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  1. Book ; Thesis: Über die Pathogenität der mitochondrialen Punktmutation m.5789T>C

    Hippen, Marius Emil Friedrich

    2023  

    Author's details Marius Emil Friedrich Hippen
    Subject code 610
    Language German
    Size 89 Seiten, Illustrationen, 22 cm
    Publishing place Bonn
    Publishing country Germany
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Dissertation, Rheinische Friedrich-Wilhelms-Universität Bonn, 2023
    HBZ-ID HT030727496
    Database Catalogue ZB MED Medicine, Health

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  2. Article ; Online: Twisted [C

    Spahr, Dominik / Bayarjargal, Lkhamsuren / Haussühl, Eiken / Luchitskaia, Rita / Friedrich, Alexandra / Milman, Victor / Fedotenko, Timofey / Winkler, Björn

    Chemical communications (Cambridge, England)

    2023  Volume 59, Issue 80, Page(s) 11951–11954

    Abstract: The inorganic pyrocarbonate salt Ba[C ...

    Abstract The inorganic pyrocarbonate salt Ba[C
    Language English
    Publishing date 2023-10-05
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d3cc03324d
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Supramolecular Double Helices from Small C

    Lafleur, René P M / Herziger, Svenja / Schoenmakers, Sandra M C / Keizer, Arthur D A / Jahzerah, Jahaziel / Thota, Bala N S / Su, Lu / Bomans, Paul H H / Sommerdijk, Nico A J M / Palmans, Anja R A / Haag, Rainer / Friedrich, Heiner / Böttcher, Christoph / Meijer, E W

    Journal of the American Chemical Society

    2020  Volume 142, Issue 41, Page(s) 17644–17652

    Abstract: Supramolecular fibers in water, micrometers long and several nanometers in width, are among the most studied nanostructures for biomedical applications. These supramolecular polymers are formed through a spontaneous self-assembly process of small ... ...

    Abstract Supramolecular fibers in water, micrometers long and several nanometers in width, are among the most studied nanostructures for biomedical applications. These supramolecular polymers are formed through a spontaneous self-assembly process of small amphiphilic molecules by specific secondary interactions. Although many compounds do not possess a stereocenter, recent studies suggest the (co)existence of helical structures, albeit in racemic form. Here, we disclose a series of supramolecular (co)polymers based on water-soluble benzene-1,3,5-tricarboxamides (BTAs) that form double helices, fibers that were long thought to be chains of single molecules stacked in one dimension (1D). Detailed cryogenic transmission electron microscopy (cryo-TEM) studies and subsequent three-dimensional-volume reconstructions unveiled helical repeats, ranging from 15 to 30 nm. Most remarkable, the pitch can be tuned through the composition of the copolymers, where two different monomers with the same core but different peripheries are mixed in various ratios. Like in lipid bilayers, the hydrophobic shielding in the aggregates of these disc-shaped molecules is proposed to be best obtained by dimer formation, promoting supramolecular double helices. It is anticipated that many of the supramolecular polymers in water will have a thermodynamic stable structure, such as a double helix, although small structural changes can yield single stacks as well. Hence, it is essential to perform detailed analyses prior to sketching a molecular picture of these 1D fibers.
    Language English
    Publishing date 2020-09-29
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.0c08179
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Elements of the C-terminal tail of a C-terminal domain homolog of the Orange Carotenoid Protein determining xanthophyll uptake from liposomes.

    Likkei, Kristina / Moldenhauer, Marcus / Tavraz, Neslihan N / Egorkin, Nikita A / Slonimskiy, Yury B / Maksimov, Eugene G / Sluchanko, Nikolai N / Friedrich, Thomas

    Biochimica et biophysica acta. Bioenergetics

    2024  Volume 1865, Issue 3, Page(s) 149043

    Abstract: ... from membranes, or accepts it from homologs of its C-terminal domain (CTDH). The CTDH from Anabaena (AnaCTDH) was ... shown to be important for carotenoid transfer and delivery from/to membranes. The C-terminal tail ...

