Postdoctoral Associate

Deploys next-generation sequencing techniques to understand brain tumor biology and telomere mechanics

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About Floris Barthel, M.D.

Dr. Barthel received his M.D. degree from the Vrije Universiteit Amsterdam prior to joining the MD Anderson Cancer Center in Houston to pursue a postdoctoral position in glioma genomics. He research is focused on transcriptional and epigenetic profiling of gliomas and in understanding the genomic basis of telomere maintenance in cancer.

Education and Experience

2016-present: Postdoctoral Associate. The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut.

2014-2016: Senior Research Assistant. MD Anderson Cancer Center, Houston, Texas.

2007-2014: M.D., Medicine. Vrije Universiteit Amsterdam, The Netherlands.

Selected Publications

Highlighted Abstract

Cancer cells survive cellular crisis through telomere maintenance mechanisms. We report telomere lengths in 18,430 samples, including tumors and non-neoplastic samples, across 31 cancer types. Telomeres were shorter in tumors than in normal tissues and longer in sarcomas and gliomas than in other cancers. Among 6,835 cancers, 73% expressed telomerase reverse transcriptase (TERT), which was associated with TERT point mutations, rearrangements, DNA amplifications and transcript fusions and predictive of telomerase activity. TERT promoter methylation provided an additional deregulatory TERT expression mechanism. Five percent of cases, characterized by undetectable TERT expression and alterations in ATRX or DAXX, demonstrated elongated telomeres and increased telomeric repeat-containing RNA (TERRA). The remaining 22% of tumors neither expressed TERT nor harbored alterations in ATRX or DAXX. In this group, telomere length positively correlated with TP53 and RB1 mutations. Our analysis integrates TERT abnormalities, telomerase activity and genomic alterations with telomere length in cancer.

View full list of publications

Search MagazineMarch 19, 2019
Making a difference for rural cancer patients
Dr. Jens Rueter and the Maine Cancer Genomics Initiative are providing advanced genomic tools to oncology practices throughout Maine.
Research HighlightMarch 08, 2019
Long-range connectivity and gene regulation networks
A complicated three-dimensional network involving proteins and specific DNA sequences helps regulate the expression of genes. New work led by JAX’s Chia-Lin Wei shows how one protein, SOX2, plays a significant role in neural stem cells, affecting many aspects of development and function.
Search MagazineMarch 06, 2019
From tragedy, hope and closure
Doctors who treat rare pediatric cancers face an awful truth: many of their patients will die far too young.
- Cancer/Tumors
- Cancer
Press ReleaseMarch 05, 2019
3D genomics one nucleus at a time
Supported by a recent four-year, $2.3M grant from the National Institute of General Medical Sciences, Wei is looking to develop a method for chromatin interaction analysis in single nuclei, with single-molecule resolution.
- Genetic Tools
- Genetics and Genomics

Research HighlightMarch 12, 2019
A closer look at structural variants in the genome
A recent Cell paper uses long-read DNA sequencing and other advanced genomics tools and methods to shed light on genomic structural variants.
Research HighlightMarch 08, 2019
Breaking up is hard to do
New research shows that proteins work together to enable DNA double-strand breaks during meiosis.
- Reproductive Biology
- Genetics and Genomics
Search MagazineMarch 06, 2019
Finding a better way to fight childhood cancers
Ching Lau is working to find effective therapies and test them against patients’ own tumors in specially made patient derived xenotype (PDX) mice.
Research HighlightFebruary 28, 2019
Two proteins essential for layered sterocilia elongation in the inner-ear
A research team led by Basile Tarchini has found two new proteins that are essential to the correct elongation of stereocilia, tiny hair-like cellular protrusions in the inner ear.