Abstract library

82 results for "MEK inhibitors".
#815 The Effect of Autophagy Inhibitors Alone or in Combination with mTOR Inhibitors in a Neuroendocrine Tumor Cell Model
Introduction: Most patients with neuroendocrine tumors (NETs) require systemic treatment, often with a limited therapeutic effect. RAD001 and Torin1 are mTOR inhibitors (mTORi) known to suppress cell proliferation in NETs. However, cancer cells may use mTORi-induced autophagy to escape the anti-proliferative effect and to prolong cell survival. Chloroquine (CQ) and hydroxychloroquine (HCQ) inhibit autophagy.
Conference: 11th Annual ENETS Conference (2014)
Category: Basic Science - mTOR and other pathways, signalling, receptors
Presenting Author: Dr. Simona Glasberg
#430 mTOR Inhibitors Hamper Cell Viability in Selected Human Medullary Thyroid Carcinoma Primary Cultures
Introduction: It has been demonstrated that mTOR inhibitors have potent anti-proliferative effects in a human Medullary Thyroid Carcinoma (MTC) cell line. We here explore the possible role of mTOR inhibitors, Everolimus and BEZ235 (which also inhibits the PI3K pathway) on the effects of Insulin-like Growth Factor-1 (IGF-1) in human MTC primary cultures.
Conference: 9th Annual ENETS Conference (2012)
Category: Basic
Presenting Author: Mrs. Mariella Minoia
#38 Expression of mTOR signaling pathway and effects of mTOR inhibitors on its pathway in human neuroendocrine tumors
Introduction: Neuroendocrine tumors (NET), especially well-differentiated endocrine tumors, are often slow-growing, indolent, and may not become clinically apparent until the manifestations of metastatic spread or carcinoid syndrome. Results of previous studies demonstrated that phosphoinositide 3-kinase (PI3K)/Akt/mTOR signaling pathway may be activated in the great majority of NET cells. mTOR inhibitors are therefore considered effective anti-tumor reagents but they may also induce an activation of PI3K/Akt and MAPK pathways as a compensatory action and reduce their own anti-tumor activities.
Conference: 7th Annual ENETS Conference (2010)
Category: Basic
Presenting Author: Professor Hironobu Sasano
Authors: Iida S, Miki Y, Ono K, Sasano H, ...
#1494 CDK-Inhibitors as New Therapeutic Treatment for Human Bronchial Carcinoids
Introduction: Bronchial Carcinoids (BC) are still orphan of medical therapy. We previously demonstrated that 70% of primary BC cultures are sensitive to Everolimus (E), an mTOR inhibitor, while 30% are not. We also observed that in 2 human BC cell lines, the NCI-H720 (sensitive to E) and NCI-H727 (resistant to E), mTOR resistance may be linked to a differential cell cycle protein expression (CyclinD1/E, CDK2/4, p27kip1/p27kip1phospho-Ser10), which is higher in BC resistant to E as compared to sensitive ones, suggesting an impaired p27 function
Conference: 13th Annual ENETS conference (2016)
Category: Medical treatment - Others
Presenting Author: MASTER DEGREE Katiuscia Benfini
#66 Adrenocortical cancer: a therapeutic approach with everolimus (RAD001)
Introduction: Adrenocortical cancer (ACC) is a rare disease with very poor outcome. ACC responds poorly to standard chemotherapy. Mitotane, used as adjuvant therapy to surgery, prolongs recurrence-free survival, but the response is limited to 23% of patients and resistance occurs in the majority of patients (1). There is no curative therapy for ACC. Pre-clinical studies have shown involvement of both IGF-2/IGF-1R and Akt/mTOR pathways in ACC, and IGF-1R and mTOR inhibitors inhibited cell proliferation of human adrenocortical carcinoma cell lines in vitro (2,3,4).
