Publications by Nicolas Jean Philippe Guex

Melanin and Neurotransmitter Signalling Genes Are Differentially Co-Expressed in Growing Feathers of White and Rufous Barn Owls

Nicolas Jean Philippe Guex, Christian Iseli

Regulation of melanin-based pigmentation is complex, involving multiple genes. Because different genes can contribute to the same pigmentation phenotype, the genes identified in model organisms may not necessarily apply to wild species. In the barn owl (Ty ...

WILEY2025

Repairing a deleterious domestication variant in a floral regulator gene of tomato by base editing

Giovanna Ambrosini, Nicolas Jean Philippe Guex, Christian Iseli

Crop genomes accumulate deleterious mutations—a phenomenon known as the cost of domestication. Precision genome editing has been proposed to eliminate such potentially harmful mutations; however, experimental demonstration is lacking. Here we identified a ...

2025

DNA methylation by CcrM contributes to genome maintenance in the Agrobacterium tumefaciens plant pathogen

Giovanna Ambrosini, Nicolas Jean Philippe Guex, Christian Iseli

The cell cycle-regulated DNA methyltransferase CcrM is conserved in most Alphaproteobacteria, but its role in bacteria with complex or multicentric genomes remains unexplored. Here, we compare the methylome, the transcriptome and the phenotypes of wild-typ ...

OXFORD UNIV PRESS2024

Inhibition of anti-tumor immunity by melanoma cell-derived Activin-A depends on STING

Daniel Constam, Giovanna Ambrosini, Nicolas Jean Philippe Guex, Christian Iseli, Katarina Pinjusic

The transforming growth factor-beta (TGF-beta) family member activin A (hereafter Activin-A) is overexpressed in many cancer types, often correlating with cancer-associated cachexia and poor prognosis. Activin-A secretion by melanoma cells indirectly imped ...

Frontiers Media Sa2024

Comparative assessment of cytometry by time-of-flight and full spectral flow cytometry based on a 33-color antibody panel

Nicolas Jean Philippe Guex, Julien Dorier, Miguel Garcia

Mass cytometry and full spectrum flow cytometry have recently emerged as new promising single cell proteomic analysis tools that can be exploited to decipher the extensive diversity of immune cell repertoires and their implication in human diseases. In thi ...

Elsevier2024

Variant-specific pathophysiological mechanisms of AFF3 differently influence transcriptome profiles

Giovanna Ambrosini, Nicolas Jean Philippe Guex, Christian Iseli

Background: We previously described the KINSSHIP syndrome, an autosomal dominant disorder associated with intellectual disability (ID), mesomelic dysplasia and horseshoe kidney,caused by de novo variants in the degron of AFF3. Mouse knock-ins and overexpre ...

BMC2024

tRNA-derived fragments in T lymphocyte-beta cell crosstalk and in type 1 diabetes pathogenesis in NOD mice

Nicolas Jean Philippe Guex, Christian Iseli

Aims/hypothesistRNAs play a central role in protein synthesis. Besides this canonical function, they were recently found to generate non-coding RNA fragments (tRFs) regulating different cellular activities. The aim of this study was to assess the involveme ...

SPRINGER2024

Mechanopathology of biofilm-like Mycobacterium tuberculosis cords

John McKinney, Graham Knott, Neeraj Dhar, Nicolas Jean Philippe Guex, Jessica Sordet, Maxime Jan, Richa Mishra, Mélanie Thérèse Marie Hannebelle, Vivek Vijay Thacker, Kunal Sharma

Mycobacterium tuberculosis (Mtb) cultured axenically without detergent forms biofilm-like cords, a clinical identifier of virulence. In lung-on-chip (LoC) and mouse models, cords in alveolar cells contribute to suppression of innate immune signaling via nu ...

Cell Press2023

A Biallelic Truncating Variant in the TPR Domain of GEMIN5 Associated with Intellectual Disability and Cerebral Atrophy

Nicolas Jean Philippe Guex

GEMIN5 is a multifunctional RNA-binding protein required for the assembly of survival motor neurons. Several bi-allelic truncating and missense variants in this gene are reported to cause a neurodevelopmental disorder characterized by cerebellar atrophy, i ...

2023

DNA modifications impact natural transformation of Acinetobacter baumannii

Melanie Blokesch, Nicolas Jean Philippe Guex, Christian Iseli, Alexandre Lemopoulos, Nina Vesel

Acinetobacter baumannii is a dangerous nosocomial pathogen, especially due to its ability to rapidly acquire new genetic traits, including antibiotic resistance genes (ARG). In A. baumannii, natural competence for transformation, one of the primary modes o ...

2023