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Growth of subcutaneous MC38 colorectal cancer triggers mild cachexia

GSE319517 Mus musculus (mouse) RNA-seq (gene expression) 8 samples Submitted 2026/07/03 Platform GPL34328
At a glance

RNA-seq (gene expression) · mouse · 8 samples

What it is
RNA-seq (gene expression)Gene activity measured by sequencing. The summary does not mention single-cell work, so this is most likely bulk: one average per sample, the usual starting point for comparing groups.
Organism
Mus musculus (mouse)
Samples
8 samples: 4 × Control vs 4 × scMC38Groups are read from the sample names, not from the paper. Check the list below.
Data you can get
A processed table (series matrix) and supplementary files from NCBI; the raw sequencing reads from ENA. Which of these hold counts depends on the study, so check the file list.
Summary (written by the submitters)
Colorectal cancer (CRC) frequently manifests with cancer cachexia. To model CRC‑associated cachexia, we implanted MC38 murine CRC cells subcutaneously into mice and evaluated skeletal muscle responses. Tumor‑bearing mice showed mild but significant wasting of both the quadriceps and gastrocnemius muscles (p < 0.05). Quadriceps RNA was profiled using poly(A)‑selected, stranded RNA‑seq.
Read the full summary ↓
Differential expression analysis (DESeq2) identified 616 significantly altered genes (|log2FC| ≥ 1, FDR < 0.05). Pathway enrichment revealed marked upregulation of neutrophil degranulation and inflammatory response programs, accompanied by downregulation of voltage‑gated potassium channel activity and potassium ion transport pathways. Together, these findings implicate heightened inflammatory/neutrophil‑associated signaling and reduced ion‑channel gene expression as key molecular features of skeletal muscle wasting in this CRC cachexia model. Raw FASTQ files and processed gene‑level counts are provided to support reuse and secondary analyses.
This dataset
Download · which file do I need?

Direct links to NCBI and ENA, no account and no request form. Pick by what you want to do: take the small processed table to look, the supplementary files to re-analyse, or the original raw data to start over.

1 · Just have a look

Processed table

The series matrix: one table of values per sample as the submitters processed it. The smallest download, and it opens in Excel or R. Start here to see what the data look like.

2 · Re-analyse it

Supplementary files

The count tables and other files the authors uploaded. Take only the samples you need, or the whole study as GSE319517_RAW.tar (it can run to tens of gigabytes).

3 · Start from the raw reads

Raw sequencing reads

The original FASTQ files, straight from the sequencer, held at ENA. Large, and you align them yourself, so only choose this if you need to re-process the study from scratch.

What the files usually look like: For RNA-seq the counts are usually a table among the supplementary files (look for 'counts', 'expression', 'FPKM' or 'TPM' in the file name). The series matrix of a sequencing study is sometimes nearly empty.

Also filed as BioProject PRJNA1423661 and SRA study SRP677051. Searching any of these in the dataset finder brings you back here.

Study design
4 × Control vs 4 × scMC38

Supports a between-group comparison across 8 samples.

How we read this: 2 replicated groups read from 8 sample titles; they account for 8 of them. These groups are guessed from the sample names, not taken from the paper, so check them against the sample list below before relying on them.

Samples in this study
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Metadata from NCBI GEO, cached and refreshed periodically — the NCBI page above is authoritative. Downloads link straight to NCBI/ENA; nothing is proxied through BioTransfer.