A researcher in neuroimmunology &
systems biology

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

Publication

Reference

M. Kaufmann, H. Evans, A.-L. Schaupp, J. B. Engler, G. Kaur, A. Willing, N. Kursawe, C. Schubert, K. E. Attfield, L. Fugger, M. A. Friese, Identifying CNS-colonizing T cells as potential therapeutic targets to prevent progression of multiple sclerosis. Med. 2, 296–312.e8 (2021).

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

Publication

Reference

B. Schattling, J. B. Engler, C. Volkmann, N. Rothammer, M. S. Woo, M. Petersen, I. Winkler, M. Kaufmann, S. C. Rosenkranz, A. Fejtova, U. Thomas, A. Bose, S. Bauer, S. Träger, K. K. Miller, W. Brück, K. E. Duncan, G. Salinas, P. Soba, E. D. Gundelfinger, D. Merkler, M. A. Friese, Bassoon proteinopathy drives neurodegeneration in multiple sclerosis. Nature Neuroscience. 22, 887–896 (2019).

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

Publication

Reference

J. B. Engler, N. F. Heckmann, J. Jäger, S. M. Gold, M. A. Friese, Pregnancy Enables Expansion of Disease-Specific Regulatory T Cells in an Animal Model of Multiple Sclerosis. Journal of immunology (Baltimore, Md. : 1950), ji1900611 (2019).

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

Publication

Reference

C. Ramien, E. C. Yusko, J. B. Engler, S. Gamradt, K. Patas, N. Schweingruber, A. Willing, S. C. Rosenkranz, A. Diemert, A. Harrison, M. Vignali, C. Sanders, H. S. Robins, E. Tolosa, C. Heesen, P. C. Arck, A. Scheffold, K. Chan, R. O. Emerson, M. A. Friese, S. M. Gold, T Cell Repertoire Dynamics during Pregnancy in Multiple Sclerosis. Cell Reports. 29, 810–815.e4 (2019).

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

Publication

Reference

L. Schirmer, D. Velmeshev, S. Holmqvist, M. Kaufmann, S. Werneburg, D. Jung, S. Vistnes, J. H. Stockley, A. Young, M. Steindel, B. Tung, N. Goyal, A. Bhaduri, S. Mayer, J. B. Engler, O. A. Bayraktar, R. J. M. Franklin, M. Haeussler, R. Reynolds, D. P. Schafer, M. A. Friese, L. R. Shiow, A. R. Kriegstein, D. H. Rowitch, Neuronal vulnerability and multilineage diversity in multiple sclerosis. Nature, 1–8 (2019).

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

Publication

Reference

J. B. Engler, N. Kursawe, M. E. Solano, K. Patas, S. Wehrmann, N. Heckmann, F. Lühder, H. M. Reichardt, P. C. Arck, S. M. Gold, M. A. Friese, Glucocorticoid receptor in T cells mediates protection from autoimmunity in pregnancy. Proceedings of the National Academy of Sciences. 114, E181–E190 (2017).

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

Publication

Reference

F. Ufer, P. Vargas, J. B. Engler, J. Tintelnot, B. Schattling, H. Winkler, S. Bauer, N. Kursawe, A. Willing, O. Keminer, O. Ohana, G. Salinas-Riester, O. Pless, D. Kuhl, M. A. Friese, Arc/Arg3.1 governs inflammatory dendritic cell migration from the skin and thereby controls T cell activation. Science Immunology. 1, eaaf8665–eaaf8665 (2016).

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

Publication

Reference

M. Piédavent-Salomon, A. Willing, J. B. Engler, K. Steinbach, S. Bauer, B. Eggert, F. Ufer, N. Kursawe, S. Wehrmann, J. Jäger, S. Reinhardt, M. A. Friese, Multiple sclerosis associated genetic variants of CD226 impair regulatory T cell function. Brain : a journal of neurology. 138, 3263–74 (2015).

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

Publication

Reference

J. B. Engler, R. Undeutsch, L. Kloke, S. Rosenberger, M. Backhaus, U. Schneider, K. Egerer, D. Dragun, J. Hofmann, D. Huscher, G.-R. R. Burmester, J. Y. Humrich, P. Enghard, G. Riemekasten, Unmasking of autoreactive CD4 T cells by depletion of CD25 regulatory T cells in systemic lupus erythematosus. Annals of the rheumatic diseases. 70, 2176–83 (2011).

