著者
Kyohei Kuroda Kengo Kubota Shuka Kagemasa Ryosuke Nakai Yuga Hirakata Kyosuke Yamamoto Masaru K. Nobu Takashi Narihiro
出版者
Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology / Japanese Society of Plant Microbe Interactions / Japanese Society for Extremophiles
雑誌
Microbes and Environments (ISSN:13426311)
巻号頁・発行日
vol.37, no.4, pp.ME22063, 2022 (Released:2022-11-12)
参考文献数
25
被引用文献数
3

To identify novel cross-domain symbiosis between Candidatus Patescibacteria and Archaea, we performed fluorescence in situ hybridization (FISH) on enrichment cultures derived from methanogenic bioreactor sludge with the newly designed 32-520-1066 probe targeting the family-level uncultured clade 32-520/UBA5633 lineage in the class Ca. Paceibacteria. All FISH-detectable 32-520/UBA5633 cells were attached to Methanospirillum, indicating high host specificity. Transmission electron microscopy observations revealed 32-520/UBA5633-like cells that were specifically adherent to the plug structure of Methanospirillum-like rod-shaped cells. The metagenome-assembled genomes of 32-520/UBA5633 encoded unique gene clusters comprising pilin signal peptides and type IV pilins. These results provide novel insights into unseen symbiosis between Ca. Patescibacteria and Archaea.
著者
Masafumi YAO Kyosuke YAMAMOTO Takashi KIMURA Munehiko DOMBO
出版者
Japanese Society for Food Science and Technology
雑誌
Food Science and Technology Research (ISSN:13446606)
巻号頁・発行日
vol.14, no.6, pp.589, 2008 (Released:2009-02-18)
参考文献数
26
被引用文献数
9 11

The anti-rhinitis properties of Sparassis crispa were investigated in mice. To examine the immunomodulative activity of oral administration of S. crispa, splenocytes obtained from ovalbumin-sensitized BALB/c mice fed S. crispa were restimulated in vitro with the same antigen. Oral administration of S. crispa induced IFN-γ, but inhibited IL-4 and IL-5 secretion, and suppressed ovalbumin-specific IgE secretion by ovalbumin-stimulated splenocytes. The effects of S. crispa were further investigated by using the allergic rhinitis model in BALB/c mice. Nasal symptoms, sneezing and nasal rubbing induced by ovalbumin challenges were inhibited by oral administration of S. crispa in a dose-dependent manner. Furthermore, ovalbumin-specific serum IgE levels were diminished in this model. These results demonstrated that S. crispa may be effective in suppressing symptoms of allergic rhinitis through its immunomodulating activities.