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Maria Gueorguiev
#53 The rise and fall of chromogranin A as an indicator for NET
Introduction: There is now general awareness that treatment with proton pump inhibitors (ppi) may cause moderate rises in circulating concentrations of gastrin and/or chromogranin A (CgA), thus decreasing the specificity of these markers in the diagnosis of neuroendocrine tumors (NETs). Due to their high efficacy, proton pump inhibitors (ppi) are one of the most frequently prescribed classes of drugs worldwide. Several studies in various countries report that 30% or more of in-patients have been prescribed ppi. Patients who are suspected of having a neuroendocrine tumor (NET) often have gastrointestinal (GI) symptoms for which ppi are prescribed and therefore they may be already taking ppi when their first blood sample is assayed for NET markers. We previously encountered a case of extreme rise in CgA which flagged the possibility of a NET, but was later shown to be due to ppi therapy alone. We present CgA and gastrin data in relation to ppi therapy and withdrawal for this patient. In order to see if this was an isolated incident, we audited all laboratory requests for CgA/gastrin in a two-year period and monitored those that provided details of ppi treatment/withdrawal.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Lee Armstrong
Authors: Armstrong L, Ryan K, Ardill J, ...
#392 A 67-Year Old Woman with a Carcinoid Tumor of the Coccyx with Liver Metastases
Introduction: Neuroendocrine tumors (NETs) are tumors of the interface between the endocrine and nervous system. They are characterized by the presence of secretory granules, as well as the ability to produce biogenic amines and polypeptide hormones. The clinical behavior of NETs is extremely variable; they may be functioning or non-functioning, ranging from very slow-growing tumors, which are the majority, to highly aggressive and very malignant tumors. Many case reports of rare sites of primary NETs outside the gastrointestinal tract have been described, as tumors with neuroendocrine characteristics can occur in virtually any organ or tissue. Nevertheless, this is the first case of a metastatic coccygeal carcinoid tumor ever described.
Conference: 9th Annual ENETS Conference (2012)
Category: Basic
Presenting Author: Dr Theodors Angelopoulos
#726 Expression and Phosphorilation of mTOR Pathway and Antitumor Activity of mTOR Inhibitors in Neuroendocrine Tumors
Introduction: The mammalian target of rapamycin (mTOR) is a protein kinase involved in the control of cancer cell metabolism, growth and proliferation. The mTOR pathway has attracted broad scientific and clinical interest, particularly in light of the ongoing clinical cancer trials with mTOR inhibitors in pts with neuroendocrine tumors (NETs). To identify the best candidates for treatment with mTOR inhibitors is challenging.
Conference: 10th Annual ENETS Conference (2013)
Category: Epidemiology/Natural history/Prognosis - Registries, nationwide and regional surveys
Presenting Author: Concetta Sciammarella
#850 Expression of IGF/mTOR Pathway Components in Human Pheochromocytomas and In Vitro Inhibition of PC12 rat Pheochromocytoma Cell Growth by mTOR Inhibitors alone and in Combination with the Dual IGFI-R/INS-R Antagonist OSI-906
Introduction: Dysregulation of the mTOR and IGF pathways have been suggested to be involved in the pathogenesis of pheochromocytomas (PCC). mTOR inhibitors, such as sirolimus (S) and everolimus (E), as well as IGFI-R antagonists such as OSI-906, could be new a treatment for malignant PPC.
Conference: 11th Annual ENETS Conference (2014)
Category: Non digestive NETs (bronchial, MTC, pheochromocytoma)
Presenting Author: MD Maria Cristina De Martino
#1221 Pancreatic Location, High Proliferation and Low p-mTOR Expression Levels Are More Frequent in Neuroendocrine Tumor Patients Responsive to mTOR Inhibitors: Results from a Preliminary Study
Introduction: MTOR inhibitors are approved for the treatment of advanced neuroendocrine tumors. However, scarce data are available on clinical or pathological predictors of response to these agents
Conference: 12th Annual ENETS Conference (2015)
Category: Medical treatment - Targeted therapies
Presenting Author: MD, PhD Marco Volante