Pituitary adenomas: MCM2 protein as a cell proliferation marker
Tumors of the Central Nervous System: Pineal, Pituitary, and Spinal Tumors, Vol: 10, Page: 125-131
2013
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Book Chapter Description
Pituitary adenomas occasionally show aggressive behavior with rapid growth and invasion of the surrounding tissues. The identi fi cation of biological markers able to recognize aggressive pituitary adenomas in early stages remains a challenge. We aimed to determine the expression of a new cell proliferation marker with clinical signi fi cance in several human neoplasms, Mcm2, in pitui tary adenomas and to establish the relationship of the Mcm2 index with tumor extension and invasion. The proliferative index was determined in tumor specimens of 64 patients with acromegaly or clinically nonfunctioning pituitary adenoma using immunohistochemical methods for two antigens, Mcm2 and Ki-67. Fifty-four (86%) adenomas showed immunoreactivity to Mcm2. The median Mcm2 index was 0.91% (range 0-13.24%). Immunoreactivity to Ki-67 was observed in 61 adenomas (95%). The median Ki-67 index was 0.88% (range 0-7.39%). A signi fi cant positive correlation was found between log Mcm2 index and log Ki-67 index (p < 0.001). Mcm2 and Ki-67 detected a similar number of proliferating cells. Mcm2 index showed a signi fi cant association with tumor extension (p = 0.02), but not with tumor invasion and hormone phenotype. In conclusion, we demonstrated that Mcm2 was similar to Ki-67 in the identi fi cation of the proliferating cells in this sample.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85031407212&origin=inward; http://dx.doi.org/10.1007/978-94-007-5681-6_14; http://link.springer.com/10.1007/978-94-007-5681-6_14; https://dx.doi.org/10.1007/978-94-007-5681-6_14; https://link.springer.com/chapter/10.1007/978-94-007-5681-6_14
Springer Science and Business Media LLC
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