Immunological control of hepatic and intestinal homeostasis

Date

Nov 10, 2014

Time

4:00 PM - 5:00 PM

Speaker

Prof. Dr. Sebastian Zeissig, Department of Internal Medicine I, University Medical Center Schleswig Holstein Kiel, Christian-Albrechts-University Kiel

Series

CMCB Life Sciences Seminar

Language

en

Main Topic

Biologie

Other Topics

Biologie, Medizin

Host

Elly Tanaka / Jochen Hampe

Description

If you want to talk to the speaker, please contact Andrea Meinhardt (Andrea.Meinhardt@crt-dresden.de). Everybody is welcome! Abstract My laboratory is interested in the mechanisms which govern homeostasis and prevent inflammation in host organs such as the liver and the intestine. Of particular interest to our studies is the role of parenchymal cells as non-professional antigen-presenting cells in the regulation of innate and adaptive immunity. As such, we could demonstrate that hepatocytes and intestinal epithelial cells can present lipid antigens via the non-classical MHC class I molecule CD1d to natural killer T cells thus providing the basis for protection from infectious hepatitis as well as intestinal inflammation (Zeissig et al., Nat. Med. 2012; Olszak et al., Nature 2014). Furthermore, this work revealed an essential role of the commensal microbiota and microbiota-derived lipid antigens in the control of homeostasis at mucosal surfaces and demonstrated that primary defects in lipid antigen presentation are associated with immunodeficiency in humans (An et al., Cell 2014; Olszak et al., Science 2012; Zeissig et al., J. Clin. Invest.; Zeissig et al., Nat. Immunol. 2014). Current work in the laboratory is focused on the identification of lipid antigens which link metabolism and immunity in the liver and the intestine. Further, we are investigating the role of inflammation-associated pathways in the intestinal epithelium and their contribution to microbiota-dependent intestinal stem cell function and the control of inflammation, regeneration, and carcinogenesis. References An D, Oh SF, Olszak T, Neves JF, Erturk-Hasdemir D, Lu X, Zeissig S, Blumberg RS, Kasper DL. Sphingolipids from a symbiotic microbe regulate homeostasis of host intestinal natural killer T cells. Cell. 2014 Jan 16;156(1-2): 123-33. Olszak T, Neves JF, Dowds CM, Baker K, Glickman J, Davidson NO, Lin CS, Jobin C, Brand S, Sotlar K, Wada K, Katayama K, Nakajima A, Mizuguchi H, Kawasaki K, Nagata K, Müller W, Snapper SB, Schreiber S, Kaser A, Zeissig S*, Blumberg RS*. Protective mucosal immunity mediated by epithelial CD1d and IL-10. Nature. 2014 May 22;509(7501):497-502. (*co-senior authors) Olszak T, An D, Zeissig S, Vera MP, Richter J, Franke A, Glickman JN, Siebert R, Baron RM, Kasper DL, Blumberg RS. Microbial exposure during early life has persistent effects on tissue-associated iNKT cells and their function. Science. 2012 Apr 27;336(6080):489-93. Zeissig S, Dougan SK, Barral D, Junker Y, Chen Z, Kaser A, Ho M, Mandel H, McIntyre A, Kennedy SM, Painter, GF, Veerapen N, Besra GS, Cerundolo V, Yue S, Beladi S, Behar SM, Chen X, Gumpertz JE, Breckpot K, Raper A, Baer A, Exley MA, Hegele RA, Cuchel M, Rader DJ, Davidson NO, Blumberg RS, Primary deficiency of microsomal triglyceride transfer protein in human abetalipoproteinemia is associated with loss of CD1 function. J Clin Invest. 2010 Aug 2;120(8):2889-99. Zeissig S, Blumberg RS. Life at the beginning: perturbation of the microbiota by antibiotics in early life and its role in health and disease. Nat. Immunol. 2014 Mar 19; 15(4): 307-10. Zeissig S, Murata M, Sweet L, Publicover J, Hu Z, Kaser A, Bosse E, Iqbal J, Hussain MM, Balschun K, Röcken C, Arlt A, Günther R, Hampe J, Schreiber S, Baron JL, Moody DB, Liang JT, Blumberg RS. Hepatitis B virus-induced alterations in hepatocyte CD1d lipid antigens activate natural killer T cells and contribute to protective immunity. Nat. Med. 2012. Jul;18(7):1060-8.

Links

• to announcement of the organizer

Last modified: Nov 10, 2014, 8:45:45 AM