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Expression and function of Trk-C in favourable human neuroblastomas
D J Yamashiro1, X G Liu, C P Lee
1Division of Oncology, Children's Hospital of Philadelphia, Pennsylvania 19104-4318, USA.
European Journal of Cancer (Oxford, England : 1990)
|March 28, 1998
Summary
Neurotrophin receptor C (Trk-C) is expressed in favorable neuroblastomas, correlating with better survival and lower tumor stage. Its activation by NT-3 promotes cell survival and differentiation in these tumors.
Area of Science:
- Oncology
- Molecular Biology
- Neuroscience
Background:
- Neuroblastomas, a common pediatric cancer, exhibit differential expression of neurotrophin receptors.
- Trk-A expression is linked to favorable outcomes, while Trk-B is associated with MYCN-amplified, unfavorable tumors.
Purpose of the Study:
- To investigate the expression and functional role of neurotrophin receptor C (Trk-C) in human neuroblastomas.
- To determine the correlation between Trk-C expression, tumor stage, MYCN amplification, and patient survival.
Main Methods:
- Northern blot analysis was used to detect Trk-C mRNA expression in 55 primary neuroblastoma tumor samples.
- Functional studies involved transfecting cell lines to assess the effects of Trk-C activation by NT-3.
Main Results:
- Trk-C mRNA was detected in 25% (14/55) of primary neuroblastomas.
- Trk-C expression was significantly higher in lower-stage tumors (stages 1, 2, 4S) compared to higher-stage tumors (stages 3, 4) (P < 0.04).
- Trk-C expression showed a positive correlation with patient survival and a negative correlation with MYCN amplification. NT-3 stimulation promoted cell survival and differentiation.
Conclusions:
- Trk-C expression is associated with favorable neuroblastoma biology.
- Trk-C may play a role in promoting survival and differentiation in neuroblastoma, particularly in lower-stage tumors.
- These findings suggest Trk-C as a potential therapeutic target or biomarker for neuroblastoma.