[Two novel TSC2 frameshift mutations in tuberous sclerosis complex].

Area of Science:

• Genetics
• Molecular Biology
• Medical Research

Background:

• Tuberous sclerosis complex (TSC) is a genetic disorder caused by mutations in TSC1 or TSC2 genes.
• Identifying specific mutations is crucial for understanding disease mechanisms and genetic counseling.

Purpose of the Study:

• To identify and characterize mutations in the TSC1 and TSC2 genes in families with TSC.
• To investigate the inheritance patterns of identified mutations within families.

Main Methods:

• High-throughput sequencing of peripheral blood DNA from TSC patients and family members.
• Polymerase chain reaction (PCR) and Sanger sequencing for mutation verification.
• Analysis of mutation effects on protein coding sequences.

Main Results:

• Two novel heterozygous frameshift mutations in the TSC2 gene were identified in two TSC probands: c.3981-3982 insA and c.4013-4014 delCA.
• The c.3981-3982 insA mutation was found in proband 1, with no affected parents. The c.4013-4014 delCA mutation was found in proband 2, with the mother being a carrier.
• Both mutations are predicted to cause premature termination of the TSC2 protein.

Conclusions:

• The identified frameshift mutations in the TSC2 gene are likely pathogenic for TSC in these families.
• Further studies using cell and animal models are necessary to confirm the pathogenicity and functional impact of these novel mutations.