Abstract library

83 results for "serotonin synthesis".
#121 Serotonin synthesis inhibitors: a novel approach for managing gastrointestinal symptoms in carcinoid syndrome
Introduction: Carcinoid syndrome (CS) occurs when metastatic carcinoid tumors secrete large amounts of serotonin (5-HT) and other bioactive substances into systemic circulation, causing a variety of symptoms, including GI symptoms such as profound diarrhea. Reduction in 5-HT production by the tumor would be expected to improve symptoms in patients with CS.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Jay L Mitchell
#870 Telotristat Etiprate (TE) in a Cohort of Carcinoid Heart Disease Patients in Two Phase 2 Trials
Introduction: Serotonin is a key mediator of carcinoid syndrome (CS). High levels of urinary 5-hydroxyindoleacetic acid (u5-HIAA, a serotonin metabolite) have also been linked with carcinoid heart disease (CaHD). Telotristat etiprate (TE), a novel, oral inhibitor of serotonin synthesis, is in Phase 3 development for the treatment of CS.
Conference: 11th Annual ENETS Conference (2014)
Category: Medical treatment - Others
Presenting Author: Darren Wheeler
#612 Serotonin in Blood: Assessment of its Origin by Concomitant Determination of β-Thromboglobulin (platelets) and Chromogranin A (enterochromaffin cells)
Introduction: Serotonin is produced in enterochromaffin (EC) cells, taken up and stored in platelets and released during platelet activation. Measurement of platelet-poor plasma serotonin is difficult, mainly due to platelet activation during blood sampling.
Conference: 10th Annual ENETS Conference (2013)
Category: Biomarkers
Presenting Author: Øyvind Hauso
#1917 Clinical Correlates of Discrepant Results of Chromogranin a versus Serotonin Markers in Patients with Neuroendocrine Tumors
Introduction: Neuroendocrine tumors lead to elevated chromogranin A levels and elevated serotonin markers (urinary 5HIAA and platelet serotonin). These markers are employed for diagnosis and monitoring.
Conference: 14th Annual ENETS conference (2017)
Category: Biomarkers
Presenting Author: Dr Wim Meijer
Authors: Meijer W, Bruikman C, Beukeveld G, ...
#140 Serotonin expression in gastric neuroendocrine tumors and in foci of endocrine cell hyperplasia
Introduction: The most abundant neuroendocrine (NE) cell population of the human oxyntic mucosa is the enterochromaffin-like (ECL) cells, followed by ghrelin, somatostatin and serotonin cells, respectively. All types of ECL cell carcinoids (ECL-CCs) contain serotonin cells but in a varying frequency. Hitherto, only foci of ECL and ghrelin cell hyperplasia have been described in the peritumorous mucosa of types I and II ECL-CCs. It is established that hypergastrinaemia can cause ECL cell hyperplasia but it does not affect serotonin cells. The vesicular monoamine transporter 2 (VMAT 2) is used as an immunohistochemical marker for ECL cells.
Conference: 7th Annual ENETS Conference (2010)
Category: Basic
Presenting Author: MD, PhD Apostolos Tsolakis
Authors: Tsolakis A, Falkmer S, Grimelius L, ...
#1150 Platelet Serotonin But Not Dopamine Concentrations Are Lower in Pancreatic Neuroendocrine Tumor and Renal Cell Carcinoma Patients Compared to Healthy Individuals.
Introduction: Platelets carry VEGF-A, serotonin and dopamine. Serotonin stimulates and dopamine inhibits tumor angiogenesis. We hypothesized that platelets are activated in tumor vasculature and release angiogenic factors, resulting in lower platelet serotonin and dopamine.
Conference: 12th Annual ENETS Conference (2015)
Category: Basic Science - mTOR and other pathways, signalling, receptors
Presenting Author: Marloes Peters
#1935 Prevalence of Pancreatic Neuroendocrine Neoplasms with Serotonin Secretion
Introduction: Pancreatic neuroendocrine neoplasms (pNENs) are rare neoplasms and represent 1-2% of all pancreatic neoplasms. These tumors can secrete a variety of hormonally active substances producing distinct clinical symptoms, or can be clinically non-functioning. Pancreatic NENs that secrete serotonin are extremely rare, but their prevalence has not been explored adequately.
Conference: 14th Annual ENETS conference (2017)
Category: Epidemiology/Natural history/Prognosis - Prognosis
Presenting Author: MD, MSc, PhD Nikolaos Tsoukalas
#256 Evaluation of the Association Between Serotonin and Bone Mineral Density in Patients with Neuroendocrine Tumors
Introduction: Bone mineral density (BMD) and fractures are influenced by diet, activity, drugs and hormones. Recent studies highlight an inverse relationship between serotonin and BMD.
Conference: 8th Annual ENETS Conference (2011)
Category: Clinical
Presenting Author: Dr Maralyn R Druce
#304 Hepatic Neuroendocrine Tumor Metastasis Proliferation is Hepatocyte Regulated Via a 5HT7 Mediated Induction of an IGF 1 and HGF Feedback Loop Mediated by cAMP, PKA-independent pAKT and pCREB
Introduction: Carcinoid serotonin (5-HT) causes local fibrosis but the effect of 5-HT on hepatocytes has not been established. We hypothesized that tumors and hepatocytes form a metastasis-supportive environment.
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: Dr Mark Kidd
Authors: Svejda B, Kidd M, Lawrence B, Alaimo D, ...
#1068 Telotristat Etiprate in a Subset of Carcinoid Syndrome Patients Who Have High Levels of Urinary 5-hydroxyindoleacetic Acid and Frequent Flushing
Introduction: Serotonin is a key mediator of carcinoid syndrome (CS). CS patients (pts) with high levels of urinary 5-hydroxyindoleacetic acid (u5-HIAA, a serotonin metabolite) and >3 flushing episodes/day are at increased risk of developing carcinoid heart disease (CaHD).
Conference: 12th Annual ENETS Conference (2015)
Category: Medical treatment - Others
Presenting Author: Darren Wheeler