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Fussiger H, Pereira BLDS, Padilha JPD, Donis KC, Siebert M, Brusius-Facchin AC, Baldo G, Saute JAM, Chen K, Virmond LA, Silva MFB, Minillo RM, Almeida TF, Pelegrino KO, Ferreira AFM, Colichio GBC, Oliveira APA, Teixeira ACB, Carlos CD, da Matta MC, Lima MM, Yamada RY, Cintra VP, Campilongo GP, Camargo SK, Oliveira TFG, Coelho AVC, de Albuquerque RS, de Souza EA, Júnior MAP, Caraciolo MP, Cervato MC, Gomes CS, Moura LMS, Guedes RLM, Barreiro RAS, Reis RS, Val FC, Oliveira JB, Siebert M, Brusius‐Facchin AC, Baldo G, Saute JAM. Copy number variations in SPAST and ATL1 are rare among Brazilians. Clin Genet 2022; 103:580-584. [PMID: 36537231 DOI: 10.1111/cge.14280] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/08/2022] [Accepted: 12/10/2022] [Indexed: 12/24/2022]
Abstract
Copy number variations (CNV) may represent a significant proportion of SPG4 and SPG3A diagnosis, the most frequent autosomal dominant subtypes of hereditary spastic paraplegias (HSP). We aimed to assess the frequency of CNVs in SPAST and ATL1 and to update the molecular epidemiology of HSP families in southern Brazil. A cohort study that included 95 Brazilian index cases with clinical suspicion of HSP was conducted between April 2011 and September 2022. Multiplex Ligation Dependent Probe Amplification (MLPA) was performed in 41 cases without defined diagnosis by different massive parallel sequencing techniques (MPS). Diagnosis was obtained in 57/95 (60%) index cases, 15/57 (26.3%) being SPG4. Most frequent autosomal recessive HSP subtypes were SPG7 followed by SPG11, SPG76 and cerebrotendinous xanthomatosis. No CNVs in SPAST and ATL1 were found. Copy number variations are rare among SPG4 and SPG3A families in Brazil. Considering the possibility of CNVs detection by specific algorithms with MPS data, we consider that this is likely the most cost-effective approach to investigate CNVs in these genes in low-risk populations, with MLPA being reserved as an orthogonal confirmatory test.
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Affiliation(s)
- Helena Fussiger
- Graduate Program in Medicine: Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Janice Pacheco Dias Padilha
- Graduate Program in Medicine: Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Karina Carvalho Donis
- Medical Genetics Service, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil
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- Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Marina Siebert
- Laboratory Research Unit, Experimental Research Center, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil
| | | | - Guilherme Baldo
- Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Jonas Alex Morales Saute
- Graduate Program in Medicine: Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Medical Genetics Service, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Department of Internal Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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- Laboratory Research Unit, Experimental Research Center, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre Brazil
| | | | - Guilherme Baldo
- Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul Porto Alegre Brazil
| | - Jonas Alex Morales Saute
- Graduate Program in Medicine: Medical Sciences, Universidade Federal do Rio Grande do Sul Porto Alegre Brazil
- Medical Genetics Service, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre Brazil
- Department of Internal Medicine Universidade Federal do Rio Grande do Sul Porto Alegre Brazil
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da Silva Pereira BL, Polina ER, Crispim D, Sbruzzi RC, Canani LH, Dos Santos KG. Interleukin-10 -1082A > G (rs1800896) polymorphism is associated with diabetic retinopathy in type 2 diabetes. Diabetes Res Clin Pract 2018; 138:187-192. [PMID: 29382585 DOI: 10.1016/j.diabres.2018.01.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 11/12/2017] [Accepted: 01/23/2018] [Indexed: 01/23/2023]
Abstract
AIM To investigate whether the -1082A > G polymorphism (rs1800896) in the interleukin-10 (IL10) gene is associated with diabetic retinopathy (DR) in Brazilians with type 2 diabetes mellitus. METHODS This case-control study included 847 outpatients with type 2 diabetes and 145 healthy blood donors. Four hundred and two patients had no DR, 253 had non-proliferative DR (NPDR), and 192 had proliferative DR (PDR). Genotyping was done by real-time PCR. RESULTS Genotype and allele frequencies were similar in patients and blood donors. In relation to the presence and severity of DR, the AA genotype was overrepresented among patients with NPDR, whereas the GG genotype was more frequent among patients with PDR. Multiple logistic regression analysis showed that the AA genotype was independently associated with increased risk of NPDR, after controlling for duration of diabetes, body mass index, and insulin use (adjusted OR = 1.50; 95% CI = 1.04-2.17). The GG genotype, however, did not remain associated with increased risk of PDR (adjusted OR = 1.49; 95% CI = 0.78-2.86). CONCLUSIONS This study identified, for the first time, an independent association of the -1082A > G polymorphism in the IL10 gene with NPDR in type 2 diabetes. This finding provides additional evidence supporting that genetic variants of IL10 are involved in the pathogenesis of DR.
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Affiliation(s)
| | - Evelise Regina Polina
- Laboratory of Human Molecular Genetics, Universidade Luterana do Brasil (ULBRA), Canoas, Brazil
| | - Daisy Crispim
- Endocrine Division, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil
| | - Renan Cesar Sbruzzi
- Laboratory of Human Molecular Genetics, Universidade Luterana do Brasil (ULBRA), Canoas, Brazil
| | - Luis Henrique Canani
- Endocrine Division, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil
| | - Kátia Gonçalves Dos Santos
- Laboratory of Human Molecular Genetics, Universidade Luterana do Brasil (ULBRA), Canoas, Brazil; Cardiology Division, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.
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