Feedforward and feedback regulation of the MAPK and PI3K oscillatory circuit in breast cancer

Huizhong Hu, Alexey Goltsov, James L. Bown, Andrew H. Sims, Simon P. Langdon, David J. Harrison, Dana Faratian

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)


    Although the theoretical possibility of oscillations in MAPK signalling has long been described, experimental validation has proven more elusive. In this study we observed oscillations in MAPK and PI3K signalling in breast cancer cells in response to epidermal growth factor receptor-family stimulation. Using systems level analysis with a kinetic model, we demonstrate that receptor amplification, loss of transcriptional feedback, or pathway crosstalk, are responsible for oscillations in MAPK and PI3K signalling. Transcriptional profiling reveals architectural motifs likely to be responsible for feedback control of oscillations. Overexpression of the HER2 oncogene and inhibition of transcriptional feedback increase the amplitude of oscillations and provide experimental validation of the computational findings.
    Original languageEnglish
    Pages (from-to)26-32
    Number of pages7
    JournalCellular Signalling
    Issue number1
    Early online date18 Sep 2012
    Publication statusPublished - Jan 2013


    • HER2
    • Breast cancer
    • Oscillation
    • MAPK
    • PI3K
    • Systems biology


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