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Comparative analysis of CEACAM1 expression in thin melanomas with and without regression
Luciana Nichita1,2, Sabina Zurac1,2, Alexandra Bastian1,2
1Department of Pathology, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, 010221 Bucharest, Romania.
Oncology Letters
|April 5, 2019
Summary
Carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) expression is linked to melanoma invasiveness. CEACAM1 is overexpressed in aggressive melanomas and lost during tumor regression, suggesting a role in immune evasion.
Area of Science:
- Oncology
- Immunology
- Cell Biology
Background:
- Carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) is implicated in cell signaling and melanoma progression.
- CEACAM1 expression is associated with increased melanoma cell invasion and migration.
- Tumor regression is a model for understanding anti-tumor immunity.
Purpose of the Study:
- To investigate CEACAM1 expression in regressing versus non-regressing thin melanomas.
- To correlate CEACAM1 expression with melanoma invasiveness and regression.
- To understand CEACAM1's role in melanoma immune evasion.
Main Methods:
- Retrospective study of 53 thin melanoma cases (21 with regression, 32 without).
- Comparative analysis of CEACAM1 expression in regressed, non-regressed areas, and non-regressed melanomas.
- Utilized three different CEACAM1 antibody clones for consistent reactivity.
Main Results:
- CEACAM1 membrane positivity was observed in tumor cells of non-regressed melanomas and non-regressed areas.
- Regressed areas showed predominantly negative CEACAM1 expression in tumor cells.
- Stronger CEACAM1 positivity was noted at the invasive front of non-regressed lesions.
Conclusions:
- CEACAM1 overexpression in thin melanomas correlates with invasiveness and suggests a more aggressive phenotype.
- Loss of CEACAM1 expression in regressed areas may be linked to the presence of natural killer cells and immune response.
- CEACAM1 plays a role in melanoma progression and potentially in immune evasion during regression.
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