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  1. Article ; Online: Bispecific PD1-IL2v and anti-PD-L1 break tumor immunity resistance by enhancing stem-like tumor-reactive CD8

    Tichet, Mélanie / Wullschleger, Stephan / Chryplewicz, Agnieszka / Fournier, Nadine / Marcone, Rachel / Kauzlaric, Annamaria / Homicsko, Krisztian / Deak, Laura Codarri / Umaña, Pablo / Klein, Christian / Hanahan, Douglas

    Immunity

    2023  Volume 56, Issue 1, Page(s) 162–179.e6

    Abstract: Immunotherapies have shown remarkable, albeit tumor-selective, therapeutic benefits in the clinic. Most patients respond transiently at best, highlighting the importance of understanding mechanisms underlying resistance. Herein, we evaluated the effects ... ...

    Abstract Immunotherapies have shown remarkable, albeit tumor-selective, therapeutic benefits in the clinic. Most patients respond transiently at best, highlighting the importance of understanding mechanisms underlying resistance. Herein, we evaluated the effects of the engineered immunocytokine PD1-IL2v in a mouse model of de novo pancreatic neuroendocrine cancer that is resistant to checkpoint and other immunotherapies. PD1-IL2v utilizes anti-PD-1 as a targeting moiety fused to an immuno-stimulatory IL-2 cytokine variant (IL2v) to precisely deliver IL2v to PD-1
    MeSH term(s) Animals ; Mice ; B7-H1 Antigen/immunology ; CD8-Positive T-Lymphocytes/immunology ; CD8-Positive T-Lymphocytes/metabolism ; Disease Models, Animal ; Immunotherapy/methods ; Macrophages/immunology ; Macrophages/metabolism ; Neoplasms/therapy ; Tumor Microenvironment ; Antibodies, Bispecific/immunology ; Interleukin-2 ; Programmed Cell Death 1 Receptor/immunology
    Chemical Substances B7-H1 Antigen ; Antibodies, Bispecific ; Interleukin-2 ; Programmed Cell Death 1 Receptor
    Language English
    Publishing date 2023-01-09
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1217235-2
    ISSN 1097-4180 ; 1074-7613
    ISSN (online) 1097-4180
    ISSN 1074-7613
    DOI 10.1016/j.immuni.2022.12.006
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Cancer Cells Retrace a Stepwise Differentiation Program during Malignant Progression.

    Saghafinia, Sadegh / Homicsko, Krisztian / Di Domenico, Annunziata / Wullschleger, Stephan / Perren, Aurel / Marinoni, Ilaria / Ciriello, Giovanni / Michael, Iacovos P / Hanahan, Douglas

    Cancer discovery

    2021  Volume 11, Issue 10, Page(s) 2638–2657

    Abstract: Pancreatic neuroendocrine tumors (PanNET) comprise two molecular subtypes, relatively benign islet tumors (IT) and invasive, metastasis-like primary (MLP) tumors. Until now, the origin of aggressive MLP tumors has been obscure. Herein, using multi-omics ... ...

    Abstract Pancreatic neuroendocrine tumors (PanNET) comprise two molecular subtypes, relatively benign islet tumors (IT) and invasive, metastasis-like primary (MLP) tumors. Until now, the origin of aggressive MLP tumors has been obscure. Herein, using multi-omics approaches, we revealed that MLP tumors arise from IT via dedifferentiation following a reverse trajectory along the developmental pathway of islet β cells, which results in the acquisition of a progenitor-like molecular phenotype. Functionally, the miR-181cd cluster induces the IT-to-MLP transition by suppressing expression of the Meis2 transcription factor, leading to upregulation of a developmental transcription factor, Hmgb3. Notably, the IT-to-MLP transition constitutes a distinct step of tumorigenesis and is separable from the classic proliferation-associated hallmark, temporally preceding accelerated proliferation of cancer cells. Furthermore, patients with PanNET with elevated HMGB3 expression and an MLP transcriptional signature are associated with higher-grade tumors and worse survival. Overall, our results unveil a new mechanism that modulates cancer cell plasticity to enable malignant progression. SIGNIFICANCE: Dedifferentiation has long been observed as a histopathologic characteristic of many cancers, albeit inseparable from concurrent increases in cell proliferation. Herein, we demonstrate that dedifferentiation is a mechanistically and temporally separable step in the multistage tumorigenesis of pancreatic islet cells, retracing the developmental lineage of islet β cells.
    MeSH term(s) Animals ; Cell Transformation, Neoplastic ; Disease Models, Animal ; Gene Expression Regulation ; Mice ; Neuroendocrine Tumors/genetics ; Neuroendocrine Tumors/pathology ; Pancreatic Neoplasms/genetics ; Pancreatic Neoplasms/pathology
    Language English
    Publishing date 2021-04-28
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2625242-9
    ISSN 2159-8290 ; 2159-8274
    ISSN (online) 2159-8290
    ISSN 2159-8274
    DOI 10.1158/2159-8290.CD-20-1637
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Book ; Online: Biodiversity and microbial safety of artisanal Malian sour milk fènè and development of adapted starter cultures for controlled production

