High-potentiality preliminary selection criteria and transformation time-dependent factors analysis for establishing Epstein?Barr virus transformed human lymphoblastoid cell lines

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Abstract
Infection of freshly isolated and cryopreserved lymphocytes with Epstein–Barr virus (EBV) leads to the establishment of human B lymphoblastoid cell lines (LCLs). Techniques for optimal infection of the lymphocytes are vital for the establishment of a human biobank. The present study found that more than half (58–86%) of such established LCLs had transport times of less than 48 h, cell densities exceeding 106 cells/ml and cell viabilities greater than 90%. After EBV infection, 3306 freshly isolated lymphocytes required 30.0 ± 0.1 days to become LCLs. Conversely, 1210 cryopreserved lymphocytes required 36.2 ± 0.4 days. Cell density and viability of the culture affected transformation time in freshly isolated lymphocytes. On the other hand, blood transport time, cryopreservation time and initial cell viability were major factors in cryopreserved specimens. These results contribute to general information concerning the establishment of a human biobank for EBV infected cells.