DFG Research Unit FOR 721/2
Molecular Structure and Function of the Tight Junction
  Project 2   

Jörg-Dieter Schulzke, Prof. Dr. 

Division of Nutritional Medicine, Dept. of Gastroenterology, Infectiology and Rheumatology,
Campus Benjamin Franklin, Charité, Freie Universität und Humboldt-Universität, Berlin

Martin Zeitz, Prof. Dr. 
Dept. of Gastroenterology, Infectiology and Rheumatology,
Campus Benjamin Franklin
, Charité, Freie Universität und Humboldt-Universität, Berlin

Tight junction proteins in inflammatory bowel diseases

In microscopic colitis and in ulcerative colitis before and after therapy, mechanisms of epithelial barrier dysfunction are analyzed using impedance spectroscopy, scanning conductance, confocal microscopy, Western blotting, and quantitative RT-PCR analysis. During this, the expression of the tight junction molecules ZO1, occludin, tricellulin, and supposedly important claudins are characterized. In addition, apoptosic rates and epithelial lesions are assayed.

Furthermore, mechanisms of the inflammatory regulation of epithelial tight junctions and their constituent molecules are studied in HT-29/B6 colon cells. Parameter are half life, subcellular distribution, mRNA expression, translational efficiency as effectd by by miRNAs, promoter activity, and intracellular signaling pathways.

Granted by project 2

Coworkers

Publications 2010 - present (FOR 721/2)

2014

  • Bücker R, Schulz E, Günzel D, Bojarski C, Lee IM, John LJ, Wiegand S, Janßen T, Wieler LH, Dobrindt U, Beutin L, Ewers C, Fromm M, Siegmund B, Troeger H, Schulzke JD (2014) α-Haemolysin of Escherichia coli: a potentiator of inflammatory activity in the colon. Gut 63(12): 1893-1901 (IF 14.7) [PubMed] [WebPage] [PDF] [Supplements] TP2+TP7+TP1

  • Dittmann I, Amasheh M, Krug SM, Markov AG, Fromm M, Amasheh S (2014) Laurate permeabilizes the paracellular pathway for small molecules in the intestinal epithelial cell model HT-29/B6 via opening the tight junctions by reversible relocation of claudin-5. Pharm. Res. 31(9): 2539–2548 {Erratum about Title misprint: Pharm. Res. 32(2): 737} (IF 3.4) [PubMed] [WebPage] [PDF] TP1+TP2+TPZ

  • Hering NA*, Richter JF* (*shared first authorship), Fromm A, Wieser A, Hartmann S, Günzel D, Bücker R, Fromm M, Schulzke JD° (°corresponding author), Troeger H (2014) TcpC protein from E. coli Nissle improves epithelial barrier function involving PKCζ and ERK1/2 signalling in HT-29/B6 cells. Mucosal Immunol.7(2): 369-378(IF 7.0) [PubMed] [WebPage] [PDF] TP2+TP1+TP7+TPZ{2PI}

  • Richter JF, Pieper R, Zakrzewski SS, Günzel D, Schulzke JD, Van Kessel AG (2014) Diets high in fermentable protein and fiber alter tight junction protein composition with minor effect on barrier function in piglet colon. Br. J. Nutr. 111(6): 1040-1049 (IF 3.3) [PubMed] [WebPage] [PDF] [Supplements] TP7+TP2

  • Schulzke JD, Siegmund B, Günzel D (2014) New insights in intestinal secretion. Gut 147(5): 952-954 (IF 14.7) (Commentary) [PubMed] [WebPage] [PDF] TP2+TP7

2013

  • Schmidt C, Lautenschlaeger C, Collnot EM, Schumann M, Bojarski C, Schulzke JD, Lehr CM, Stallmach A (2013) Nano- and microscaled particles for drug targeting to inflamed intestinal mucosa: a first in vivo study in human patients. J. Control. Release 165(2): 139-145 (IF 7.6) [PubMed] [WebPage] [PDF]

  • TP02
  • Zakrzewski SS, Richter JF, Krug SM, Jebautzke B, Lee IM, Rieger J, Sachtleben M, Bondzio A, Schulzke JD, Fromm M, Günzel D (2013) Improved cell line IPEC-J2, characterized as a model for porcine jejunal epithelium. PLOS One 8(11): e79643 (print pages 1-12) (IF 3.7) [PubMed] [WebPage] [PDF] [Supplements] TP7+TP1+TP2+TPZ{2PI, FFEM}

2012

2011

2010

Doctoral theses

 

 Publications 2007 - 2009 (FOR 721/1)

 

Ann. N.Y. Acad. Sci. 1165   [Contents and Full Papers]

 

Previous work