Evidence map›Paper›PMID 42479224›Full record

ArticleMolecular biology reports2026

Single-cell RNA sequencing of circulating tumour cells in colorectal cancer.

Sai Shyam Vasantharajan, Priyadarshana Ajithkumar, Kit Moloney-Geany, Hannah O'Neill, Euan J Rodger, Sharon Pattison, Gregory Gimenez, Aniruddha Chatterjee

Abstract read
In one paragraph

Article in Molecular biology 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.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Sai Shyam VasantharajanDepartment of Pathology and Molecular Medicine, Faculty of Medicine, University of Otago, Ōtākou Whakaihu Waka, PO Box 56, Hercus Building, Cnr Great King & Hanover Streets, Otago, 9054, Dunedin, New Zealand.
Priyadarshana AjithkumarDepartment of Pathology and Molecular Medicine, Faculty of Medicine, University of Otago, Ōtākou Whakaihu Waka, PO Box 56, Hercus Building, Cnr Great King & Hanover Streets, Otago, 9054, Dunedin, New Zealand.
Kit Moloney-GeanyDepartment of Biochemistry, Faculty of Biomedical Sciences, University of Otago, Ōtākau Whakaihu Waka, PO Box 56, 710 Cumberland St, 9016, Dunedin, New Zealand.
Hannah O'Neill, Number 1 Fertility, Melbourne, Australia.
Euan J RodgerDepartment of Pathology and Molecular Medicine, Faculty of Medicine, University of Otago, Ōtākou Whakaihu Waka, PO Box 56, Hercus Building, Cnr Great King & Hanover Streets, Otago, 9054, Dunedin, New Zealand.
Sharon PattisonDepartment of Pathology and Molecular Medicine, Faculty of Medicine, University of Otago, Ōtākou Whakaihu Waka, PO Box 56, Hercus Building, Cnr Great King & Hanover Streets, Otago, 9054, Dunedin, New Zealand.
Gregory GimenezDepartment of Pathology and Molecular Medicine, Faculty of Medicine, University of Otago, Ōtākou Whakaihu Waka, PO Box 56, Hercus Building, Cnr Great King & Hanover Streets, Otago, 9054, Dunedin, New Zealand.
Aniruddha ChatterjeeDepartment of Pathology and Molecular Medicine, Faculty of Medicine, University of Otago, Ōtākou Whakaihu Waka, PO Box 56, Hercus Building, Cnr Great King & Hanover Streets, Otago, 9054, Dunedin, New Zealand. aniruddha.chatterjee@otago.ac.nz.ORCID https://orcid.org/0000-0001-7276-2248

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCirculating tumour cells (CTCs) are key mediators of metastasis and exhibit marked phenotypic plasticity driven by epithelial-to-mesenchymal transition (EMT). Traditional marker-based CTC isolation approaches rely on epithelial marker expression, which may fail to capture mesenchymal and hybrid CTC subpopulations. Hybrid CTCs remain poorly characterised in colorectal cancer (CRC). This study explored transcriptionally defined CTC subpopulations in CRC to provide insight into CTC heterogeneity.

methodsSingle-cell RNA sequencing (scRNA-seq) was performed on peripheral blood mononuclear cell (PBMC) fractions from four treatment-naive CRC patients (AJCC stages I-IV). Integrated analysis with healthy PBMC controls enabled immune cell exclusion and cell-type annotation. CTCs were identified using epithelial and mesenchymal transcriptional scores together with CD45 negativity. Differential expression, pathway enrichment, and pseudotime analyses were used to characterise epithelial, mesenchymal, and hybrid CTC states.

resultsSubpopulations of epithelial, mesenchymal, and hybrid cells were identified in one CRC patient. Hybrid CTCs exhibited distinct transcriptional features and enrichment of pathways related to RNA metabolism, protein trafficking, mitochondrial energy production, DNA repair, and cytoskeletal organisation. Trajectory inference suggested a continuous EMT spectrum, with hybrid CTCs occupying intermediate pseudotime states characterised by progressive loss of epithelial markers and acquisition of mesenchymal-associated features.

conclusionThis study explored CTC heterogeneity in CRC using single-cell transcriptomics and identified epithelial, hybrid, and mesenchymal CTC states within the analysed sample. Hybrid CTCs exhibited distinct transcriptional features, providing preliminary insight into the transcriptional diversity of CRC CTCs. Further studies in larger cohorts are required to validate these findings and determine their clinical relevance.

Indexed as

Colorectal NeoplasmsNeoplastic Cells, CirculatingBiomarkers, TumorEpithelial-Mesenchymal TransitionFemaleGene Expression ProfilingGene Expression Regulation, NeoplasticHumansLeukocytes, MononuclearMaleSequence Analysis, RNASingle-Cell AnalysisSingle-Cell Gene Expression AnalysisBiomarkers, TumorColorectal CancerEpithelial to mesenchymal transitionHybrid Circulating tumour cellsingle-cell RNA sequencing

Identifiers

PMID42479224
PMCPMC13388743

What Socratic holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.