Increased GRP Receptor Expression in Tumors and Sensitivity to SP-G
Author Information
Author(s): C M Waters, A C MacKinnon, J Cummings, U Tufail-Hanif, D Jodrell, C Haslett, T Sethi
Primary Institution: University of Edinburgh Medical School
Hypothesis
Does increased gastrin-releasing peptide receptor expression in tumor cells confer sensitivity to SP-G-induced growth inhibition?
Conclusion
The study found that GRP receptor expression predicts sensitivity to SP-G in various tumors, suggesting a potential therapeutic strategy for neuropeptide-expressing tumors.
Supporting Evidence
- SP-G inhibited calcium mobilization induced by various neuropeptides in SCLC cell lines.
- GRP receptor expression increased significantly in resistant cell lines compared to sensitive ones.
- SP-G showed marked in vivo xenograft activity in various tumors including lung and colon cancer.
Takeaway
This study shows that tumors with more GRP receptors are more likely to be affected by a specific cancer treatment called SP-G.
Methodology
The study measured GRP receptor expression using RT-PCR and assessed sensitivity to SP-G in various tumor cell lines and xenografts.
Limitations
The study does not confirm the expression of fully functional receptors.
Statistical Information
P-Value
0.026
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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