Publications by authors named "Tobias Traeger"

The particular importance of the vagus nerve for the pathophysiology of peritonitis becomes more and more apparent. In this work we provide evidence for the vagal modulation of inflammation in the murine model of colon ascendens stent peritonitis (CASP). Vagotomy significantly increases mortality in polymicrobial sepsis.

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We report a case of a mediastinal cystic retrosternal process, discovered by magnetic resonance imaging (MRI) in a 19-year-old male patient, with unusual inhomogenous signals in both T1- and T2-weighted images and contrast-enhancing septation. Macroscopically, the tumor weighed 1330 g, and was constituted by one dominating cyst measuring 14 cm in diameter. Additional small cysts were seen microscopically.

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Objective: The purpose of this study is to assess the efficacy of intraarterial thrombolysis in acute and semiacute occlusions of the lower limb.

Materials And Methods: A total of 77 native arteries and 52 bypass grafts were investigated in 129 patients (mean [± SD] age, 64.6 ± 11.

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Sepsis remains a persistent problem on intensive care units all over the world. Understanding the complex mechanisms of sepsis is the precondition for establishing new therapeutic approaches in this field. Therefore, animal models are required that are able to closely mimic the human disease and also sufficiently deal with scientific questions.

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Objective: To investigate the role of tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) in postoperative polymicrobial abdominal sepsis.Sepsis is the leading cause of death among critically ill surgical patients. TRAIL is commonly known as an apoptosis-inducing agent in cancer cells.

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Objective: During abdominal sepsis, the activation of hepatic Kupffer cells (KC) and its consequences are of central interest. This study evaluates the impact of selective KC depletion on hepatic microcirculation, cytokine release, and systemic alterations in the colon ascendens stent peritonitis (CASP), a model of polymicrobial abdominal sepsis.

Methods: For KC depletion clodronate liposomes were injected 24 h before CASP surgery in female C57BL/6N mice.

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Purpose: Major surgery can modulate the immune system and by this the clinical course of following complications. Effects of minor surgical treatments on the immune system and septic complications are poorly understood.

Materials And Methods: We investigated the effect of a minor surgical procedure--the implantation of an osmotic pump--on the outcome of experimental polymicrobial sepsis (colon ascendens stent-induced peritonitis, CASP) in mice.

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Background: Resident tissue macrophages exert important functions during severe systemic infection and contribute to changes in local as well as systemic immune responses. Alveolar macrophages (AM) play a crucial role in airway diseases and in the defense against microorganisms invading the body via the bronchopulmonary tract. It has been postulated that AM are involved in the development of acute local disorders as a consequence of extrapulmonary stimuli like pancreatitis, peritonitis, or trauma.

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CC chemokine receptor 4 (CCR4) and its two ligands, CCL17 and CCL22, are critically involved in different immune processes. In models of lipopolysaccharide-induced shock, CCR4-deficient (CCR4(-/-)) mice showed improved survival rates associated with attenuated proinflammatory cytokine release. Using CCR4(-/-) mice with a C57BL/6 background, this study describes for the first time the role of CCR4 in a murine model of polymicrobial abdominal sepsis, the colon ascendens stent peritonitis (CASP).

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Objective: In this study, we analyzed seasonal variations of immunoreactivity using a model of septic shock and a model of immunosuppression induced by chronic stress in mice.

Design: Retrospective comparative study using animals of experiments performed between 2001 and 2006 to identify seasonal variations in inflammatory responsiveness of mice.

Setting: University-based research laboratory.

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Article Synopsis
  • Septic shock is linked to heart failure, with evidence suggesting the NO-cGMP pathway plays a crucial role in its functional consequences.
  • A study showed that MRP5, a high-affinity cGMP export transporter, is significantly reduced in heart tissue during septic shock in murine models, indicating a potential mechanism for heart failure progression.
  • This reduction in MRP5 is associated with increased IL-6 levels, and when cardiomyocytes are exposed to IL-6 or serum from septic mice, MRP5 expression decreases, suggesting a transcriptional mechanism at play.
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Background: The role of the vagal nerve in the autonomic nervous system is widely well known. Recently, an additional function was revealed serving as a connector between the nervous and immune system. This connection is called the "cholinergic inflammatory pathway.

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Abdominal sepsis due to secondary fecal peritonitis following anastomosis insufficiency is a rare but life threatening complication of colorectal surgery. The induction of IFN-gamma by IL-12 is believed to play a key role in sepsis as it promotes antibacterial effector mechanisms such as oxidative burst or nitric oxide induction. The impact of gene deficiency for IL-12 (IL-12p40 KO), oxidative burst (p47(phox) KO), or NO induction (iNOS KO) on the outcome of fecal peritonitis was characterized using the murine Colon Ascendens Stent Peritonitis model (CASP).

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Chronic graft rejection mediated by cellular immune responses still poses a serious clinical problem in transplant surgery. Chemokines coordinate the recruitment of leukocytes in inflammatory and immune responses. Their precise functions in the rejection of allografts are still ill defined.

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Colon ascendens stent peritonitis (CASP) and cecal ligation and puncture (CLP), two animal models designed to closely mimic the clinical course of intra-abdominal sepsis, were compared. In the past, immunomodulatory therapies developed in animal studies failed to be successful in humans. As a consequence, the established animal sepsis models were criticized.

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