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Tumor Progression

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Updated: Sep 13, 2025

Orthotopic Transplantation of Syngeneic Lung Adenocarcinoma Cells to Study PD-L1 Expression

Orthotopic Transplantation of Syngeneic Lung Adenocarcinoma Cells to Study PD-L1 Expression

Published on: January 19, 2019

Single-Cell Transcriptomic Analysis Unveils Key Regulators and Signaling Pathways in Lung Adenocarcinoma Progression.

Jialu Ma^1,2, Caleb McQuay³, John Talburt²

¹MidSouth Bioinformatics Center and Joint Bioinformatics Graduate Program, University of Arkansas at Little Rock, Little Rock, AR 72204, USA.

|July 29, 2025

Summary

This summary is machine-generated.

Single-cell sequencing reveals distinct epithelial cell changes in late-stage lung adenocarcinoma (LUAD). These findings identify new markers and communication pathways in the tumor microenvironment for improved LUAD treatment.

Keywords:

lung adenocarcinoma progression signaling pathways single-cell RNA sequencing transcription regulator

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Last Updated: Sep 13, 2025

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Next Generation Sequencing for the Detection of Actionable Mutations in Solid and Liquid Tumors

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Published on: September 20, 2016

Area of Science:

Oncology
Genomics
Bioinformatics

Background:

Lung adenocarcinoma (LUAD) is a major cause of cancer mortality, requiring novel therapeutic strategies.
Single-cell RNA sequencing (scRNA-seq) offers unprecedented resolution for understanding cancer's cellular heterogeneity.
LUAD's complexity is often masked by traditional bulk transcriptomic analyses.

Purpose of the Study:

To investigate cell-type-specific transcriptomic alterations during LUAD progression using scRNA-seq.
To identify stage-specific gene markers and their regulatory networks.
To analyze intercellular communication dynamics within the tumor microenvironment (TME) across LUAD stages.

Main Methods:

Integrative analysis of scRNA-seq data from multiple LUAD patient cohorts.
Clustering, lineage trajectory, and transcriptional regulatory network reconstruction.
Construction of intercellular communication networks to map TME signaling.

Main Results:

Epithelial cells show distinct transcriptional profiles in stage IV LUAD, unlike immune or stromal cells.
A panel of stage-specific epithelial gene markers was identified, correlating with survival and TME composition.
Key transcription factors (ATF3, ATF4, HSF1, KLF4, NFIC) were implicated as upstream regulators.
Late-stage LUAD exhibits increased epithelial-derived signaling and decreased immune-derived signals.
Wnt, PTN, and PDGF pathways were identified as crucial in LUAD progression through cell-cell communication.

Conclusions:

This study presents a single-cell map of LUAD progression, emphasizing epithelial cell regulation and TME communication.
Novel molecular markers and regulatory mechanisms with prognostic and therapeutic potential were uncovered.
Findings pave the way for more precise LUAD treatments by targeting identified pathways and regulators.