A researcher in neuroimmunology &
systems biology
science
Profiling of brain-invading T cells in multiple sclerosis
Toxic protein congests neuronal cell bodies in inflammation
Pregnancy fosters disease-specific regulatory T cells
T cell repertoire dynamics during pregnancy in multiple sclerosis
Single nuclei sequencing of multiple sclerosis brains
Progesterone boosts regulatory T cells in pregnancy
Dendritic cell mobility depends on Arc
Genetic risk variant of CD226 impairs regulatory T cells
Regulatory T cells control SmD1-reactive T cells in lupus
Projects
science
Profiling of brain-invading T cells in multiple sclerosis
Image: Max Kaufmann
Background
In multiple sclerosis, immune cells leave the bloodstream, invade the brain and cause local inflammation. However, the phenotypic identity of these cells remains enigmatic.
findings
Single cell transcriptome and protein data identifies a pathogenic CD161+/lymphotoxin beta (LTB)+ T cell population that can be refound in brain biopsies of multiple sclerosis patients.
My contribution
Consultation on data analysis, writing.
Year
2021
Species
Human
Reference
science
Toxic protein congests neuronal cell bodies in inflammation
Image: Benjamin Schattling
Background
In multiple sclerosis, neurons are damaged by inflammation. However, their cellular responses and coping strategies are still incompletely understood.
findings
Inflammation in the nervous system triggers toxic deposition the protein Bassoon in neuronal cell bodies. Pharmacological intervention can dissolve Bassoon aggregates.
My contribution
Shared first authorship, disease model, computational analysis, data analysis, experimental design, figure design, writing.
Year
2019
Species
Mouse, Human, Fly
Reference
science
Pregnancy fosters disease-specific regulatory T cells
Image: Jan Broder Engler
background
Pregnancy suppresses the disease activity of multiple sclerosis. However, whether pregnancy directly modulates the repertoire of T cell receptors is unclear.
findings
The multiple sclerosis mouse model triggers the usage of disease-specific T cell receptors. Pregnancy boosts disease-specific regulatory T cells, which might support the suppression of disease.
My contribution
Shared first authorship, computational analysis, experimental planning, data analysis, figure design, writing.
Year
2019
Species
Mouse
Reference
science
T cell repertoire dynamics during pregnancy in multiple sclerosis
Artwork: dianelavoie.com
background
Pregnancy suppresses the disease activity of multiple sclerosis. However, the impact of pregnancy on the clonal T cells composition in multiple sclerosis patients remains unclear.
findings
Longitudinal assessment of the T cell repertoire in multiple sclerosis patients reveals clonal dynamics compatible with contraction of autoreactive T cells during pregnancy.
My contribution
Data analysis, figure design, writing.
Year
2019
Species
Human
Reference
science
Single nuclei sequencing of multiple sclerosis brains
Image: Jan Broder Engler
Background
Multiple sclerosis leads to neuronal loss and functional impairment. However, insights into human pathology at single cell resolution are hard to obtain.
findings
Single nuclei sequencing of human post mortem brains uncovers cellular stress signatures and differential vulnerability of neuronal subtypes.
My contribution
Consultation on data analysis.
Year
2019
Species
Human
Reference
science
Progesterone boosts regulatory T cells in pregnancy
Artwork: Jan Broder Engler
Background
Pregnancy conveys temporary protection from multiple sclerosis disease activity. However, the underlying mechanisms are still incompletely understood.
findings
Differential steroid resistence favors regulatory over conventional T cells in the presence of high levels of progesterone.
My contribution
First authorship, execution of experiments, experimental planning, data analysis, figure design, writing.
Year
2017
Species
Mouse
Reference
science
Dendritic cell mobility depends on Arc
Image: Joseph Tintelnot
background
Migratory dendritic cells continuously surveil their surrounding and deliver antigens to the draining lymph nodes. However, specific markers for this cell type are still missing.
findings
Migratory dendritic cells express high levels of Arc, which boosts their mobility and enables fast inflammatory migration.
My contribution
Data analysis, figure design, writing.
Year
2016
Species
Mouse
Reference
science
Genetic risk variant of CD226 impairs regulatory T cells
Image: INIMS, Hamburg
background
A genetic variant of the CD226 gene is associated with increased risk of developing multiple sclerosis. However, the mechanism by which this occurs is still unclear.
findings
The risk variant of CD226 leads to reduced CD226 surface espression and impaired regulatory T cell function.
My contribution
Animal model, Treg transfer, data analysis.
Year
2015
Species
Human, Mouse
Reference
science
Regulatory T cells control SmD1-reactive T cells in lupus
Image: Pomeranz et al, Nature 2009
background
Autoreactive T cells play an important role in systemic lupus erythematosus. However, their reliable detection remains a technical challenge.
findings
Intracellular CD154 expression can identify autoreactive T cells in the peripheral blood of systemic lupus erythematosus patients after depletion of regulatory T cells.
