Abstract
Background: A plethora of agents is in early stages of development for colorectal cancer (CRC), including those that target the insulin-like growth factor I receptor (IGFIR) pathway. In the current environment of numerous cancer targets, it is imperative that patient selection strategies be developed with the intent of preliminary testing in the latter stages of phase I trials. The goal of this study was to develop and characterize predictive biomarkers for an IGFIR tyrosine kinase inhibitor, OSI-906, that could be applied in CRC-specific studies of this agent. Methods: Twenty-seven CRC cell lines were exposed to OSI-906 and classified according to IC50 value as sensitive (≤1.5 μmol/L) or resistant (>5 μmol/L). Cell lines were subjected to immunoblotting and immunohistochemistry for effector proteins, IGFIR copy number by fluorescence in situ hybridization, KRAS/BRAF/phosphoinositide 3-kinase mutation status, and baseline gene array analysis. The most sensitive and resistant cell lines were used for gene array and pathway analyses, along with shRNA knockdown of highly ranked genes. The resulting integrated genomic classifier was then tested against eight human CRC explants in vivo. Results: Baseline gene array data from cell lines and xenografts were used to develop a k-top scoring pair (k-TSP) classifier, which, in combination with IGFIR fluorescence in situ hybridization and KRAS mutational status, was able to predict with 100% accuracy a test set of patient-derived CRC xenografts. Conclusions: These results indicate that an integrated approach to the development of individualized therapy is feasible and should be applied early in the development of novel agents, ideally in conjunction with late-stage phase I trials.
| Original language | English |
|---|---|
| Pages (from-to) | 3193-3204 |
| Number of pages | 12 |
| Journal | Clinical Cancer Research |
| Volume | 16 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2010 Jun 15 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Cancer Research
- Oncology
Cite this
Development of an integrated genomic classifier for a novel agent in colorectal cancer : Approach to individualized therapy in early development. / Pitts, Todd M.; Tan, Aik-Choon; Kulikowski, Gillian N.; Tentler, John J.; Brown, Amy M.; Flanigan, Sara A.; Leong, Stephen; Coldren, Christopher D.; Hirsch, Fred R.; Varella-Garcia, Marileila; Korch, Christopher; Eckhardt, S. Gail.
In: Clinical Cancer Research, Vol. 16, No. 12, 15.06.2010, p. 3193-3204.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Development of an integrated genomic classifier for a novel agent in colorectal cancer
T2 - Approach to individualized therapy in early development
AU - Pitts, Todd M.
AU - Tan, Aik-Choon
AU - Kulikowski, Gillian N.
AU - Tentler, John J.
AU - Brown, Amy M.
AU - Flanigan, Sara A.
AU - Leong, Stephen
AU - Coldren, Christopher D.
AU - Hirsch, Fred R.
AU - Varella-Garcia, Marileila
AU - Korch, Christopher
AU - Eckhardt, S. Gail
PY - 2010/6/15
Y1 - 2010/6/15
N2 - Background: A plethora of agents is in early stages of development for colorectal cancer (CRC), including those that target the insulin-like growth factor I receptor (IGFIR) pathway. In the current environment of numerous cancer targets, it is imperative that patient selection strategies be developed with the intent of preliminary testing in the latter stages of phase I trials. The goal of this study was to develop and characterize predictive biomarkers for an IGFIR tyrosine kinase inhibitor, OSI-906, that could be applied in CRC-specific studies of this agent. Methods: Twenty-seven CRC cell lines were exposed to OSI-906 and classified according to IC50 value as sensitive (≤1.5 μmol/L) or resistant (>5 μmol/L). Cell lines were subjected to immunoblotting and immunohistochemistry for effector proteins, IGFIR copy number by fluorescence in situ hybridization, KRAS/BRAF/phosphoinositide 3-kinase mutation status, and baseline gene array analysis. The most sensitive and resistant cell lines were used for gene array and pathway analyses, along with shRNA knockdown of highly ranked genes. The resulting integrated genomic classifier was then tested against eight human CRC explants in vivo. Results: Baseline gene array data from cell lines and xenografts were used to develop a k-top scoring pair (k-TSP) classifier, which, in combination with IGFIR fluorescence in situ hybridization and KRAS mutational status, was able to predict with 100% accuracy a test set of patient-derived CRC xenografts. Conclusions: These results indicate that an integrated approach to the development of individualized therapy is feasible and should be applied early in the development of novel agents, ideally in conjunction with late-stage phase I trials.
AB - Background: A plethora of agents is in early stages of development for colorectal cancer (CRC), including those that target the insulin-like growth factor I receptor (IGFIR) pathway. In the current environment of numerous cancer targets, it is imperative that patient selection strategies be developed with the intent of preliminary testing in the latter stages of phase I trials. The goal of this study was to develop and characterize predictive biomarkers for an IGFIR tyrosine kinase inhibitor, OSI-906, that could be applied in CRC-specific studies of this agent. Methods: Twenty-seven CRC cell lines were exposed to OSI-906 and classified according to IC50 value as sensitive (≤1.5 μmol/L) or resistant (>5 μmol/L). Cell lines were subjected to immunoblotting and immunohistochemistry for effector proteins, IGFIR copy number by fluorescence in situ hybridization, KRAS/BRAF/phosphoinositide 3-kinase mutation status, and baseline gene array analysis. The most sensitive and resistant cell lines were used for gene array and pathway analyses, along with shRNA knockdown of highly ranked genes. The resulting integrated genomic classifier was then tested against eight human CRC explants in vivo. Results: Baseline gene array data from cell lines and xenografts were used to develop a k-top scoring pair (k-TSP) classifier, which, in combination with IGFIR fluorescence in situ hybridization and KRAS mutational status, was able to predict with 100% accuracy a test set of patient-derived CRC xenografts. Conclusions: These results indicate that an integrated approach to the development of individualized therapy is feasible and should be applied early in the development of novel agents, ideally in conjunction with late-stage phase I trials.
UR - http://www.scopus.com/inward/record.url?scp=77953704937&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77953704937&partnerID=8YFLogxK
U2 - 10.1158/1078-0432.CCR-09-3191
DO - 10.1158/1078-0432.CCR-09-3191
M3 - Article
C2 - 20530704
AN - SCOPUS:77953704937
VL - 16
SP - 3193
EP - 3204
JO - Clinical Cancer Research
JF - Clinical Cancer Research
SN - 1078-0432
IS - 12
ER -