Sugano, E. | Search bioRxiv

bioRxiv2025

Wasabi leaf extract changes the expression levels of cytokine related genes in dermal papilla cells, which identified by the whole transcriptome

Wasabi is a traditional food in Asian area. Wasabi leaf extract derived compounds such as 6-methylsulfinylhexyl isothiocyanate (6-MSITC) have been reported to exert anti-proliferative effects on cancer cells. The antibacterial action of wasabi leaf extract has been reported previously. However, the detailed biological effects of wasabi leaf extract are not fully understood. To get a clue for the understanding, we used next-generation sequencing to identify the upregulated or downregulated genes in immortalized human dermal papilla cells. Differentially expressed genes were identified in human papilla cells in the presence or absence of wasabi leaf extract. The effects of 6-MSITC and isosaponarin were evaluated. We found that wasabi leaf extracts upregulated or downregulated the expression of cytokine-related genes. The identified expression changes will contribute to our understanding of the biological effects of wasabi.

cell biology↗

bioRxiv2022

Imbalance of circuit plasticity and consolidation in autism model marmosets is adjusted by oxytocin administration

Alterations in the experience-dependent and autonomous elaboration of neural circuits are assumed to underlie autism spectrum disorder (ASD), though it is unclear what synaptic traits are responsible. Here, we used a valproic acid-induced ASD marmoset model, which shares common molecular features with idiopathic ASD, to investigate the structural dynamics of tuft dendrites of upper-layer pyramidal neurons and adjacent axons in the dorsomedial prefrontal cortex using two-photon microscopy. In model marmosets, dendritic spine turnover was upregulated, and spines were actively generated in clusters and subsequently survived more often than in control marmosets. Presynaptic boutons in local axons but not in commissural long-range axons showed hyperdynamic turnover in model marmosets, suggesting alterations in projection-specific plasticity. Intriguingly, nasal administration of oxytocin reduced the clustered spine emergence. Enhanced clustered spine generation, possibly unique to certain presynaptic partners, may be associated with ASD and may be a potential therapeutic target.

neuroscience↗