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Nogova L, Malchers F, Hillmer A, Merkelbach-Bruse S, Pinto A, Woempner C, Riedel R, Scheffler M, Michels S, De Porre P, Santiago-Walker A, Fischer R, Abdulla D, Thomas R, Buettner R, Wolf J. FIND: A phase II study to evaluate the efficacy of erdafitinib in FGFR-altered squamous NSCLC. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz063.082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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27
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Scheffler M, Frank R, Ihle M, Abdulla D, Koleczko S, Nogova L, Holzem A, Chanra T, Riedel R, Michels S, Fischer R, Kron A, Merkelbach-Bruse S, Buettner R, Wolf J. Impact on KRAS-subtypes and TP53 mutations on the prognostic value of KRAS/KEAP1 comutations in non-small cell lung cancer (NSCLC). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz063.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Schmid M, Kachel SR, Klein BP, Bock N, Müller P, Riedel R, Hampp N, Gottfried JM. Reactive metal-organic interfaces studied with hard x-ray photoelectron spectroscopy: controlled formation of metalloporphyrin interphase layers during metal vapor deposition onto porphyrin films. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:094002. [PMID: 30572324 DOI: 10.1088/1361-648x/aafa2b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Interfaces between organic semiconductors and metallic layers are ubiquitous in organic (opto-) electronic devices and can significantly influence their functionality. Here, we studied in situ prepared metal-organic interfaces, which were obtained by vapor deposition of metals (Co, Fe) onto organic semiconductor films (2H-tetraphenylporphyrin), with hard x-ray photoelectron spectroscopy. In these systems, the interphase zones, which are formed by diffusion and reaction of the metal in the organic material, can be clearly distinguished spectroscopically from the unreacted organic bulk, since they comprise the corresponding metalloporphyrins, CoTPP and FeTPP. In order to gain control over the thickness of the interphase layers, we varied process parameters such as sample temperature and metal-atom flux during interface preparation. We found that the temperature of the organic film during metal deposition was the only parameter that significantly influenced the formation of the interphase layers: their thicknesses were typically ~0.5 nm for deposition at 90 K, compared to ~1 nm at 300 K, irrespective of metal atom flux and chemical nature of the metal atom (Fe versus Co). Notably, these values are significantly smaller than the thicknesses of other metal/organics interphase regions reported in the literature.
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Reinhardt H, Peschke P, Riedel R, Hampp N. Mechanically metastable structures generated by single pulse laser-induced periodic surface structures (LIPSS) in the photoresist SU8. NANOTECHNOLOGY 2018; 29:305303. [PMID: 29742067 DOI: 10.1088/1361-6528/aac378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Laser-induced periodic surface structures (LIPSS) with a periodicity of 351 nm are generated in the negative photoresist SU8 by single nanosecond laser pulse impact. Friction scans indicate the periodic pattern to comprise alternating regions of crosslinked and non-crosslinked SU8. Intriguingly, even minor mechanical stimuli in the order of nanonewtons cause the unfolding or rather the deletion of the characteristic periodic pattern similarly to the release of a pre-loaded spring. This feature combined with high resilience to heat and photon irradiation makes SU8-LIPSS attractive for applications such as mechanical stress monitors, self-destructing memory and passive micro actuators.
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Kamrani S, Penther D, Ghasemi A, Riedel R, Fleck C. Microstructural characterization of Mg-SiC nanocomposite synthesized by high energy ball milling. ADV POWDER TECHNOL 2018. [DOI: 10.1016/j.apt.2018.04.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Sun L, Riedel R, Stanciu SG, Yang F, Hampp N, Xu L, Wu A. Investigations on the elasticity of functional gold nanoparticles using single-molecule force spectroscopy. J Mater Chem B 2018; 6:2960-2971. [DOI: 10.1039/c7tb03309e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In this focused review we turn our attention towards several approaches for detecting the elasticity of NPs, systematically summarizing the divergent elasticity values of distinct gold nanoparticles (AuNPs) with different surfaces.
