Abstract library

12 results for "tryptophan".
#1436 Up-Regulation of the Immunoregulatory Enzyme Indoleamine-2,3-Dioxygenase (IDO) with Consecutive Tryptophan Depletion Predicts Death in Patients with Neuroendocrine Neoplasia
Introduction: Data from a considerable number of malignancies demonstrate that depletion of the essential amino acid tryptophan via induction of the immuno-regulatory enzyme Indoleamine-2,3-dioxygenase (IDO) serves as an important tumour escape strategy and is of prognostical importance.
Conference: 13th Annual ENETS conference (2016)
Category: Biomarkers
Presenting Author: Dr René Pschowski
Authors: Pschowski R, Pape U F, Fusch G, Jann H, ...
#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
#1333 Efficacy and Safety of Telotristat Etiprate in Patients with Carcinoid Syndrome not Adequately Controlled by Somatostatin Analog Therapy: Analysis of the Ongoing TELESTAR Extension Period
Introduction: TELESTAR was a pivotal, randomized phase 3 study evaluating telotristat etiprate (TE), a tryptophan hydroxylase inhibitor, among patients (pts) with carcinoid syndrome (CS). When added to somatostatin analogues (SSA), 250 mg tid and 500 mg tid TE each produced significantly greater bowel movement (BM) frequency reduction averaged over 12 weeks (wks) than placebo (PBO) plus SSA (p<0.001). Pts crossed over to open-label (OL) treatment with TE 500 mg tid after Wk 12. The extension phase (Wk 13 to Wk 48) is still ongoing
Conference: 13th Annual ENETS conference (2016)
Category: Medical treatment - Others
Presenting Author: Dieter Hörsch
Authors: Hörsch D, Kulke M, Caplin M, Anthony L, ...
#1099 Niacin (vitamin B3) Suppletion in Patients with Serotonin Producing Neuroendocrine Tumors
Introduction: Tryptophan is the precursor of serotonin and niacin (vitamin B3), critical for normal cellular metabolism. Tryptophan and niacin can be deficient in patients with serotonin producing neuroendocrine tumors (NETs). Niacin deficiency can lead to symptoms including pellagra.
Conference: 12th Annual ENETS Conference (2015)
Category: Medical treatment - Others
Presenting Author: MD Grietje Bouma
#1884 Towards Optimal Personalized Diet and Vitamin Supplementation in NET Patients; A Feasibility Study
Introduction: Patients with a neuroendocrine tumor (NET) often have gastro-intestinal complaints due to somatostatin analogue (SSA), tumor mass, secretion of neuroendocrine amines or treatment. This can lead to impaired absorption of critical food components such as vitamins. Serotonin producing NET patients may also have low plasma tryptophan.
Conference: 14th Annual ENETS conference (2017)
Category: Medical treatment - Others
Presenting Author: drs Ld de Hosson
#455 Depression and Carcinoid Syndrome: Is There Any Relationship? A Cross-Sectional Study
Introduction: The relationship between brain serotonin and depression is well-established. It is also widely accepted that serotonin hyperproduction in carcinoid syndrome does not cross the brain barrier. CNS serotonin is synthesised from tryptophan within serotonergic neurons and a deficiency of this precursor could be possible on carcinoid patients.
Conference: 9th Annual ENETS Conference (2012)
Category: Clinical
Presenting Author: Mr Jorge Garcia-Hernandez
#849 Patient-Reported Symptom Experiences Following Participation in a Study of Telotristat Etiprate for Patients with Neuroendocrine Tumors and Diarrhea Not Adequately Controlled on Octreotide
Introduction: Telotristat etiprate (LX1606), an oral tryptophan hydroxylase (TPH) inhibitor, was recently evaluated in a dose-escalation (DE) study in patients (pts) with carcinoid tumors and diarrhea not adequately controlled on octreotide.
Conference: 11th Annual ENETS Conference (2014)
Category: Medical treatment - Others
Presenting Author: Dr. Matthew H Kulke
#1272 Telotristat Etiprate Appears to Halt Carcinoid Heart Disease
Introduction: Carcinoid Heart Disease (CHD) is a serious complication of the Carcinoid Syndrome (in as many as 50% of patients during the course of their disease). 46% of cases operated with bioprosthetic valves develop recurrent carcinoid valvulopathy on the newly implanted tissue valves. Until now, only mechanical prosthetic valves avoid recurrent fibrosis.
Conference: 13th Annual ENETS conference (2016)
Category: Medical treatment - Others
Presenting Author: MD, FACC, FCCP Jerome Zacks
Authors: Zacks J, Lavine R, Ratner L, Warner R, ...
#1812 Correlation of Plasma (p) and Urine (u) 5-HIAA Levels in Patients (pts) with Carcinoid Syndrome (CS) – Post-Hoc Analyses from the TELESTAR Study
Introduction: Telotristat ethyl (TE) is an oral tryptophan hydroxylase inhibitor in development for treating CS symptoms. During the double-blind treatment [DBT] period of the phase 3, 12-week, placebo-controlled TELESTAR study, TE was well tolerated and significantly reduced bowel-movement frequency and u5-HIAA levels compared with placebo (PBO) in NET patients with CS treated with a SSA.
Conference: 14th Annual ENETS conference (2017)
Category: Medical treatment - Others
Presenting Author: Marianne Pavel
#1940 Impact of Concomitant Medication on Efficacy of Telotristat Ethyl – A Post Hoc Subgroup Analysis of the Phase 3 TELESTAR Study in Carcinoid Syndrome
Introduction: The tryptophan hydroxylase inhibitor telotristat ethyl (TE) significantly reduced bowel movement (BM) frequency versus placebo (pbo) in patients (pts) with carcinoid syndrome (CS) in the TELESTAR study.
Conference: 14th Annual ENETS conference (2017)
Category: Medical treatment - Targeted therapies
Presenting Author: Lowell Anthony
Keywords: serotonin, diarrhea
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