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There are several types of targeted therapies against...
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Utilizing Functional Genomics Screening to Identify Potentially Novel Drug Targets in Cancer Cell Spheroid Cultures
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Pan-Cancer Analysis and Functional Characterization Identify SLC15A4 as a Novel Prognostic Biomarker and Therapeutic

Xiaodan Lyu1, Ziming Lin1, Ya Lin2

  • 1Department of Pharmacy, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.

Asia-Pacific Journal of Clinical Oncology
|April 6, 2026
PubMed
Summary

High SLC15A4 transporter protein levels indicate poor survival in cancers like breast cancer (BRCA) and lower-grade glioma (LGG). This protein impacts immune cells and drug sensitivity, offering a potential therapeutic target.

Keywords:
SLC15A4immune infiltrationmolecular dockingpan‐cancer analysisprognostic biomarker

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Area of Science:

  • Oncology
  • Immunology
  • Molecular Biology

Background:

  • Solute carrier family 15 member 4 (SLC15A4) is implicated in immune regulation.
  • Its specific role in cancer development and progression remains largely uncharacterized.

Purpose of the Study:

  • To comprehensively analyze SLC15A4 expression, prognostic value, and functional associations across various cancers.
  • To investigate SLC15A4's role in the tumor immune microenvironment and its potential as a therapeutic target, particularly in breast cancer (BRCA) and lower-grade glioma (LGG).

Main Methods:

  • Utilized large-scale public cancer genomic and transcriptomic data.
  • Performed in vitro experiments using BRCA cell lines.
  • Conducted in silico drug screening to identify potential SLC15A4 inhibitors.

Main Results:

  • Elevated SLC15A4 expression correlates with unfavorable patient survival across multiple cancer types.
  • SLC15A4 levels are associated with immune cell infiltration and drug sensitivity.
  • Distinct SLC15A4 expression patterns were observed in different BRCA cell lines, and potential inhibitory drugs were identified.

Conclusions:

  • SLC15A4 serves as a significant prognostic biomarker in BRCA and LGG.
  • Targeting SLC15A4 presents a promising therapeutic strategy for these cancers, potentially modulating the immune microenvironment.