    Wullschleger, Stephan Markus

    2009  

    Abstract: Diss., Eidgenössische Technische Hochschule ETH Zürich, Nr. 18287, ... ...

    Abstract Diss., Eidgenössische Technische Hochschule ETH Zürich, Nr. 18287, 2009
    Keywords MILCHSÄUERUNG ; SAUERMILCHPRODUKTE UND FERMENTIERTE MILCHPRODUKTE (MILCHPRODUKTION) ; MIKROBIELLE LEBENSMITTELZUSÄTZE ; STARTER- UND SCHUTZKULTUREN (LEBENSMITTELINDUSTRIE) ; MIKROBIOLOGIE VON MILCH UND MILCHPRODUKTEN (MILCHPRODUKTION) ; LEBENSMITTEL-SICHERHEIT + LEBENSMITTEL-ÜBERWACHUNG + LEBENSMITTEL-KONTROLLE + LEBENSMITTEL-CHEMIE (ÖFFENTLICHES GESUNDHEITSWESEN) ; LEBENSMITTELHYGIENE (HUMANERNÄHRUNG) ; MALI (WESTAFRIKA). REPUBLIK MALI
    Language English
    Publisher Zürich, ETH
    Publishing country ch
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: The CD33xCD123xCD70 Multispecific CD3-Engaging DARPin MP0533 Induces Selective T Cell-Mediated Killing of AML Leukemic Stem Cells.

    Bianchi, Matteo / Reichen, Christian / Croset, Amelie / Fischer, Stefanie / Eggenschwiler, Aline / Grübler, Yvonne / Marpakwar, Rajlakshmi / Looser, Thamar / Spitzli, Patricia / Herzog, Christel / Villemagne, Denis / Schiegg, Dieter / Abduli, Liridon / Iss, Chloé / Neculcea, Alexandra / Franchini, Marco / Lekishvili, Tamara / Ragusa, Simone / Zitt, Christof /
    Kaufmann, Yvonne / Auge, Alienor / Hänggi, Martin / Ali, Waleed / Frasconi, Teresa M / Wullschleger, Stephan / Schlegel, Iris / Matzner, Mirela / Lüthi, Ursina / Schlereth, Bernd / Dawson, Keith M / Kirkin, Vladimir / Ochsenbein, Adrian F / Grimm, Sebastian / Reschke, Nina / Riether, Carsten / Steiner, Daniel / Leupin, Nicolas / Goubier, Anne

    Cancer immunology research

    2024  

    Abstract: The prognosis of patients with acute myeloid leukemia (AML) is limited, especially for elderly or unfit patients not eligible for hematopoietic stem cell (HSC) transplantation. The disease is driven by leukemic stem cells (LSCs), which are characterized ... ...

