Publications by authors named "I Takenaka"

The Ogasawara Islands, one of the UNESCO World Natural Heritage Site located about 1000 km south of Japan's main island, harbor numerous endemic species, many of which are as endangered. One of the endemic plant species, Lobelia boninensis, found in the Mukojima, Chichijima, and Hahajima archipelagoes, is endangered due to predation. As part of conservation efforts, translocation is now underway, especially on Chichijima.

View Article and Find Full Text PDF
Article Synopsis
  • * Participating labs analyzed 7 shared samples (5 human stool and 2 mock communities) using their own methods, while providing detailed reports on their protocols to capture methodological variability.
  • * The findings revealed that choices in laboratory protocols significantly influence measurement accuracy and reliability, highlighting the challenges in comparing results across studies.
View Article and Find Full Text PDF

The clinical and pathological responses to multimodal neoadjuvant therapy in locally advanced rectal cancers (LARCs) remain unpredictable, and robust biomarkers are still lacking. Recent studies have shown that tumors present somatic molecular alterations related to better treatment response, and it is also clear that tumor-associated bacteria are modulators of chemotherapy and immunotherapy efficacy, therefore having implications for long-term survivorship and a good potential as the biomarkers of outcome. Here, we performed whole exome sequencing and 16S ribosomal RNA (rRNA) amplicon sequencing from 44 pre-treatment LARC biopsies from Argentinian and Brazilian patients, treated with neoadjuvant chemoradiotherapy or total neoadjuvant treatment, searching for predictive biomarkers of response (responders, = 17; non-responders, = 27).

View Article and Find Full Text PDF

Whereas targeted and shotgun sequencing approaches are both powerful in allowing the study of tissue-associated microbiota, the human: microorganism abundance ratios in tissues of interest will ultimately determine the most suitable sequencing approach. In addition, it is possible that the knowledge of the relative abundance of bacteria and fungi during a treatment course or in pathological conditions can be relevant in many medical conditions. Here, we present a qPCR-targeted approach to determine the absolute and relative amounts of bacteria and fungi and demonstrate their relative DNA abundance in nine different human tissue types for a total of 87 samples.

View Article and Find Full Text PDF

The highest theoretical efficiency of double junction solar cells is predicted for architectures with the bottom cell bandgap ( ) of approximately 0.9-1.0 eV, which is lower than that of a typical Si cell (1.

View Article and Find Full Text PDF