in the quality control of influenza vaccines. A standard formulation has been used successfully at NIBSC for many years however, following the unexpected occurrence of a collapsed appearance in a particular batch a study was carried out to establish the impact of the sugar concentration in the formulation using modulated differential scanning calorimetry (mDSC) and nuclear magnetic resonance spectroscopy (NMR). There was a correlation between the presence and size of the mDSC eutectic temperature events and the freeze dried appearance of the cakes, which became progressively worse with increasing amounts of sugar. NMR spectroscopy could be used to positively identify and quantify the sugars in the formulations. MDSC can rapidly predict if the freeze dried appearance will be acceptable so as to assure the successful lyophilization of influenza reference preparations.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Acetone, puriss., meets analytical specification of Ph. Eur., BP, NF, ≥99% (GC)
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Acetone, suitable for HPLC, ≥99.8%
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Acetone, HPLC Plus, for HPLC, GC, and residue analysis, ≥99.9%
Mannitol, European Pharmacopoeia (EP) Reference Standard
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Acetone, Pharmaceutical Secondary Standard; Certified Reference Material
USP
Acetone, United States Pharmacopeia (USP) Reference Standard
Trehalose dihydrate, European Pharmacopoeia (EP) Reference Standard
USP
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D-(+)-Trehalose dihydrate, ≥98.5% (HPLC), from Saccharomyces cerevisiae
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D-(+)-Trehalose dihydrate, from Saccharomyces cerevisiae, powder, BioReagent, suitable for cell culture, suitable for insect cell culture, ≥99%
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D-(+)-Trehalose dihydrate, ≥99% (HPLC), from Saccharomyces cerevisiae
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D-Mannitol, ACS reagent
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D-Mannitol, meets EP, FCC, USP testing specifications
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Millipore
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D-Mannitol, BioUltra, ≥99.0% (sum of enantiomers, HPLC)
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Acetone, suitable for HPLC, ≥99.9%
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Acetone, natural, ≥97%
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