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Johannes Bode

About Johannes Bode:
No description specified

SEEK ID: https://seek.lisym.org/people/35

Location: Germany

Expertise: non parenchymal cells, Imaging and image analysis, Jak/STAT pathway, Liver injury and regeneration, Hepatocytes, Inflammation

Tools: Cell and tissue culture, confocal microscopy, Mouse surgery, Isolation purification and separation, Immunohistochemistry, Molecular Biology, Isolation and cultivation of mouse hepatocyte

ORCID: Not specified

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LiSyM network

This comprises the whole LiSyM network

Public web page: http://www.lisym.org

Regeneration and Repair in Acute-on-Chronic Liver Failure (LiSyM-ACLF - Pillar III)

The incidence of this life-threatening acute-on-chronic liver failure (ACLF) is increasing, and early detection and cure are urgent clinical needs. Pillar III applies a Systems Medicine approach to identify the critical mechanisms of acute-on-chronic liver failure (ACLF) and to foster liver regeneration and repair.

Public web page: Not specified

Chronic Liver Disease Progression (LiSyM-DP - Pillar II)

Chronic liver diseases (CLD) progression leads to cirrhosis, often cancer, and ultimately to organ failure and death. Because of the complexity of this scenario, a Systems Medicine approach is chosen to develop strategies to better characterize progression and resolution of fibrosis. Pillar II aims to define key molecular mechanisms and structural changes in tissue architecture during the progression of CLD by visualizing and quantifying at a cellular level, tissue and organ scale.

Public web page: Not specified

2 hidden items
Cooperative and distinct functions of MK2 and MK3 in the regulation of the macrophage transcriptional response to lipopolysaccharide.
Chronic Liver Disease Progression (LiSyM-DP - Pillar II), Regeneration and Repair in Acute-on-Chronic Liver Failure (LiSyM-ACLF - Pillar III)

Abstract (Expand)

The p38(MAPK) downstream targets MAPKAP kinases (MK) 2 and 3 are critical for the regulation of the macrophage response to LPS. The extents to which these two kinases act cooperatively and distinctly … in regulating LPS-induced inflammatory cytokine expression are still unclear. To address this uncertainty, whole transcriptome analyses were performed using bone marrow-derived macrophages (BMDM) generated from MK2(-/-) or MK2/3(-/-) animals and their wild-type littermates. The results suggest that in BMDM, MK2 and MK3 not only cooperatively regulate the transcript expression of signaling intermediates, including IL-10, IL-19, CXCL2 and the IL-4 receptor (IL-4R)alpha subunit, they also exert distinct regulatory effects on the expression of specific transcripts. Based on the differential regulation of gene expression by MK2 and MK3, at least six regulatory patterns were identified. Importantly, we confirmed our previous finding, which showed that in the absence of MK2, MK3 negatively regulates IFN-beta. Moreover, this genome-wide analysis identified the regulation of Cr1A, NOD1 and Serpina3f as similar to that of IFN-beta. In the absence of MK2, MK3 also delayed the nuclear translocation of NFkappaB by delaying the ubiquitination and subsequent degradation of IkappaBbeta, reflecting the substantial plasticity of the response of BMDM to LPS.

Authors: Christian Ehlting, J. Rex, U. Albrecht, R. Deenen, C. Tiedje, K. Kohrer, O. Sawodny, M. Gaestel, D. Haussinger, Johannes Bode

Date Published: 30th Jul 2019

Journal: Sci Rep

Quantitative and integrative analysis of paracrine hepatocyte activation by nonparenchymal cells upon lipopolysaccharide induction
LiSyM network

Abstract

Not specified

Authors: Katharina Beuke, Frank A. Schildberg, Federico Pinna, Ute Albrecht, Roman Liebe, Michaela Bissinger, Peter Schirmacher, Steven Dooley, Johannes Bode, Percy A. Knolle, Ursula Kummer, Kai Breuhahn, Sven Sahle

Date Published: 1st Mar 2017

Journal: FEBS J

Model Based Targeting of IL-6-Induced Inflammatory Responses in Cultured Primary Hepatocytes to Improve Application of the JAK Inhibitor Ruxolitinib.
Regeneration and Repair in Acute-on-Chronic Liver Failure (LiSyM-ACLF - Pillar III)

Abstract (Expand)

IL-6 is a central mediator of the immediate induction of hepatic acute phase proteins (APP) in the liver during infection and after injury, but increased IL-6 activity has been associated with multiple … pathological conditions. In hepatocytes, IL-6 activates JAK1-STAT3 signaling that induces the negative feedback regulator SOCS3 and expression of APPs. While different inhibitors of IL-6-induced JAK1-STAT3-signaling have been developed, understanding their precise impact on signaling dynamics requires a systems biology approach. Here we present a mathematical model of IL-6-induced JAK1-STAT3 signaling that quantitatively links physiological IL-6 concentrations to the dynamics of IL-6-induced signal transduction and expression of target genes in hepatocytes. The mathematical model consists of coupled ordinary differential equations (ODE) and the model parameters were estimated by a maximum likelihood approach, whereas identifiability of the dynamic model parameters was ensured by the Profile Likelihood. Using model simulations coupled with experimental validation we could optimize the long-term impact of the JAK-inhibitor Ruxolitinib, a therapeutic compound that is quickly metabolized. Model-predicted doses and timing of treatments helps to improve the reduction of inflammatory APP gene expression in primary mouse hepatocytes close to levels observed during regenerative conditions. The concept of improved efficacy of the inhibitor through multiple treatments at optimized time intervals was confirmed in primary human hepatocytes. Thus, combining quantitative data generation with mathematical modeling suggests that repetitive treatment with Ruxolitinib is required to effectively target excessive inflammatory responses without exceeding doses recommended by the clinical guidelines.

