Disorder in the Serotonergic System due to Tryptophan Hydroxylation Impairment: A Cause of Hypothalamic Syndrome?

被引:7
作者
Schott, D. A. [1 ]
Nicolai, J. [2 ]
de Vries, J. E. [3 ]
Keularts, I. M. L. W. [3 ]
Rubio-Gozalbo, M. E. [1 ,3 ]
Gerver, W. J. M. [1 ]
机构
[1] Maastricht Univ Med Ctr, Dept Paediat, NL-6202 AZ Maastricht, Netherlands
[2] Maastricht Univ Med Ctr, Dept Neurol, Maastricht, Netherlands
[3] Maastricht Univ Med Ctr, Dept Biochem Genet, Maastricht, Netherlands
来源
HORMONE RESEARCH IN PAEDIATRICS | 2010年 / 73卷 / 01期
关键词
Serotonin; Tryptophan hydroxylase; Hypothalamus; TPH2; protein; Obesity; GONADOTROPIN-RELEASING-HORMONE; ONSET CENTRAL HYPOVENTILATION; ALVEOLAR HYPOVENTILATION; PRECOCIOUS PUBERTY; PINEAL-GLAND; DYSFUNCTION; RAT; ASSOCIATION; MELATONIN; CHILD;
D O I
10.1159/000271918
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background: The hypothalamus regulates basic homeostasis such as appetite, circadian rhythm, autonomic and pituitary functions. Dysregulation in these functions results in the hypothalamic syndrome, a rare disorder of various origins. Since serotonin (5-HT) modulates most of the above-mentioned homeostasis, a defect in the serotonergic system can possibly participate in this syndrome. Methods: We describe a girl suffering from hypothalamic syndrome with a decreased concentration of 5-hydroxytryptophan (5-HTP) and a normal level of tryptophan in the cerebrospinal fluid (CSF) suggesting a functional defect in tryptophan hydroxylase (TPH). TPH is a rate-limiting enzyme in the synthesis of the neurotransmitter 5-HT. Results: Therapeutic intervention with 5-HTP, carbidopa and a specific serotonin reuptake inhibitor significantly improved her clinical symptoms and caused biochemical normalisation of neurotransmitters. Conclusion: The girl described had the typical symptoms of a hypothalamic disorder and a defective serotonergic metabolism, a relationship which has not been reported before. Therapeutic interventions to restore 5-HT metabolism resulted in clinical improvement. We suggest that investigation of 5-HT metabolism in CSF of patients with this rare disorder is included in the aetiological work-up. Copyright (C) 2010 S. Karger AG, Basel
引用
收藏
页码:68 / 73
页数:6
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