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hans-dieter volk

Madlen Loebel, Maren Eckey, Franziska Sotzny, Elisabeth Hahn, Sandra Bauer, Patricia Grabowski, Johannes Zerweck, Pavlo Holenya, Leif G Hanitsch, Kirsten Wittke, Peter Borchmann, Jens-Ulrich Rüffer, Falk Hiepe, Klemens Ruprecht, Uta Behrends, Carola Meindl, Hans-Dieter Volk, Ulf Reimer, Carmen Scheibenbogen
BACKGROUND: Epstein-Barr-Virus (EBV) plays an important role as trigger or cofactor for various autoimmune diseases. In a subset of patients with Chronic Fatigue Syndrome (CFS) disease starts with infectious mononucleosis as late primary EBV-infection, whereby altered levels of EBV-specific antibodies can be observed in another subset of patients. METHODS: We performed a comprehensive mapping of the IgG response against EBV comparing 50 healthy controls with 92 CFS patients using a microarray platform...
2017: PloS One
Thaqif El Khassawna, Alessandro Serra, Christian H Bucher, Ansgar Petersen, Claudia Schlundt, Ireen Könnecke, Deeksha Malhan, Sebastian Wendler, Hanna Schell, Hans-Dieter Volk, Katharina Schmidt-Bleek, Georg N Duda
Bone is a unique organ able to regenerate itself after injuries. This regeneration requires the local interplay between different biological systems such as inflammation and matrix formation. Structural reconstitution is initiated by an inflammatory response orchestrated by the host immune system. However, the individual role of T cells and B cells in regeneration and their relationship to bone tissue reconstitution remain unknown. Comparing bone and fracture healing in animals with and without mature T and B cells revealed the essential role of these immune cells in determining the tissue mineralization and thus the bone quality...
2017: Frontiers in Immunology
Michael Schmueck-Henneresse, Bilal Omer, Thomas Shum, Haruko Tashiro, Maksim Mamonkin, Natalia Lapteva, Sandhya Sharma, Lisa Rollins, Gianpietro Dotti, Petra Reinke, Hans-Dieter Volk, Cliona M Rooney
The outcome of therapy with chimeric Ag receptor (CAR)-modified T cells is strongly influenced by the subset origin of the infused T cells. However, because polyclonally activated T cells acquire a largely CD45RO(+)CCR7(-) effector memory phenotype after expansion, regardless of subset origin, it is impossible to know which subsets contribute to the final T cell product. To determine the contribution of naive T cell, memory stem T cell, central memory T cell, effector memory T cell, and terminally differentiated effector T cell populations to the CD3 and CD28-activated CAR-modified T cells that we use for therapy, we followed the fate and function of individually sorted CAR-modified T cell subsets after activation with CD3 and CD28 Abs (CD3/28), transduction and culture alone, or after reconstitution into the relevant subset-depleted population...
July 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
Naima Souidi, Meaghan Stolk, Juliane Rudeck, Dirk Strunk, Katharina Schallmoser, Hans-Dieter Volk, Martina Seifert
Regeneration of injured tissues requires effective therapeutic strategies supporting vasculogenesis. The lack of instantly available autologous cell sources and immunogenicity of allogeneic endothelial (progenitor) cells limits clinical progress. Based on the immunosuppressive potency of mesenchymal stem/progenitor cells (MSCs), we investigated whether crosstalk between endothelial colony-forming progenitor cells (ECFCs) and MSCs during vasculogenesis could lower allogeneic T cell responses against ECFCs allowing long-term engraftment in vivo...
May 2017: Stem Cells
F Andrea Sass, Katharina Schmidt-Bleek, Agnes Ellinghaus, Sebastian Filter, Alexander Rose, Bernd Preininger, Simon Reinke, Sven Geissler, Hans-Dieter Volk, Georg N Duda, Anke Dienelt
Controlled revascularization and inflammation are key elements regulating endogenous regeneration after (bone) tissue trauma. Peripheral blood-derived cell subsets, such as regulatory T-helper cells and circulating (endothelial) progenitor cells, respectively, can support endogenous tissue healing, whereas effector T cells that are associated with an aged immune system can hinder bone regeneration. CD31 is expressed by diverse leukocytes and is well recognized as a marker of circulating endothelial (precursor) cells; however, CD31 is absent from the surface of differentiated effector T cells...
