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Tuberculosis vaccine strengthens immune system

Study by the Universities of Bonn and Nijmegen explains how BCG vaccination reduces susceptibility to infections

A tuberculosis vaccine developed 100 years ago also makes vaccinated persons less susceptible to other infections. While this effect has been recognized for a long time, it is not known what causes it. Together with colleagues from Australia and Denmark, researchers from Radboud university medical center the universities of Nijmegen and Bonn have now presented a possible answer to this question. Their results are also interesting against the background of the Covid-19 pandemic: several studies are currently testing the use of the vaccine in preventing severe disease progression in populations at risk such as hospital staff and elderly individuals. The study is published in the journal "Cell Host & Microbe".


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Branko Cirovic, L. Charlotte J. de Bree, Laszlo Groh, Bas A. Blok, Joyce Chan, Walter J.F.M. van der Velden, M.E.J. Bremmers, Reinout van Crevel, Kristian Händler, Simone Picelli, Jonas Schulte-Schrepping, Kathrin Klee, Marije Oosting, Valerie A.C.M. Koeken, Jakko van Ingen, Yang Li, Christine S. Benn, Joachim L. Schultze, Leo A.B. Joosten, Nigel Curtis, Mihai G. Netea und Andreas Schlitzer: BCG vaccination in humans elicits trained immunity via the hematopoietic progenitor compartment; Cell Host & Microbe; DOI: 10.1016/j.chom.2020.05.014

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Immune cells remember their location

A new AI-based method reconstructs spatial information about where immune cells were originally located in an organ, even after these cells have been removed from the tissue and analyzed individually. To accomplish this, Researchers at the University Hospital Bonn (UKB) and the University of Bonn use the transcriptome, i.e., the entirety of all messenger RNA transcripts produced by genes within a cell at a given time. The work has now been published in the journal Advanced Science and introduces the new MERLIN algorithm.
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B cells maintain antigen presentation in the splenic marginal zone

A team of international researchers, including ImmunoSensation³ members Prof. Niels Lemmermann and Prof. Andreas Schlitzer, shows that B cells support antiviral CD8⁺ T-cell responses beyond antibody production. In a murine CMV model, B-cell deficiency weakened virus-specific CD8⁺ T-cell responses. Mechanistically, B-cell-derived lymphotoxin β maintained CD169⁺ macrophages and Langerin⁺ cDC1 cells in the splenic marginal zone, enabling efficient T-cell priming. The study was published in Cellular & Molecular Immunology.
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New findings on infection with the Epstein-Barr virus

The Epstein-Barr virus (EBV) can cause certain types of cancer or autoimmune diseases, but how the body controls this common viral infection is largely unknown. Bonn researchers have now identified genetic and non-genetic factors that help the body fight EBV. To do this, they evaluated genome sequencing data, which is actually intended for characterizing the human genome, in a new way. Using the new technique, they were able to estimate the amount of EBV in the blood and find correlations in large health data sets. Their findings have now been published in the renowned journal Nature.
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