    Abstract The prognosis of patients with acute myeloid leukemia (AML) is limited, especially for elderly or unfit patients not eligible for hematopoietic stem cell (HSC) transplantation. The disease is driven by leukemic stem cells (LSCs), which are characterized by clonal heterogeneity and resistance to conventional therapy. These cells are therefore believed to be a major cause of progression and relapse. We designed MP0533, a multispecific CD3-engaging DARPin (designed ankyrin repeat protein) that can simultaneously bind to three antigens on AML cells (CD33, CD123, and CD70), aiming to enable avidity-driven T cell-mediated killing of AML cells co-expressing at least two of the antigens. In vitro, MP0533 induced selective T cell-mediated killing of AML cell lines, as well as patient-derived AML blasts and LSCs, expressing two or more target antigens, while sparing healthy HSCs, blood, and endothelial cells. The higher selectivity also resulted in markedly lower levels of cytokine release in normal human blood compared to single antigen-targeting T-cell engagers. In xenograft AML mouse models, MP0533 induced tumor-localized T-cell activation and cytokine release, leading to complete eradication of the tumors while having no systemic adverse effects. These studies show that the multispecific-targeting strategy used with MP0533 holds promise for improved selectivity towards LSCs and efficacy against clonal heterogeneity, potentially bringing a new therapeutic option to this group of patients with high unmet need. MP0533 is currently being evaluated in a dose-escalation phase 1 study in patients with relapsed or refractory AML (NCT05673057).
    Language English
    Publishing date 2024-04-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2732489-8
    ISSN 2326-6074 ; 2326-6066
    ISSN (online) 2326-6074
    ISSN 2326-6066
    DOI 10.1158/2326-6066.CIR-23-0692
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Thesis ; Online: Biodiversity and microbial safety of artisanal Malian sour milk fènè and development of adapted starter cultures for controlled production

    Wullschleger, Stephan M.

    2009  

    Keywords MICROBIAL FOOD ADDITIVES ; PROTECTIVE AND STARTER CULTURES (FOOD INDUSTRY) ; MILCHSÄUERUNG ; SAUERMILCHPRODUKTE UND FERMENTIERTE MILCHPRODUKTE (MILCHPRODUKTION) ; LEBENSMITTEL-SICHERHEIT + LEBENSMITTEL-ÜBERWACHUNG + LEBENSMITTEL-KONTROLLE + LEBENSMITTEL-CHEMIE (ÖFFENTLICHES GESUNDHEITSWESEN) ; MIKROBIOLOGIE VON MILCH UND MILCHPRODUKTEN (MILCHPRODUKTION) ; MICROBIOLOGY OF MILK AND MILK PRODUCTS (DAIRYING) ; MILK FERMENTATION ; FERMENTED MILK PRODUCTS ; SOUR MILK PRODUCTS (DAIRYING) ; MIKROBIELLE LEBENSMITTELZUSÄTZE ; STARTER- UND SCHUTZKULTUREN (LEBENSMITTELINDUSTRIE) ; MALI (WESTERN AFRICA). REPUBLIC OF MALI ; LEBENSMITTELHYGIENE (HUMANERNÄHRUNG) ; FOOD HYGIENE + FOOD SANITATION (HUMAN NUTRITION) ; FOOD INSPECTION + FOOD CHEMISTRY + FOOD SAFETY (PUBLIC HEALTH) ; MALI (WESTAFRIKA). REPUBLIK MALI ; info:eu-repo/classification/ddc/660 ; Chemical engineering
    Language English
    Publisher ETH Zürich
    Publishing country ch
    Document type Thesis ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Book ; Online ; Thesis: Biodiversity and microbial safety of artisanal Malian sour milk fènè and development of adapted starter cultures for controlled production

    Wullschleger, Stephan Markus

    2009  

    Author's details by Stephan Markus Wullschleger
    Language English
    Size Online-Ressource (156 S), Ill
    Publisher ETH
    Publishing place Zürich
    Document type Book ; Online ; Thesis
    Thesis / German Habilitation thesis Diss., Eidgenössische Technische Hochschule ETH Zürich, Nr. 18287--Zürich, 1828
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  7. Book ; Online ; Thesis: Biodiversity and microbial safety of artisanal Malian sour milk fènè and development of adapted starter cultures for controlled production

    Wullschleger, Stephan Markus

    2009  

    Author's details by Stephan Markus Wullschleger
    Language English
    Size Online-Ressource (156 S), Ill
    Publisher ETH
    Publishing place Zürich
    Document type Book ; Online ; Thesis
    Thesis / German Habilitation thesis Diss., Eidgenössische Technische Hochschule ETH Zürich, Nr. 18287--Zürich, 1828
    Database Former special subject collection: coastal and deep sea fishing

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  8. Article: Vagococcus teuberi sp. nov., isolated from the Malian artisanal sour milk fènè

    Wullschleger, Stephan / Christoph Jans / Clelia Seifert / Sarah Baumgartner / Christophe Lacroix / Bassirou Bonfoh / Marc J.A. Stevens / Leo Meile

    Systematic and applied microbiology. 2018 Mar., v. 41, no. 2

    2018  

    Abstract: Ten bacterial isolates belonging to the genus Vagococcus were obtained from Malian sour milk fènè produced from spontaneously fermented cow milk. However, these isolates could not be assigned to a species upon initial comparative 16S rRNA gene sequence ... ...

