PMID- 33491764 OWN - NLM STAT- MEDLINE DCOM- 20220328 LR - 20220328 IS - 1097-0290 (Electronic) IS - 0006-3592 (Linking) VI - 118 IP - 5 DP - 2021 May TI - Red cell manufacturing using parallel stirred-tank bioreactors at the final stages of differentiation enhances reticulocyte maturation. PG - 1763-1778 LID - 10.1002/bit.27691 [doi] AB - The aim of this study was to develop a robust, quality controlled, and reproducible erythroid culture system to obtain high numbers of mature erythroblasts and red blood cells (RBCs). This was achieved using a fully controlled stirred-tank bioreactor by the design of experiments (DOE) methods in the serum-free medium by defining the appropriate culture parameters. Human cord blood CD34+ cells were first cultured in static flasks and then inoculated to stirred-tank bioreactors. Cell diameter was gradually decreased and final RBC yields were significantly higher when cells were inoculated at sizes smaller than 12 mum. The larger immature cells in the basophilic stage did not survive, while smaller mature erythroid cells were successfully expanded at high agitation speeds, demonstrating that appropriate seeding timing is critical. A high inoculation cell density of 5 x 10(6) cells/ml was achieved reaching 1.5 x 10(7) cells/ml. By using DOE analysis fitted to precise stages of erythropoiesis, we were able to acquire the optimal culture parameters for pH (7.5), temperature (37 degrees C), dissolved oxygen, agitation speed (500 rpm), inoculation timing (cell diameter 12-13 mum), media feeding regimen, and cell seeding density (5 x 10(6) cells/ml). The final pure RBCs showed appropriate functions compared with fresh donor RBCs, confirming that manufacturing mature RBCs with reproducibility is possible. CI - (c) 2021 Wiley Periodicals LLC. FAU - Han, So Yeon AU - Han SY AD - Department of Translational Medicine, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, Republic of Korea. AD - Department of Laboratory Medicine, College of Medicine, Hanyang University, Seoul, Republic of Korea. FAU - Lee, Eun Mi AU - Lee EM AD - Department of Translational Medicine, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, Republic of Korea. AD - Department of Laboratory Medicine, College of Medicine, Hanyang University, Seoul, Republic of Korea. FAU - Lee, Janghan AU - Lee J AD - New Drug Development Center, Osong Medical Innovation Foundation, Cheongju, Republic of Korea. AD - College of Pharmacy, Chungbuk National University, Cheongju, Republic of Korea. FAU - Lee, Hyosang AU - Lee H AD - New Drug Development Center, Osong Medical Innovation Foundation, Cheongju, Republic of Korea. FAU - Kwon, Amy M AU - Kwon AM AUID- ORCID: 0000-0003-1632-0677 AD - Biostatistical Consulting and Research Laboratory, Medical Research Collaborating Center, Industry-University Cooperation Foundation, Hanyang University, Seoul, Republic of Korea. AD - Biostatistics Core, Medicine-Engineering-Bio (MEB) Center, Industry-University Cooperation Foundation, Hanyang University, Seoul, Republic of Korea. FAU - Ryu, Ki Young AU - Ryu KY AD - Departmemt of Obstetrics and Gynecology, College of Medicine, Hanyang University, Seoul, Republic of Korea. FAU - Choi, Won-Seok AU - Choi WS AD - New Drug Development Center, Osong Medical Innovation Foundation, Cheongju, Republic of Korea. FAU - Baek, Eun Jung AU - Baek EJ AUID- ORCID: 0000-0001-5477-6486 AD - Department of Translational Medicine, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, Republic of Korea. AD - Department of Laboratory Medicine, College of Medicine, Hanyang University, Seoul, Republic of Korea. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210202 PL - United States TA - Biotechnol Bioeng JT - Biotechnology and bioengineering JID - 7502021 SB - IM MH - *Bioreactors MH - Cell Culture Techniques/*methods MH - Cell Differentiation MH - Cells, Cultured MH - Erythrocytes/*cytology MH - Female MH - Fetal Blood/cytology MH - Humans MH - Pregnancy MH - Reticulocytes/*cytology OTO - NOTNLM OT - bioreactor OT - blood OT - design of experiments OT - erythrocyte OT - in vitro cell culture EDAT- 2021/01/26 06:00 MHDA- 2022/03/29 06:00 CRDT- 2021/01/25 08:43 PHST- 2021/01/20 00:00 [revised] PHST- 2020/09/01 00:00 [received] PHST- 2021/01/22 00:00 [accepted] PHST- 2021/01/26 06:00 [pubmed] PHST- 2022/03/29 06:00 [medline] PHST- 2021/01/25 08:43 [entrez] AID - 10.1002/bit.27691 [doi] PST - ppublish SO - Biotechnol Bioeng. 2021 May;118(5):1763-1778. doi: 10.1002/bit.27691. Epub 2021 Feb 2.