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IR/IGF1R signaling as potential target for treatment of high-grade osteosarcoma.

Kuijjer ML, Peterse EF, van den Akker BE, Briaire-de Bruijn IH, Serra M, Meza-Zepeda LA, Myklebost O, Hassan AB, Hogendoorn PC, Cleton-Jansen AM - BMC Cancer (2013)

Bottom Line: This pathway plays a key role in the growth and development of bone.Inhibitory effects of this drug were measured by Western blotting and cell proliferation assays.OSI-906 had a strong inhibitory effect on proliferation of 3 of 4 osteosarcoma cell lines, with IC₅₀s below 100 nM at 72 hrs of treatment.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Pathology, Leiden University Medical Center, Albinusdreef 2, Leiden 2300RC, the Netherlands.

ABSTRACT

Background: High-grade osteosarcoma is an aggressive tumor most often developing in the long bones of adolescents, with a second peak in the 5th decade of life. Better knowledge on cellular signaling in this tumor may identify new possibilities for targeted treatment.

Methods: We performed gene set analysis on previously published genome-wide gene expression data of osteosarcoma cell lines (n=19) and pretreatment biopsies (n=84). We characterized overexpression of the insulin-like growth factor receptor (IGF1R) signaling pathways in human osteosarcoma as compared with osteoblasts and with the hypothesized progenitor cells of osteosarcoma - mesenchymal stem cells. This pathway plays a key role in the growth and development of bone. Since most profound differences in mRNA expression were found at and upstream of the receptor of this pathway, we set out to inhibit IR/IGF1R using OSI-906, a dual inhibitor for IR/IGF1R, on four osteosarcoma cell lines. Inhibitory effects of this drug were measured by Western blotting and cell proliferation assays.

Results: OSI-906 had a strong inhibitory effect on proliferation of 3 of 4 osteosarcoma cell lines, with IC₅₀s below 100 nM at 72 hrs of treatment. Phosphorylation of IRS-1, a direct downstream target of IGF1R signaling, was inhibited in the responsive osteosarcoma cell lines.

Conclusions: This study provides an in vitro rationale for using IR/IGF1R inhibitors in preclinical studies of osteosarcoma.

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Inhibition of osteosarcoma cell lines with OSI-906. Osteosarcoma cell lines were inhibited with different concentrations of OSI-906, for 72 (gray line) or 96 (black line) hours. OHS (A), KPD (B), and SAOS2 (C) showed a dose-dependent inhibition, while 143B (D) did not respond to OSI-906.
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Figure 4: Inhibition of osteosarcoma cell lines with OSI-906. Osteosarcoma cell lines were inhibited with different concentrations of OSI-906, for 72 (gray line) or 96 (black line) hours. OHS (A), KPD (B), and SAOS2 (C) showed a dose-dependent inhibition, while 143B (D) did not respond to OSI-906.

Mentions: In 3 of 4 osteosarcoma cell lines tested, inhibition with OSI-906 was dose-dependent (Figure 4). Except for a toxic response at the maximum dose of 10 μM (Additional file 4), there was no effect on 143B. Because of this toxicity, relative IC50s were determined using measurements until 1 μM. OHS, SAOS2, and KPD had an IC50 of 25 nM, 92 nM, and 90 nM at 72h, respectively, and of 37 nM, 57 nM, and 23 nM at 96h of inhibition, respectively. At 1 μM OSI-906, approximately 60% of proliferation of OHS, SAOS2, and KPD cells was inhibited, while 143B proliferation was not inhibited (Figure 4).


IR/IGF1R signaling as potential target for treatment of high-grade osteosarcoma.

Kuijjer ML, Peterse EF, van den Akker BE, Briaire-de Bruijn IH, Serra M, Meza-Zepeda LA, Myklebost O, Hassan AB, Hogendoorn PC, Cleton-Jansen AM - BMC Cancer (2013)

Inhibition of osteosarcoma cell lines with OSI-906. Osteosarcoma cell lines were inhibited with different concentrations of OSI-906, for 72 (gray line) or 96 (black line) hours. OHS (A), KPD (B), and SAOS2 (C) showed a dose-dependent inhibition, while 143B (D) did not respond to OSI-906.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3672007&req=5

Figure 4: Inhibition of osteosarcoma cell lines with OSI-906. Osteosarcoma cell lines were inhibited with different concentrations of OSI-906, for 72 (gray line) or 96 (black line) hours. OHS (A), KPD (B), and SAOS2 (C) showed a dose-dependent inhibition, while 143B (D) did not respond to OSI-906.
Mentions: In 3 of 4 osteosarcoma cell lines tested, inhibition with OSI-906 was dose-dependent (Figure 4). Except for a toxic response at the maximum dose of 10 μM (Additional file 4), there was no effect on 143B. Because of this toxicity, relative IC50s were determined using measurements until 1 μM. OHS, SAOS2, and KPD had an IC50 of 25 nM, 92 nM, and 90 nM at 72h, respectively, and of 37 nM, 57 nM, and 23 nM at 96h of inhibition, respectively. At 1 μM OSI-906, approximately 60% of proliferation of OHS, SAOS2, and KPD cells was inhibited, while 143B proliferation was not inhibited (Figure 4).

Bottom Line: This pathway plays a key role in the growth and development of bone.Inhibitory effects of this drug were measured by Western blotting and cell proliferation assays.OSI-906 had a strong inhibitory effect on proliferation of 3 of 4 osteosarcoma cell lines, with IC₅₀s below 100 nM at 72 hrs of treatment.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Pathology, Leiden University Medical Center, Albinusdreef 2, Leiden 2300RC, the Netherlands.

ABSTRACT

Background: High-grade osteosarcoma is an aggressive tumor most often developing in the long bones of adolescents, with a second peak in the 5th decade of life. Better knowledge on cellular signaling in this tumor may identify new possibilities for targeted treatment.

Methods: We performed gene set analysis on previously published genome-wide gene expression data of osteosarcoma cell lines (n=19) and pretreatment biopsies (n=84). We characterized overexpression of the insulin-like growth factor receptor (IGF1R) signaling pathways in human osteosarcoma as compared with osteoblasts and with the hypothesized progenitor cells of osteosarcoma - mesenchymal stem cells. This pathway plays a key role in the growth and development of bone. Since most profound differences in mRNA expression were found at and upstream of the receptor of this pathway, we set out to inhibit IR/IGF1R using OSI-906, a dual inhibitor for IR/IGF1R, on four osteosarcoma cell lines. Inhibitory effects of this drug were measured by Western blotting and cell proliferation assays.

Results: OSI-906 had a strong inhibitory effect on proliferation of 3 of 4 osteosarcoma cell lines, with IC₅₀s below 100 nM at 72 hrs of treatment. Phosphorylation of IRS-1, a direct downstream target of IGF1R signaling, was inhibited in the responsive osteosarcoma cell lines.

Conclusions: This study provides an in vitro rationale for using IR/IGF1R inhibitors in preclinical studies of osteosarcoma.

Show MeSH
Related in: MedlinePlus