    Abstract Ten bacterial isolates belonging to the genus Vagococcus were obtained from Malian sour milk fènè produced from spontaneously fermented cow milk. However, these isolates could not be assigned to a species upon initial comparative 16S rRNA gene sequence analysis and were therefore further characterized. Rep-PCR fingerprinting of the isolates yielded four strain clusters represented by strains CG-21T (=DSM 21459T), 24CA, CM21 and 9H. Sequence identity of the 16S rRNA gene of DSM 21459T to its closest relative species Vagococcus penaei was 97.9%. Among the four rep strain clusters, DSM 21459T and 24CA shared highest 16S rRNA gene sequence identity of 99.6% while CM21 and 9H shared 98.6–98.8% with DSM 21459T and V. penaei CD276T. DSM 21459T and 24CA were thus subjected to a polyphasic typing approach. The genome of DSM 21459T featured a G+C content of 34.1mol% for a 2.17-bp chromosome and a 15-kbp plasmid. Average nucleotide identity (ANI) of DSM 21459T to Vagococcus fluvialis bH819, V. penaei CD276T were 72.88%, 72.63%, respectively. DNA–DNA hybridization (DDH) similarities of strain DSM 21459T to other Vagococcus species were <42.0%. ANI and DDH findings strongly supported the 16S rRNA gene phylogenetic tree delineations. The fatty acid patterns of DSM 21459T was palmitic acid (C 16:0, 24.5%), oleic acid (C 18:1-ω9c, 32.8%), stearic acid (C 18:0, 18.9%). General physiological characterization of DSM 21459T and 24CA were consistent with those of the genus Vagococcus. Strain DSM 21459T and further strains are therefore considered to belong to a novel species, for which the nomenclature Vagococcus teuberi sp. nov. is proposed. The type strain is named CG-21T (=DSM 21459T and LMG 24695T).
    Keywords Vagococcus fluvialis ; chromosomes ; genes ; nucleic acid hybridization ; nucleotide sequences ; oleic acid ; palmitic acid ; phylogeny ; plasmids ; polymerase chain reaction ; ribosomal DNA ; ribosomal RNA ; sequence analysis ; sour milk ; stearic acid ; traditional technology
    Language English
    Dates of publication 2018-03
    Size p. 65-72.
    Publishing place Elsevier GmbH
    Document type Article
    ZDB-ID 283612-9
    ISSN 1618-0984 ; 0723-2020
    ISSN (online) 1618-0984
    ISSN 0723-2020
    DOI 10.1016/j.syapm.2017.11.003
    Database NAL-Catalogue (AGRICOLA)

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  9. Article ; Online: Nanoparticle Conjugation of Human Papillomavirus 16 E7-long Peptides Enhances Therapeutic Vaccine Efficacy against Solid Tumors in Mice.

    Galliverti, Gabriele / Tichet, Mélanie / Domingos-Pereira, Sonia / Hauert, Sylvie / Nardelli-Haefliger, Denise / Swartz, Melody A / Hanahan, Douglas / Wullschleger, Stephan

    Cancer immunology research

    2018  Volume 6, Issue 11, Page(s) 1301–1313

    Abstract: Treatment of patients bearing human papillomavirus (HPV)-related cancers with synthetic long-peptide (SLP) therapeutic vaccines has shown promising results in clinical trials against premalignant lesions, whereas responses against later stage carcinomas ... ...

