RGD Reference Report - Intercellular adhesion molecule 1 (ICAM-1) and bcl-2 are differentially expressed in early evolving malignant melanoma. - Rat Genome Database

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Intercellular adhesion molecule 1 (ICAM-1) and bcl-2 are differentially expressed in early evolving malignant melanoma.

Authors: Collins, KA  White, WL 
Citation: Collins KA and White WL, Am J Dermatopathol. 1995 Oct;17(5):429-38.
RGD ID: 8547584
Pubmed: PMID:8599446   (View Abstract at PubMed)

The expression of intercellular adhesion molecule 1 (ICAM-1), a molecule pivotal in many inflammatory and immune paracrine interactions, has been highly correlated with malignant melanoma (MM) progression. Because numerous parallels exist between tissues of neural crest origin and the immune system in the regulation of postmitotic cell survival, ICAM-1 expression was studied in MM and compared with that of B-cell lymphoma/leukemia 2 protein (bcl-2 oncoprotein), an important regulator in prolonging lymphoid cell survival by blocking programmed cell death. Frozen sections from 33 cases were studied by immunoperoxidase techniques: 14 primary MM (five in situ), nine metastatic MM (one epidermotropic), four melanocytic nevi, and six normal skin controls. The percentages of the cells that stained and their intensities (0-4+) were graded. Both ICAM-1 (90%, 3-4+) and bcl-2 (95%, 2-4+) were strongly expressed in all nine metastases, including the epidermotropic disease extension. Bcl-2 strongly decorated the tumor cells in all 14 cases of primary MM (80%, 2-4+); in the five in situ MM, bcl-2 stained the atypical melanocytes at the dermal-epidermal junction (DEJ) and throughout the epidermis (75%, 1-2+). In contrast, ICAM-1 was negative in the in situ MM. ICAM-1 expression became strong (85%, 2-4+) in the dermal component of early invasive disease. Both ICAM-1 and bcl-2 were expressed in melanocytic nevi, decreasing in intensity deep within the dermis as the nevus cells senesced ("matured"). Only bcl-2 was expressed in the normal melanocytes of the six skin controls. These data show that bcl-2 is constitutively expressed in normal melanocytes and melanocytic nevi and persists in the transformed cells of early and late MM. ICAM-1 is expressed only after dermal involvement occurs, both in melanocytic nevi and in invasive MM; it persists in metastatic disease. The coexpression of bcl-2 and ICAM-1 demonstrates another similarity between the immune and neural crest systems, but it does not define or necessarily imply any functional interaction between the two proteins. The intercellular relationship of these two molecules, if any, remains to be investigated.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
melanoma disease_progressionIEP 8547584 RGD 
melanoma disease_progressionISOICAM1 (Homo sapiens)8547584; 8547584 RGD 

Objects Annotated

Genes (Rattus norvegicus)
Icam1  (intercellular adhesion molecule 1)

Genes (Mus musculus)
Icam1  (intercellular adhesion molecule 1)

Genes (Homo sapiens)
ICAM1  (intercellular adhesion molecule 1)


Additional Information