Authors: S. Sobotta, A. Raue, X. Huang, J. Vanlier, A. Junger, S. Bohl, U. Albrecht, M. J. Hahnel, S. Wolf, N. S. Mueller, Lorenza D'Alessandro, S. Mueller-Bohl, M. E. Boehm, P. Lucarelli, S. Bonefas, G. Damm, D. Seehofer, W. D. Lehmann, S. Rose-John, F. van der Hoeven, N. Gretz, F. J. Theis, Christian Ehlting, Johannes Bode, J. Timmer, M. Schilling, U. Klingmuller

Date Published: No date defined

Journal: Front Physiol

BMP-9 interferes with liver regeneration and promotes liver fibrosis.
Regeneration and Repair in Acute-on-Chronic Liver Failure (LiSyM-ACLF - Pillar III)

Abstract (Expand)

OBJECTIVE: Bone morphogenetic protein (BMP)-9, a member of the transforming growth factor-beta family of cytokines, is constitutively produced in the liver. Systemic levels act on many organs and tissues … including bone and endothelium, but little is known about its hepatic functions in health and disease. DESIGN: Levels of BMP-9 and its receptors were analysed in primary liver cells. Direct effects of BMP-9 on hepatic stellate cells (HSCs) and hepatocytes were studied in vitro, and the role of BMP-9 was examined in acute and chronic liver injury models in mice. RESULTS: Quiescent and activated HSCs were identified as major BMP-9 producing liver cell type. BMP-9 stimulation of cultured hepatocytes inhibited proliferation, epithelial to mesenchymal transition and preserved expression of important metabolic enzymes such as cytochrome P450. Acute liver injury caused by partial hepatectomy or single injections of carbon tetrachloride (CCl4) or lipopolysaccharide (LPS) into mice resulted in transient downregulation of hepatic BMP-9 mRNA expression. Correspondingly, LPS stimulation led to downregulation of BMP-9 expression in cultured HSCs. Application of BMP-9 after partial hepatectomy significantly enhanced liver damage and disturbed the proliferative response. Chronic liver damage in BMP-9-deficient mice or in mice adenovirally overexpressing the selective BMP-9 antagonist activin-like kinase 1-Fc resulted in reduced deposition of collagen and subsequent fibrosis. CONCLUSIONS: Constitutive expression of low levels of BMP-9 stabilises hepatocyte function in the healthy liver. Upon HSC activation, endogenous BMP-9 levels increase in vitro and in vivo and high levels of BMP-9 cause enhanced damage upon acute or chronic injury.

Authors: K. Breitkopf-Heinlein, C. Meyer, C. Konig, H. Gaitantzi, A. Addante, M. Thomas, E. Wiercinska, C. Cai, Q. Li, F. Wan, C. Hellerbrand, N. A. Valous, M. Hahnel, Christian Ehlting, Johannes Bode, S. Muller-Bohl, U. Klingmuller, J. Altenoder, I. Ilkavets, M. J. Goumans, L. J. Hawinkels, S. J. Lee, M. Wieland, C. Mogler, M. P. Ebert, B. Herrera, H. Augustin, A. Sanchez, Steven Dooley, P. Ten Dijke

Date Published: No date defined

Journal: Gut

BMP-9 interferes with liver regeneration and promotes liver fibrosis.
Chronic Liver Disease Progression (LiSyM-DP - Pillar II)

Abstract (Expand)

OBJECTIVE: Bone morphogenetic protein (BMP)-9, a member of the transforming growth factor-beta family of cytokines, is constitutively produced in the liver. Systemic levels act on many organs and tissues … including bone and endothelium, but little is known about its hepatic functions in health and disease. DESIGN: Levels of BMP-9 and its receptors were analysed in primary liver cells. Direct effects of BMP-9 on hepatic stellate cells (HSCs) and hepatocytes were studied in vitro, and the role of BMP-9 was examined in acute and chronic liver injury models in mice. RESULTS: Quiescent and activated HSCs were identified as major BMP-9 producing liver cell type. BMP-9 stimulation of cultured hepatocytes inhibited proliferation, epithelial to mesenchymal transition and preserved expression of important metabolic enzymes such as cytochrome P450. Acute liver injury caused by partial hepatectomy or single injections of carbon tetrachloride (CCl4) or lipopolysaccharide (LPS) into mice resulted in transient downregulation of hepatic BMP-9 mRNA expression. Correspondingly, LPS stimulation led to downregulation of BMP-9 expression in cultured HSCs. Application of BMP-9 after partial hepatectomy significantly enhanced liver damage and disturbed the proliferative response. Chronic liver damage in BMP-9-deficient mice or in mice adenovirally overexpressing the selective BMP-9 antagonist activin-like kinase 1-Fc resulted in reduced deposition of collagen and subsequent fibrosis. CONCLUSIONS: Constitutive expression of low levels of BMP-9 stabilises hepatocyte function in the healthy liver. Upon HSC activation, endogenous BMP-9 levels increase in vitro and in vivo and high levels of BMP-9 cause enhanced damage upon acute or chronic injury.

Authors: K. Breitkopf-Heinlein, C. Meyer, C. Konig, H. Gaitantzi, A. Addante, M. Thomas, E. Wiercinska, C. Cai, Q. Li, F. Wan, C. Hellerbrand, N. A. Valous, M. Hahnel, Christian Ehlting, Johannes Bode, S. Muller-Bohl, U. Klingmuller, J. Altenoder, I. Ilkavets, M. J. Goumans, L. J. Hawinkels, S. J. Lee, M. Wieland, C. Mogler, M. P. Ebert, B. Herrera, H. Augustin, A. Sanchez, Steven Dooley, P. Ten Dijke

Date Published: 25th Mar 2017

Journal: Gut

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