European Journal of Medical Research · 4 authors, 3 centres
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This preclinical study analyzed multiple datasets and performed experiments to show that the gene ABCA1 is overexpressed in glioma and temozolomide-resistant cells, and that its higher expression is associated with poorer patient survival and increased infiltration of pro-tumor M2 macrophages.
The study used multi-omics bioinformatics analysis and experimental validation in glioma cell lines to investigate the role of the drug metabolism-related gene ABCA1. Researchers found ABCA1 mRNA and protein are significantly overexpressed in glioma tissues versus normal brain tissue, with high expression correlating with poor survival prognosis. Functional experiments in temozolomide-resistant glioma cells (U118-R and T98G-R) demonstrated that ABCA1 knockdown reduced clone formation, impaired cell survival, and increased cell death, particularly when combined with temozolomide treatment. The study also found ABCA1 expression positively correlates with M2 macrophage infiltration and associated immune molecules like IL-10. The authors conclude that ABCA1 overexpression contributes to temozolomide chemoresistance and a pro-tumor immune microenvironment, suggesting ABCA1 inhibition could be a therapeutic strategy. Limitations include that the immunological correlation requires further experimental confirmation in vivo and in vitro.
