Tumor IGF‐II content in a patient with a colon adenocarcinoma correlates with abnormal expression of the gene
International Journal of CancerPublished 30 July 1991
Sylvie Lambert, R. Gol-Winkler, Julien Collette, Jacqueline H. Gillis, P Franchimont, Claude Desaive
Citations23
SJR quartileQ1
SJR score2.25
SNIP1.76
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TL;DR
The results show that the very high IGF‐II level produced by the tumor does not Influence the seric concentration of the growth factor.
Abstract
We have recently reported abnormal insulin-like growth factor-II (IGF-II) mRNA levels in a number of human colorectal adenocarcinomas. Using an IGF-II radioimmunoassay, we have now detected high levels of both 10-kDa and 7.5-kDa IGF-II species (2,370 ng/g) in a right colon tumor showing a 800-fold IGF-II gene over-expression in comparison to the normal adjacent tissue. The higher-molecular-mass form represents 74% of the total immunoreactive IGF-II detected in the tumor. This form appears to be less reactive in the radioreceptor assay than in the radioimmunoassay. The insulin-like growth factor-I (IGF-I) concentration in the tumor is low. The patient's pre-operative serum IGF-II level is not increased and the proportion of the 10-kDa species is normal. In addition, the IGF-II/IGF-I ratio is 3 in the serum and 308 in the tumor. Our results show that the very high IGF-II level produced by the tumor does not influence the seric concentration of the growth factor.
Keywords
MedicineBiochemistry, Genetics and Molecular Biology
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