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Isolation of Cancer Stem Cells From Human Prostate Cancer Samples
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SLPI in Prostate Cancer.

Dario Rosini1,2, Irene Cosi1, Pierpaolo De Iaco1,2

  • 1Laboratory of Cancer Genetics, Core Research Laboratory, Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO), 50139 Florence, Italy.

Cancers
|February 13, 2026
PubMed
Summary
This summary is machine-generated.

Secretory Leukocyte Protease Inhibitor (SLPI) has diverse roles in cancer. In prostate cancer, elevated SLPI indicates advanced disease and poorer survival, highlighting its complex role.

Keywords:
ETS transcription factorsETV1ETV4SLPIandrogenandrogen receptorbiomarkerprostate cancersecretory leukocyte protease inhibitortransgenic mouse model

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Oncology

Background:

  • Secretory Leukocyte Protease Inhibitor (SLPI) is a key protein with anti-protease, anti-microbial, and anti-inflammatory functions.
  • SLPI influences tissue homeostasis, extracellular matrix remodeling, and the tumor microenvironment.
  • Its role in cancer is complex and context-dependent, varying across different malignancies.

Purpose of the Study:

  • To review the multifaceted functions of SLPI in cancer.
  • To focus on the molecular mechanisms and clinical significance of SLPI in prostate carcinoma.

Main Methods:

  • Literature review of existing research on SLPI in cancer.
  • Analysis of SLPI expression patterns and clinical correlations in various cancers, with a focus on prostate cancer.

Main Results:

  • SLPI is overexpressed in many cancers (colorectal, gastric, pancreatic, breast), correlating with advanced disease.
  • Reduced SLPI levels are seen in head and neck squamous cell carcinoma and hepatocellular carcinoma, potentially indicating a favorable prognosis.
  • In prostate cancer, SLPI is downregulated in early stages but upregulated in advanced, castration-resistant disease, correlating with reduced PSA progression-free survival.

Conclusions:

  • SLPI's function in cancer is tissue-specific and depends on the disease state.
  • Elevated SLPI in advanced prostate cancer suggests a significant role in disease progression and therapeutic resistance.
  • Further research into SLPI's mechanisms in prostate cancer is warranted for clinical applications.