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Maschmeyer P, Petkau G, Siracusa F, Zimmermann J, Zügel F, Kühl AA, Lehmann K, Schimmelpfennig S, Weber M, Haftmann C, Riedel R, Bardua M, Heinz GA, Tran CL, Hoyer BF, Hiepe F, Herzog S, Wittmann J, Rajewsky N, Melchers FG, Chang HD, Radbruch A, Mashreghi MF. Selective targeting of pro-inflammatory Th1 cells by microRNA-148a-specific antagomirs in vivo. J Autoimmun 2017; 89:41-52. [PMID: 29183643 PMCID: PMC5916452 DOI: 10.1016/j.jaut.2017.11.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 11/15/2017] [Accepted: 11/16/2017] [Indexed: 12/02/2022]
Abstract
In T lymphocytes, expression of miR-148a is induced by T-bet and Twist1, and is specific for pro-inflammatory Th1 cells. In these cells, miR-148a inhibits the expression of the pro-apoptotic protein Bim and promotes their survival. Here we use sequence-specific cholesterol-modified oligonucleotides against miR-148a (antagomir-148a) for the selective elimination of pro-inflammatory Th1 cells in vivo. In the murine model of transfer colitis, antagomir-148a treatment reduced the number of pro-inflammatory Th1 cells in the colon of colitic mice by 50% and inhibited miR-148a expression by 71% in the remaining Th1 cells. Expression of Bim protein in colonic Th1 cells was increased. Antagomir-148a-mediated reduction of Th1 cells resulted in a significant amelioration of colitis. The effect of antagomir-148a was selective for chronic inflammation. Antigen-specific memory Th cells that were generated by an acute immune reaction to nitrophenylacetyl-coupled chicken gamma globulin (NP-CGG) were not affected by treatment with antagomir-148a, both during the effector and the memory phase. In addition, antibody titers to NP-CGG were not altered. Thus, antagomir-148a might qualify as an effective drug to selectively deplete pro-inflammatory Th1 cells of chronic inflammation without affecting the protective immunological memory. Th1 cells expressing miR-148a mediate colitis in a murine model of IBD. Antagomir-148a inhibits colitis by selectively depleting Th1 cells from the colon. Antagomir-148a does not affect the protective immunological memory.
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Zimmermann J, Durek P, Kühl AA, Schattenberg F, Maschmeyer P, Siracusa F, Lehmann K, Westendorf K, Weber M, Riedel R, Müller S, Radbruch A, Chang HD. The intestinal microbiota determines the colitis-inducing potential of T-bet-deficient Th cells in mice. Eur J Immunol 2017; 48:161-167. [PMID: 28875499 PMCID: PMC5813160 DOI: 10.1002/eji.201747100] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 07/28/2017] [Accepted: 08/31/2017] [Indexed: 12/16/2022]
Abstract
Conflicting evidence has been provided as to whether induction of intestinal inflammation by adoptive transfer of naïve T cells into Rag-/- mice requires expression of the transcription factor T-bet by the T cells. Here, we formally show that the intestinal microbiota composition of the Rag-/- recipient determines whether or not T-bet-deficient Th cells can induce colitis and we have resolved the differences of the two microbiomes, permissive or non-permissive to T-bet-independent colitis. Our data highlight the dominance of the microbiota over particular T cell differentiation programs in the pathogenesis of chronic intestinal inflammation.
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Kron A, Riedel R, Michels S, Fassunke J, Merkelbach-Bruse S, Scheffler M, Nogova L, Fischer R, Ueckeroth F, Abdulla D, Kron F, Pauli B, Kaminsky B, Braess J, Graeven U, Grohe C, Krueger S, Büttner R, Wolf J. Impact of co-occurring genomic alterations on overall survival of BRAF V600E and non-V600E mutated NSCLC patients: Results of the Network Genomic Medicine. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx380.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Riedel R, Kron A, Michels S, Fassunke J, Scheffler M, Fischer R, Nogova L, Abdulla D, Heydt C, Ueckeroth F, Pauli B, Serke M, Krueger S, Grohe C, Sebastian M, Koschel D, Kambartel KO, Zander T, Büttner R, Wolf J. Impact of next generation TKI and co-occurring mutations in ALK-positive NSCLC patients: Results of the Network Genomic Medicine. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx380.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Zimmermann J, Hübschmann T, Schattenberg F, Schumann J, Durek P, Riedel R, Friedrich M, Glauben R, Siegmund B, Radbruch A, Müller S, Chang HD. High-resolution microbiota flow cytometry reveals dynamic colitis-associated changes in fecal bacterial composition. Eur J Immunol 2017; 46:1300-3. [PMID: 26909672 PMCID: PMC5084791 DOI: 10.1002/eji.201646297] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 02/10/2016] [Accepted: 02/19/2016] [Indexed: 01/27/2023]
Abstract
Using high‐resolution flow cytometry of bacterial shape (forward scatter) and DNA content (DAPI staining), we detected dramatic differences in the fecal microbiota composition during murine colitis that were validated using 16S rDNA sequencing. This innovative method provides a fast and inexpensive tool to interrogate the microbiota on the single‐cell level.
