Project description:We used NGS on a cohort of complex genetics sarcomas to study their transcriptomes (RNA-seq technology), looking for recurrent and specific gene fusions. We identified multiple TRIO fusions with different partners in our cohort. No TRIO fusions were reported in negative-control cells (normal tissues) and in simple genetics sarcomas.
Project description:DNA methylation profiling has emerged as a valuable tool for tumor classification, exemplified by the German Cancer Research Center's creation of online classifiers for CNS tumors and sarcomas. Identification of rare molecular events, such as TRIO::TERT fusion in undifferentiated sarcomas, through DNA methylation profiling and transcriptome analysis aims to define distinct molecular subgroups within sarcomas of uncertain diagnosis, potentially improving classification and treatment strategies.In this study, we present 8 cases of sarcomas characterized by TRIO::TERT fusion, establishing it as a distinct molecular subtype of sarcomas. This fusion represents a consistent molecular feature across all analyzed tumors, suggesting its pivotal role in sarcomatogenesis. Identifying TRIO::TERT transcript sarcoma as a new tumor type may enhance diagnostic strategies for improved patient management.
Project description:Function-damaging variants in the TRIO gene are enriched in individuals with neurodevelopmental disorders (NDDs). TRIO encodes a cytoskeletal regulatory protein with three catalytic domains – two guanine exchange factor (GEF) domains, GEF1 and GEF2, and a kinase domain, as well as several accessory domains that have not been extensively studied. Disease variants in the GEF1 domain or the nine adjacent spectrin repeats (SRs) are enriched in NDDs, suggesting that dysregulated GEF1 activity is linked to these disorders. We provide evidence here that the Trio SRs interact intramolecularly with the GEF1 domain to inhibit its activity. We demonstrate that SRs 6-9 decrease GEF1 catalytic activity both in vitro and in cells and show that NDD-associated variants in the SR8 and GEF1 domains relieve this autoinhibitory constraint. Our results from chemical cross-linking and BioLayer Interferometry indicate that the SRs primarily contact the PH region of the GEF1 domain, reducing GEF1 binding to Rac1. Together, our findings reveal a key regulatory mechanism that is commonly disrupted in multiple NDDs and may offer a new target for therapeutic intervention for TRIO-associated NDDs.
Project description:Interventions: A patient is vaccinated with Montanide ISA51-adjuvanted WT1 Trio cancer vaccine consisting of two WT1 CTL peptides (WT1-126 and WT1-235) and one WT1 HTL peptide (WT1-332) (2mg each) seven times at the interval of two weeks.
Primary outcome(s): Induction of WT1-specific immune responses assessed by WT1-related tests such as WT1-DTH skin reaction and serum levels of WT1 peptide IgG autoantibody at 1M, 2M, and 3M of WT1 Trio vaccine.
Study Design: Single arm Non-randomized