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Differential phase register of Hes1 oscillations with mitoses underlies cell-cycle heterogeneity in ER+ breast cancer cells

View ORCID ProfileNitin Sabherwal, Andrew Rowntree, Elli Marinopoulou, Tom Pettini, Sean Hourihane, Riba Thomas, Jochen Kursawe, Ximena Soto, Nancy Papalopulu
doi: https://doi.org/10.1101/2021.01.04.425227
Nitin Sabherwal
1Division of Developmental Biology and Medicine, School of Medical Sciences, Faculty of Biology, Medicine and Health (FBMH), The University of Manchester, Oxford Road, Manchester, M13 9PT, UK
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  • For correspondence: Nitin.Sabherwal@manchester.ac.uk Nancy.Papalopulu@manchester.ac.uk
Andrew Rowntree
1Division of Developmental Biology and Medicine, School of Medical Sciences, Faculty of Biology, Medicine and Health (FBMH), The University of Manchester, Oxford Road, Manchester, M13 9PT, UK
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Elli Marinopoulou
1Division of Developmental Biology and Medicine, School of Medical Sciences, Faculty of Biology, Medicine and Health (FBMH), The University of Manchester, Oxford Road, Manchester, M13 9PT, UK
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Tom Pettini
1Division of Developmental Biology and Medicine, School of Medical Sciences, Faculty of Biology, Medicine and Health (FBMH), The University of Manchester, Oxford Road, Manchester, M13 9PT, UK
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Sean Hourihane
1Division of Developmental Biology and Medicine, School of Medical Sciences, Faculty of Biology, Medicine and Health (FBMH), The University of Manchester, Oxford Road, Manchester, M13 9PT, UK
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Riba Thomas
1Division of Developmental Biology and Medicine, School of Medical Sciences, Faculty of Biology, Medicine and Health (FBMH), The University of Manchester, Oxford Road, Manchester, M13 9PT, UK
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Jochen Kursawe
2School of Mathematics and Statistics, University of St Andrews, St Andrews, KY16 9SS, UK
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Ximena Soto
1Division of Developmental Biology and Medicine, School of Medical Sciences, Faculty of Biology, Medicine and Health (FBMH), The University of Manchester, Oxford Road, Manchester, M13 9PT, UK
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Nancy Papalopulu
1Division of Developmental Biology and Medicine, School of Medical Sciences, Faculty of Biology, Medicine and Health (FBMH), The University of Manchester, Oxford Road, Manchester, M13 9PT, UK
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  • For correspondence: Nitin.Sabherwal@manchester.ac.uk Nancy.Papalopulu@manchester.ac.uk
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Abstract

Here, we study the dynamical expression of endogenously labelled Hes1, a transcriptional repressor implicated in controlling cell proliferation, to understand how cell-cycle length heterogeneity is generated in ER+ breast cancer cells. We find that Hes1 shows oscillatory expression with approximately 25h periodicity and during each cell-cycle has a variable peak in G1, a trough around G1-S transition and a less variable second peak in G2/M. Compared to other subpopulations, the cell-cycle in CD44HighCD24Low cancer stem cells is longest and most variable. Most cells divide around the peak of the Hes1 expression wave but preceding mitoses in slow dividing CD44HighCD24Low cells appear phase-shifted, resulting in a late-onset Hes1 peak in G1. The position, duration and shape of this peak, rather than the Hes1 expression levels, are good predictors of cell-cycle length. Diminishing Hes1 oscillations by enforcing sustained expression slows down the cell-cycle, impairs proliferation, abolishes the dynamic expression of p21, and increases the percentage of CD44HighCD24Low cells. Reciprocally, blocking the cell-cycle causes an elongation of Hes1 periodicity, suggesting a bidirectional interaction of the Hes1 oscillator and the cell-cycle. We propose that Hes1 oscillations are functionally important for the efficient progression of the cell-cycle and that the position of mitosis in relation to the Hes1 wave underlies cell-cycle length heterogeneity in cancer cell subpopulations.

Significance statement Tumours exhibit heterogeneities that are not due to mutations, including Cancer Stem Cells with different potencies. We show that the cancer stem cell state predisposed to dormancy in vivo has a highly variable and long cell-cycle. Using single-cell live-imaging for the transcriptional repressor Hes1 (a key molecule in cancer), we show a new type of circadian-like oscillatory expression of Hes1 in all cells in the population. The most potent cancer stem cells tend to divide around the trough of the Hes1 oscillatory wave, a feature predictive of a long cell-cycle. A novel concept proposed here is that the position of cell division with respect to the Hes1 wave is predictive of its prospective cell-cycle length and cancer cellular sub-state.

Competing Interest Statement

The authors have declared no competing interest.

Footnotes

  • ↵! Joint first authors

  • https://github.com/AndyRowntree/Phase-register-of-Hes1-oscillations-with-mitoses-underlies-cell-cycle-heterogeneity

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted July 24, 2021.
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Differential phase register of Hes1 oscillations with mitoses underlies cell-cycle heterogeneity in ER+ breast cancer cells
Nitin Sabherwal, Andrew Rowntree, Elli Marinopoulou, Tom Pettini, Sean Hourihane, Riba Thomas, Jochen Kursawe, Ximena Soto, Nancy Papalopulu
bioRxiv 2021.01.04.425227; doi: https://doi.org/10.1101/2021.01.04.425227
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Differential phase register of Hes1 oscillations with mitoses underlies cell-cycle heterogeneity in ER+ breast cancer cells
Nitin Sabherwal, Andrew Rowntree, Elli Marinopoulou, Tom Pettini, Sean Hourihane, Riba Thomas, Jochen Kursawe, Ximena Soto, Nancy Papalopulu
bioRxiv 2021.01.04.425227; doi: https://doi.org/10.1101/2021.01.04.425227

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