A novel de novo variant of LAMA2 contributes to merosin deficient congenital muscular dystrophy type 1A: Case report
Merosin deficient congenital muscular dystrophy type 1A (MDC1A) is caused by defects in the gene. Patients with MDC1A exhibit severe symptoms, including congenital hypotonia, delayed motor development and contractures. The present case report describes a Vietnamese male child with clinical manifesta...
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Published in | Biomedical reports Vol. 12; no. 2; pp. 46 - 50 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
England
Spandidos Publications
01.02.2020
Spandidos Publications UK Ltd D.A. Spandidos |
Subjects | |
Online Access | Get full text |
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Summary: | Merosin deficient congenital muscular dystrophy type 1A (MDC1A) is caused by defects in the
gene. Patients with MDC1A exhibit severe symptoms, including congenital hypotonia, delayed motor development and contractures. The present case report describes a Vietnamese male child with clinical manifestations of delayed motor development, limb-girdle muscular dystrophy, severe scoliosis and white matter abnormality in the brain. Whole exome sequencing (WES) was performed with subsequent validation using Sanger sequencing, and a
missense variant (NM_000426.3:c.1964T>C, p.Leu655Pro) and a splice site variant (NG_008678.1:c.3556-13T>A) in the
gene of the proband was detected. The missense variant located in exon 14 and has not been reported previously, to the best of our knowledge; whereas the splice site variant has been previously reported to cause premature termination of transcription in patients with MDC1A. In silico tools predicted that the missense variant was damaging. Phenotype-genotype analysis suggested that this proband was associated with classical early onset MDC1A. The co-existence of a
and a heterozygous variant in the
gene suggested that the
variant contributed to the autosomal recessive manner of the disease. Careful consideration of this event by clinical confirmation of parental carrier status may help to accurately determine the risk of occurrence of this disease in future offspring. Additionally, WES is recommended as a powerful tool to assist in identifying potentially causative variants for heterogeneous diseases such as MDC1A. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2049-9434 2049-9442 |
DOI: | 10.3892/br.2019.1260 |