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Research

Medical Omics

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Overview

The Medical Omics lab aims to improve healthcare and basic research by providing artificial intelligence-driven tools for the analysis of large biomedical datasets. For comprehensive insights in disease entities, we aim to include multiple layers of data, such as single-cell RNA sequencing, methylomics data and medical imaging. In close collaborations with clinicians at the Charité, we develop clinical decision support systems for cancer treatment as well as solutions for routine clinical tasks such as automated annotation of radiological images.

Topics

Single-cell sequencing

Gene set inference

In contrast to traditional bulk sequencing methods for genomics, single-cell sequencing gives insights into the workings of a tissue at unprecedented resolution. However, this mass of oftentimes exceedingly noisy and sparse data can be overwhelming when approached with traditional approaches. We have developed a deep-learning-based tool that helps identify functionally related gene sets in single-cell data as well as the cell types and conditions they are related to, allowing researches to more quickly grasp the processes shaping the tissue they are investigating.

COVID-19

During the COVID-19 pandemic, we worked together with other groups at Hidih, Charité, the University Hospital Leipzig and the DKFZ to deliver some of the first single-cell reference atlases of airways of healthy as well as SARS-CoV-2-positive individuals freely available to the research community, and further used these techniques successfully to demonstrate why some groups of patients are at higher risk of severe COVID-19, while children generally present with less severe disease courses. Beyond scientific curiosity, these projects helped jump-start a phase II clinical trial of a potential drug for the treatment of severe COVID-19.

Other areas

Beyond these two focus areas, we have been involved in a number of different single-cell projects, ranging from spermatogenesis to cardiac arrhythmias, as well as in bioinformatics methods development to support novel techniques for the study of individual cells’ transcriptomes.

Glioblastoma

Several ongoing projects are focused on improving diagnosis and management of glioblastoma, the most common and most aggressive primary brain tumor in adults.

Medical imaging

To plan surgery and radiation therapy, the precise location of organs at risk (OARs) and the gross tumor volume (GTV) needs to be determined from 3D MRI or CT scans. Manually annotating these three-dimensional scans is a time-consuming and tedious task. We provide deep neural networks that can accurately segment OARs and GTVs in a matter of seconds, while achieving a performance comparable to human specialist level.

Moreover, we aim to predict the patient survival time with the goal of forecasting the benefit for a patient of receiving a specific radiotherapy regimen while minimizing dose and maximizing efficacy. To ensure the robustness and interpretability of these predictions, we use multiple data sources like radiological features, radiotherapy data, and clinical metadata.

 

Methylomics

DNA Methylation plays a large role in glioblastoma biology, for example through modulation of the levels of DNA repair enzymes that render a tumor resistant to radiotherapy. Different classes of glioblastomas can be distinguished by their methylation pattern, with relevance for prognosis and treatment. In recent years, shallow nanopore-based DNA sequencing has improved to a level where it can be used to get a reliable, but exceedingly sparse image of DNA methylation within a sample. To bring this technique to the clinics, we work on developing and improving machine learning methods that are equipped to deal with this extreme sparsity and can reliably distinguish different classes of glioblastoma.

Multi-omics

Ultimately, we aim to integrate the results of the different subprojects on glioblastoma, creating a unified framework for diagnosis and management of glioblastoma based on a multitude of data modalities.

soeren

Sören Lukassen studied Molecular Medicine and received a PhD in human genetics from the FAU Erlangen-Nürnberg, where he specialized in (single-cell) sequenzing data analysis and deep learning. He joined Christian Conrads lab in Heidelberg in 2018 and moved to Berlin the same year. Since 2021, he leads the junior research group Medical Omics, which focuses on integrating data from multiple sources for diagnosis and treatment of diseases. 

Sören Lukassen

Group leader

BIH Center for Digital Health
Kapelle-Ufer 2
10117 Berlin
soeren.lukassen@charite.de

Research Group

Nabil Jabareen
Doctoral Student
BIH Center for Digital Health
Kapelle-Ufer 2
10117 Berlin
nabil.jabareen@charite.de
Dongsheng Yuan
Doctoral Student
BIH Center for Digital Health
Kapelle-Ufer 2
10117 Berlin
dongsheng.yuan@charite.de
BIH Center for Digital Health
Kapelle-Ufer 2
10117 Berlin

Publications

Loske J.*, Röhmel J.*, Lukassen S.*, Stricker S., Magalhães V., Liebig J., Chua R., Thürmann L., Messingschlager M., Seegebarth A., Timmermann B., Klages S., Ralser M., Sawitzki B., Sander L., Corman V., Conrad C., Laudi S., Binder M., Trump S., Eils R., Mall M.A., Lehmann I. (2021). Pre-activated anti-viral innate immunity in the upper airways controls early SARS-CoV-2 infection in children. Nature Biotechnology doi: 10.1038/s41587-021-01037-9

Trump S.*, Lukassen S.*, Anker M.S.*, Chua R.L.*, Liebig J.*, Thürmann L.*, Corman V.M.*, Binder M., Loske J., Klasa C., Krieger T., Hennig B.P., Messingschlager M., Pott F., Kazmierski J., Twardziok S., Albrecht J.P., Eils J., Hadzibegovic S., Lena A., Heidecker B., Bürgel T., Steinfeldt J., Goffinet C., Kurth F., Witzenrath M., Volker M.T., Muller S.D., Liebert U.G., Ishaque N., Kaderali L., Sander L.E., Drosten C., Laudi S., Eils R., Conrad C., Landmesser U., Lehmann I. (2021) Hypertension delays viral clearance and exacerbates airway hyperinflammation in patients with COVID-19. Nature Biotechnology doi: 10.1038/s41587-020-00796-1

Chua, R.L.*, Lukassen, S.*,Trump, S.*, Hennig, B.P.*, Wendisch, D.*, Pott, F., Debnath, O., Thürmann, L., Kurth, F., Völker, M.T., Kazmierski, J., Timmermann, B., Twardziok, S., Schneider, S., Machleidt, F., Müller-Redetzky, H., Maier, M., Krannich, A., Schmidt, S., Balzer, F., Liebig, J., Loske, J., Suttorp, N., Eils, J., Ishaque, N., Liebert, U.G., von Kalle, C., Hocke, A., Witzenrath, M., Goffinet, C., Drosten, C., Laudi, S.§,Lehmann, I., Conrad, C., Sander, L.-E. & Eils, R. (2020). COVID-19 severity correlates with airway epithelium-immune cell interactions identified by single-cell analysis. Nature Biotechnology doi: 10.1038/s41587-020-0602-4

Lukassen, S.*, Chua, R. L.*, Trefzer, T.*, Kahn, N.C.*, Schneider, M.A.*, Muley, T., Winter, H., Meister, M., Veith, C., Boots, A.W., Hennig, B.P., Kreuter, M., Conrad, C., & Eils, R. (2020). SARS-CoV-2 receptor ACE2 and TMPRSS2 are primarily expressed in bronchial transient secretory cells. EMBO Journal doi: 10.15252/embj.20105114

Lukassen S.*, Ten F.W.*, Adam L., Eils R., Conrad C. (2020). Gene set inference from single-cell sequencing data using a hybrid of matrix factorization and variational autoencoders. Nature Machine Intelligence doi: 10.1038/s42256-020-00269-9

 

*These authors contributed equally

 

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