May 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
Athanasia Tsaousi, Ellen Witte, Katrin Witte, Hans-Joachim Röwert-Huber, Hans-Dieter Volk, Wolfram Sterry, Kerstin Wolk, Sylke Schneider-Burrus, Robert Sabat
Acne inversa (AI; also designated as hidradenitis suppurativa) is a chronic inflammatory disease with still unknown pathogenesis that affects the intertriginous skin of perianal, inguinal, and axillary sites. It leads to painful nodules, abscesses, and fistulas with malodorous secretion and is frequently associated with metabolic alterations. Here, we demonstrate that one of the most highly upregulated molecules in AI lesions is matrix metalloproteinase 8 (MMP8), an enzyme specialized in the degradation of extracellular matrix components and the HDL component apolipoprotein A-I...
2016: Mediators of Inflammation
M Abou-El-Enein, H-D Volk, P Reinke
Cellular therapies have potential to treat a wide range of diseases with autologous immunotherapies showing unprecedented therapeutic promise in clinical trials. Such therapies are mainly developed by academic researchers applying small-scale production, targeting rare and unmet medical needs. Here, we highlight the clinical translation of immunotherapy product in an academic setting, which may serve as a success model for early academic development of cell-based therapeutics.
January 2017: Clinical Pharmacology and Therapeutics
Alberto Sada Japp, Kerstin Hoffmann, Stephan Schlickeiser, Rainer Glauben, Christos Nikolaou, Holden T Maecker, Julian Braun, Nadine Matzmohr, Birgit Sawitzki, Britta Siegmund, Andreas Radbruch, Hans-Dieter Volk, Marco Frentsch, Desiree Kunkel, Andreas Thiel
A great part of our knowledge on mammalian immunology has been established in laboratory settings. The use of inbred mouse strains enabled controlled studies of immune cell and molecule functions in defined settings. These studies were usually performed in specific-pathogen free (SPF) environments providing standardized conditions. In contrast, mammalians including humans living in their natural habitat are continuously facing pathogen encounters throughout their life. The influences of environmental conditions on the signatures of the immune system and on experimental outcomes are yet not well defined...
January 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
Mohamed Abou-El-Enein, Gerhard Bauer, Nicholas Medcalf, Hans-Dieter Volk, Petra Reinke
Cell therapies, especially autologous therapies, pose significant challenges to researchers who wish to move from small, probably academic, methods of manufacture to full commercial scale. There is a dearth of reliable information about the costs of operation, and this makes it difficult to predict with confidence the investment needed to translate the innovations to the clinic, other than as small-scale, clinician-led prescriptions. Here, we provide an example of the results of a cost model that takes into account the fixed and variable costs of manufacture of one such therapy...
August 2016: Cytotherapy
Leif G Hanitsch, Madlen Löbel, Jan Florian Mieves, Sandra Bauer, Nina Babel, Brunhilde Schweiger, Kirsten Wittke, Patricia Grabowski, Hans-Dieter Volk, Carmen Scheibenbogen
BACKGROUND: Immunization against seasonal influenza with inactivated vaccine is recommended for patients with common variable immunodeficiency (CVID). However, humoral vaccine response in CVID patients is frequently impaired and current knowledge on T cell vaccine response in CVID and other patients with antibody deficiency is poor. OBJECTIVE: In the present study, we comparatively analyzed the antibody and T cellular immune response of patients with CVID and unclassified antibody deficiency to influenza vaccination in the season 2013-2014...
