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dos Reis MA, Gadelha A, Felício AC, Hoexter MQ, Batista IR, Braga-Neto P, Calzavara M, Cavagnolli DA, Higuchi C, Leite MFL, Nogueira SA, Wagner J, Castiglioni MLV, Shih MC, Bressan RA. Evaluation of dopamine transporter density in healthy Brazilians using Tc-99m TRODAT-1 SPECT. Medicine (Baltimore) 2021; 100:e27192. [PMID: 34596116 PMCID: PMC8483821 DOI: 10.1097/md.0000000000027192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 08/22/2021] [Indexed: 01/05/2023] Open
Abstract
The presynaptic dopamine transporter (DAT) modulates the uptake of dopamine by regulating its concentration in the central nervous system. We aimed to evaluate the DAT binding potential (DAT-BP) in a sample of healthy Brazilians through technetium-99 metastable TRODAT-1 single-photon emission computed tomography imaging.We selected 126 healthy individuals comprising 72 men and 54 women, aged 18 to 80 years. We conducted semi-quantitative evaluation in transaxial slices, following which we identified the regions of interest in the striatal region using the occipital lobe as a region of non-specific DAT-BP.We found a decrease in DAT-BP in healthy individuals aged over 30 years, culminating in a 42% mean reduction after 80 years. There was no difference in the decrease by age group between the right (linear regression test [R2] linear = 0.466) and left striatum (R2 linear = 0.510). Women presented a higher DAT-BP than men (women: R2 linear = 0.431; men: R2 linear = 0.457); nonetheless, their decrease by age group was equal to that in men.Our study sheds light on important DAT-BP findings in healthy Brazilian subjects. Our results will facilitate understanding of brain illnesses that involve the dopamine system, such as neuropsychiatric disorders.
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Affiliation(s)
- Marilia Alves dos Reis
- Laboratory of Integrative Neuroscience, Universidade Federal de São Paulo (LiNC- EPM/UNIFESP), São Paulo, Brazil
- Department of Psychiatry, Universidade Federal de São Paulo, São Paulo, Brazil
- Department of Diagnostic Imaging, Universidade Federal de São Paulo (DDI/UNIFESP), São Paulo, Brazil
| | - Ary Gadelha
- Laboratory of Integrative Neuroscience, Universidade Federal de São Paulo (LiNC- EPM/UNIFESP), São Paulo, Brazil
- Department of Psychiatry, Universidade Federal de São Paulo, São Paulo, Brazil
- Schizophrenia Program of the Department of Psychiatry, Universidade Federal de São Paulo (PROESQ – EPM/UNIFESP), São Paulo, Brazil
| | | | | | - Ilza Rosa Batista
- Department of Diagnostic Imaging, Universidade Federal de São Paulo (DDI/UNIFESP), São Paulo, Brazil
| | - Pedro Braga-Neto
- Neurology Division, Department of Clinical Medicine, Universidade Federal do Ceará, Ceará, Brazil
- Center of Health Sciences, Universidade Estadual do Ceará, Ceará, Brazil
| | - Mariana Calzavara
- Department of Psychiatry, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | - Cinthia Higuchi
- Laboratory of Integrative Neuroscience, Universidade Federal de São Paulo (LiNC- EPM/UNIFESP), São Paulo, Brazil
- Department of Psychiatry, Universidade Federal de São Paulo, São Paulo, Brazil
- Schizophrenia Program of the Department of Psychiatry, Universidade Federal de São Paulo (PROESQ – EPM/UNIFESP), São Paulo, Brazil
| | | | | | - Jairo Wagner
- Hospital Israelita Albert Einstein, São Paulo, Brazil
| | | | - Ming Chi Shih
- Department of Psychiatry, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Rodrigo Affonseca Bressan
- Laboratory of Integrative Neuroscience, Universidade Federal de São Paulo (LiNC- EPM/UNIFESP), São Paulo, Brazil
- Department of Psychiatry, Universidade Federal de São Paulo, São Paulo, Brazil
- Schizophrenia Program of the Department of Psychiatry, Universidade Federal de São Paulo (PROESQ – EPM/UNIFESP), São Paulo, Brazil
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