My contribution
First authorship, execution of experiments, data analysis, figure design, writing.
Year
2011
Species
Human
Reference
blog
Center for Molecular Neurobiology Hamburg
Hertie Neuroscience Network
Heatmaps from tidy data
Dr. Martini Prize
Posts
blog
Center for Molecular Neurobiology Hamburg
Image: Simon Wiegert
Year
2021
We are beyond excited that our research is featured in a brand new brochure published by the Center for Molecular Neurobiology Hamburg.
Established in 1987 as the first center for basic research in molecular neurobiology in Germany, the Center for Molecular Neurobiology Hamburg today consists of seven institutes, nine research groups, four guest groups and seven core facilities. As an interdisciplinary research center it combines cutting edge expertise in synapse biology, neuroimmunology, neurogenetics, systems biology, systems immunology, optogenetics, cognition and development.
For an exclusive look behind the scenes of our Bassoon story see page 15. And for getting to know the lab behind the beautiful cover image check out Simon Wiegert.
blog
Hertie Neuroscience Network
Year
2020
I am excited to be part of the Hertie Network of Excellence in Clinical Neuroscience, which just started in June 2020 with its first symposium in Heidelberg. Thanks to the organizers for an inspiring meeting and the chance to participate remotely.
Within the network, six selected excellent research sites are initially supported for three years. The five million euros provided in the first funding period mainly support the Hertie Academy of Clinical Neuroscience, which will promote four scientific fellows per location.
In my project I will focus on viral delivery of neuroprotection against inflammation. Make sure to also checkout the other fellows from the Hertie Network Hamburg and the other sites in the Hertie Network of Excellence in Clinical Neuroscience.
blog
Heatmaps from tidy data
Image: The Biodiversity Heritage Library
Year
2019
The clarity and ease of use of the tidyverse ecosystem spearheaded by Hadley Wickham made it an essential tool for a whole generation of data scientists working with R. The concept of tidy data and its manipulation has proven to be so intuitive and powerful that many people, including me, would not like to miss it.
In case you have not come across the tidyverse yet, I highly recommend the free online book R for Data Science. I guess, it is save to say that this book permanently changed the way I do analysis every day.
However, if you adopted the tidyverse philosophy, you really feel the pain when you are forced to go back to data types like matrices and lists, for example when constructing gene expression heatmaps. As this is a task I am frequently confronted with, I developed the R package tidyheatmaps that allows you to easily plot complex heatmaps from tidy data. It includes straightforward formatting, annotation, clustering and scaling with just a few additional key strokes.
Finally, I want to give a really big shout-out to Raivo Kolde who developed the great pheatmap package, which is doing all the heavy lifting behind the scenes of tidyheatmaps.
blog
Dr. Martini Prize
Year
2018
I am very honored to receive the Dr. Martini Prize, handed over by Hamburg Senator for Science, Research and Equality, Katharina Fegebank, for my work on immune regulation during pregnancy.
The Dr. Martini Prize is the oldest medical prize in Germany. Since 1883 it has been awarded annually on February 12, the anniversary of Erich Martini’s death. The prize is dedicated to the “promotion of young scientists” and is awarded by the Dr. Martini Foundation to scientists who work in Hamburg hospitals and are engaged in basic clinical research and new therapeutic approaches.
About
Jan Broder Engler is a postdoctoral fellow at the Institute of Neuroimmunology and Multiple Sclerosis at the Universitätsklinikum Hamburg-Eppendorf.
During his medical studies at the Charité – Universitätsmedizin Berlin he joined the group of Gabriela Riemekasten for T cell autoimmunity at the German Rheumatism Research Centre Berlin. He received his MD in 2010 for investigating T cell responses to a nuclear autoantigen in systemic lupus erythematosus1.
After completing his studies in Berlin he joined the group of Manuel Friese at the Institute of Neuroimmunology and Multiple Sclerosis in Hamburg and focussed on mechanisms of pregnancy-induced immune tolerance in multiple sclerosis2. While working on this topic he was involved in several immunological projects3–5 and received his PhD in human biology in 2015.
Sparked by a workshop at the The European Bioinformatics Institute in 2014, he got fascinated by systems biology. He began to establish laboratory and computational workflows for transcriptomics, single-cell transcriptomics and epigenetics in the lab. Using these techniques, he investigated neuronal responses to inflammation and their consequence for neuronal survival6,7. Moreover, he applied T cell receptor sequencing to characterize the suppression of multiple sclerosis by pregnancy8,9.
Currently, Broder works on neuronal injury and develops strategies to equip neurons with countermeasures against stress and inflammation. Since 2020 he is a fellow of the Hertie Academy of Clinical Neuroscience.
For his data analyses and visualizations he strongly relies on the ecosystem around the programming language R, for which he develops open source software tools.
funding
Institute of Neuroimmunology and Multiple Sclerosis – Universitätsklinikum Hamburg-Eppendorf – Gemeinnützige Hertie-Stiftung – Landesforschungsförderung Hamburg