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Related Experiment Videos

Evidence that TSG101 aberrant transcripts are PCR artifacts

M Hampl1, J Hampl, J Plaschke

  • 1Department of General/Thoracic and Vascular Surgery, Technical University of Dresden, Germany.

Biochemical and Biophysical Research Communications
|August 15, 1998
PubMed
Summary
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The tumor suppressor gene 1 (TSG101) gene

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Previous studies suggested aberrant transcripts of the tumor suppressor gene 1 (TSG101) in various cancers.
  • The underlying mechanism was hypothesized to be aberrant splicing.
  • Inconsistencies in existing TSG101 data prompted a re-evaluation.

Purpose of the Study:

  • To re-evaluate the occurrence and nature of TSG101 transcripts in tumor and normal tissues.
  • To investigate the proposed aberrant splicing mechanism for TSG101 transcript formation.
  • To determine the origin of observed TSG101 cDNA aberrant transcripts.

Main Methods:

  • Analysis of TSG101 gene expression in 80 tumor samples (breast, brain, colon, neuroectodermal) and 37 normal tissues.
  • RT-nested PCR was employed to detect and amplify TSG101 cDNA transcripts.

Related Experiment Videos

  • Investigation of deletion breakpoints, splice site conformity, insertions, and reproducibility of PCR results.

    • Main Results:

    • TSG101 cDNA aberrant transcripts were detected.
    • Observations contradicted the aberrant splicing theory, including deletion breakpoints within exons and non-conforming splice sites.
    • Nonreproducible PCR results, insertions, and generation of deleted transcripts from full-length products were observed.
    • Reamplification of full-length TSG101 cDNA products led to the generation of deleted transcripts.

    Conclusions:

    • The study provides the first evidence that acquired TSG101 transcripts are artifacts of the PCR process.
    • The aberrant splicing theory for TSG101 transcript formation is not supported by these findings.
    • Re-evaluation of TSG101 data is crucial, highlighting the impact of PCR artifacts in molecular studies.