BACKGROUND Carcinoid tumors are associated with the carcinoid syndrome, a set of symptoms resulting from the peptide and amine products, including serotonin, secreted from the cancer cells. The purpose of this study was to investigate the relationship between the phosphatidylinositol-3-kinase/protein kinase B (PI3K/Akt) inhibitor PTEN (phosphatase and tensin homolog deleted on chromosome ten) a...

The pathogenesis of flushing attacks in patients with malignant carcinoid tumors is attributed to the direct pharmacologic effect of excessive amounts of circulating serotonin. It was hoped that potent serotonin antagonists might relieve symptoms of the carcinoid syndrome in the inoperable patient. The nature of flushing attacks was studied in carcinoid patients and the influence thereon of 3 s...

Psilocybin, an indoleamine hallucinogen, produces a psychosis-like syndrome in humans that resembles first episodes of schizophrenia. In healthy human volunteers, the psychotomimetic effects of psilocybin were blocked dose-dependently by the serotonin-2A antagonist ketanserin or the atypical antipsychotic risperidone, but were increased by the dopamine antagonist and typical antipsychotic halop...

The pathogenesis of flushing attacks in patients with malignant carcinoid tumors is attributed to the direct pharmacologic effect of excessive amounts of circulating serotonin. It was hoped that potent serotonin antagonists might relieve symptoms of the carcinoid syndrome in the inoperable patient. The nature of flushing attacks was studied in carcinoid patients and the influence thereon of 3 s...

The pathogenesis of flushing attacks in patients with malignant carcinoid tumors is attributed to the direct pharmacologic effect of excessive amounts of circulating serotonin. It was hoped that potent serotonin antagonists might relieve symptoms of the carcinoid syndrome in the inoperable patient. The nature of flushing attacks was studied in carcinoid patients and the influence thereon of 3 s...

OCD is a syndrome characterized by obsessions and compulsions, as well other neuropsychiatric features, often associated with primary psychiatric disorders various neurologic conditions. If severe, can seriously interfere the patient’s quality of life. The mainstay treatment psychotherapy, especially cognitive-behavioural therapy, pharmacologic interventions, selective serotonin reuptake inhibi...

Introduction Serotonin syndrome (SS) is a toxic state characterized by increased serotonin activity. It has been suggested that severe usually involves monoaminoxidase inhibitors (MAOIs). Objectives To quantify in how far SS associated with MAOIs. Methods Systematic review and quantitative analysis of all cases published between 1 January 2004 31 December 2014. Severe was defined as cases, eith...

Submit Manuscript | http://medcraveonline.com Abbreviations: TCAs: Tricyclic Antidepressants; SSRIs: Selective Serotonin-Reuptake Inhibitors; MAOIs: Monoamine Oxidase Inhibitors; SNRI: Serotonin-Norepinephrine Reuptake Inhibitor; PMDD: Premenstrual Dysphoric Disorder; SAD: Seasonal Affective Disorder; PMS: Premenstrual Syndrome; NE: Norepinephrine; 5-HT: 5-Hydroxytryptamine; DA: Dopamine; CNS: ...

Carcinoid patients are diagnosed biochemically on the basis of increased urinary excretion of 5-hydroxyindoleacetic acid (5-HIAA); urinary and platelet serotonin concentrations are considered to provide complementary information. Using established HPLC methods with fluorometric detection, we evaluated the clinical usefulness of measurements of urinary 5-HIAA and urinary, plasma, and platelet se...