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Expression of Intermediate Filaments in the Developing Testis and Testicular Germ Cell Cancer
Maria E Camacho-Moll1, Leendert H J Looijenga2, Roland Donat3
1Department of Molecular Biology, Northeast Centre for Biomedical Research, Mexican Institute for Social Security, 2 de abril 501, Esq. San Luis Potosi, Col. Independencia, Monterrey C.P. 64720, Nuevo León, Mexico.
Cancers
|November 26, 2022
Summary
Desmin expression in Sertoli cells does not change with testicular germ cell cancer (TGCC) progression. Cytokeratin, however, indicates impaired Sertoli cell maturation in TGCC development.
Area of Science:
- Reproductive biology
- Oncology
- Cell biology
Background:
- Sertoli cell maturity is crucial for testicular function and is linked to testicular germ cell cancer (TGCC).
- Cytokeratin and desmin are intermediate filaments whose expression patterns may offer insights into Sertoli cell status.
- Understanding these markers' roles is vital for diagnosing and potentially treating TGCC.
Purpose of the Study:
- To investigate the expression of cytokeratin and desmin in normal human testis development.
- To analyze the expression of these proteins in pre-invasive germ cell neoplasia in-situ (GCNIS) and invasive TGCC.
- To determine the association of desmin and cytokeratin with Sertoli cell maturation and TGCC progression.
Main Methods:
- Immunohistochemistry and immunofluorescence techniques were employed.
- Human fetal, adult testis, GCNIS, and TGCC tissue samples were analyzed.
- Expression levels of cytokeratin and desmin were quantified and compared across different developmental and pathological stages.
Main Results:
- Desmin was present in fetal Sertoli cells, decreasing significantly by the second trimester, and remained expressed in adult and TGCC samples.
- Cytokeratin was found in fetal Sertoli cells but absent in adult Sertoli cells without pathology.
- In TGCC patients, cytokeratin was detected in Sertoli cells adjacent to GCNIS or invasive cancer cells, but not in tubules with active spermatogenesis.
Conclusions:
- Desmin expression is not a reliable indicator of Sertoli cell maturation or TGCC progression.
- Cytokeratin expression in adult Sertoli cells appears to be a marker for impaired maturation, potentially preceding TGCC development.
- These findings highlight cytokeratin's potential role in identifying early stages of testicular cancer development.
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