Abstract
Purpose
Inborn errors of neurotransmitters are rare monogenic diseases. In general, conventional neuroimaging is not useful for diagnosis. Nevertheless, advanced neuroimaging techniques could provide novel diagnosis and prognosis biomarkers. We aim to describe cerebral volumetric findings in a group of Spanish patients with neurotransmitter disorders.
Methods
Fifteen 3D T1-weighted brain images from the International Working Group on Neurotransmitter related Disorders Spanish cohort were assessed (eight with monoamine and seven with amino acid disorders). Volumes of cortical and subcortical brain structures were obtained for each patient and then compared with those of two healthy individuals matched by sex and age.
Results
Regardless of the underlying disease, patients showed a smaller total cerebral tissue volume, which was apparently associated with clinical severity. A characteristic volumetric deficit pattern, including the right Heschl gyrus and the bilateral occipital gyrus, was identified. In severe cases, a distinctive pattern comprised the middle and posterior portions of the right cingulate, the left superior motor area and the cerebellum. In succinate semialdehyde dehydrogenase deficiency, volumetric affection seems to worsen over life.
Conclusion
Despite the heterogeneity and limited size of our cohort, we found novel and relevant data. Total volume deficit appears to be a marker of severity, regardless of the specific neurotransmitter disease and irrespective of the information obtained from conventional neuroimaging. Volumetric assessment of individual brain structures could provide a deeper knowledge about pathophysiology, disease severity and specific clinical traits.
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Abbreviations
- GABA:
-
Gamma-aminobutyric acid
- CSF:
-
Cerebrospinal fluid
- MRI:
-
Magnetic resonance imaging
- iNTD:
-
International Working Group on Neurotransmitter related Disorders
- AADCD:
-
Aromatic amino acid decarboxylase deficiency
- ADGTPCHD:
-
Autosomal dominant GTP cyclohydrolase deficiency
- ARGTPCHD:
-
Autosomal recessive GTP cyclohydrolase deficiency
- MAOA-BD:
-
Monoamine oxidase A and B deficiency
- NKH:
-
Non-ketotic hyperglycinemia
- PTPSD:
-
6-Pyruvoyl-tetrahydropterin synthase deficiency
- SSADHD:
-
Succinate-semialdehyde-dehydroxylase deficiency
- THD:
-
Tyrosine hydroxylase deficiency
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Acknowledgements
We thank the patients and their parents for their support and participation in this study.
Funding
This work was supported by the FIS P118/00111 “Instituto de Salud Carlos III (ISCIII)” and “Fondo Europeo de desarrollo regional (FEDER)”.
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Authors and Affiliations
Contributions
Chiara Alfonsi: conceptualization; data curation; resources; formal analysis; investigation; methodology; writing—original draft.
Christian Stephan-Otto: conceptualization; formal analysis; investigation; methodology; resources; software; validation; writing—original draft.
Elisenda Cortès-Saladelafont: conceptualization; data curation; writing—original draft.
Inés Podzamczer-Valls: data curation.
Natalia Juliá Palacios, Nuria Gutiérrez Cruz, María Rosario Domingo Jiménez, Salvador Ibáñez Micó, Miguel Tomás Vila, Ramón Velázquez Fragua, Teresa Gómez, Oscar Alcoverro Fortuny, Inmaculada García Jiménez, Eduardo López Laso, Ana Roche Martínez: data curation; resources; writing—review and editing.
Kathrin Jeltsch, Oya Kuseyri Hübschmann, Thomas Opladen: writing—review and editing.
Muchart Jordi López: data curation; software; resources; writing—review and editing.
Àngels Garcia-Cazorla: conceptualization; funding acquisition; investigation; project administration; resources; supervision; validation; visualisation; writing—review and editing.
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Ethics approval
The study was approved by the local ethics committee (ID number: PIC-131–18). All the procedures were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2013.
Consent to participate
Oral and written informed consent was obtained from all subjects or their parents/legal guardians regarding publishing their data. Images from control subjects were obtained from a local anonymized MRI database, for which the patients or their parents/legal guardians gave informed consent.
Conflict of interest
Dr. Cortès-Saladelafont reports personal fees from Takeda, outside the submitted work. Dr. Kuseyri Hübschmann reports personal fees from PTC Therapeutics GT, outside the submitted work. Dr. López-Laso has received honoraria as an invited speaker and has also received consultation fees from PTC Therapeutics, outside the submitted work. Dr. Ibáñez-Micó reports grants and personal fees from PTC Therapeutics, during the conduct of the study. Dr. Alfonsi, Dr. Stephan-Otto, Dr. Juliá Palacios, Dr. Podzamczer-Valls, Dr. Nuria Gutiérrez, Dr. Kathrin Jeltsch, Dr. Velázquez Fragua, Dr. Alcoverro-Fortuny, Dr. Teresa Gómez, Dr. Roche Martínez and Dr. Muchart López have nothing to disclose.
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Alfonsi, C., Stephan-Otto, C., Cortès-Saladelafont, E. et al. Volumetric study of brain MRI in a cohort of patients with neurotransmitter disorders. Neuroradiology 64, 2179–2190 (2022). https://doi.org/10.1007/s00234-022-02989-8
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DOI: https://doi.org/10.1007/s00234-022-02989-8