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

Abstract：

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.

journal_name

Eur J Endocrinol

journal_title

European journal of endocrinology

authors

Coli A,Asa SL,Fadda G,Scannone D,Chiloiro S,De Marinis L,Lauretti L,Ranelletti FO,Lauriola L

doi

10.1530/EJE-15-0586

subject

Has Abstract

pub_date

2016-03-01 00:00:00

pages

307-14

issue

3

eissn

0804-4643

issn

1479-683X

pii

EJE-15-0586

journal_volume

174

pub_type

杂志文章

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