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Dos Santos-Lopes SS, de Oliveira JMF, de Queiroga Nascimento D, Montenegro YHA, Leistner-Segal S, Brusius-Facchin AC, Eufrazino Gondim C, Giugliani R, de Medeiros PFV. Demographic, clinical, and ancestry characterization of a large cluster of mucopolysaccharidosis IV A in the Brazilian Northeast region. Am J Med Genet A 2021; 185:2929-2940. [PMID: 34076347 DOI: 10.1002/ajmg.a.62375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 05/04/2021] [Accepted: 05/13/2021] [Indexed: 11/08/2022]
Abstract
Mucopolysaccharidosis (MPS) IVA is a rare autosomal recessive disease with a highly variable distribution worldwide. Discrepancies in the incidence of MPS IVA among populations of different ethnicities are mostly attributed to founder effects. Demographic and clinical data from 28 MPS IVA patients, followed at a single center, and ancestry (Y chromosome and mitochondrial markers) of a subsample of 17 patients, most with the p.Ser341Arg (c.1023C>G) mutation were analyzed. Parental consanguinity was observed in 15/20 couples; a rare homozygous N-acetylgalactosamine-6-sulfatase (GALNS) mutation was found in 7/16 families with intra-familial phenotypic heterogeneity. Paternal ancestry was 94.2% (16/17) European, 5.8% (1/17) African, and 0% Amerindian. The European paternal haplogroups R1a, R1b, and R* accounted for 94.2% (16/17) of the patients. The R1b haplogroup, identified in 59% (10/17) of the patients, is frequently found in populations from the Iberian Peninsula. European, Amerindian, and African maternal ancestry was observed in 46.9% (8/17), 35.4% (6/17), and 17.7% (3/17) of the patients, respectively. Study of a cluster of MPS IVA patients from Northeastern Brazil, with high parental consanguinity and phenotypic heterogeneity showed predominantly European parental ancestry. This ancestry finding corroborates historical data on the local settlement, formed predominantly by European men.
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Affiliation(s)
| | | | | | | | - Sandra Leistner-Segal
- National Institute of Populational Medical Genetics-INAGEMP, Porto Alegre, Rio Grande do Sul, Brazil.,Medical Genetics Service, Hospital de Clinicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | - Ana Carolina Brusius-Facchin
- National Institute of Populational Medical Genetics-INAGEMP, Porto Alegre, Rio Grande do Sul, Brazil.,Medical Genetics Service, Hospital de Clinicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | - Cátia Eufrazino Gondim
- Alcides Carneiro University Hospital - HUAC, Federal University of Campina Grande, Campina Grande, Paraiba, Brazil
| | - Roberto Giugliani
- National Institute of Populational Medical Genetics-INAGEMP, Porto Alegre, Rio Grande do Sul, Brazil.,Medical Genetics Service, Hospital de Clinicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil.,Department of Genetics, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
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