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Maspin expression in normal skin and usual cutaneous carcinomas
Jorge S Reis-Filho1, Beatriz Torio, André Albergaria
1School of Health Sciences, University of Minho, Braga, Portugal. jreis@ipatimup.pt
Virchows Archiv : an International Journal of Pathology
|December 4, 2002
Summary
Maspin, a serine protease inhibitor, is expressed in normal skin and various skin cancers. Its expression correlates with differentiation in squamous cell carcinomas but not other clinical features, challenging its tumor suppressor role.
Area of Science:
- Dermatology
- Oncology
- Molecular Biology
Background:
- Maspin, a serine protease inhibitor, is implicated as a tumor suppressor and angiogenesis inhibitor.
- Maspin expression in nuclear compartments and association with cell differentiation are noted.
- No prior systematic studies on maspin in normal skin and common skin carcinomas exist.
Purpose of the Study:
- To investigate maspin expression patterns in normal skin and skin carcinomas.
- To correlate maspin expression with histological features and clinical parameters.
Main Methods:
- Semiquantitative analysis of maspin distribution and immunoreactivity.
- Examination of maspin in 14 squamous cell carcinomas (SCCs) and 16 basal cell carcinomas (BCCs).
- Correlation with histological type, grade, vascular invasion, perineural infiltration, and mitotic count.
Main Results:
- Maspin detected in normal epidermis, hair follicles, sebaceous glands, and sweat glands.
- Maspin expression correlated with differentiation in SCCs; variable in BCCs.
- Nuclear maspin expression observed in a small subset of cases; no correlation with other clinical pathological features.
Conclusions:
- Maspin expression is associated with differentiation in specific skin cell lineages.
- Findings do not support maspin's role as a tumor suppressor gene in these skin neoplasms.
- Further research is needed to elucidate maspin's precise function in skin biology and cancer.