    Abstract Carotenoids perform multifaceted roles in life ranging from coloration over light harvesting to photoprotection. The Orange Carotenoid Protein (OCP), a light-driven photoswitch involved in cyanobacterial photoprotection, accommodates a ketocarotenoid vital for its function. OCP extracts its ketocarotenoid directly from membranes, or accepts it from homologs of its C-terminal domain (CTDH). The CTDH from Anabaena (AnaCTDH) was shown to be important for carotenoid transfer and delivery from/to membranes. The C-terminal tail of AnaCTDH is a critical structural element likely serving as a gatekeeper and facilitator of carotenoid uptake from membranes. We investigated the impact of amino acid substitutions within the AnaCTDH-CTT on echinenone and canthaxanthin uptake from DOPC and DMPG liposomes. The transfer rate was uniformly reduced for substitutions of Arg-137 and Arg-138 to Gln or Ala, and depended on the lipid type, indicating a weaker interaction particularly with the lipid head group. Our results further suggest that Glu-132 has a membrane-anchoring effect on the PC lipids, specifically at the choline motif as inferred from the strongly different effects of the CTT variants on the extraction from the two liposome types. The substitution of Pro-130 by Gly suggests that the CTT is perpendicular to both the membrane and the main AnaCTDH protein during carotenoid extraction. Finally, the simultaneous mutation of Leu-133, Leu-134 and Leu-136 for alanines showed that the hydrophobicity of the CTT is crucial for carotenoid uptake. Since some substitutions accelerated carotenoid transfer into AnaCTDH while others slowed it down, carotenoprotein properties can be engineered toward the requirements of applications.
    Language English
    Publishing date 2024-03-23
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 60-7
    ISSN 1879-2650 ; 1879-2596 ; 1879-260X ; 1872-8006 ; 1879-2642 ; 1879-2618 ; 0006-3002 ; 0005-2728 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4889 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399
    ISSN (online) 1879-2650 ; 1879-2596 ; 1879-260X ; 1872-8006 ; 1879-2642 ; 1879-2618
    ISSN 0006-3002 ; 0005-2728 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4889 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399
    DOI 10.1016/j.bbabio.2024.149043
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: C-terminal variants in CDC42 drive type I interferon-dependent autoinflammation in NOCARH syndrome reversible by ruxolitinib.

    Kapp, Friedrich G / Kretschmer, Stefanie / Beckmann, Cora C A / Wäsch, Lena / Molitor, Anne / Carapito, Raphaël / Schubert, Mario / Lucas, Nadja / Conrad, Solène / Poignant, Sylvaine / Isidor, Bertrand / Rohlfs, Meino / Kisaarslan, Ayşenur Paç / Schanze, Denny / Zenker, Martin / Schmitt-Graeff, Annette / Strahm, Brigitte / Peters, Anke / Yoshimi, Ayami /
    Driever, Wolfgang / Zillinger, Thomas / Günther, Claudia / Maharana, Shovamayee / Guan, Kaomei / Klein, Christoph / Ehl, Stephan / Niemeyer, Charlotte M / Unal, Ekrem / Bahram, Seiamak / Hauck, Fabian / Lee-Kirsch, Min Ae / Speckmann, Carsten

    Clinical immunology (Orlando, Fla.)

    2023  Volume 256, Page(s) 109777

    Abstract: C-terminal variants in CDC42 encoding cell division control protein 42 homolog underlie neonatal ...

    Abstract C-terminal variants in CDC42 encoding cell division control protein 42 homolog underlie neonatal-onset cytopenia, autoinflammation, rash, and hemophagocytic lymphohistiocytosis (NOCARH). Pyrin inflammasome hyperactivation has been shown to contribute to disease pathophysiology. However, mortality of NOCARH patients remains high despite inflammasome-focused treatments. Here, we demonstrate in four NOCARH patients from three families that cell-intrinsic activation of type I interferon (IFN) is a previously unrecognized driver of autoinflammation in NOCARH. Our data show that aberrant innate immune activation is caused by sensing of cytosolic nucleic acids released from mitochondria, which exhibit disturbances in integrity and dynamics due to CDC42 dysfunction. In one of our patients, treatment with the Janus kinase inhibitor ruxolitinib led to complete remission, indicating that inhibition of type I IFN signaling may have an important role in the management of autoinflammation in patients with NOCARH.
    MeSH term(s) Humans ; Infant, Newborn ; cdc42 GTP-Binding Protein ; Inflammasomes/genetics ; Interferon Type I ; Lymphohistiocytosis, Hemophagocytic/etiology ; Nitriles ; Syndrome
    Chemical Substances cdc42 GTP-Binding Protein (EC 3.6.5.2) ; Inflammasomes ; Interferon Type I ; Nitriles ; ruxolitinib (82S8X8XX8H) ; CDC42 protein, human (EC 3.6.5.2)
    Language English
    Publishing date 2023-09-22
    Publishing country United States
    Document type Case Reports ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1459903-x
    ISSN 1521-7035 ; 1521-6616
    ISSN (online) 1521-7035
    ISSN 1521-6616
    DOI 10.1016/j.clim.2023.109777
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Book ; Online: HoLLiE C -- A Multifunctional Bimanual Mobile Robot Supporting Versatile Care Applications

