A Comprehensive Overview of NF1 Mutations in Iranian Patients

Area of Science:

• Genetics
• Molecular Biology
• Medical Genetics

Background:

• Neurofibromatosis type 1 (NF1) is a prevalent genetic disorder.
• It is characterized by high phenotypic variability and nearly complete penetrance.
• Genetic mutations in the NF1 gene are the underlying cause.

Purpose of the Study:

• To identify NF1 gene mutations in Iranian patients.
• To expand the spectrum of known NF1 variants.
• To aid genetic counseling for affected families.

Main Methods:

• Whole-exome sequencing was employed.
• Analysis was performed on 32 NF1 cases from 22 Iranian families.
• Detected variants were classified as inherited or sporadic.

Main Results:

• A total of 31 variants were identified, comprising 30 point mutations and one large deletion.
• Seven novel NF1 variants were discovered: c.5576 T>G, c.6658_6659insC, c.2322dupT, c.92_93insAA, c.4360C>T, c.3814C>T, and c.4565_4566delinsC.
• This represents the largest cohort of Iranian NF1 cases with identified mutations.

Conclusions:

• The study successfully identified a significant number of NF1 mutations in the Iranian population.
• The discovery of novel variants broadens the mutational landscape of NF1.
• These findings are crucial for improving genetic diagnosis and counseling for NF1 patients in Iran.