Variability of systemic and oro-dental phenotype in two families with non-lethal Raine syndrome with FAM20C mutations
| Autor: | Acevedo, Ana Carolina, Poulter, James A, Alves, Priscila Gomes, de Lima, Caroline Lourenço, Castro, Luiz Claudio, Yamaguti, Paulo Marcio, Paula, Lilian M, Parry, David A, Logan, Clare V, Smith, Claire E L, Johnson, Colin A, Inglehearn, Chris F, Mighell, Alan J |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Male
Bone mineralization Adolescent Young Adult Ectopic mineralisation stomatognathic system Amelogenesis imperfecta Genetics Exophthalmos Humans Genetics(clinical) Abnormalities Multiple Raine syndrome Child FAM20C Extracellular Matrix Proteins Base Sequence Casein Kinase I Tooth Abnormalities Dentine Pedigree Cleft Palate stomatognathic diseases Phenotype Child Preschool Mutation Microcephaly Female Mouth Abnormalities Osteosclerosis Research Article |
| Zdroj: | Acevedo, A C, Poulter, J A, Alves, P G, de Lima, C L, Castro, L C, Yamaguti, P M, Paula, L M, Parry, D A, Logan, C V, Smith, C E L, Johnson, C A, Inglehearn, C F & Mighell, A J 2015, ' Variability of systemic and oro-dental phenotype in two families with non-lethal Raine syndrome with FAM20C mutations ', BMC Medical Genetics, vol. 16, no. 1, 8 . https://doi.org/10.1186/s12881-015-0154-5 BMC Medical Genetics |
| ISSN: | 1471-2350 |
| DOI: | 10.1186/s12881-015-0154-5 |
| Popis: | Background Raine syndrome (RS) is a rare autosomal recessive bone dysplasia typified by osteosclerosis and dysmorphic facies due to FAM20C mutations. Initially reported as lethal in infancy, survival is possible into adulthood. We describe the molecular analysis and clinical phenotypes of five individuals from two consanguineous Brazilian families with attenuated Raine Syndrome with previously unreported features. Methods The medical and dental clinical records were reviewed. Extracted deciduous and permanent teeth as well as oral soft tissues were analysed. Whole exome sequencing was undertaken and FAM20C cDNA sequenced in family 1. Results Family 1 included 3 siblings with hypoplastic Amelogenesis Imperfecta (AI) (inherited abnormal dental enamel formation). Mild facial dysmorphism was noted in the absence of other obvious skeletal or growth abnormalities. A mild hypophosphataemia and soft tissue ectopic mineralization were present. A homozygous FAM20C donor splice site mutation (c.784 + 5 g > c) was identified which led to abnormal cDNA sequence. Family 2 included 2 siblings with hypoplastic AI and tooth dentine abnormalities as part of a more obvious syndrome with facial dysmorphism. There was hypophosphataemia, soft tissue ectopic mineralization, but no osteosclerosis. A homozygous missense mutation in FAM20C (c.1487C > T; p.P496L) was identified. Conclusions The clinical phenotype of non-lethal Raine Syndrome is more variable, including between affected siblings, than previously described and an adverse impact on bone growth and health may not be a prominent feature. By contrast, a profound failure of dental enamel formation leading to a distinctive hypoplastic AI in all teeth should alert clinicians to the possibility of FAM20C mutations. Electronic supplementary material The online version of this article (doi:10.1186/s12881-015-0154-5) contains supplementary material, which is available to authorized users. |
| Databáze: | OpenAIRE |
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