Transcriptomics

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A Longitudinal, Multi-omic Atlas Reveals the Emergence of a Spatially Organized Immunosuppressive Ecosystem in Resistant Melanoma [nCounter RNA]


ABSTRACT: This study employed the NanoString nCounter platform to perform targeted, quantitative molecular profiling of longitudinally collected FFPE tumor samples to elucidate molecular mechanisms underlying resistance to anti–PD-1 therapy. nCounter® Vantage 3D™ Single Nucleotide Variant assay was integrated using a solid tumor panel to screen 104 driver variants across 25 genes frequently mutated in solid tumors. We quantified the expression of 770 cancer-related mRNA transcripts to identify persistently activated oncogenic pathway signatures in non-responders, which were further complemented by quantitative profiling of 27 total and phosphoproteins using antibody–oligonucleotide conjugates for functional validation of pathway activity. To characterize the tumor microenvironment spatially, GeoMx Digital Spatial Profiler analysis was utilized to assess the distribution of 38 proteins across distinct histological regions, revealing an immunosuppressive spatial architecture associated with treatment resistance.

ORGANISM(S): Homo sapiens

PROVIDER: GSE317937 | GEO | 2026/01/31

REPOSITORIES: GEO

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