The cell-surface serine protease prostasin is lost during cervical squamous cell carcinogenesis

Area of Science:

• Biochemistry
• Oncology
• Cell Biology

Background:

• Glycosylphosphatidylinositol (GPI)-anchored serine protease prostasin exhibits context-dependent roles in cancer.
• Prostasin can promote tumors in some cancers while suppressing them in others.
• Understanding prostasin's role in specific cancer types is crucial due to its opposing functions.

Purpose of the Study:

• To investigate prostasin expression in normal cervix and cervical squamous cell carcinoma (CSCC).
• To characterize prostasin's localization and expression patterns during cervical carcinogenesis.

Main Methods:

• Immunohistochemical analysis of prostasin protein expression.
• Utilized tissue arrays of human cervical carcinomas and corresponding normal tissues.
• Compared prostasin localization with pan-keratin and E-cadherin expression.

Main Results:

• Prostasin protein is expressed on the cell surface of suprabasal squamous cells in healthy murine and human cervix.
• Prostasin expression is maintained in well-differentiated cellular strata.
• Prostasin expression is lost during epithelial cell dedifferentiation, a characteristic of high-grade CSCC.

Conclusions:

• Prostasin protein expression is differentially regulated during cervical carcinogenesis.
• The observed expression profile suggests prostasin's involvement in normal epithelial biology.
• Prostasin's loss in high-grade CSCC provides potential clues to its function in carcinogenesis.