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Yang F, Riedel R, Del Pino P, Pelaz B, Said AH, Soliman M, Pinnapireddy SR, Feliu N, Parak WJ, Bakowsky U, Hampp N. Real-time, label-free monitoring of cell viability based on cell adhesion measurements with an atomic force microscope. J Nanobiotechnology 2017; 15:23. [PMID: 28330480 PMCID: PMC5361698 DOI: 10.1186/s12951-017-0256-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 03/08/2017] [Indexed: 12/27/2022] Open
Abstract
Background The adhesion of cells to an oscillating cantilever sensitively influences the oscillation amplitude at a given frequency. Even early stages of cytotoxicity cause a change in the viscosity of the cell membrane and morphology, both affecting their adhesion to the cantilever. We present a generally applicable method for real-time, label free monitoring and fast-screening technique to assess early stages of cytotoxicity recorded in terms of loss of cell adhesion. Results We present data taken from gold nanoparticles of different sizes and surface coatings as well as some reference substances like ethanol, cadmium chloride, and staurosporine. Measurements were recorded with two different cell lines, HeLa and MCF7 cells. The results obtained from gold nanoparticles confirm earlier findings and attest the easiness and effectiveness of the method. Conclusions The reported method allows to easily adapt virtually every AFM to screen and assess toxicity of compounds in terms of cell adhesion with little modifications as long as a flow cell is available. The sensitivity of the method is good enough indicating that even single cell analysis seems possible. Electronic supplementary material The online version of this article (doi:10.1186/s12951-017-0256-7) contains supplementary material, which is available to authorized users.
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Riedel R, Pérez Pérez A, Maskin B, Jaime M, Parolini O, Sánchez-Margalet V, Varone C, Maymó J. Amniotic membrane conditioned medium promotes cell death and inhibits proliferation of hepatocarcinoma HepG2 cells. Placenta 2017. [DOI: 10.1016/j.placenta.2017.01.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Riedel R, Schmieder A, Koster A, Kim S, Baumgarten G, Schewe JC. [Heparin-induced thrombocytopenia type II (HIT II) : A medical-economic view]. Med Klin Intensivmed Notfmed 2016; 112:334-346. [PMID: 28005139 DOI: 10.1007/s00063-016-0237-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 10/18/2016] [Accepted: 11/06/2016] [Indexed: 11/26/2022]
Abstract
BACKGROUND In the context of inpatient and increasingly ambulatory thrombosis prophylaxis, heparins have been recognised as standard therapy for decades. In addition to the therapeutic benefit, therapy with heparins also entails the risk of undesirable side effects, such as bleeding and thrombocytopenia. Heparin-induced thrombocytopenia (HIT II) is deemed a serious side effect. AIM In the following work, HIT II is subjected to a medico-economic consideration (treatment, pharmaceuticals, subsequent costs due to possible complications) and, with regard to a possible HIT II prophylaxis, aspects of increasingly respected patient safety are also considered. METHODS In the context of a literature search the active ingredients argatroban and danaparoid, which are approved for HIT II treatment, were evaluated. RESULTS HIT II - especially in combination with thromboembolic complications - represents a medical-economic burden for the hospital. Although this is only an orientation guide, it shows that HIT II syndrome is not adequately cost-covered by the G‑DRG system. An early thrombosis prophylaxis with argatroban/danaparoid for HIT II risk patients should therefore be taken into account for medical-related as well as patient safety-relevant aspects. According to experience, the pharmaceutical supply for these medically needed products (anticoagulants) should be ensured for reasons of patient safety. CONCLUSION The risk of an immunological response to heparin therapy is known. Within the context of increased patient safety, thrombosis prophylaxis should be issued with a risk-adjusted prophylaxis.
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Zimmermann J, Kühl AA, Weber M, Grün JR, Löffler J, Haftmann C, Riedel R, Maschmeyer P, Lehmann K, Westendorf K, Mashreghi MF, Löhning M, Mack M, Radbruch A, Chang HD. T-bet expression by Th cells promotes type 1 inflammation but is dispensable for colitis. Mucosal Immunol 2016; 9:1487-1499. [PMID: 26883725 DOI: 10.1038/mi.2016.5] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 01/03/2016] [Indexed: 02/04/2023]
Abstract
The transcription factor T-bet is highly expressed by Th cells isolated from the inflamed intestine of Crohn's disease patients, and has been regarded a critical driver of murine T cell-induced colitis. However, we show here that T-bet expression by Th cells is not required for the manifestation of T-cell-induced colitis in the presence of segmented filamentous bacteria and Helicobacter hepaticus. T-bet expression by Th cells controls their survival and localization, their repertoire of chemokine and chemokine receptor expression, the accumulation of monocytes and macrophages in the inflamed colon, and their differentiation to the M1 type, i.e., type 1 inflammation. Nevertheless, T-bet-deficient Th cells efficiently induce colitis, as reflected by weight loss, diarrhea, and colon histopathology. T-bet-deficient Th cells differentiate into Th1/17 cells, able to express IFN-γ and IL-17A upon restimulation. While neutralization of IL-17A exacerbated colitis induced by wild-type or T-bet-deficient Th cells, neutralization of IFN-γ completely abolished colitis.
