PMID- 22507324 OWN - NLM STAT- MEDLINE DCOM- 20120531 LR - 20170214 IS - 0394-6320 (Print) IS - 0394-6320 (Linking) VI - 25 IP - 1 DP - 2012 Jan-Mar TI - Neurotrophins, their receptors and KI-67 in human GH-secreting pituitary adenomas: an immunohistochemical analysis. PG - 117-25 AB - Pituitary adenomas are a diverse group of tumors arising from the pituitary gland. Typically, they are small, slow-growing, hormonally inactive lesions that come to light as incidental findings on radiologic or postmortem examinations, although some small, slow-growing lesions with excessive hormonal activity may manifest with a clinical syndrome. The family of neurotrophins plays a key role in the development and maintenance of the pituitary endocrine cell function and in the regulation of hypothalamo-pituitary-adrenocortical axis activity. The objective of our experimental study is to investigate the localization of the neurotrophins, their relative receptors and to detect the expression level of Ki-67 to determine whether all these factors participate in the transformation and development of human pituitary adenomas. A very strong expression of Neurotrophin-3 (NT-3) and its receptor TrKC was observed in the extracellular matrix (ECM) and vessel endothelium, together with a clear/marked presence of Brain-derived neurotrophic factor (BDNF), and its receptor TrKB, thus confirming their direct involvement in the progression of pituitary adenomas. On the contrary, NGF (Nerve growth factor) and its receptor TrKA and p75NTR were weakly expressed in the epithelial gland cells and the ECM. FAU - Artico, M AU - Artico M AD - Department of Sensory Organs, Sapienza University of Rome, Rome, Italy. marco.artico@uniroma1.it FAU - Bianchi, E AU - Bianchi E FAU - Magliulo, G AU - Magliulo G FAU - De Vincentiis, M AU - De Vincentiis M FAU - De Santis, E AU - De Santis E FAU - Orlandi, A AU - Orlandi A FAU - Santoro, A AU - Santoro A FAU - Pastore, F S AU - Pastore FS FAU - Giangaspero, F AU - Giangaspero F FAU - Caruso, R AU - Caruso R FAU - Re, M AU - Re M FAU - Fumagalli, L AU - Fumagalli L LA - eng PT - Journal Article PL - England TA - Int J Immunopathol Pharmacol JT - International journal of immunopathology and pharmacology JID - 8911335 RN - 0 (Ki-67 Antigen) RN - 0 (NGFR protein, human) RN - 0 (Nerve Growth Factors) RN - 0 (Nerve Tissue Proteins) RN - 0 (Receptors, Nerve Growth Factor) RN - EC 2.7.10.1 (Receptor, trkA) RN - EC 2.7.10.1 (Receptor, trkB) RN - EC 2.7.10.1 (Receptor, trkC) SB - IM MH - Adenoma/*chemistry MH - Extracellular Matrix/chemistry MH - Growth Hormone-Secreting Pituitary Adenoma/*chemistry MH - Humans MH - Immunohistochemistry MH - Ki-67 Antigen/*analysis MH - Nerve Growth Factors/*analysis MH - Nerve Tissue Proteins/analysis MH - Receptor, trkA/analysis MH - Receptor, trkB/analysis MH - Receptor, trkC/analysis MH - Receptors, Nerve Growth Factor/analysis EDAT- 2012/04/18 06:00 MHDA- 2012/06/01 06:00 CRDT- 2012/04/18 06:00 PHST- 2012/04/18 06:00 [entrez] PHST- 2012/04/18 06:00 [pubmed] PHST- 2012/06/01 06:00 [medline] AID - 14 [pii] AID - 10.1177/039463201202500114 [doi] PST - ppublish SO - Int J Immunopathol Pharmacol. 2012 Jan-Mar;25(1):117-25. doi: 10.1177/039463201202500114.