SEARCH · PubMed Health

Results for “Tuberous sclerosis complex”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

4 recordsLinked to original sources

PubMed2025

TSC angiofibroma and ungual fibroma have different mutation signatures, with recurrent mutations in KMT2C.

PURPOSE: Tuberous sclerosis complex (TSC) is an autosomal dominant tumor suppressor syndrome characterized by tumors affecting multiple tissues, including skin, due to inactivating TSC1/TSC2 variants. Genome-wide profiling of somatic mutations in a unique collection of angiofibroma (FAF) and ungual fibroma (UF) TSC skin tumors was performed. METHODS: Genome sequencing was performed on 9 samples, comprising 4 FAF and 5 UF, along with 6 matched normal samples from 6 individuals with TSC. RESULTS: TSC-FAF and TSC-UF skin tumors have different mutation signatures, with a predominance of UV-related single-nucleotide variant (SNV; SBS7a and SBS7b) and dinucleotide variant (DNV; DBS1) signatures in FAF, and aging-related SNV (SBS1 and SBS5) signatures in UF. We also identified a novel DNV signature for TSC-UF, with frequent TG>CA and TT>GG substitutions. Furthermore, 3 inactivating somatic mutations in KMT2C were observed in 2 of 4 TSC-FAF and 5 mutations in other cancer genes. CONCLUSION: The distinct SNV mutation signatures seen in TSC-FAF and UF indicate that they develop through distinct pathogenic mechanisms, UV-induced mutagenesis in FAF, and aging-related mutagenesis in UF. The mechanism of the novel DNV signature in UFs merits further investigation. Our observation on the occurrence of KMT2C mutations suggests that KMT2C inactivation contributes to the pathogenesis of TSC-FAF.

Humans↗

PubMed2026

Pancreatic neuroendocrine tumors in patients with tuberous sclerosis: a multicenter study and systematic review.

INTRODUCTION: Pancreatic neuroendocrine tumors (pNETs) are a recognized feature of tuberous sclerosis complex (TSC). The current evidence suggests that pNETs occurring in TSC may exhibit a different clinical course from sporadic cases, but their natural history remains poorly characterized. OBJECTIVE: This study aimed to characterize the demographics, clinical presentation, management, and long-term outcomes of TSC-associated-pNETs and to propose possible guidelines for surveillance and management. MATERIALS AND METHODS: We conducted a multicenter retrospective review of TSC-pNET patients from 6 UK TSC specialist clinics and from 3 NET referral centers, from 2008 to 2024. Data on demographics, tumor characteristics, management, and outcomes, were collected. A systematic review of the literature from 2009 to 2026 on TSC-pNETs was also performed. RESULTS: We identified a total of 26 consecutive cases with the TSC-pNET-association in our cohort: 21 cases of pNETs from TSC specialist clinics (1.1% of the population), and 5 cases of TSC-pNETs from the NET referral centers (0.25% of the population). An additional 80 cases were identified from the published literature. We observed a wide spectrum of clinical phenotypes, with the majority being nonfunctioning pNETs (n = 24; 92%), whereas 2 patients were diagnosed with glucagonomas. Surgical intervention was the mainstay initial treatment, the indication being either functional pNETs, or large or symptomatic nonfunctioning pNETs. CONCLUSION: TSC-pNETs are rare and mostly nonfunctioning tumors with variable clinical behavior. Due to their uncertain malignant potential, we suggest that baseline pancreatic imaging should be incorporated into TSC surveillance, and we emphasize the need for heightened pNET surveillance and updated management recommendations.

TS complex↗

PubMed2026

Long-term seizure outcomes and factors associated with response to adjunctive everolimus in TSC-associated epilepsy.

BACKGROUND: Everolimus, a mechanistic target of rapamycin (mTOR) inhibitor, is increasingly used in tuberous sclerosis complex (TSC)-associated epilepsy; however, long-term real-world outcomes and factors associated with favorable response remain unclear. This study aimed to evaluate the long-term seizure outcomes of adjunctive everolimus and explore clinical factors associated with treatment response. METHODS: We retrospectively recruited 21 patients with active TSC-associated epilepsy receiving adjunctive everolimus and assessed seizure outcomes during follow-up. Clinical characteristics were compared between responders and non-responders at 1 year after treatment initiation. RESULTS: Over a median treatment duration of 72 months, responder rates ranged from 53.8% to 64.7%, and seizure-free rates ranged from 33.3% to 41.2%. Responders had fewer involved organ systems at baseline (median 3 vs. 4, p = 0.020) and lower anti-seizure medication burden (median 2 vs. 4, p = 0.045). Younger age at treatment initiation showed a trend toward improved response. CONCLUSION: Adjunctive everolimus was associated with sustained long-term seizure reduction in this real-world cohort. In exploratory analyses, fewer involved organ systems and fewer baseline ASMs were associated with favorable treatment response. These findings require validation in larger prospective cohorts.

Epilepsy↗

PubMed2026

Development of a human iPSC and patient phenotyping resource for preclinical investigations of neurodevelopmental disorders.

In this manuscript, we report the development of a comprehensive resource designed to harness the transformative potential of patient-derived induced pluripotent stem cells (iPSCs) to advance the study of neurodevelopmental disorders (NDDs). Using CRISPR-Cas-mediated genome editing, the Human Neuron Core generated a repository comprising 29 isogenic iPSC pairs, two sex-matched parental control iPSC pairs, and one unmatched patient line representing six monogenic NDDs: Tuberous Sclerosis Complex, PTEN Hamartoma Tumor Syndrome, KCNQ2 Developmental and Epileptic Encephalopathy, FOXG1 Syndrome, Phelan-McDermid Syndrome, and SETBP1 Haploinsufficiency Disorder. In parallel, detailed clinical phenotyping data were collected to enable comparison of cellular phenotypes with clinical severity in future studies. This integrated collection of genetically defined iPSC lines and associated clinical data provides a powerful platform for investigating disease mechanisms and advancing iPSC-based drug discovery for NDDs.

Humans↗