Publications by authors named "J DEMARET"

The gastrointestinal tract is a remarkable example of complex biology, with a constant dialogue between the intestinal epithelium, in close contact with the microbiota, and the immune cells that protect the gut from infection. Organoids have revolutionized our approach to modelling the intestinal cellular compartment and have opened new avenues for unravelling the mechanisms involved in intestinal homeostasis and chronic pathogenesis such as inflammatory bowel disease. To date, few models have been established to explore the role of the colon, which is however the main site of inflammation in ulcerative colitis (UC).

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Techniques currently used for the study of antigen-specific T-cell responses are either poorly informative or require a heavy workload. Consequently, many perspectives associated with the broader study of such approaches remain mostly unexplored in translational research. However, these could benefit many fields including but not limited to infectious diseases, oncology, and vaccination.

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Tacrolimus (FK506) is an immunosuppressant that is experiencing a continuous rise in usage worldwide. The related side effects are known to be globally dose-dependent. Despite numerous studies on FK506, the mechanisms underlying FK506 toxicity are still not well understood.

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Article Synopsis
  • This study explored the effectiveness of the BNT162b2 booster vaccine on neutralizing antibodies and T cell responses in healthcare workers against the Omicron sublineages BA.1 and BA.2, before and three months after vaccination.
  • Results showed that before the booster, a small percentage of participants had measurable neutralizing activity, but by three months post-booster, nearly all had developed strong antibody responses against Delta and Omicron variants, although the levels were lower for BA.1 and BA.2 than for Delta.
  • Participants with recent SARS-CoV-2 infections maintained stable antibody levels, while those without infections experienced a decrease in neutralizing antibody titres over the three-month period.
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