    Steffen, Lea / Schulze, Martin / Eichmann, Christian / Koch, Robin / Hermann, Andreas / Mussulin, Rosa Frietsch / Graaf, Friedrich / Wilbrandt, Robert / Besselmann, Marvin Große / Roennau, Arne / Dillmann, Rüdiger

    2023  

    Abstract: Care robotics as a research field has developed a lot in recent years, driven by the rapidly increasing need for it. However, these technologies are mostly limited to a very concrete and usually relatively simple use case. The bimanual robot House of ... ...

    Abstract Care robotics as a research field has developed a lot in recent years, driven by the rapidly increasing need for it. However, these technologies are mostly limited to a very concrete and usually relatively simple use case. The bimanual robot House of Living Labs intelligent Escort (HoLLiE) includes an omnidirectional mobile platform. This paper presents how HoLLiE is adapted, by flexible software and hardware modules, for different care applications. The design goal of HoLLiE was to be human-like but abstract enough to ensure a high level of acceptance, which is very advantageous for its use in hospitals. After a short retrospect of previous generations of HoLLiE, it is highlighted how the current version is equipped with a variety of additional sensors and actuators to allow a wide range of possible applications. Then, the software stack of HoLLiE is depicted, with the focus on navigation and force sensitive intention recognition.

    Comment: 18th international conference on Intelligent Autonomous Systems (IAS18 - 2023)
    Keywords Computer Science - Robotics
    Subject code 629
    Publishing date 2023-12-11
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Missense variant c.1460 T > C (p.L487P) enhances protein degradation of ER mannosyltransferase ALG9 in two new ALG9-CDG patients presenting with West syndrome and review of the literature.

    Himmelreich, Nastassja / Dimitrov, Bianca / Zielonka, Matthias / Hüllen, Andreas / Hoffmann, Georg Friedrich / Juenger, Hendrik / Müller, Herbert / Lorenz, Imke / Busse, Birgit / Marschall, Christoph / Schlüter, Gregor / Thiel, Christian

    Molecular genetics and metabolism

    2022  Volume 136, Issue 4, Page(s) 274–281

    Abstract: ... homozygous missense variant c.1460 T > C (p.L487P) in the ALG9 gene which led to global developmental delay ...

    Abstract ALG9-CDG is a CDG-I defect within the group of Congenital Disorders of Glycosylation (CDG). We here describe the clinical symptoms of two new and unrelated ALG9-CDG patients, both carrying the novel homozygous missense variant c.1460 T > C (p.L487P) in the ALG9 gene which led to global developmental delay, psychomotor disability, facial dysmorphisms, brain and heart defects, hearing loss, hypotonia, as well as feeding problems. New clinical symptoms comprised West syndrome with hypsarrhythmia. Quantitative RT-PCR analysis revealed a significantly enhanced ALG9 mRNA transcript level, whereas the protein amount in fibroblasts was significantly reduced. This could be ascribed to a stronger degradation of the mutated ALG9 protein in patient fibroblasts. Lipid-linked oligosaccharide analysis showed an ALG9-CDG characteristic accumulation of Man
    MeSH term(s) Congenital Disorders of Glycosylation/genetics ; Humans ; Infant ; Male ; Mannosyltransferases/genetics ; Membrane Proteins/genetics ; Proteolysis ; Spasms, Infantile/genetics
    Chemical Substances Membrane Proteins ; ALG9 protein, human (EC 2.4.1.-) ; Mannosyltransferases (EC 2.4.1.-)
    Language English
    Publishing date 2022-06-26
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 1418518-0
    ISSN 1096-7206 ; 1096-7192
    ISSN (online) 1096-7206
    ISSN 1096-7192
    DOI 10.1016/j.ymgme.2022.06.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: The addition of arginine deiminase potentiates Mithramycin A-induced cell death in patient-derived glioblastoma cells via ATF4 and cytochrome C.

    Linke, Charlotte / Freitag, Thomas / Riess, Christin / Scheffler, Jana Vanessa / Del Moral, Katharina / Schoenwaelder, Nina / Fiedler, Tomas / Fiebig, Adina / Kaps, Philipp / Dubinski, Daniel / Schneider, Björn / Bergmann, Wendy / Classen, Carl Friedrich / Maletzki, Claudia

    Cancer cell international

    2023  Volume 23, Issue 1, Page(s) 38

    Abstract: ... swollen and had a more pronounced cortically formed cytoskeleton. Also, cytochrome C and ...