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Tap W, Papai Z, van Tine B, Attia S, Ganjoo K, Jones R, Schuetze S, Reed D, Chawla S, Riedel R, Krarup-Hansen A, Italiano A, Hohenberger P, Grignani G, Cranmer L, Alcindor T, Lopez-Pousa A, Pearce T, Kroll S, Schoffski P. Randomized phase 3, multicenter, open-label study comparing evofosfamide (Evo) in combination with doxorubicin (D) vs. D alone in patients (pts) with advanced soft tissue sarcoma (STS): Study TH-CR-406/SARC021. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw388.01] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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43
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Riedel R. European patient's cross-border mobility directive. Public Health 2016; 139:222-223. [DOI: 10.1016/j.puhe.2016.04.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Accepted: 04/27/2016] [Indexed: 11/27/2022]
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del Pino P, Yang F, Pelaz B, Zhang Q, Kantner K, Hartmann R, Martinez de Baroja N, Gallego M, Möller M, Manshian BB, Soenen SJ, Riedel R, Hampp N, Parak WJ. Basic Physicochemical Properties of Polyethylene Glycol Coated Gold Nanoparticles that Determine Their Interaction with Cells. Angew Chem Int Ed Engl 2016; 55:5483-7. [DOI: 10.1002/anie.201511733] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 02/08/2016] [Indexed: 11/06/2022]
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del Pino P, Yang F, Pelaz B, Zhang Q, Kantner K, Hartmann R, Martinez de Baroja N, Gallego M, Möller M, Manshian BB, Soenen SJ, Riedel R, Hampp N, Parak WJ. Basic Physicochemical Properties of Polyethylene Glycol Coated Gold Nanoparticles that Determine Their Interaction with Cells. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511733] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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46
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Lungerich D, Reger D, Hölzel H, Riedel R, Martin MMJC, Hampel F, Jux N. Eine Strategie zur Synthese ungewöhnlicher Hexaarylbenzole im Multigramm‐Maßstab. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600841] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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47
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Lungerich D, Reger D, Hölzel H, Riedel R, Martin MMJC, Hampel F, Jux N. A Strategy towards the Multigram Synthesis of Uncommon Hexaarylbenzenes. Angew Chem Int Ed Engl 2016; 55:5602-5. [DOI: 10.1002/anie.201600841] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Indexed: 11/09/2022]
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48
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Maschmeyer P, Zimmermann J, Tran CL, Haftmann C, Rausch B, Riedel R, Herzog S, Chang HD, Radbruch A, Mashreghi MF. A7.19 Systemic inhibition of MIR-148A by antagomirs reduces CD4 +T helper cell numbers and alleviates inflammation in a preclinical model of transfer colitis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-209124.150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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49
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Lemke A, Kraft M, Roth K, Riedel R, Lammerding D, Hauser AE. Long-lived plasma cells are generated in mucosal immune responses and contribute to the bone marrow plasma cell pool in mice. Mucosal Immunol 2016; 9:83-97. [PMID: 25943272 DOI: 10.1038/mi.2015.38] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2014] [Accepted: 03/24/2015] [Indexed: 02/04/2023]
Abstract
During systemic immune responses, plasma blasts are generated in secondary lymphoid organs and migrate to the bone marrow, where they can become long-lived, being responsible for the maintenance of long-term antibody titers. Plasma blasts generated in mucosal immune responses of the small intestine home to the lamina propria (LP), producing mainly immunoglobulin A. The migration of these antibody-secreting cells is well characterized during acute immune responses. Less is known about their lifetime and contribution to the long-lived bone marrow compartment. Here we investigate the lifetime of plasma cells (PCs) and the relationship between the PC compartments of the gut and bone marrow after oral immunization. Our findings indicate that PCs in the LP can survive for extended time periods. PCs specific for orally administered antigens can be detected in the bone marrow for at least 9 months after immunization, indicating that the mucosal PC compartment can contribute to the long-lived PC pool in this organ, independent of the participation of splenic B cells. Our findings suggest that the compartmentalization between mucosal and systemic PC pools is less strict than previously thought. This may have implications for the development of vaccines as well as for autoantibody-mediated diseases.
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Thiele G, Donsbach C, Riedel R, Marsch M, Harms K, Dehnen S. Smallest molecular chalcogenidometalate anions of the heaviest metals: syntheses, structures, and their interconversion. Dalton Trans 2015; 45:5958-67. [PMID: 26605971 DOI: 10.1039/c5dt03996g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The syntheses of the first molecular meta-selenidomercurate(ii), ortho-telluridothallate(iii) and a hydrate of an ortho-selenidoplubate(iv) are presented alongside an improved and facile synthesis of the selenidobismuthate(iii) with almost quantitative yields. By means of quantum chemical calculations, the energetics of the interconversions of small metalate anions is discussed and the existence of the heaviest homologues of [NO2](-), [NO3](-), [PO4](2-) and [CO3](2-) are predicted.
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