ArticleJACS Au2025
LA-ICP-TOFMS Imaging Reveals Significant Influence of Cancer Cell Resistance on Oxaliplatin Compartmentalization in the Tumor Microenvironment.
Article in JACS Au, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Intracellular and Extracellular Platinum Quantification at Single-Cell Scale with LA-ICP-TOFMS.ACS omega · 2026Article
- A Barcoding Strategy for Pooled Single-Cell LA-ICP-TOFMS Analysis of Metal-Containing Therapeutics.Analytical chemistry · 2026Article
- Potentiation of a Porous Silicon Therapeutic Vaccine in Colorectal Cancer via Oxaliplatin-Mediated Regulation of Myeloid-Driven Immunosuppression.Journal of functional biomaterials · 2026Article
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Authors and funding
5 authors.
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Abstract
Chemoresistance in cancer cells, particularly in refractory types, such as colorectal cancer, poses a major challenge to effective treatment. In particular, the interaction between cancer cells and the tumor microenvironment (TME) has been shown to exert substantial influence on the efficacy of therapeutic agents. This study investigated whether an intrinsic resistance phenotype alters drug distribution in the TME using xenograft models derived from HCT116 colorectal cancer cells, including oxaliplatin (OxPt)-sensitive and OxPt-resistant (OxR) variants. Tumors were prepared as formalin-fixed paraffin-embedded (FFPE) sections, followed by single-cell analysis with laser ablation inductively coupled plasma time-of-flight mass spectrometry (LA-ICP-TOFMS). Based on histological evaluations, a panel of metal-conjugated antibodies was designed to target tissue architecture and distinct cell states within the TME. A dedicated calibration strategy was applied to accurately measure platinum (Pt) uptake in phenotypically defined single cells across both the tumor and its microenvironment. The results revealed substantial structural differences: HCT116/OxR tumors exhibited robust growth following drug administration, while parental tumors displayed extensive degradation. Notably, OxPt accumulated significantly in necrotic regions specific to HCT116/OxR, indicating resistance-dependent changes in drug compartmentalization. These findings suggest that an intrinsically resistant cancer cell phenotype is capable of markedly altering metal distributions within the TME.
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