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. 2000 Oct;34(1-2):151–158. doi: 10.1023/A:1008120313175

Justification of continuous packed-bed reactor for retroviral vector production from amphotropic ΨCRIP murine producer cell

Seung-Hyun Kang 1,2, Byung-Gee Kim 1,2,✉, Gyun Min Lee 3
PMCID: PMC3449741  PMID: 19003389

Abstract

To indentify a plausible large-scale production system forretroviral vector, three culture systems, i.e., batch culturewith medium exchange, microcarrier culture, and packed-bedreactor culture were compared. In batch cultures with mediumexchange, high cell concentrations were maintained for about amonth, and the harvested retroviral titer remained constant. Inmicrocarrier cultures, although cell growth was rapid, theretroviral titer was unexpectedly low, suggesting that the lowtiter was due either to serious damage to the retroviral vectoror to a reduction in the production rate of retroviral vector,caused by mechanical shear forces. Although the retroviral titer(maximum titer, 1.56 × 106) in the packed-bedreactor was a little bit lower than that obtained in the batchculture with medium exchange (maximum titer, 1.91 ×106), continuous production made it possible to increasethe cumulative titer up to 16-fold of that from the batchculture with medium exchange. Moreover, as the packed-bedreactor system requires less labor and shows excellentvolumetric productivity in comparison to batch cultures withmedium exchanges, it will be an appropriate production systemfor retroviral vector in large quantities.

Keywords: anchorage-dependent cell, cell culture, packed-bedreactor, retroviral vector, viral production

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