    Abstract Treatment of patients bearing human papillomavirus (HPV)-related cancers with synthetic long-peptide (SLP) therapeutic vaccines has shown promising results in clinical trials against premalignant lesions, whereas responses against later stage carcinomas have remained elusive. We show that conjugation of a well-documented HPV-E7 SLP to ultra-small polymeric nanoparticles (NP) enhances the antitumor efficacy of therapeutic vaccination in different mouse models of HPV
    MeSH term(s) Animals ; Antibodies/pharmacology ; CD8-Positive T-Lymphocytes/immunology ; Cancer Vaccines/chemistry ; Cancer Vaccines/immunology ; Cancer Vaccines/pharmacology ; Female ; Lung Neoplasms/secondary ; Mice, Inbred C57BL ; Mice, Transgenic ; Nanoparticles/chemistry ; Neoplasm Recurrence, Local ; Neoplasms, Experimental/immunology ; Neoplasms, Experimental/mortality ; Neoplasms, Experimental/therapy ; Papillomavirus E7 Proteins/chemistry ; Papillomavirus E7 Proteins/immunology ; Papillomavirus E7 Proteins/pharmacology ; T-Lymphocytes, Regulatory/immunology ; Treatment Outcome ; Tumor Necrosis Factor Receptor Superfamily, Member 9/immunology ; Vaginal Neoplasms/immunology ; Vaginal Neoplasms/pathology ; Vaginal Neoplasms/prevention & control
    Chemical Substances Antibodies ; Cancer Vaccines ; Papillomavirus E7 Proteins ; Tumor Necrosis Factor Receptor Superfamily, Member 9 ; oncogene protein E7, Human papillomavirus type 16
    Language English
    Publishing date 2018-08-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2732489-8
    ISSN 2326-6074 ; 2326-6066
    ISSN (online) 2326-6074
    ISSN 2326-6066
    DOI 10.1158/2326-6066.CIR-18-0166
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Quantitative MRI establishes the efficacy of PI3K inhibitor (GDC-0941) multi-treatments in PTEN-deficient mice lymphoma.

    Wullschleger, Stephan / García-Martínez, Juan M / Duce, Suzanne L

    Anticancer research

    2012  Volume 32, Issue 2, Page(s) 415–420

    Abstract: Aim: To assess the efficacy of multiple treatment of phosphatidylinositol-3-kinase (PI3K) inhibitor on autochthonous tumours in phosphatase and tensin homologue (Pten)-deficient genetically engineered mouse cancer models using a longitudinal magnetic ... ...

    Abstract Aim: To assess the efficacy of multiple treatment of phosphatidylinositol-3-kinase (PI3K) inhibitor on autochthonous tumours in phosphatase and tensin homologue (Pten)-deficient genetically engineered mouse cancer models using a longitudinal magnetic resonance imaging (MRI) protocol.
    Materials and methods: Using 3D MRI, B-cell follicular lymphoma growth was quantified in a Pten(+/-)Lkb1(+/hypo) mouse line, before, during and after repeated treatments with a PI3K inhibitor GDC-0941 (75 mg/kg).
    Results: Mean pre-treatment linear tumour growth rate was 16.5±12.8 mm(3)/week. Repeated 28-day GDC-0941 administration, with 21 days 'off-treatment', induced average tumour regression of 41±7%. Upon cessation of the second treatment (which was not permanently cytocidal), tumours re-grew with an average linear growth rate of 40.1±15.5 mm(3)/week. There was no evidence of chemoresistance.
    Conclusion: This protocol can accommodate complex dosing schedules, as well as combine different cancer therapies. It reduces biological variability problems and resulted in a 10-fold reduction in mouse numbers compared with terminal assessment methods. It is ideal for preclinical efficacy studies and for phenotyping molecularly characterized mouse models when investigating gene function.
    MeSH term(s) Animals ; Cell Line, Tumor ; Disease Models, Animal ; Enzyme Inhibitors/pharmacology ; Female ; Head and Neck Neoplasms/drug therapy ; Head and Neck Neoplasms/enzymology ; Head and Neck Neoplasms/pathology ; Indazoles/pharmacology ; Longitudinal Studies ; Lymphoma, B-Cell/drug therapy ; Lymphoma, B-Cell/enzymology ; Lymphoma, B-Cell/pathology ; Lymphoma, Follicular/drug therapy ; Lymphoma, Follicular/enzymology ; Lymphoma, Follicular/pathology ; Magnetic Resonance Imaging/methods ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; PTEN Phosphohydrolase/deficiency ; Phosphoinositide-3 Kinase Inhibitors ; Sulfonamides/pharmacology
    Chemical Substances 2-(1H-indazol-4-yl)-6-(4-methanesulfonylpiperazin-1-ylmethyl)-4-morpholin-4-ylthieno(3,2-d)pyrimidine ; Enzyme Inhibitors ; Indazoles ; Phosphoinositide-3 Kinase Inhibitors ; Sulfonamides ; PTEN Phosphohydrolase (EC 3.1.3.67) ; Pten protein, mouse (EC 3.1.3.67)
    Language English
    Publishing date 2012-01-27
    Publishing country Greece
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 604549-2
    ISSN 1791-7530 ; 0250-7005
    ISSN (online) 1791-7530
    ISSN 0250-7005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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