Cell Replication and Angiogenesis in Central Nervous System Tumors and Their Relationship with the Expression of Tissue Prolactin and Hyperprolactinemia
| Autor: | Lígia Maria Barbosa-Coutinho, Miriam da Costa Oliveira, Júlia Fernanda Semmelmann Pereira-Lima, Nelson Pires Ferreira, Rosalva Thereza Meurer, Carolina Garcia Soares Leães, Denise D Abech |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Open Journal of Pathology. :50-57 |
| ISSN: | 2164-6783 2164-6775 |
| Popis: | This study aimed to assess the effect of intracellular prolactin (ICPRL) and hyperprolactinemia on cell replication, using an immunohistochemical (IHC) technique for Ki-67 and Mcm-2, and angiogenesis, using IHC for endoglin CD-105, in central nervous system (CNS) tumors. This cross-sectional study included 79 cases of surgically excised primary CNS tumors of neuroepithelial origin (41.8% of all cases: 10.2% astrocytomas, 24% glioblastomas and 7.6% oligodendrogliomas) and meningeal origin (58.2% of all cases). Ki-67 and Mcm-2 indexes were calculated as a percentage of marked cells. The medians for Ki-67 and Mcm-2 indexes were significantly lower in meningiomas than in glioblastomas (p S = 0.60) replication markers. There were no significant differences in vascular density between the different histological types. Immunohistochemistry for ICPRL was positive in 45.6% of the tumors. Serum prolactin (PRL) was elevated in 30.6% of the cases. Multiple regression analysis revealed no important correlation of ICPRL and serum PRL on Ki-67 and Mcm-2 indexes or vascular density. The analysis of the combined impact of ICPRL and serum PRL variables revealed a trend towards an increase in microvessel density in tumor tissue and a significant increase in cell replication markers (p = 0.009 for Ki-67 and p = 0.05 for Mcm-2). PRL in tumor tissue may be one of the modulating factors of cell proliferation in the CNS. |
| Databáze: | OpenAIRE |
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