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Neuroendocrine Dysregulation in Irritable Bowel Syndrome Patients: A Pilot Study
( Cristina Stasi ),( Massimo Bellini ),( Dario Gambaccini ),( Emiliano Duranti ),( Nicola De Bortoli ),( Bernardo Fani ),( Eleonora Albano ),( Salvatore Russo ),( Isabella Sudano ),( Giacomo Laffi ),( 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2017 Journal of Neurogastroenterology and Motility (JNM Vol.23 No.3
Background/Aims Irritable bowel syndrome (IBS) is a multifactorial disorder, involving dysregulation of brain-gut axis. Our aim was to evaluate the neuroendocrine activity in IBS. Methods Thirty IBS and 30 healthy volunteers were enrolled. Psychological symptoms were evaluated by questionnaires. Urinary 5-hydroxyindoleacetic acid, plasma serotonin (5-hydroxytryptamine, 5-HT), endothelin, and neuropeptide Y (NPY), and plasma and urinary cortisol levels were evaluated. Fourteen IBS subjects underwent microneurography to obtain multiunit recordings of efferent postganglionic muscle sympathetic nerve activity (MSNA). Results Prevalent psychological symptoms in IBS were maladjustment (60%), trait (40%) and state (17%) anxiety, obsessive compulsive-disorders (23%), and depressive symptoms (23%). IBS showed increased NPY (31.9 [43.7] vs 14.8 [18.1] pmol/L, P = 0.006), 5-HT (214.9 [182.6] vs 141.0 [45.5] pg/mL, P = 0.010), and endothelin [1.1 [1.4] vs 2.1 [8.1] pg/mL, P = 0.054], compared to healthy volunteers. Moreover, plasma NPY, endothelin, cortisol and 5-HT, and urinary 5-hydroxyindoleacetic acid were associated with some psychological disorders (P ≤ 0.05). Despite a similar resting MSNA, after cold pressor test, IBS showed a blunted increase in MSNA burst frequency (+4.1 vs +7.8 bursts/min, P = 0.048; +30.1% vs +78.1%, P = 0.023). Baseline MSNA tended to be associated with urinary cortisol (ρ = 0.557, P = 0.059). Moreover, changes in heart rate after mental stress were associated with urinary cortisol (ρ = 0.682, P = 0.021) and changes in MSNA after mental stress were associated with plasma cortisol (ρ = 0.671, P = 0.024).” Conclusion Higher concentrations of endothelin, NPY, and 5-HT were found to be associated with some psychological disorders in IBS patients together with an altered cardiovascular autonomic reactivity to acute stressors compared to healthy volunteers. (J Neurogastroenterol Motil 2017;23:428-434)