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Cell-free DNA Comprises an In Vivo Nucleosome Footprint that Informs Its Tissues-Of-Origin

Open access
Snyder, Matthew W., Kircher, Martin, Hill, Andrew J., Daza, Riza M., Shendure, Jay·2016·Cell

Abstract

Summary Nucleosome positioning varies between cell types. By deep sequencing cell-free DNA (cfDNA) isolated from circulating blood plasma, we generated maps of genome-wide in vivo nucleosome occupancy, and found that short cfDNA fragments harbor footprints of transcription factors. The cfDNA nucleosome occupancies correlate well with the nuclear architecture, gene structure and expression observed in cells, suggesting that they could indicate the cell-type of origin. Nucleosome spacing inferred from cfDNA in healthy individuals correlates most strongly with epigenetic features of lymphoid and myeloid cells, consistent with hematopoietic cell death as the normal source of cfDNA. We build on this observation to show how nucleosome footprints can be used to infer cell types contributing to cfDNA in pathological states such as cancer. Since this strategy does not rely on differing cfDNA and cellular DNA genotypes, it may enable the noninvasive monitoring of a much broader set of clinical conditions than currently possible.

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Metadata

Authors
Snyder, M. W., Kircher, M., Hill, A. J., Daza, R. M., & Shendure, J.
Venue
Cell
Publisher
Elsevier BV
Published
2016-01
Volume
164
Issue
1-2
Pages
57-68
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2239118478
Cited by
1,464
References
5
FWCI
42.82
Type
journal article
Language
en
Open access
bronze

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Snyder, M. W., Kircher, M., Hill, A. J., Daza, R. M., & Shendure, J. (2016). Cell-free DNA Comprises an In Vivo Nucleosome Footprint that Informs Its Tissues-Of-Origin. Cell. https://doi.org/10.1016/j.cell.2015.11.050

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