Mononuclear Phagocyte Biology
Epigenetics of Cell Differentiation

Journal Club

Thursday 9:00 am, biweekly
Due to COVID-19 the meeting is being held via Zoom


next date: 29.07.2021
Intestinal goblet cells protect against GVHD after allogeneic stem cell transplantation via Lypd8

Ara et al.

Sci. Transl. Med. 12, eaaw0720 (2020) 1 July 2020

Graft-versus-host disease (GVHD) and infection are major obstacles to successful allogeneic hematopoietic stem cell transplantation (HSCT). Intestinal goblet cells form the mucus layers, which spatially segregate gut microbiota from host tissues. Although it is well known that goblet cell loss is one of the histologic features of GVHD, effects of their loss in pathophysiology of GVHD remain to be elucidated. In mouse models of allogeneic HSCT, goblet cells in the colon were significantly reduced, resulting in disruption of the inner mucus layer of the colon and increased bacterial translocation into colonic mucosa. Pretransplant administration of interleukin-25 (IL-25), a growth factor for goblet cells, protected goblet cells against GVHD, prevented bacterial translocation, reduced plasma concentrations of interferon-gamma (IFN-gamma) and IL-6, and ameliorated GVHD. The protective role of IL-25 was dependent on Lypd8, an antimicrobial molecule produced by enterocytes in the colon that suppresses motility of flagellated bacteria. In clinical colon biopsies, low numbers of goblet cells were significantly associated with severe intestinal GVHD, increased transplant-related mortality, and poor survival after HSCT. Goblet cell loss is associated with poor transplant outcome, and administration of IL-25 represents an adjunct therapeutic strategy for GVHD by protecting goblet cells.

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Schedule

20.05.21 AG Kreutz
24.06.21 AG Pukrop
15.07.21 AG Rehli
29.07.21 AG Hoffmann

last updated: 26.07.2021


Michael Rehli • Dept. Internal Medicine III • University Hospital
F.-J.-Strauss Allee 11 • 93053 Regensburg • Germany

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