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Assessment of Tuberous Sclerosis Complex Associated With Renal Lesions by Targeted Next-generation Sequencing in Mainland China.

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OBJECTIVE To identify the TSC1 and TSC2 mutations in patients with tuberous sclerosis complex (TSC) associated with renal lesions, and to explore the relationship between genotypes and phenotypes. MATERIALS AND… Click to show full abstract

OBJECTIVE To identify the TSC1 and TSC2 mutations in patients with tuberous sclerosis complex (TSC) associated with renal lesions, and to explore the relationship between genotypes and phenotypes. MATERIALS AND METHODS We analyzed 43 individuals affected with TSC accompanied by renal lesions using next-generation sequencing (NGS). We also performed Sanger sequencing to validate the NGS results. RESULTS We reported a comprehensive mutation analysis of 43 affected individuals with TSC accompanied by renal lesions using NGS. Forty-one of 43 patients (95%) had at least 1 detectable mutation in the TSC1 or TSC2 gene. We identified 14 novel nucleotide alterations, including 11 novel small mutations and 3 large-deletion mutations for the first time. Our study showed that patients with TSC2 mutations had higher frequency of hypomelanotic macules and dental enamel pits and larger angiomyolipomas (AMLs) than patient populations with non-TSC2 mutations through analysis of the correlated mutation findings with clinical features. CONCLUSION In conclusion, patients with TSC2 mutations had higher frequency of hypomelanotic macules and dental enamel pits, along with larger renal AMLs, compared with patient populations with non-TSC2 mutations. Patients with large deletions and frameshift mutations of the TSC1 or TSC2 gene showed larger AML diameters than patients with other kinds of mutations.

Keywords: associated renal; tuberous sclerosis; renal lesions; sclerosis complex; tsc2 mutations; next generation

Journal Title: Urology
Year Published: 2017

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