Multilocus DNA fingerprint analysis of cellbanks: Stability studies and culture identification in human B-lymphoblastoid and mammalian cell lines |
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Authors: | G N Stacey B J Bolton D Morgan S A Clark A Doyle |
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Institution: | (1) European Collection of Animal Cell Cultures, Division of Biologics, PHLS-CAMR, Porton Down, SP4 0JG Salisbury, UK |
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Abstract: | The technique of multilocus DNA fingerprinting has great potential for the authentication of animal cell cultures and in identification
of cross-contamination. The Alec Jeffreys probes 33.6 and 33.15 were used as multilocus probes to demonstrate the consistent
DNA fingerprint profiles in human peripheral blood and its derivative Epstein-Barr virus (EBV) transformed B-lymphoblastoid
cultures maintained by repeated subculture for six months. However, fingerprint analysis of EBV transformed cultures generated
from small numbers of cells showed that the majority (seven of eight cultures) had anomalous profiles. Some of these altered
profiles shared common features not seen in the peripheral blood pattern. Analysis of seven murine hybridoma clones from a
single fusion experiment revealed only two clones which could not be distinguished using probe 33.15. Further studies of master
and distribution cell banks for eleven cell lines demonstrated consistent fingerprint profiles in all cases except one (U937).
However, this cell line showed only minor differences in the master and distribution bank profiles. These data indicate that,
while changes in fingerprint profile may be identified in exceptional instances, the multilocus fingerprinting method using
probes 33.6 and 33.15 is a powerful and reliable tool in the quality control of animal cell cultures. |
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Keywords: | multilocus DNA fingerprinting Jeffreys probes 33 6 and 33 15 cell line authentication cell banks hybridomas Epstein-Barr virus transformed cultures |
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