CULTIVATION OF HYBRIDOMA CELLS IN AN INCLINED BIOREACTOR

Murine hybridoma cells were grown in a bubble column that was inclined up to 45 degrees from vertical. Inclining the column by a few degrees separated the rising bubbles against the upper surface, leaving the b ulk of the liquid bubble free. The liquid was circulated well by the r ising bubbles, but collection of cells by rising bubbles and exposure of cells to bursting bubbles were minimized. Maximum viable cell count and exponential growth of the cells were not affected by inclination, but an inclination of 30 degrees gave an antibody titer of 42 mg/L, w hich more than doubled the yield of 17 mg/L in the vertical position. By comparison, the culture gave yields of 30 mg/L when grown in spinne r flasks. The enhanced antibody production in the inclined bioreactor corresponded to a prolonged stationary phase of 45 h. (C) 1995 John Wi ley & Sons, Inc.