idw – Informationsdienst Wissenschaft

Nachrichten, Termine, Experten

Grafik: idw-Logo
Science Video Project

idw-News App:


Google Play Store

16.01.2024 16:34

Killer T Cells Support Tissue Regeneration

Dr. Kerstin Wild Stabsstelle „Strategische Entwicklung“
Leibniz-Institut für Immuntherapie

    Researchers at the Leibniz Institute for Immunotherapy (LIT) have demonstrated that killer T cells of the immune system not only eliminate pathologically altered cells, but also promote the subsequent tissue wound healing process.

    One of the main functions of the immune system is to defend the body against infections or cancer. This task is efficiently carried out by immune cells known as killer T cells. These cells possess the ability to destroy body cells that are, for example, infected by viruses or transformed into tumor cells. However, what happens after the destruction of infected body cells? How is tissue damage, resulting from the destruction of target cells, repaired, and organ function restored? These questions were examined in detail by the Immunology Division of the LIT.

    "In wound healing experiments with human virus-specific killer T cells we observed that after the destruction of infected cells, neighboring cells began to divide and fill the gap," describes Michael Delacher, one of the main authors of the study. In the experiments, a wound was created in a seeded cell layer. Culture supernatants from activated killer T cells caused this wound to close quickly. "This indicates that soluble factors produced by killer T cells during the destruction of infected cells support the healing of the remaining tissue cells," explains main author Lisa Schmidleithner.

    Which factors mediate this surprising healing property? The authors found that growth factors such as amphiregulin are involved in the wound healing effect. Human killer T cells can produce these growth factors and stimulate other cells in the tissue to produce them as well. In addition to these growth factors, "classic" immune messengers such as tumor necrosis factor and interferon-gamma can enhance the impact of amphiregulin and support the wound healing effect.

    To better understand the impact of the regenerative effects of killer T cells, human mini-organs, called organoids, were co-cultured with killer T cells. "We observed that the number and size of these organoids significantly increased when activated killer T cells or their released growth factors were present," reports main author Philipp Stüve. This suggests that killer T cell-mediated wound healing processes can influence complex regeneration processes.

    In addition to these positive effects on tissue regeneration and wound healing, the same killer T cell-derived growth factors could potentially promote diseases such as cancer. "Indeed, in further experiments, we observed that factors produced by activated killer T cells also enhanced the growth of tumor cells," reports Malte Simon, one of the main authors of the study.

    What do these results mean for further research?

    "Our data suggest that killer T cells not only destroy pathologically altered cells but also initiate the subsequent tissue regeneration," explains Markus Feuerer, the lead author of the study. This mechanism could be useful in the context of viral infections to promote wound closure after the destruction of infected cells and thus restore functionality of the tissue. However, in the context of tumor diseases, this could promote the growth of undestroyed tumor cells. Further research at the LIT must now clarify how to separate the destruction capacity from the wound-healing function of killer T cells. One possible approach is through so-called CAR T cell therapies, where killer T cells are genetically optimized to better destroy tumors. In the cell engineering process, it might be possible to delete the wound-healing capabilities of killer T cells.

    The Leibniz Institute for Immunotherapy (LIT) is an institute within the Leibniz Association located in Regensburg, Germany. Our mission is to develop innovative therapies for the treatment of cancer, autoimmunity, and chronic inflammation. By reprogramming immune cells through synthetic and pharmacological strategies, we build cells that save lives.

    Wissenschaftliche Ansprechpartner:

    Prof. Dr. Markus Feuerer
    Head, Division of Immunology

    LIT - Leibniz Institute for Immunotherapy
    c/o University Hospital Regensburg
    Franz-Josef-Strauss-Allee 11
    93053 Regensburg, Germany

    phone: +49 941 944 38121

    Professor of Immunology
    Head, Chair for Immunology
    University of Regensburg


    Journal of Experimental Medicine


    Released factors from activated killer T cells promote the growth of human mini-organs (organoids).
    Released factors from activated killer T cells promote the growth of human mini-organs (organoids).

    Merkmale dieser Pressemitteilung:
    Journalisten, Wissenschaftler
    Biologie, Ernährung / Gesundheit / Pflege, Medizin
    Forschungsergebnisse, Wissenschaftliche Publikationen


    Released factors from activated killer T cells promote the growth of human mini-organs (organoids).

    Zum Download



    Die Suche / Erweiterte Suche im idw-Archiv

    Sie können Suchbegriffe mit und, oder und / oder nicht verknüpfen, z. B. Philo nicht logie.


    Verknüpfungen können Sie mit Klammern voneinander trennen, z. B. (Philo nicht logie) oder (Psycho und logie).


    Zusammenhängende Worte werden als Wortgruppe gesucht, wenn Sie sie in Anführungsstriche setzen, z. B. „Bundesrepublik Deutschland“.


    Die Erweiterte Suche können Sie auch nutzen, ohne Suchbegriffe einzugeben. Sie orientiert sich dann an den Kriterien, die Sie ausgewählt haben (z. B. nach dem Land oder dem Sachgebiet).

    Haben Sie in einer Kategorie kein Kriterium ausgewählt, wird die gesamte Kategorie durchsucht (z.B. alle Sachgebiete oder alle Länder).