Abstract
Background: Recently, the importance of the interactions between liver cancer cells and fibroblasts has been increasingly recognized; however, many details remain to be explored.
Methods: In this work, we first studied their intercellular interactions using conditioned medium from mouse embryonic fibroblasts (MEFs), then through a previously established coculture model.
Results: Culturing in a conditioned medium from MEFs could significantly increase the growth, migration, and invasion of liver cancer cells. The coculture model further demonstrated that a positive feedback loop was formed between transforming growth factor-β (TGF-β) from HepG2 cells and mHGF (mouse hepatocyte growth factor) from MEFs during coculture. In this feedback loop, c-Met expression in HepG2 cells was significantly increased, and its downstream signaling pathways, such as Src/FAK, PI3K/AKT, and RAF/MEK/ERK, were activated. Moreover, the proportion of activated MEFs was also increased. More importantly, the growth-promoting effects caused by the interaction of these two cell types were validated in vitro by a 3D spheroid growth assay and in vivo by a xenograft mouse model.
Conclusion: Collectively, these findings provide valuable insights into the interactions between fibroblasts and liver cancer cells, which may have therapeutic implications for the treatment of liver cancer.
Graphical Abstract
[http://dx.doi.org/10.3322/caac.21660] [PMID: 33538338]
[http://dx.doi.org/10.21037/hbsn-20-480] [PMID: 32832496]
[http://dx.doi.org/10.1159/000509424] [PMID: 33442540]
[http://dx.doi.org/10.1016/j.jhep.2019.06.001] [PMID: 31195064]
[http://dx.doi.org/10.1146/annurev-pathol-052016-100322] [PMID: 27959632]
[http://dx.doi.org/10.1016/j.jhep.2019.11.006] [PMID: 31954486]
[http://dx.doi.org/10.1016/j.jcmgh.2020.09.003] [PMID: 32932015]
[http://dx.doi.org/10.2174/1568026622666220615152647] [PMID: 35708087]
[http://dx.doi.org/10.1134/S0006297917080016] [PMID: 28941454]
[http://dx.doi.org/10.3390/ijms20071723] [PMID: 30959975]
[http://dx.doi.org/10.7150/ijbs.72367] [PMID: 35982891]
[http://dx.doi.org/10.1111/cas.13156] [PMID: 28064454]
[http://dx.doi.org/10.1038/s41388-021-01863-w] [PMID: 34145400]
[http://dx.doi.org/10.1080/10408363.2019.1653821] [PMID: 31512514]
[http://dx.doi.org/10.1016/j.cyto.2016.12.025] [PMID: 28094206]
[http://dx.doi.org/10.3389/fcell.2020.00152] [PMID: 32435640]
[http://dx.doi.org/10.1038/s41467-021-24367-3] [PMID: 34210960]
[http://dx.doi.org/10.1007/978-3-030-47189-7_2] [PMID: 33123991]
[http://dx.doi.org/10.3390/jpm11100983] [PMID: 34683124]
[http://dx.doi.org/10.2183/pjab.86.588] [PMID: 20551596]
[http://dx.doi.org/10.3390/cancers9040035] [PMID: 28420162]
[http://dx.doi.org/10.1002/ptr.7573] [PMID: 35867025]
[http://dx.doi.org/10.1177/1758834011422556] [PMID: 22128289]
[http://dx.doi.org/10.3389/fcell.2020.00055] [PMID: 32117981]
[http://dx.doi.org/10.1002/hep.29496] [PMID: 28862760]
[http://dx.doi.org/10.1159/000504806] [PMID: 31846974]
[http://dx.doi.org/10.1016/j.diff.2016.07.001] [PMID: 27591095]
[http://dx.doi.org/10.1038/s41575-020-00372-7] [PMID: 33128017]
[http://dx.doi.org/10.1165/rcmb.2020-0143OC] [PMID: 32668192]
[http://dx.doi.org/10.1038/ncomms1734] [PMID: 22415826]
[http://dx.doi.org/10.1038/nrneph.2016.48] [PMID: 27108839]
[http://dx.doi.org/10.3390/biom10030487] [PMID: 32210029]
[http://dx.doi.org/10.3390/ijms20112767] [PMID: 31195692]
[http://dx.doi.org/10.1016/j.molmed.2019.06.007] [PMID: 31353124]
[http://dx.doi.org/10.3109/08977194.2011.595714] [PMID: 21740331]
[http://dx.doi.org/10.1038/s41571-021-00546-5] [PMID: 34489603]
[http://dx.doi.org/10.1038/s41568-019-0238-1] [PMID: 31980749]
[http://dx.doi.org/10.1038/s41388-022-02487-4] [PMID: 36217026]
[http://dx.doi.org/10.1080/15548627.2019.1580105] [PMID: 30786811]
[http://dx.doi.org/10.1152/physrev.00048.2019] [PMID: 32466724]
[http://dx.doi.org/10.1098/rsos.181006] [PMID: 30662724]
[http://dx.doi.org/10.1093/nar/gkx247] [PMID: 28407145]
[http://dx.doi.org/10.1177/1535370219898141] [PMID: 31924111]
[http://dx.doi.org/10.1038/s41598-021-03390-w] [PMID: 34903806]
[PMID: 27508192]