Genetic basis of dominantly inherited transient bullous dermolysis of the newborn: a splice site mutation in the type VII collagen gene.

Abstract

Transient bullous dermolysis of the newborn (TBDN) is a blistering disease evident at birth or shortly thereafter, but the blistering tendency decreases with advancing age. The tissue separation in TBDN is below the lamina densa, and electron microscopy has revealed abnormalities in anchoring fibrils. Immunofluorescence staining demonstrates intracellular accumulation of type VII collagen. In this study, we report a G-to-C transversion mutation in the last nucleotide of intron 35 of the type VII collagen gene (COL7A1) in a family with autosomal dominant TBDN in three generations. This nucleotide substitution abolishes the obligatory consensus 3'-acceptor splice site, predicting in-frame skipping of exon 36. Thus, TBDN in this family is caused by a mutation in COL7A1, and is therefore allelic with other variants of dominant dystrophic epidermolysis bullosa.

• Authors: A M Christiano, J D Fine, J Uitto
• Journal: The Journal of investigative dermatology (J Invest Dermatol) Vol. 109 Issue 6 Pg. 811-4 (Dec 1997) ISSN: 0022-202X [Print] United States
• PMID: 9406826 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, P.H.S.)

Chemical References

• Collagen

Topics

• Child, Preschool
• Collagen (genetics)
• Epidermolysis Bullosa (genetics)
• Fluorescent Antibody Technique, Indirect
• Humans
• Male
• Mutation