Proceedings of the Japan Academy, Series B
Online ISSN : 1349-2896
Print ISSN : 0386-2208
ISSN-L : 0386-2208
Current issue
Displaying 1-3 of 3 articles from this issue
Review Series to Celebrate Our 100th Volume
  • Tomoyuki Kitagawa
    2024 Volume 100 Issue 6 Pages 309-319
    Published: 2024
    Released on J-STAGE: June 12, 2024

    This review seeks to highlight and celebrate Professor Tomizo Yoshida’s famous work on “Establishment and characterization of a rat ascites sarcoma, later named “Yoshida ascites sarcoma”. Considering the tremendous contribution of this ascites tumor system to the subsequent promotion of research on cancer biology and cancer chemotherapy, his paper should be regarded as a monumental one in the cancer field. The research was carried out during 1943 and the results were submitted to this Journal in October 1944, when Japan was approaching a debilitating defeat in World War II in August 1945. In 1947, when “Research on Ascites sarcoma” was first comprehensively introduced to researchers in a special lecture at the Annual Meeting of the Japanese Society of Pathology, the whole audience was deeply impressed and was encouraged to resume scientific activity in Japan.

  • Wataru TERASHIMA, Yuichiro K. KATO
    2024 Volume 100 Issue 6 Pages 320-334
    Published: 2024
    Released on J-STAGE: June 12, 2024

    Carbon nanotubes are a telecom band emitter compatible with silicon photonics, and when coupled to microcavities, they present opportunities for exploiting quantum electrodynamical effects. Microdisk resonators demonstrate the feasibility of integration into the silicon platform. Efficient coupling is achieved using photonic crystal air-mode nanobeam cavities. The molecular screening effect on nanotube emission allows for spectral tuning of the coupling. The Purcell effect of the coupled cavity-exciton system reveals near-unity radiative quantum efficiencies of the excitons in carbon nanotubes.

Original Articles
    2024 Volume 100 Issue 6 Pages 335-352
    Published: 2024
    Released on J-STAGE: June 12, 2024
    Advance online publication: May 02, 2024
    Supplementary material

    Recent studies have highlighted the impact of disrupted maternal gut microbiota on the colonization of offspring gut microbiota, with implications for offspring developmental trajectories. The extent to which offspring inherit the characteristics of altered maternal gut microbiota remains elusive. In this study, we employed a mouse model where maternal gut microbiota disruption was induced using non-absorbable antibiotics. Systematic chronological analyses of dam fecal samples, offspring luminal content, and offspring gut tissue samples revealed a notable congruence between offspring gut microbiota profiles and those of the perturbed maternal gut microbiota, highlighting the profound influence of maternal microbiota on early-life colonization of offspring gut microbiota. Nonetheless, certain dominant bacterial genera in maternal microbiota did not transfer to the offspring, indicating a bacterial taxonomy-dependent mechanism in the inheritance of maternal gut microbiota. Our results embody the vertical transmission dynamics of disrupted maternal gut microbiota in an animal model, where the gut microbiota of an offspring closely mirrors the gut microbiota of its mother.