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Rubinfeld H, Kammer A, Cohen O, Gorshtein A, Cohen ZR, Hadani M, Werner H, Shimon I. IGF1 induces cell proliferation in human pituitary tumors - functional blockade of IGF1 receptor as a novel therapeutic approach in non-functioning tumors. Mol Cell Endocrinol 2014; 390:93-101. [PMID: 24769281 DOI: 10.1016/j.mce.2014.04.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 03/20/2014] [Accepted: 04/13/2014] [Indexed: 01/08/2023]
Abstract
Insulin-like growth factor (IGF1) and its receptor display potent proliferative and antiapoptotic activities and are considered key players in malignancy. The objective of the study was to explore the role of IGF1 and its downstream pathways in the proliferation of non-functioning pituitary tumor cells and to develop a targeted therapeutic approach for the treatment of these tumors. Cultures of human non-functioning pituitary adenomas and the non-secreting immortalized rat pituitary tumor cell line MtT/E were incubated with IGF1, IGF1 receptor inhibitor or both, and cell viability, proliferation and signaling were examined. Our results show that IGF1 elevated cell proliferation and enhanced cell cycle progression as well as the expression of cyclins D1 and D3. IGF1 also induced the phosphorylation of ERK, Akt and p70S6K. On the other hand, the selective IGF1R inhibitor NVP-AEW541 abrogated IGF1-induced cell proliferation as well as IGF1 receptor phosphorylation and downstream signaling.
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Affiliation(s)
- Hadara Rubinfeld
- Institute of Endocrinology and Felsenstein Medical Research Center, Rabin Medical Center, Petach Tikva 49100, Israel; Sackler School of Medicine, Tel-Aviv University, Tel Aviv 69978, Israel.
| | - Adi Kammer
- Institute of Endocrinology and Felsenstein Medical Research Center, Rabin Medical Center, Petach Tikva 49100, Israel; Sackler School of Medicine, Tel-Aviv University, Tel Aviv 69978, Israel
| | - Ortal Cohen
- Institute of Endocrinology and Felsenstein Medical Research Center, Rabin Medical Center, Petach Tikva 49100, Israel; Sackler School of Medicine, Tel-Aviv University, Tel Aviv 69978, Israel
| | - Alexander Gorshtein
- Institute of Endocrinology and Felsenstein Medical Research Center, Rabin Medical Center, Petach Tikva 49100, Israel; Sackler School of Medicine, Tel-Aviv University, Tel Aviv 69978, Israel
| | - Zvi R Cohen
- Sackler School of Medicine, Tel-Aviv University, Tel Aviv 69978, Israel; Department of Neurosurgery, Sheba Medical Center, Tel-Hashomer, Israel
| | - Moshe Hadani
- Sackler School of Medicine, Tel-Aviv University, Tel Aviv 69978, Israel; Department of Neurosurgery, Sheba Medical Center, Tel-Hashomer, Israel
| | - Haim Werner
- Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Israel
| | - Ilan Shimon
- Institute of Endocrinology and Felsenstein Medical Research Center, Rabin Medical Center, Petach Tikva 49100, Israel; Sackler School of Medicine, Tel-Aviv University, Tel Aviv 69978, Israel
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Hofmann BM, Hoelsken A, Fahlbusch R, Blümcke I, Buslei R. Hormone Receptor Expression in Craniopharyngiomas. Neurosurgery 2010; 67:617-25; discussion 625. [DOI: 10.1227/01.neu.0000372918.68453.5b] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Bernd M. Hofmann
- Department of Neurosurgery, University of Erlangen–Nuremberg, Erlangen, Germany
- Current address: Siemens AG, Healthcare Sector, Erlangen, Germany
| | - Annett Hoelsken
- Department of Neuropathology, University of Erlangen–Nuremberg, Erlangen, Germany
| | - Rudolf Fahlbusch
- Department of Neurosurgery, University of Erlangen–Nuremberg, Erlangen, Germany
- Current address: Department of Neurosurgery, International Neuroscience Institute, Hannover, Germany
| | - Ingmar Blümcke
- Department of Neuropathology, University of Erlangen–Nuremberg, Erlangen, Germany
| | - Rolf Buslei
- Department of Neuropathology, University of Erlangen–Nuremberg, Erlangen, Germany
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