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.

Download

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 projects35 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.

Selected publications

1.
J. B. Engler, R. Undeutsch, L. Kloke, S. Rosenberger, M. Backhaus, U. Schneider, K. Egerer, D. Dragun, J. Hofmann, D. Huscher, G.-R. R. Burmester, J. Y. Humrich, P. Enghard, G. Riemekasten, Unmasking of autoreactive CD4 T cells by depletion of CD25 regulatory T cells in systemic lupus erythematosus. Annals of the rheumatic diseases. 70, 2176–83 (2011).
2.
J. B. Engler, N. Kursawe, M. E. Solano, K. Patas, S. Wehrmann, N. Heckmann, F. Lühder, H. M. Reichardt, P. C. Arck, S. M. Gold, M. A. Friese, Glucocorticoid receptor in T cells mediates protection from autoimmunity in pregnancy. Proceedings of the National Academy of Sciences. 114, E181–E190 (2017).
3.
M. Piédavent-Salomon, A. Willing, J. B. Engler, K. Steinbach, S. Bauer, B. Eggert, F. Ufer, N. Kursawe, S. Wehrmann, J. Jäger, S. Reinhardt, M. A. Friese, Multiple sclerosis associated genetic variants of CD226 impair regulatory T cell function. Brain : a journal of neurology. 138, 3263–74 (2015).
4.
F. Ufer, P. Vargas, J. B. Engler, J. Tintelnot, B. Schattling, H. Winkler, S. Bauer, N. Kursawe, A. Willing, O. Keminer, O. Ohana, G. Salinas-Riester, O. Pless, D. Kuhl, M. A. Friese, Arc/Arg3.1 governs inflammatory dendritic cell migration from the skin and thereby controls T cell activation. Science Immunology. 1, eaaf8665–eaaf8665 (2016).
5.
J. Tintelnot, F. Ufer, J. B. Engler, H. Winkler, K. Lücke, H. Mittrücker, M. A. Friese, Arc/Arg3.1 defines dendritic cells and Langerhans cells with superior migratory ability independent of phenotype and ontogeny in mice. European Journal of Immunology (2019).
6.
B. Schattling, J. B. Engler, C. Volkmann, N. Rothammer, M. S. Woo, M. Petersen, I. Winkler, M. Kaufmann, S. C. Rosenkranz, A. Fejtova, U. Thomas, A. Bose, S. Bauer, S. Träger, K. K. Miller, W. Brück, K. E. Duncan, G. Salinas, P. Soba, E. D. Gundelfinger, D. Merkler, M. A. Friese, Bassoon proteinopathy drives neurodegeneration in multiple sclerosis. Nature Neuroscience. 22, 887–896 (2019).
7.
L. Schirmer, D. Velmeshev, S. Holmqvist, M. Kaufmann, S. Werneburg, D. Jung, S. Vistnes, J. H. Stockley, A. Young, M. Steindel, B. Tung, N. Goyal, A. Bhaduri, S. Mayer, J. B. Engler, O. A. Bayraktar, R. J. M. Franklin, M. Haeussler, R. Reynolds, D. P. Schafer, M. A. Friese, L. R. Shiow, A. R. Kriegstein, D. H. Rowitch, Neuronal vulnerability and multilineage diversity in multiple sclerosis. Nature, 1–8 (2019).
8.
J. B. Engler, N. F. Heckmann, J. Jäger, S. M. Gold, M. A. Friese, Pregnancy Enables Expansion of Disease-Specific Regulatory T Cells in an Animal Model of Multiple Sclerosis. Journal of immunology (Baltimore, Md. : 1950), ji1900611 (2019).
9.
C. Ramien, E. C. Yusko, J. B. Engler, S. Gamradt, K. Patas, N. Schweingruber, A. Willing, S. C. Rosenkranz, A. Diemert, A. Harrison, M. Vignali, C. Sanders, H. S. Robins, E. Tolosa, C. Heesen, P. C. Arck, A. Scheffold, K. Chan, R. O. Emerson, M. A. Friese, S. M. Gold, T Cell Repertoire Dynamics during Pregnancy in Multiple Sclerosis. Cell Reports. 29, 810–815.e4 (2019).