the barthel laboratory

The Barthel Laboratory studies how telomere dysfunction drives structural genome evolution and shapes the molecular trajectory of cancer. Based at TGen in Phoenix, Arizona, we combine cytogenetics and molecular biology with long-read sequencing, chromatin and 3D-genome assays, and computational genomics. Two methods we developed in-house anchor the work: Telomere-C for mapping the telomeric chromatin interactome, and KaryoScope for k-mer-based, alignment-free genome annotation. Together these resolve repetitive and structurally complex regions of the genome that conventional pipelines miss. We work primarily on diffuse glioma and other solid tumors, with a clinical interest in monitoring therapy response through circulating tumor DNA.

Read more about our research.

Floris gave a seminar at the François Jacob Institute of Biology (CEA) in Fontenay-aux-Roses, hosted by Stéphane Marcand and joined by Zhou Xu of Sorbonne Université.
Posted 21 Sep 2026
Floris gave an invited talk at the International Workshop on Chromosomal Instability in Segovia, Spain.
Posted 16 Sep 2026
Floris gave a talk at the Telomere-to-Telomere (T2T) Face-to-Face meeting at UC Santa Cruz.
Posted 03 Sep 2026
Floris gave an invited talk at Cancer Center Amsterdam, hosted by Myron Best.
Posted 31 Jul 2026
Excited to share a big KaryoScope update this past week: the HKS k-mer backend is now integrated, and you can build databases for any features of i...
Posted 28 Jul 2026
Telomere crisis is an engine of genomic instability, driving the structural evolution of cancer genomes. Our new preprint finds this damage isn’t r...
Posted 22 May 2026
The human genome’s most variable and clinically important regions (centromeres, telomeres, and acrocentric short arms) have been the hardest to stu...
Posted 17 May 2026
Excited to contribute to a new preprint led by Justin Zook and the NIST/GIAB team: “A complete human pancreatic cancer genome”, the first near-comp...
Posted 08 May 2026