Quick genetic screening using targeted next-generation sequencing in patients with tuberous sclerosis

Area of Science:

• Genetics
• Molecular Biology
• Medical Genetics

Background:

• Tuberous sclerosis complex (TSC) is an autosomal dominant disorder.
• Hamartomas develop in multiple organ systems in individuals with TSC.
• Mutations in TSC1 and TSC2 genes are linked to TSC.

Observation:

• Targeted next-generation sequencing (NGS) was employed for genetic analysis.
• NGS proved to be more cost-effective, labor-saving, and time-efficient than Sanger sequencing.
• Two de novo and one recurrent mutation in the TSC2 gene were identified.

Findings:

• Two novel TSC2 mutations, c.245G>A(p.W82X) and c.5405_5408dupACTT(p.P1803Lfs*25), were discovered.
• The clinical details and underlying mechanisms of these mutations were analyzed.
• The study expanded the known spectrum of TSC mutations.

Implications:

• Targeted NGS offers a superior alternative to Sanger sequencing for TSC genetic analysis.
• This approach can enhance genetic counseling for tuberous sclerosis complex.
• The findings contribute to understanding TSC mutational heterogeneity.