American Association for Cancer Research
Browse

Supplementary Materials and Methods, Supplementary Table 1, and Supplementary Figures 1 through 14 from An <i>In Vivo</i> Reporter to Quantitatively and Temporally Analyze the Effects of CDK4/6 Inhibitor-Based Therapies in Melanoma

Download (2.64 MB)
journal contribution
posted on 2023-03-31, 00:24 authored by Jessica L.F. Teh, Timothy J. Purwin, Evan J. Greenawalt, Inna Chervoneva, Allison Goldberg, Michael A. Davies, Andrew E. Aplin
<p>Supplementary Materials and Methods. Supplemental Table 1. Summary of melanoma cell lines grouped for mutations in CDKN2A, CDK4, BRAF and NRAS. Supplemental Figure 1. Low concentrations of palbociclib inhibited phosphorylation of RB1 and cyclin A2 expression in sensitive cell lines but not in less sensitive lines. Supplemental Figure 2. Mean plasma concentration for palbociclib. Mice were treated with control chow or palbociclib for 8 or 15 days. Supplemental Figure 3. Sensitivity of melanoma cells to trametinib. GI50 values were generated from dose-dependent curves from MTT cell viability assays. Supplemental Figure 4. Enhanced PARP cleavage in BRAF and NRAS mutant cells treated with trametinib or trametinib plus palbociclib. Supplemental Figure 5. Clustergram and scatter plot generated from apoptosis PCR Array. Supplemental Figure 6. Endogenous levels of survivin in a panel of melanoma cell lines. Supplemental Figure 7. Representative tumor size of 1205Lu xenografts measured by tdTomato fluorescence activity. Supplemental Figure 8. Average weight (g) of mice bearing 1205Lu xenografts treated in each cohort. Supplemental Figure 9. Average weight (g) of mice bearing WM1366 xenografts treated in each cohort. Supplemental Figure 10. Modulation of E2F activity in combination treated mice bearing WM1366 xenografts that did not show complete response. Supplemental Figure 11. E2F reactivation in WM1366 xenografts precedes resistance to MEK inhibitor or CDK4/6 inhibitor as measured by tdTomato activity. Supplemental Figure 12. Residual tdTomato signal in 1205Lu tumors of mice showing complete response by lack of palpable tumor. Supplemental Figure 13. Two heat maps of the most significantly up (A) and down (B) regulated pathways for CDK-R vs MEK-R, Combo-R vs MEK-R and Combo-R vs CDKR. Supplemental Figure 14. Validation of proteins from the RPPA analysis heatmap in Figure 6.</p>

Funding

Melanoma Research Alliance

Pfizer

NIH

Dr. Miriam and Sheldon G. Adelson Medical Research Foundation

NCI

MD Anderson Cancer Center

History

ARTICLE ABSTRACT

Aberrant cell-cycle progression is a hallmark feature of cancer cells. Cyclin-dependent kinases 4 and 6 (CDK4/6) drive progression through the G1 stage of the cell cycle, at least in part, by inactivating the tumor suppressor, retinoblastoma. CDK4/6 are targetable and the selective CDK4/6 inhibitor, palbociclib, was recently FDA approved for the treatment of estrogen receptor–positive, HER2-negative advanced breast cancer. In cutaneous melanoma, driver mutations in NRAS and BRAF promote CDK4/6 activation, suggesting that inhibitors such as palbociclib are likely to provide therapeutic benefit in combination with BRAF inhibitors and/or MEK inhibitors that are FDA-approved. However, the determinants of the response to CDK4/6 inhibitors alone and in combination with other targeted inhibitors are poorly defined. Furthermore, in vivo systems to quantitatively and temporally measure the efficacy of CDK4/6 inhibitors and determine the extent that CDK activity is reactivated during acquired resistance are lacking. Here, we describe the heterogeneous effects of CDK4/6 inhibitors, the expression of antiapoptotic proteins that associate with response to CDK4/6 and MEK inhibitors, and the development of a luciferase-based reporter system to determine the effects of CDK4/6 inhibitors alone and in combination with MEK inhibitors in melanoma xenografts. These findings are likely to inform on-going and future clinical trials utilizing CDK4/6 inhibitors in cutaneous melanoma. Cancer Res; 76(18); 5455–66. ©2016 AACR.

Usage metrics

    Cancer Research

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC