Abstract
Capsular polysaccharide produced by Haemophilus influenzae b (Hib) is the main virulent agent and used as the antigen in the vaccine formulation. In this study, an improved process of polysaccharide purification was established based on tangential flow ultrafiltration using detergents (cocamidopropyl betaine and sodium deoxycholate), two selective ethanol precipitations steps, and extensive enzymatic hydrolysis as strategy. The relative purity (RP) related to protein and nucleic acids were 122∼263 and 294∼480, respectively, and compatible with the specifications established by the World Health Organization for Hib vaccine, RP ≥ 100. These results make this process simple, cheaper, efficient, environmentally friendly, and prone to be scaled up.
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Acknowledgments
We gratefully acknowledge the financial support from the São Paulo Research Foundation (FAPESP 2007/50082-2) and the Butantan Foundation—Brazil. Silvia M.F. Albani received a scholarship from the Secretary of Education of São Paulo State. We also thank Mr. Lourivaldo Inácio de Souza and Ms. Inês do Amaral Maurelli for the technical assistance.
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Albani, S.M.F., da Silva, M.R., Takagi, M. et al. Improvement in the Purification Process of the Capsular Polysaccharide from Haemophilus influenzae Type b by Using Tangential Ultrafiltration and Diafiltration. Appl Biochem Biotechnol 167, 2068–2075 (2012). https://doi.org/10.1007/s12010-012-9750-4
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DOI: https://doi.org/10.1007/s12010-012-9750-4