Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

Spinal muscular atrophy is an autosomal recessive disease of motor neurone degeneration which shows a variable phenotype. Two candidate genes show deletions in affected subjects but with no distinction between different forms of the disease. We report an unusual family in which mild and severe SMA coexists and patients are deleted for the SMN gene. The father is affected with late onset SMA; therefore this family shows pseudodominant inheritance. When typed using closely linked flanking markers the severely affected son does not share the same haplotype as his sib, who is deleted for SMN but shows no signs yet of SMA. This supports the hypothesis that differences in SMA phenotype can be explained by a multiple allele model.

Original publication

DOI

10.1136/jmg.33.12.1019

Type

Journal article

Journal

J Med Genet

Publication Date

12/1996

Volume

33

Pages

1019 - 1021

Keywords

Adult, Child, Cyclic AMP Response Element-Binding Protein, Female, Genes, Recessive, Heterozygote, Humans, Male, Muscular Atrophy, Spinal, Nerve Tissue Proteins, Neuronal Apoptosis-Inhibitory Protein, RNA-Binding Proteins, SMN Complex Proteins, Sequence Deletion, Spinal Muscular Atrophies of Childhood