Devices and methods for integrated continuous manufacturing of biological molecules
The present invention relates to a process and apparatus for purifying a molecule of interest from a heterogeneous clarified fluid mixture. The apparatus of the invention generally comprises a continuous perfusion fermentation system, a continuous particle removal system integrated with the perfusion fermentation system; and a continuous purification system integrated with the particle removal system, which is maintained under sterile conditions. The process comprises filtering a heterogeneous clarified fluid mixture by continuous ultrafiltration at a specific flow rate below the transition point of the molecule of interest in the pressure-dependent region of the flux versus TMP curve, wherein the specific flow rate is maintained substantially constant throughout the continuous ultrafiltration.
1. A process for partially purifying and concentrating a labile protein of interest from a heterogeneous tissue culture fluid mixture, consisting of the steps:
(a) producing by a continuous perfusion fermentation process a heterogeneous tissue culture fluid mixture containing a labile protein of interest;
(b) transferring the tissue culture fluid mixture to a continuous particle removal process integrated with the continuous perfusion fermentation system;
(c) removing particulate contaminants from the tissue culture fluid in the continuous particle removal process to produce a clarified tissue culture fluid containing the protein of interest;
(d) transferring the clarified tissue culture fluid to one or more surge vessels integrated with the continuous particle removal process;
(e) optionally adjusting the pH, ionic strength, or protein stabilization properties of the clarified tissue culture fluid; and
(f) transferring the clarified tissue culture fluid to one or more convective ion exchange adsorber/desorber membranes integrated with the surge vessels; and
(g) purifying the protein of interest from the clarified tissue culture fluid in the convective ion exchange adsorber/desorber membranes to produce a particle-free, concentrated and partially purified protein of interest; wherein a specific flow rate of the mixture through the continuous perfusion fermentation process and continuous particle removal process is maintained substantially constant and wherein a loading flow rate through the convective ion exchange adsorber/desorber membrane is greater than the specific flow rate.
2. The process according to claim 1 , wherein the protein of interest is Factor VIII.
3. A process for partially purifying and concentrating a labile protein of interest from a heterogeneous tissue culture fluid mixture, consisting of the steps:
(a) producing by a continuous perfusion fermentation process a heterogeneous tissue culture fluid mixture containing a labile protein of interest;
(b) transferring the tissue culture fluid mixture to a continuous particle removal process integrated with the continuous perfusion fermentation system;
(c) removing particulate contaminants from the tissue culture fluid in the continuous particle removal process to produce a clarified tissue culture fluid containing the protein of interest;
(d) transferring the clarified tissue culture fluid to one or more surge vessels integrated with the continuous particle removal process;
(e) adjusting the pH, ionic strength, or protein stabilization properties of the clarified tissue culture fluid; and
(f) transferring the clarified tissue culture fluid to one or more convective ion exchange adsorber/desorber membranes integrated with the surge vessels; and
(g) purifying the protein of interest from the clarified tissue culture fluid in the convective ion exchange adsorber/desorber membranes to produce a particle-free, concentrated and partially purified protein of interest; wherein a specific flow rate of the mixture through the continuous perfusion fermentation process and continuous particle removal process is maintained substantially constant and wherein a loading flow rate through the convective ion exchange adsorber/desorber membrane is greater than the specific flow rate.
4. The process according to claim 3 , wherein the labile protein of interest is Factor VIII.