Keyphrases
Intestine
100%
Serum Serotonin
100%
Serotonin Metabolism
100%
5-hydroxytryptamine
100%
Acute Tryptophan Depletion
100%
Kynurenic Acid
57%
5-hydroxyindoleacetic Acid (5-HIAA)
42%
Acid Concentration
42%
Intestinal Barrier Function
28%
Mucosal Concentration
28%
Placebo Groups
28%
5-HT Metabolism
28%
Placebo
14%
Randomized Placebo-controlled Trial
14%
Tryptophan
14%
Healthy Volunteers
14%
Biopsy Specimen
14%
Central Nervous System
14%
Acute Stress
14%
Serotonin
14%
Endoscopy
14%
Duodenal Biopsy
14%
Regulatory Role
14%
Biochemical Response
14%
Serotonergic
14%
Gastrointestinal Tract
14%
Tight Junction
14%
Metabolic Pathway
14%
Endoscopic Diagnosis
14%
Systemic Concentration
14%
Tryptophan Metabolites
14%
Gastroduodenoscopy
14%
Plasma Analysis
14%
Systemic Availability
14%
Plasma Test
14%
HPLC-mass Spectrometry
14%
INIS
tryptophan
100%
metabolism
100%
concentration
100%
intestines
100%
serotonin
100%
plasma
50%
kynurenic acid
40%
availability
20%
metabolites
20%
barriers
20%
precursor
20%
biopsy
10%
humans
10%
competition
10%
comparative evaluations
10%
design
10%
mass spectrometry
10%
central nervous system
10%
junctions
10%
permeability
10%
transcription
10%
gastrointestinal tract
10%
hplc
10%
metabolic pathways
10%
Biochemistry, Genetics and Molecular Biology
Serotonin Metabolism
100%
Tryptophan
100%
Blood Plasma
62%
Kynurenic Acid
50%
Metabolic Pathway
37%
Precursor
25%
Intestinal Mucosal Barrier
25%
Serotonin
25%
Normal Human
12%
Metabolite
12%
Mass Spectrometry
12%
Serotonergic
12%
High-Performance Liquid Chromatography
12%
Gastrointestinal Tract
12%
Transcription
12%
Acute Stress
12%
Tryptophan Metabolism
12%
Immunology and Microbiology
Intestine
100%
Serotonin Metabolism
100%
Tryptophan
100%
Blood Plasma
62%
Precursor
25%
Normal Human
12%
Metabolite
12%
Tight Junction
12%
Gastrointestinal Tract
12%
High Performance Liquid Chromatography
12%
Central Nervous System
12%
Tryptophan Metabolism
12%
Acute Stress
12%
Pharmacology, Toxicology and Pharmaceutical Science
Tryptophan
100%
Serotonin
100%
Kynurenic Acid
44%
Placebo
33%
5 Hydroxyindoleacetic Acid
33%
Normal Human
11%
Placebo-Controlled Study
11%
High Performance Liquid Chromatography
11%