PAX7 expression in embryonal rhabdomyosarcoma suggests an origin in muscle satellite cells
Author Information
Author(s): Tiffin N, Williams R D, Shipley J, Pritchard-Jones K
Primary Institution: Institute of Cancer Research
Hypothesis
The mechanism of enhanced PAX3 and/or PAX7 activity will vary according to whether the tumour contains a PAX3/7-FKHR fusion gene.
Conclusion
Elevated PAX7 expression in embryonal rhabdomyosarcoma suggests that these tumors may originate from myogenic satellite cells.
Supporting Evidence
- PAX3 and PAX7 expression levels were measured in 34 primary RMS tumors.
- Elevated PAX7 expression was mainly found in tumors lacking PAX3/7-FKHR fusion genes.
- All RMS samples with no known translocation expressed MET mRNA.
Takeaway
This study found that a type of childhood muscle cancer, called rhabdomyosarcoma, may come from special muscle cells that help muscles grow and heal.
Methodology
Real-time PCR was used to measure mRNA levels for wild-type PAX3, PAX7, PAX3-FKHR, and PAX7-FKHR in primary RMS samples.
Limitations
The study did not include a detailed analysis of the adult-type pleomorphic rhabdomyosarcoma samples.
Participant Demographics
The study focused on primary rhabdomyosarcoma samples from children.
Digital Object Identifier (DOI)
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