Linsitinib (OSI-906)

(A) MHM cells were treated with CP (10 μM) alone or in combination with OSI-906 (5 μM) or Erlotinib (10 μM) for 48 hours and lysates were immunoblotted with indicated antibodies. EGFR immuno-precipitates were probed with anti-phospho tyrosine antibody. In lanes marked “Serum Starved”, MHM cells were serum starved for 24 hours and stimulated with EGF (10 ng/ml) for 10 minutes. Lysates were collected and immunoblotted with indicated antibodies. (B) OS cell lines and primary OS cells were treated with CP (10 μM) alone, OSI-906 (5 μM) alone or with CP in combination with OSI-906 for 48 hours and whole cell lysates were immunoblotted with the indicated antibodies. (C) MHM and S4 (CP resistant MHM derivatives) cells were treated with CP (10 μM) alone or in combination with OSI-906 (5 μM) for 48 hours and lysates were immunoblotted with indicated antibodies. (D) IGF1 and IGF2 mRNA levels in untreated cells and cells treated with 10 μM CP for 48 hours were determined by qRT-PCR. The level of each mRNA transcript in untreated cells was considered “1.0” and all the other values were plotted relative to it. Shown are the mean results of three experiments, bars, Standard error (SE).

Oncotarget, 2016, 7(19):27511-26. Linsitinib (OSI-906) purchased from Selleck.

(A) CLL B cells purified from freshly isolat ed or freeze-thawed PBMCs from CLL patient samples were treated with a single dose of 15 µM AG1024, 1µM PPP or 1µM linsitinib for 24h and cell survival was determined by flow cytometry. Results are shown as mean  ± SEM, n=20. (B)CLL B cells purified from freshly isolat ed or freeze-thawed PBMCs from CLL patient samples were treated with a single dose of 15 µM AG1024 (AG) or 1µM linsitinib (L) and immunoblotted for the expression of phosphorylated IGF1R and IRS-1 (n=6). (C) CLL B cells purified from freshly isolat ed or freeze-thawed PBMCs from CLL patient samples were treated with a single dose of 1µM PPP and immunoblotted for the expression of phosphorylated IGF1R and IRS-1 (n=4). (D) CLL B cells purified from freshly isolated or freeze-thawed PBMCs from CLL patient samples were treated with 5-15 µM AG1024 and subject to a Western blot analysis using the indicated antibodies. Results are represented as mean±SEM (n=10). Supplementary Figure 1C shows the associated densitometrical analysis after treatment with 15 µM AG1024. (E) CLL B cells purified from freshly isolat ed or freeze-thawed PBMCs from CLL patient samples were treated with 10-500nM rhIGF-1 and immunoblotted for the expression of IGF1R, pIGF1R, pAkt, Akt, pERK and Erk. A representative example from four independent experiments is shown.

Linsitinib (OSI-906) purchased from Selleck.