Publications by authors named "Louis Chevalier"
The stereotypical tip growth of filamentous fungi supports their lifestyles and functions. It relies on the polarized remodeling and expansion of a protective elastic cell wall (CW) driven by large cytoplasmic turgor pressure. Remarkably, hyphal filament diameters and cell elongation rates can vary extensively among different fungi.
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- Intranasal esketamine is used to treat treatment-resistant depression in France, but common side effects include dissociative symptoms during treatment sessions.
- A case study of a 20-year-old female reveals that her dissociative symptoms not only occurred during treatment but also persisted afterwards, often alongside anxiety, until they resolved by the fourth week.
- The paper discusses possible mechanisms for these delayed dissociative symptoms, including direct effects of esketamine, sensitization of the central nervous system, and anxiety, suggesting that esketamine may increase awareness of dissociative experiences during anxiety attacks, indicating a need for further research.
Hyphal tip growth allows filamentous fungi to colonize space, reproduce, or infect. It features remarkable morphogenetic plasticity including unusually fast elongation rates, tip turning, branching, or bulging. These shape changes are all driven from the expansion of a protective cell wall (CW) secreted from apical pools of exocytic vesicles.
View Article and Find Full Text PDFSystematic mapping of cell wall mechanics in the regulation of cell morphogenesis.
Proc Natl Acad Sci U S A
July 2019
Article Synopsis
- Plant, fungi, and bacterial cell walls vary in shape and size, influenced by their mechanical properties, which help protect against internal pressure.
- Researchers used advanced imaging and laser techniques to measure wall thickness and elasticity in fission yeast, finding that wall stiffness is closely related to cell diameter.
- The study indicates that as cells stretch, their walls become stiffer, which helps maintain cell integrity and could affect growth and survival by limiting size variations.