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Julien Tap
Research Scientist
After several internships in microbiology at Institut Pasteur (Patrick Grimont, Philippe Glaser, Sylvain Brisse), Julien Tap went to Joel Doré’s Lab to do a PhD headed by Marion Leclerc (Jan 2007 to Dec 2009). His main project was to study dietary fiber impact on human gut microbiota using notably metagenomic and metatranscriptomic approaches.
Since his PhD, his research interest focused on interactions between nutrition, gut microbiota, and human health. This allowed him to work with different AP-HP clinicians like Pr Karine Clément and Pr Iradj Sobhani. As post-doc did at EMBL in Peer Bork’s group and at INRAE Metagenopolis unit (Joel Doré, Dusko Ehrlich), as well as Danone Research, he used several approaches like numerical ecology and machine learning technics to untangle big omics data with clinical and dietary data.
Julien is currently a research scientist at INRAE Micalis institute settled in Paris-Saclay campus, where he works on projects related to the interactions between food and human microbiomes in a nutrition and health perspective.
Selected publications
- Tap et al. Global branches and local states of the human gut microbiome define associations with environmental and intrinsic factors. 2023. Nature communications
- Tap et al. The Human Gut Microbiota in all its States: From Disturbance to Resilience. Comprehensive Gut Microbiota, Elsevier, pp.161-178, 2022.
- Tap et al. Diet and gut microbiome interactions of relevance for symptoms in irritable bowel syndrome. 2021. Microbiome
- Tap et al. Identification of an intestinal microbiota signature associated with severity of irritable bowel syndrome. 2017. Gastroenterology
- Tap et al. Gut microbiota richness promotes its stability upon increased dietary fibre intake in healthy adults . 2015. Environmental microbiology
Last related news
A seed meeting between INRAE Micalis Institute and Imperial College London
Oct 03, 2025
Last week on October 3rd, scientists from Imperial College London (ICL) and from INRAE Micalis Institute were hosted by the French embassy in London for a seed meeting around synthetic biology and synthetic microbial ecology as scientific strategies for biotechnology and food production. A special thanks to the organizer: Ludovic Drouin (French Embassy), Young-Kyoung Park (Micalis) and Rodriguo Ledesma-Amaro (ICL). Our several groups with complementary research discussed about perspectives of future collaborations on the field together with Ferment du Futur or Bezos Centre.
School of Artificial Intelligence Applied to Microbiomes
Oct 01, 2025
Earlier this month, Julien had the pleasure of participating as a lecturer at the School of Artificial Intelligence Applied to Microbiomes, hosted at AgroParisTech and organized by Aristeidis Litos, Daniel Garza, and Ariane Bize. The event brought together an exceptional group of researchers and students exploring how AI, data science, and mathematical modeling are reshaping our understanding of microbial ecosystems.
The French Gut at EMBL Human Microbiome Symposium 2025
Sep 18, 2025
The relationship between diet and the gut microbiome lies at the heart of both health and sustainability challenges. Understanding how dietary habits shape microbial diversity is key to developing new strategies for precision nutrition.