Rotating Bed Bioreactors: a Novel Way to Natural Proteins by Tissue-like Cultivation of Mammalian Cells

Abstract

Animal derived protein hydrolysates are commonly used as a complex supplement for cell culture media because of their well known growth promoting properties. In an approach to find components being responsible for this effect we fractionated a protein hydrolysate by solid phase extraction (SPE) on a C18-matrix. After lyophilization and further preparation the fractions were tested for their proliferation enhancing ability with a hybridoma cell line in a serum-free DMEM/F12 medium supplemented with human serum albumin and transferrin. We could demonstrate a growth promoting effect caused by a rather hydrophilic fraction. In further investigations preparative High Performance Liquid Chromatography (HPLC) was used to produce growth promoting fractions of less complexity for cell evaluation and analytical HPLC.