Development and certification of an industrial reference standard for determination of filgrastim activity

Abstract

The article provides with the information on certification of an industrial reference standard (IRS) for determination of filgrastim activity. In order to confirm the quality of the IRS candidate, the following tests have been performed: biological activity, description, identification, clarity, colority, sterility, pH, foreign impurities, bacterial endotoxins, as well as the assay of: Filgrastim, Acetate ion, Polysorbate 80, residual Host Cell Proteins, residual Host Cell DNA. The results fully meet the requirements for filgrastim samples. The reference standard is certified for biological activity. The purpose of the IRS for determination of filgrastim activity is the assessment of acceptability of the results of biological activity tests in the quality control of substances and drugs based on filgrastim. Biological activity of the IRS candidate has been assessed by interlaboratory studies as compared against the second international standard NIBSC-09/136. The certified value for «Biological activity» of the IRS for determination of filgrastim activity has been set as 32.2±5.35 million IU/ml. The shelf-life under the storage conditions of 2 to 8oC has been set as not less than 2 years. The results of long-term stability studies the IRS confirm its stability during the monitored period