RT Journal Article T1 The International Working Group on Neurotransmitter related Disorders (iNTD): A worldwide research project focused on primary and secondary neurotransmitter disorders. A1 Opladen, Thomas A1 Cortès-Saladelafont, Elisenda A1 Mastrangelo, Mario A1 Horvath, Gabriella A1 Pons, Roser A1 Lopez-Laso, Eduardo A1 Fernández-Ramos, Joaquín A A1 Honzik, Tomas A1 Pearson, Toni A1 Friedman, Jennifer A1 Scholl-Bürgi, Sabine A1 Wassenberg, Tessa A1 Jung-Klawitter, Sabine A1 Kuseyri, Oya A1 Jeltsch, Kathrin A1 Kurian, Manju A A1 Garcia-Cazorla, Àngels A1 International Working Group on Neurotransmitter related disorders (iNTD), K1 3-PGDH, 3-phosphoglycerat dehydrogenase K1 3-PGH, 3-phosphoglycerat dehydrogenase K1 3-PSP, 3-phosphoserine phosphatase K1 5-MTHF, 5-methyltetrahydrofolate K1 AADC, aromatic l-amino acid decarboxylase K1 AR/ADGTPCH, autosomal recessive/dominant GTP-cyclohydrolase deficiency K1 BH4, tetrahydrobiopterin K1 DAT, dopamine transporter K1 DHFR, dihydrofolate reductase deficiency K1 DHPR, dihydropteridine reductase K1 Database K1 Dopamine K1 DßH, dopamine β-hydroxylase K1 FOLR1, folate receptor alpha K1 GABA K1 GABA, gamma aminobutyric acid K1 Glycine K1 Guideline K1 MAOA, monoamine oxidase A K1 NKH, nonketotic hyperglycinemia K1 NOS, nitric oxide synthase K1 Network K1 Neurotransmitter K1 PAH, phenylalanine hydroxylase K1 PSAT, phosphoserine aminotransferase K1 PTPS, 6-pyruvoyl-tetrahydropterin synthase K1 Patient registry K1 SR, sepiapterin reductase K1 SSADH, succinic semialdehyde dehydrogenase K1 Serine K1 Serotonin K1 TH, tyrosine hydroxylase K1 TPH, tryptophan hydroxylase K1 VMAT, vesicular monoamine transporter AB Neurotransmitters are chemical messengers that enable communication between the neurons in the synaptic cleft. Inborn errors of neurotransmitter biosynthesis, breakdown and transport are a group of very rare neurometabolic diseases resulting in neurological impairment at any age from newborn to adulthood. The International Working Group on Neurotransmitter related Disorders (iNTD) is the first international network focusing on the study of primary and secondary neurotransmitter disorders. It was founded with the aim to foster exchange and improve knowledge in the field of these rare diseases. The newly established iNTD patient registry for neurotransmitter related diseases collects longitudinal data on the natural disease course, approach to diagnosis, therapeutic strategies, and quality of life of affected patients. The registry forms the evidence base for the development of consensus guidelines for patients with neurotransmitter related disorders. The iNTD network and registry will improve knowledge and strengthen research capacities in the field of inborn neurotransmitter disorders. The evidence-based guidelines will facilitate standardized diagnostic procedures and treatment approaches. SN 2214-4269 YR 2016 FD 2016-10-20 LK https://hdl.handle.net/10668/27101 UL https://hdl.handle.net/10668/27101 LA en DS RISalud RD Apr 10, 2025