    Abstract Background: Arginine auxotrophy constitutes a shortcoming for ~ 30% of glioblastoma multiforme (GBM). Indeed, arginine-depleting therapy using arginine deiminase from Streptococcus pyogenes (SpyADI) has proven activity against GBM in preclinical studies. The good safety profile of SpyADI renders this agent an ideal combination partner for cytostatic therapy.
    Methods: In this study, we combined the antineoplastic antibiotic Mithramycin A (MitA) with SpyADI to boost single-agent activity and analyzed underlying response mechanisms in-depth.
    Results: MitA monotherapy induced a time- and dose-dependent cytotoxicity in eight patient-derived GBM cell lines and had a radiosensitizing effect in all but one cell line. Combination treatment boosted the effects of the monotherapy in 2D- and 3D models. The simultaneous approach was superior to the sequential application and significantly impaired colony formation after repetitive treatment. MitA monotherapy significantly inhibited GBM invasiveness. However, this effect was not enhanced in the combination. Functional analysis identified SpyADI-triggered senescence induction accompanied by increased mitochondrial membrane polarization upon mono- and combination therapy. In HROG63, induction of lysosomes was seen after both monotherapies, indicative of autophagy. These cells seemed swollen and had a more pronounced cortically formed cytoskeleton. Also, cytochrome C and endoplasmatic reticulum-stress-associated proteins ATF4 and Calnexin were enhanced in the combination, contributing to apoptosis. Notably, no significant increases in glioma-stemness marker were seen.
    Conclusions: Therapeutic utilization of a metabolic defect in GBM along with cytostatic therapy provides a novel combination approach. Whether this SpyADI/MitA regimen will provide a safe alternative to combat GBM, will have to be addressed in subsequent (pre-)clinical trials.
    Language English
    Publishing date 2023-02-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 2091573-1
    ISSN 1475-2867
    ISSN 1475-2867
    DOI 10.1186/s12935-023-02873-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Histopathology-validated lesion detection rates of clinically significant prostate cancer with mpMRI, [ 68 Ga]PSMA-11-PET and [ 11 C]Acetate-PET.

    Sandgren, Kristina / Strandberg, Sara N / Jonsson, Joakim H / Grefve, Josefine / Keeratijarut Lindberg, Angsana / Nilsson, Erik / Bergh, Anders / Söderkvist, Karin / Thellenberg Karlsson, Camilla / Friedrich, Bengt / Widmark, Anders / Blomqvist, Lennart / Berg Loegager, Vibeke / Axelsson, Jan / Ögren, Mattias / Ögren, Margareta / Nyholm, Tufve / Riklund, Katrine

    Nuclear medicine communications

    2023  Volume 44, Issue 11, Page(s) 997–1004

    Abstract: ... PSMA-11-PET (PSMA)-PET, [ 11 C]Acetate (ACE)-PET, and mpMRI with histopathology as reference ...

    Abstract Objective: PET/CT and multiparametric MRI (mpMRI) are important diagnostic tools in clinically significant prostate cancer (csPC). The aim of this study was to compare csPC detection rates with [ 68 Ga]PSMA-11-PET (PSMA)-PET, [ 11 C]Acetate (ACE)-PET, and mpMRI with histopathology as reference, to identify the most suitable imaging modalities for subsequent hybrid imaging. An additional aim was to compare inter-reader variability to assess reproducibility.
    Methods: During 2016-2019, all study participants were examined with PSMA-PET/mpMRI and ACE-PET/CT prior to radical prostatectomy. PSMA-PET, ACE-PET and mpMRI were evaluated separately by two observers, and were compared with histopathology-defined csPC. Statistical analyses included two-sided McNemar test and index of specific agreement.
    Results: Fifty-five study participants were included, with 130 histopathological intraprostatic lesions >0.05 cc. Of these, 32% (42/130) were classified as csPC with ISUP grade ≥2 and volume >0.5 cc. PSMA-PET and mpMRI showed no difference in performance ( P  = 0.48), with mean csPC detection rate of 70% (29.5/42) and 74% (31/42), respectively, while with ACE-PET the mean csPC detection rate was 37% (15.5/42). Interobserver agreement was higher with PSMA-PET compared to mpMRI [79% (26/33) vs 67% (24/38)]. Including all detected lesions from each pair of observers, the detection rate increased to 90% (38/42) with mpMRI, and 79% (33/42) with PSMA-PET.
    Conclusion: PSMA-PET and mpMRI showed high csPC detection rates and superior performance compared to ACE-PET. The interobserver agreement indicates higher reproducibility with PSMA-PET. The combined result of all observers in both PSMA-PET and mpMRI showed the highest detection rate, suggesting an added value of a hybrid imaging approach.
    Language English
    Publishing date 2023-08-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 758141-5
    ISSN 1473-5628 ; 0143-3636
    ISSN (online) 1473-5628
    ISSN 0143-3636
    DOI 10.1097/MNM.0000000000001743
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: 13 C-Methacetin Breath Test Predicts Survival in Patients With Hepatocellular Carcinoma Undergoing Transarterial Chemoembolization.