May 5, 2016: Vaccine
Marije Baas, Alix Besançon, Tania Goncalves, Fabrice Valette, Hideo Yagita, Birgit Sawitzki, Hans-Dieter Volk, Emmanuelle Waeckel-Enée, Benedita Rocha, Lucienne Chatenoud, Sylvaine You
CD8(+) T cell anergy is a critical mechanism of peripheral tolerance, poorly investigated in response to immunotherapy. Here, using a pancreatic islet allograft model and CD3 antibody therapy, we showed, by single cell gene profiling, that intragraft CD8(+) lymphocytes coexpressing granzyme B and perforin were selectively depleted through the Fas/FasL pathway. This step led to long-standing anergy of the remaining CD8(+) T cells marked by the absence of cytotoxic/inflammatory gene expression also confirmed by transcriptome analysis...
January 29, 2016: ELife
Ellen Witte, Georgios Kokolakis, Katrin Witte, Katarzyna Warszawska, Markus Friedrich, Demetrios Christou, Stefan Kirsch, Wolfram Sterry, Hans-Dieter Volk, Robert Sabat, Kerstin Wolk
UNLABELLED: Psoriasis is considered as a model for chronic immune-mediated disorders. Th17-cells are pivotal players in those diseases. Recently, we demonstrated that Th17-cells produce interleukin (IL)-29 and that IL-29 is highly present in psoriatic lesions. Whether IL-29, with its action on epithelial cells and melanocytes, contributes to psoriasis pathogenesis, was unknown so far. Analysis of IL-29-treated human keratinocytes revealed induction of the chemokines CXCL10, CXCL11, and, to a much lesser extent, CXCL9...
April 2016: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
Odilo Engel, Levent Akyüz, Andrey C da Costa Goncalves, Katarzyna Winek, Claudia Dames, Mareike Thielke, Susanne Herold, Chotima Böttcher, Josef Priller, Hans Dieter Volk, Ulrich Dirnagl, Christian Meisel, Andreas Meisel
BACKGROUND AND PURPOSE: Temporary immunosuppression has been identified as a major risk factor for the development of pneumonia after acute central nervous system injury. Although overactivation of the sympathetic nervous system was previously shown to mediate suppression of systemic cellular immune responses after stroke, the role of the parasympathetic cholinergic anti-inflammatory pathway in the antibacterial defense in lung remains largely elusive. METHODS: The middle cerebral artery occlusion model in mice was used to examine the influence of the parasympathetic nervous system on poststroke immunosuppression...
November 2015: Stroke; a Journal of Cerebral Circulation
Sabrina Guenther, Madlen Loebel, Agnes A Mooslechner, Michael Knops, Leif G Hanitsch, Patricia Grabowski, Kirsten Wittke, Christian Meisel, Nadine Unterwalder, Hans-Dieter Volk, Carmen Scheibenbogen
Chronic fatigue syndrome (CFS) is a severe disease characterized by various symptoms of immune dysfunction. CFS onset is typically with an infection and many patients suffer from frequently recurrent viral or bacterial infections. Immunoglobulin and mannose binding lectin (MBL) deficiency are frequent causes for increased susceptibility to infections. In this study we retrospectively analysed 300 patients with CFS for immunoglobulin and MBL levels, and B-cell subset frequencies. 25% of the CFS patients had decreased serum levels of at least one antibody class or subclass with IgG3 and IgG4 subclass deficiencies as most common phenotypes...
October 2015: Human Immunology
Katrin Witte, Egon Koch, Hans-Dieter Volk, Kerstin Wolk, Robert Sabat
Pelargonium sidoides is a medical herb and respective extracts are used very frequently for the treatment of respiratory tract infections. However, the effects of Pelargonium sidoides and a special extract prepared from its roots (EPs 7630) on human immune cells are not fully understood. Here we demonstrate that EPs 7630 induced a rapid and dose-dependent production of TNF-α, IL-6, and IL-10 by human blood immune cells. This EPs 7630-induced cytokine profile was more pro-inflammatory in comparison with the profile induced by viral or bacterial infection-mimicking agents...
