Neurotransmitter disorders are a group of neurometabolic syndromes caused by disturbances of neurotransmitter metabolism. The primary aim of this retrospective study is to present patients with disturbances of monoamine neurotransmitter metabolism. Cerebrospinal fluid (CSF) neurotransmitter measurements and genetic analysis were performed on five patients. Five patients who had various movement disorders and motor and cognitive disabilities were included. Four patients were diagnosed with sepiapterin reductase (SR) deficiency, and one was diagnosed with aromatic L-amino acid decarboxylase (AADC) deficiency. Different treatment responses appeared in patients with SR and AADC deficiency. The responses to drug treatment ranged from good to weak in our patients. The diagnosis process is challenging in patients with SR and AADC deficiency, which present similar clinical features to other neurological and metabolic diseases. Investigations of neurotransmitters in CSF and analysis of related genes are essential to differentiate disturbances of monoamine neurotransmitter metabolism from other neurometabolic diseases. For patients with monoamine neurotransmitter disorders, drugs that target these disturbances should be combined as necessary to produce the appropriate response.
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The author would like to thank all our patients and their parents for teaching us about the diseases. Also, we thank Dr. Özkurt for his help in the laboratory.
This article does not contain any studies with human participants or animals performed by any of the authors.
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Havalı, C., Dorum, S., Ekici, A. et al. Approaches for diagnosis and treatment in neurotransmitter disorders of childhood. Metab Brain Dis (2021). https://doi.org/10.1007/s11011-021-00838-w
- Inherited neurotransmitter disorders
- Sepiapterin reductase
- AADC deficiency movement disorders
- Monoamine metabolism