A Case study showing a Novel gene mutation in LAMB3 causing Junctional Epidermolysis Bullosa [Intermediate/Severe]

Abstract

ABSTRACT Background: Junctional epidermolysis bullosa (JEB) is a type of Epidermolysis Bullosa, a group of genetic conditions that cause the skin to be very fragile and to blister easily. It is categorized into Herlitz type and Non-Herlitz types. JEB is inherited in an autosomal recessive pattern and the most common genetic mutations associated are LAMB3, COL17A1, or LAMC2, and LAMA3 genes. Case presentation: This study reports a consanguineous couple, who are carriers for pathogenic variant for LAMB3 gene, with an affected child with a homozygous mutation in the LAMB3 gene causing Herlitz type of Junctional epidermolysis Bullosa/ Non-Herlitz type of junctional epidermolysis bullosa. Furthermore, prenatal diagnosis for the Gravida also showed the same pathogenic variant. Conclusion: For autosomal recessive genetic conditions, it is advisable to perform a Trio whole-exome sequencing or next-generation sequencing to detect the genes associated with the disease. Depending on the type of variants involved prenatal diagnosis for the next pregnancy and treatment or management (if available) options can be offered/discussed.