Monocytes acquire prostate cancer specific chromatin conformations upon indirect co-culture with prostate cancer cells

Alshaker, Heba, Hunter, Ewan, Salter, Matthew, Ramadass, Aroul, Westra, Willem, Winkler, Mathias, Green, Jayne, Akoulitchev, Alexandre and Pchejetski, Dmitri (2022) Monocytes acquire prostate cancer specific chromatin conformations upon indirect co-culture with prostate cancer cells. Frontiers in Oncology, 12. ISSN 2234-943X

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Background: Three-dimensional chromosome loop conformations are powerful regulators of gene expression. These chromosome conformations can be detected both in tumour and in circulating cells and have significant disease biomarker potential. We have recently detected specific chromosome conformations in circulating cells of patients with prostate cancer (PCa) which were similar to ones found in their primary tumours, however, the possibility of horizontal transfer of chromosome conformations was not studied previously. Methods: Human monocytes (U937) were co-cultured in Boyden chambers through 0.4 uM membrane with or without PC-3 human PCa cells or their conditioned media and a custom DNA microarray for 900,000 chromosomal loops covering all coding loci and non-coding RNA genes was performed on each part of the co-culture system. Results: We have detected 684 PC-3 cell-specific chromosome conformations across the whole genome that were absent in naïve monocytes but appeared in monocytes co-cultured with PC-3 cells or with PC-3-conditioned media. Comparing PC3-specific conformations to the ones we have previously detected in systemic circulation of high-risk PCa patients revealed 9 positive loops present in both settings. Conclusions: Our results demonstrate for the first time a proof of concept for horizontal transfer of chromosome conformations without direct cell-cell contact. This carries high clinical relevance as we have previously observed chromatin conformations in circulating cells of patients with melanoma and PCa similar to ones in their primary tumours. These changes can be used as highly specific biomarkers for diagnosis and prognosis. Further studies are required to elucidate the specific mechanism of chromosome conformations transfer and its clinical significance in particular diseases.

Item Type: Article
Additional Information: Funding Information: This work was funded by Oxford BioDynamics.
Uncontrolled Keywords: 3c,blood test,horizontal gene transfer,nucleome,prostate cancer,oncology,cancer research,sdg 3 - good health and well-being ,/dk/atira/pure/subjectarea/asjc/2700/2730
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
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Depositing User: LivePure Connector
Date Deposited: 03 Oct 2022 11:31
Last Modified: 22 Oct 2022 07:58
DOI: 10.3389/fonc.2022.990842

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