2015: PloS One
Madlen Loebel, Patricia Grabowski, Harald Heidecke, Sandra Bauer, Leif G Hanitsch, Kirsten Wittke, Christian Meisel, Petra Reinke, Hans-Dieter Volk, Øystein Fluge, Olav Mella, Carmen Scheibenbogen
Infection-triggered disease onset, chronic immune activation and autonomic dysregulation in CFS point to an autoimmune disease directed against neurotransmitter receptors. Autoantibodies against G-protein coupled receptors were shown to play a pathogenic role in several autoimmune diseases. Here, serum samples from a patient cohort from Berlin (n=268) and from Bergen with pre- and post-treatment samples from 25 patients treated within the KTS-2 rituximab trial were analysed for IgG against human α and β adrenergic, muscarinic (M) 1-5 acetylcholine, dopamine, serotonin, angiotensin, and endothelin receptors by ELISA and compared to a healthy control cohort (n=108)...
February 2016: Brain, Behavior, and Immunity
Hong Lei, Katharina Schmidt-Bleek, Anke Dienelt, Petra Reinke, Hans-Dieter Volk
Regulatory T cells (Tregs) offer new immunotherapeutic options to control undesired immune reactions, such as those in transplant rejection and autoimmunity. In addition, tissue repair and regeneration depend on a multitude of tightly regulated immune and non-immune cells and signaling molecules. There is mounting evidence that adequate innate responses, and even more importantly balanced adaptive immune responses, are key players in the tissue repair and regeneration processes, even in absence of any immune-related disease or infection...
2015: Frontiers in Pharmacology
Angela Mensen, Torben Krause, Leif Gunnar Hanitsch, Christian Meisel, Maximilian E Kleint, Hans-Dieter Volk, Il-Kang Na, Carmen Scheibenbogen
Primary selective IgM deficiency (sIgM) is characterized by diminished serum IgM, infections and autoimmunity. Although there is some evidence of B-cell defects the pathogenesis of sIgM is poorly understood. We determined peripheral B-cell subsets and IgM-expression levels in 31 adult sIgM patients by flow cytometry. In a subset of patients B-cell subset alterations and antibody-secreting cells were determined by flow cytometry and ELISpot assay after in vitro differentiation.Patients had significantly increased transitional, decreased IgM only, switched and non-switched memory B cells and decreased membrane IgM-expression levels on memory B-cell subsets compared to healthy controls...
December 2015: Clinical Immunology: the Official Journal of the Clinical Immunology Society
Madlen Löbel, Agnes Anna Mooslechner, Sandra Bauer, Sabrina Günther, Anne Letsch, Leif G Hanitsch, Patricia Grabowski, Christian Meisel, Hans-Dieter Volk, Carmen Scheibenbogen
BACKGROUND: Chronic fatigue syndrome (CFS) is considered as a neuroimmunological disease but the etiology and pathophysiology is poorly understood. Patients suffer from sustained exhaustion, cognitive impairment and an increased sensitivity to pain and sensory stimuli. A subset of patients has frequent respiratory tract infections (RRTI). Dysregulation of the sympathetic nervous system and an association with genetic variations in the catechol-O-methyltransferase (COMT) and glucocorticoid receptor genes influencing sympathetic and glucocorticoid metabolism were reported in CFS...
2015: Journal of Translational Medicine
Christine Consentius, Petra Reinke, Hans-Dieter Volk
Mesenchymal stromal cells (MSC) are promising candidates for supporting regeneration and suppressing undesired immune reactivity. Although autologous MSC have been most commonly used for clinical trials, data on application of allogeneic MHC-unmatched MSC were reported. The usage of MSC as an 'off-the-shelf' product would have several advantages; however, it is an immunological challenge. The preclinical studies on the (non)immunogenicity of MSC are contradictory and, unfortunately, solid data from clinical trials are missing...
2015: Regenerative Medicine
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