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Characterization of rainbow trout cell lines using microsatellite DNA profiling.

G M Perry1, G J McDonald, M M Ferguson

  • 1Department of Zoology, University of Guelph, Guelph, N1G 2W1, Canada.

Cytotechnology
|November 13, 2008
PubMed
Summary

Genetic profiling using ten microsatellite loci confirmed the uniqueness of salmonid cell lines. This method effectively identified a misidentified rainbow trout cell line as Chinook salmon, highlighting its utility in preventing cross-contamination.

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Area of Science:

  • Molecular Biology
  • Aquaculture Genetics
  • Cell Line Authentication

Background:

  • Maintaining authentic cell lines is crucial for reproducible research in aquaculture and fisheries.
  • Genetic drift and cross-contamination can compromise the integrity of established cell lines.
  • Microsatellite markers offer a powerful tool for distinguishing closely related individuals and cell lines.

Purpose of the Study:

  • To develop and apply a multiplexed microsatellite genotyping assay for salmonid cell line authentication.
  • To establish genetic profiles for various rainbow trout (Oncorhynchus mykiss) and Chinook salmon (O. tschawytscha) cell lines.
  • To validate the utility of microsatellite analysis in identifying cell line misidentification and cross-contamination.

Main Methods:

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  • Amplification of ten specific microsatellite loci using the polymerase chain reaction (PCR).
  • Genotyping of nine rainbow trout cell lines, one Chinook salmon cell line, and a Pacific herring (Clupea harengus pallasi) control.
  • Comparative analysis of genetic profiles across all tested cell lines to assess uniqueness.

    • Main Results:

    • All tested cell lines, except for two derived from the same fish (RTP-91E and RTP-91F), showed unique genetic profiles.
    • The microsatellite locus Ots1BML proved most effective in differentiating between cell lines.
    • An uncharacterized rainbow trout cell line (Clone 1A) was definitively identified as CHSE-214 (Chinook salmon).

    Conclusions:

    • Multiplexed microsatellite analysis is a reliable and efficient method for creating genetic profiles of salmonid cell lines.
    • This approach is highly effective for verifying cell line identity and detecting cross-contamination.
    • Accurate cell line authentication is essential for ensuring the validity of research findings in fish cell culture.