Summary The family of the poly(adenosine diphosphate-ribose) polymerase (PARP) proteins is directly involved in genomic stability, DNA repair, and apoptosis by DNA damage. In this study, we evaluated the role of PARP-1 in melanoma and its prognostic importance. We studied by immunohistochemistry and Western blot analysis PARP-1 expression in a selected series of 80 primary melanoma of the head and neck region. The results were correlated with tumor thickness and patient’s outcome. A follow-up of at least 3 years was available. Fifteen cases of benign melanocytic nevi were used as controls. Normal melanocytes showed only scattered, focal nuclear positivity and were considered as negative for PARP-1 expression by immunohistochemistry (score, 0). Thirty cases of melanoma (37.5%) showed nuclear expression of PARP-1 in both radial and vertical growth phases. Western blot analysis showed the presence of a high signal for full-length PARP-1 only in the cases with high immunohistochemical (nuclear) expression of protein (score, ++/+++) in both radial and vertical growth phase. A significant correlation was present between PARP-1 expression in vertical growth phase and the thickness of tumor lesion ( P = .014); all but one tumor measuring less than 0.75 mm showed no or low PARP-1 expression. No correlation was found between PARP-1 expression in radial growth phase and tumor thickness ( P = .38, data not shown). These data suggest that PARP-1 overexpression is a potential novel molecular marker of aggressive cutaneous malignant melanoma and a direct correlation between PARP-1–mediated inhibition of the apoptosis and biologic behavior of cutaneous malignant melanoma.

Poly(adenosine diphosphate-ribose) polymerase 1 expression in malignant melanomas from photoexposed areas of the head and neck region / Staibano, Stefania; Pepe, S; Lo Muzio, L; Somma, P; Mascolo, Massimo; Argenziano, G; Scalvenzi, Massimiliano; Salvatore, G; Fabbrocini, Gabriella; Molea, Guido; Bianco, Ar; Carlomagno, Chiara; DE ROSA, Gaetano. - In: HUMAN PATHOLOGY. - ISSN 0046-8177. - STAMPA. - 36:7(2005), pp. 724-731. [10.1016/j.humpath.2005.04.017]

Poly(adenosine diphosphate-ribose) polymerase 1 expression in malignant melanomas from photoexposed areas of the head and neck region.

STAIBANO, STEFANIA;MASCOLO, MASSIMO;SCALVENZI, MASSIMILIANO;FABBROCINI, GABRIELLA;MOLEA, GUIDO;CARLOMAGNO, Chiara;DE ROSA, GAETANO
2005

Abstract

Summary The family of the poly(adenosine diphosphate-ribose) polymerase (PARP) proteins is directly involved in genomic stability, DNA repair, and apoptosis by DNA damage. In this study, we evaluated the role of PARP-1 in melanoma and its prognostic importance. We studied by immunohistochemistry and Western blot analysis PARP-1 expression in a selected series of 80 primary melanoma of the head and neck region. The results were correlated with tumor thickness and patient’s outcome. A follow-up of at least 3 years was available. Fifteen cases of benign melanocytic nevi were used as controls. Normal melanocytes showed only scattered, focal nuclear positivity and were considered as negative for PARP-1 expression by immunohistochemistry (score, 0). Thirty cases of melanoma (37.5%) showed nuclear expression of PARP-1 in both radial and vertical growth phases. Western blot analysis showed the presence of a high signal for full-length PARP-1 only in the cases with high immunohistochemical (nuclear) expression of protein (score, ++/+++) in both radial and vertical growth phase. A significant correlation was present between PARP-1 expression in vertical growth phase and the thickness of tumor lesion ( P = .014); all but one tumor measuring less than 0.75 mm showed no or low PARP-1 expression. No correlation was found between PARP-1 expression in radial growth phase and tumor thickness ( P = .38, data not shown). These data suggest that PARP-1 overexpression is a potential novel molecular marker of aggressive cutaneous malignant melanoma and a direct correlation between PARP-1–mediated inhibition of the apoptosis and biologic behavior of cutaneous malignant melanoma.
2005
Poly(adenosine diphosphate-ribose) polymerase 1 expression in malignant melanomas from photoexposed areas of the head and neck region / Staibano, Stefania; Pepe, S; Lo Muzio, L; Somma, P; Mascolo, Massimo; Argenziano, G; Scalvenzi, Massimiliano; Salvatore, G; Fabbrocini, Gabriella; Molea, Guido; Bianco, Ar; Carlomagno, Chiara; DE ROSA, Gaetano. - In: HUMAN PATHOLOGY. - ISSN 0046-8177. - STAMPA. - 36:7(2005), pp. 724-731. [10.1016/j.humpath.2005.04.017]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/416437
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