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Université de Fribourg

Tissue-specific transcription footprinting using RNA PoI DamID (RAPID) in Caenorhabditis elegans

Gómez-Saldivar, Georgina ; Osuna-Luque, Jaime ; Semple, Jennifer I. ; Glauser, Dominique A. ; Jarriault, Sophie ; Meister, Peter

In: Genetics, 2020, vol. 216, no. 4, p. 931–945

Differential gene expression across cell types underlies development and cell physiology in multicellular organisms. Caenorhabditis elegans is a powerful, extensively used model to address these biological questions. A remaining bottleneck relates to the difficulty to obtain comprehensive tissue-specific gene transcription data, since available methods are still challenging to execute and/or...

Università della Svizzera italiana

Memory T cells in latent mycobacterium tuberculosis infection are directed against three antigenic islands and largely contained in a CXCR3+CCR6+ Th1 subset

Lindestam Arlehamn, Cecilia S. ; Gerasimova, Anna ; Mele, Federico ; Henderson, Ryan ; Swann, Justine ; Greenbaum, Jason A. ; Kim, Yohan ; Sidney, John ; James, Eddie A. ; Taplitz, Randy ; McKinney, Denise M. ; Kwok, William W. ; Grey, Howard ; Sallusto, Federica ; Peters, Bjoern ; Sette, Alessandro

In: Plos pathogens, 2013, vol. 9, no. 1, p. e1003130

An understanding of the immunological footprint of Mycobacterium tuberculosis (MTB) CD4 T cell recognition is still incomplete. Here we report that human Th1 cells specific for MTB are largely contained in a CXCR3+CCR6+ memory subset and highly focused on three broadly immunodominant antigenic islands, all related to bacterial secretion systems. Our results refute the notion that secreted...

Université de Fribourg

Secondary metabolites from Triclisia gilletii (De Wild) Staner (Menispermaceae) with antimycobacterial activity against Mycobacterium tuberculosis

Tiam, Eric Robert ; Ngono Bikobo, Dominique Serge ; Zintchem, Auguste Abouem A. ; Mbabi Nyemeck II, Norbert ; Moni Ndedi, Esther Del Florence ; Betote Diboué, Patrick Hervé ; Nyegue, Maximilienne Ascension ; Atchadé, Alex de Théodore ; Pegnyemb, Dieudonné Emmanuel ; Bochet, Christian G. ; Koert, Ulrich

In: Natural Product Research, 2019, vol. 33, no. 5, p. 642–650

Triclisinone (2), a new ochnaflavone derivative, was isolated from the aerial parts of Triclisia gilletii, along with known drypemolundein B (1) and eight other known compounds. The chemical shifts of drypemolundein B (1) have been partially revised based on reinterpretation of NMR spectroscopic data. The eight other secondary metabolites are composed of: (+)-nonacosan-10-ol (3); stigmasterol...

Università della Svizzera italiana

Immunological consequences of intragenus conservation of Mycobacterium tuberculosis T-cell epitopes

Lindestam Arlehamn, Cecilia S. ; Paul, Sinu ; Mele, Federico ; Huang, Charlie ; Greenbaum, Jason A. ; Vita, Randi ; Sidney, John ; Peters, Bjoern ; Sallusto, Federica ; Sette, Alessandro

In: Proceedings of the national academy of sciences of the United States of America, 2015, vol. 112, no. 2, p. E147-E155

A previous unbiased genome-wide analysis of CD4 Mycobacterium tuberculosis (MTB) recognition using peripheral blood mononuclear cells from individuals with latent MTB infection (LTBI) or nonexposed healthy controls (HCs) revealed that certain MTB sequences were unexpectedly recognized by HCs. In the present study, it was found that, based on their pattern of reactivity, epitopes could be...