ArticleScientific reports2026
Study on the effects and mechanisms of M2 macrophages on PYCR1-promoted biological behavior of hepatocellular carcinoma cells.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In this study, we aimed to investigate the effects of PYCR1 and M2-type macrophages on the malignant behaviors of hepatocellular carcinoma (HCC) cells and determine the mechanisms underlying these effects. We induced M2 polarization of macrophages by treating THP-1 cells with interleukin-4 (IL-4) and interleukin-13 (IL-13) and cultured HCC cells with medium conditioned using these macrophages. This co-culture promoted cancer cell invasion, migration, and epithelial–mesenchymal transition, whereas knockdown of pyrroline-5-carboxylic acid reductase 1 (PYCR1) suppressed these malignant behaviors, as well as inhibiting cell proliferation. We further observed that co-culture with M2 macrophage-conditioned medium suppressed apoptosis and ferroptosis of HCC cells; again, PYCR1 knockdown reversed these alterations. In summary, conditioned medium derived from M2 macrophages mediates PYCR1-induced cell proliferation, apoptosis inhibition, and ferroptosis suppression in HCC, ultimately promoting progression of HCC through various signaling pathways. These results indicate the potential of PYCR1 as a therapeutic target for treatment of liver cancer.
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