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E Marcondes AA, Gomez TGB, Ravache TT, Batistuzzo A, Lorena FB, de Paula CS, Lowenthal R, Bianco AC, Ribeiro MO. Assessment of children in the autistic spectrum disorder that carry the Thr92Ala-DIO2 polymorphism. J Endocrinol Invest 2021; 44:1775-1782. [PMID: 33449341 PMCID: PMC8693502 DOI: 10.1007/s40618-020-01497-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 12/31/2020] [Indexed: 12/18/2022]
Abstract
INTRODUCTION A polymorphism in the type 2 deiodinase (Thr92Ala-DIO2) gene has been associated with behavioral and cognitive dysfunction as well as neurodegeneration and oxidative stress in the central nervous system. OBJECTIVE To test whether the minor allele (Ala92) frequency (MAF) is increased in children in the autism spectrum disorder (ASD), and whether carriers of the minor allele exhibit more severe symptoms and/or worse adaptive behavior. STUDY DESIGN ASD children were evaluated at baseline and yearly throughout the study by psychologists using the following tools: autism behavior checklist, Vineland Adaptative Behaviour Scales II, non-verbal intelligence test SON-R 21/2-7, SON-R 6-40, Weschler scale for intelligence, and autism treatment evaluation checklist. SETTINGS Academic outpatient mental health facility in Sao Paulo, Brazil. PARTICIPANTS ASD boys and girls younger than 18 years of age. 132 consecutive ASD children, mostly boys (~ 80%); ~ 50% was classified as verbal. Exclusion criteria were coexistence of sensory and/or physical impairment, or any associated genetic syndromes. RESULTS Median follow-up was for an uninterrupted period of 937 days (139-1375 days), which did not vary significantly among the genotypes. The MAF was 47% in ASD patients vs. 51% in a local reference population with similar ethnic background; the clinical severity and progression were not affected by the minor allele. Carriers of the minor allele exhibited higher adaptive behavior in the domains "daily living skills" and "communication", which correlated positively with the dose of the minor allele. CONCLUSION The MAF is not different in ASD children, but carriers of the Thr92Ala-DIO2 polymorphism exhibited higher adaptive behavior.
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Affiliation(s)
- A A E Marcondes
- Developmental Disorders Program, CCBS, Center of Biological Science and Health, Mackenzie Presbyterian University, Rua da Consolação, 930 Bld. #28, São Paulo, SP, 01302-907, Brazil
| | - T G B Gomez
- Developmental Disorders Program, CCBS, Center of Biological Science and Health, Mackenzie Presbyterian University, Rua da Consolação, 930 Bld. #28, São Paulo, SP, 01302-907, Brazil
| | - T T Ravache
- Developmental Disorders Program, CCBS, Center of Biological Science and Health, Mackenzie Presbyterian University, Rua da Consolação, 930 Bld. #28, São Paulo, SP, 01302-907, Brazil
| | - A Batistuzzo
- Developmental Disorders Program, CCBS, Center of Biological Science and Health, Mackenzie Presbyterian University, Rua da Consolação, 930 Bld. #28, São Paulo, SP, 01302-907, Brazil
| | - F B Lorena
- Developmental Disorders Program, CCBS, Center of Biological Science and Health, Mackenzie Presbyterian University, Rua da Consolação, 930 Bld. #28, São Paulo, SP, 01302-907, Brazil
- Federal University of Sao Paulo, São Paulo, Brazil
| | - C S de Paula
- Developmental Disorders Program, CCBS, Center of Biological Science and Health, Mackenzie Presbyterian University, Rua da Consolação, 930 Bld. #28, São Paulo, SP, 01302-907, Brazil
| | - R Lowenthal
- Santa Casa de São Paulo School of Medical Sciences, São Paulo, Brazil
| | - A C Bianco
- Section of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Chicago, Chicago, IL, USA
| | - M O Ribeiro
- Developmental Disorders Program, CCBS, Center of Biological Science and Health, Mackenzie Presbyterian University, Rua da Consolação, 930 Bld. #28, São Paulo, SP, 01302-907, Brazil.
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