    Gairing, Simon Johannes / Kuchen, Robert / Müller, Lukas / Cankaya, Alper / Weerts, Jan / Kapucu, Akin / Sachse, Simon / Zimpel, Carolin / Stoehr, Fabian / Pitton, Michael B / Mittler, Jens / Straub, Beate Katharina / Marquardt, Jens Uwe / Schattenberg, Jörn M / Labenz, Christian / Kloeckner, Roman / Weinmann, Arndt / Galle, Peter Robert / Wörns, Marcus-Alexander /
    Foerster, Friedrich

    Clinical and translational gastroenterology

    2022  Volume 13, Issue 10, Page(s) e00529

    Abstract: Introduction: The 13 C-methacetin breath test ( 13 C-MBT) is a dynamic method for assessing liver ... function. This proof-of-concept study aimed to investigate the association between 13 C-MBT values and ... in baseline and 20 in longitudinal analysis. 13 C-MBTs were performed before the first and second TACE session ...

    Abstract Introduction: The 13 C-methacetin breath test ( 13 C-MBT) is a dynamic method for assessing liver function. This proof-of-concept study aimed to investigate the association between 13 C-MBT values and outcomes in patients with hepatocellular carcinoma (HCC) undergoing transarterial chemoembolization (TACE).
    Methods: A total of 30 patients with HCC were prospectively recruited. Of these, 25 were included in baseline and 20 in longitudinal analysis. 13 C-MBTs were performed before the first and second TACE session. Patients were followed for at least 1 year.
    Results: At baseline, the median 13 C-MBT value was 261 μg/kg/hr (interquartile range 159-387). 13 C-MBT, albumin-bilirubin, Child-Pugh, and Model for End-Stage Liver Disease scores were associated with overall survival in extended univariable Cox regression ( 13 C-MBT: standardized hazard ratio [sHR] 0.297, 95% confidence interval [CI] 0.111-0.796; albumin-bilirubin score: sHR 4.051, 95% CI 1.813-9.052; Child-Pugh score: sHR 2.616, 95% CI 1.450-4.719; Model for End-Stage Liver Disease score: sHR 2.781, 95% CI 1.356-5.703). Using a cutoff of 140 μg/kg/hr at baseline, 13 C-MBT was associated with prognosis (median overall survival 28.5 months [95% CI 0.0-57.1] vs 3.5 months [95% CI 0.0-8.1], log-rank P < 0.001). Regarding prediction of 90-day mortality after second 13 C-MBT, the relative change in 13 C-MBT values yielded an area under the receiver-operating characteristic curve of 1.000 ( P = 0.007).
    Discussion: Baseline and longitudinal 13 C-MBT values predict survival of patients with HCC undergoing TACE. The relative change in 13 C-MBT values predicts short-term mortality and may assist in identifying patients who will not benefit from further TACE treatment.
    MeSH term(s) Humans ; Carcinoma, Hepatocellular/diagnosis ; Carcinoma, Hepatocellular/therapy ; Chemoembolization, Therapeutic/methods ; End Stage Liver Disease ; Liver Neoplasms/diagnosis ; Liver Neoplasms/therapy ; Treatment Outcome ; Severity of Illness Index ; Bilirubin ; Albumins ; Breath Tests
    Chemical Substances methacetin (13E468TFHP) ; Bilirubin (RFM9X3LJ49) ; Albumins
    Language English
    Publishing date 2022-10-01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2581516-7
    ISSN 2155-384X ; 2155-384X
    ISSN (online) 2155-384X
    ISSN 2155-384X
    DOI 10.14309/ctg.0000000000000529
    Database MEDical Literature Analysis and Retrieval System OnLINE

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