Minichromosome maintenance protein 7 as prognostic marker of tumor aggressiveness in pituitary adenoma patients.

Antonella Coli, Sabrina Chiloiro, Liverana Lauretti, Guido Fadda, Laura De Marinis Grasso, Libero Lauriola, Sylvia L. Asa, Laura De Marinis

Risultato della ricerca: Contributo in rivistaArticolo in rivista

15 Citazioni (Scopus)


BACKGROUND: Ki-67 labeling index (LI) is currently regarded as a useful prognostic marker of pituitary adenoma (PA) clinical behavior, although its relevance as a reliable clinical indicator is far from being universally accepted, since both validations and criticisms are found in the literature. Minichromosome maintenance 7 (MCM7), a cell-cycle regulator protein, has been recently proposed as a marker of tumor aggressiveness in tumors from many sites, including the CNS. Therefore, we evaluated MCM7, in comparison to Ki-67, as a potential marker of clinical outcome in PA. DESIGN AND METHODS: In this single-institution retrospective study, 97 patients with PA (23 ACTH, 12 GH, 29 PRL, 10 FSH/LH, and 23 non-secreting adenomas) were recruited and the prognostic value of both MCM7 and Ki-67 was evaluated by immunohistochemical techniques. In addition, p53 nuclear expression and mitotic index were also evaluated. RESULTS: Twenty-six of the 97 PA patients recurred during the follow-up period. Cox's regression analysis showed that high nuclear expression of MCM7 LI, unlike Ki-67 LI, was directly associated with a higher (7.7-fold) risk of recurrence/progression. Kaplan-Meier analysis of recurrence/progression-free survival curves revealed that patients with high MCM7 LI (≥15%) had a shorter recurrence/progression-free survival than those with low MCM7 LI (<15%). Moreover, among patients with invasive tumors, high MCM7 LI identified those with the highest risk of recurrence/progression. CONCLUSIONS: Data from this study suggest that MCM7 is a prognostic marker of clinical outcome in PA patients, more reliable and informative than Ki-67.
Lingua originaleEnglish
pagine (da-a)307-314
Numero di pagine8
RivistaEuropean Journal of Endocrinology
Stato di pubblicazionePubblicato - 2016


  • pituitary adenoma


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