著者

Chisato NISHIYAMA Suguru SEKIGUCHI Yu SUGIHARA Minami NISHIKAWA Natsu MAKITA Tenta SEGAWA Momoka TERASAKI Hiroki TAKAGI Takashi KOYANAGI

出版者

BMFH Press

雑誌

Bioscience of Microbiota, Food and Health (ISSN:21863342)

巻号頁・発行日

vol.42, no.2, pp.138-142, 2023 (Released:2023-04-01)

参考文献数

21

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Latilactobacillus sakei is a lactic acid bacterium used to produce a wide range of fermented food products. To understand their characteristics and adaptability to various nutrient sources, we applied strain-specific, nucleotide-concatenated (SSC) sequences to the phylogenetic analysis of 32 L. sakei strains isolated from various locations and products. SSC sequences were developed by concatenating the polymorphisms detected by whole-genome sequencing. This enabled us to use sufficient polymorphisms and avoid the bias caused by selecting partial sequences, such as that in core genome and multi-locus sequence typing. SSC sequence-based analysis revealed that the phylogenetic relations for L. sakei are based on the different nutrition sources rather than geographical distance.

著者

Hideto SHIRASAWA Chisato NISHIYAMA Rika HIRANO Takashi KOYANAGI Shujiro OKUDA Hiroki TAKAGI Shin KURIHARA

出版者

BMFH Press

雑誌

Bioscience of Microbiota, Food and Health (ISSN:21863342)

巻号頁・発行日

vol.42, no.1, pp.24-33, 2023 (Released:2023-01-01)

参考文献数

58

被引用文献数

1

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It has been reported that the intake of polyamines contributes to the extension of healthy life span in animals. Fermented foods contain high concentrations of polyamines thought to be derived from fermentation bacteria. This suggests that bacteria that produce high levels of polyamines could be isolated from fermented foods and utilized as a source of polyamines for human nutrition. In this study, Staphylococcus epidermidis FB146 was isolated from miso, a Japanese fermented bean paste, and found to have a high concentration of putrescine in its culture supernatant (452 μM). We analyzed the presence of polyamines in the culture supernatants and cells of the type strains of 21 representative Staphylococcus species in addition to S. epidermidis FB146, and only S. epidermidis FB146 showed high putrescine productivity. Furthermore, whole-genome sequencing of S. epidermidis FB146 was performed, and the ornithine decarboxylase gene (odc), which is involved in putrescine synthesis, and the putrescine:ornithine antiporter gene (potE), which is thought to contribute to the release of putrescine into the culture supernatant, were present on plasmid DNA harbored by S. epidermidis FB146.

著者

Eri Kokubo Hirofumi Sonoki Kenta Aizawa Hiroki Takagi Masayasu Takada Ayako Ito Yuki Nakazato Yasuhiro Takeda Kazuhiro Miyaji

出版者

The Japanese Society of Applied Glycoscience

雑誌

Journal of Applied Glycoscience (ISSN:13447882)

巻号頁・発行日

pp.jag.JAG-2021_0013, (Released:2022-04-19)

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Slowly digestible carbohydrates are needed for nutritional support in diabetic patients with malnutrition. They are a good source of energy and have the advantage that their consumption produces a low postprandial peak in blood glucose levels because they are slowly and completely digested in the small intestine. A high-amount isomaltomegalosaccharide containing carbohydrate (H-IMS), made from starch by dextrin dextranase, is a mixture of glucose polymers which has a continuous linear structure of α-1,6-glucosidic bonds and a small number of α-1,4-glucosidic bonds at the reducing ends. It has a broad degree of polymerization (DP) distribution with glucans of DP 10-30 as the major component. In our previous study, H-IMS has been shown to exhibit slow digestibility in vitro and not to raise postprandial blood glucose to such levels as that raised by dextrin in vivo. This marks it out as a potentially useful slowly digestible carbohydrate, and this study aimed to evaluate its in vivo digestibility. The amount of breath hydrogen emitted following oral administration of H-IMS was measured to determine whether any indigestible fraction passed through to and was fermented in the large intestine. Total carbohydrate in the feces was also measured. H-IMS, like glucose and dextrin, did not result in breath hydrogen excretion. Carbohydrate excretion with dietary H-IMS was no different from that of glucose or water. These results show that the H-IMS is completely digested and absorbed in the small intestine, indicating its potential as a slowly digestible carbohydrate in the diet of diabetic patients.

著者

Shinji Fukushima Hitoshi Kikuchi Mitsunobu Miyazu Atsuo Hamada Kazunobu Ouchi Hiroki Takagi Hanako Mihara Toru Sasaki Hayato Oka Valerie Bosch-Castells Philipp Oster

出版者

National Institute of Infectious Diseases, Japanese Journal of Infectious Diseases Editorial Committee

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

pp.JJID.2017.277, (Released:2018-06-29)

参考文献数

31

被引用文献数

6

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Meningococcal disease can cause significant disability and mortality. The quadrivalent meningococcal polysaccharide diphtheria toxoid conjugate vaccine (Men-ACWY-D) protects against invasive meningococcal disease caused by serogroups A, C, W, and Y. This phase III, open-label, single-arm, multicenter study evaluated the safety and immunogenicity of a single vaccine dose in healthy Japanese adults. The study enrolled 200 participants 2-55 years of age. Immunogenicity was assessed by quantifying seroprotection rates (the proportion of participants with antibody titers ≥1:128 against capsular polysaccharide from all 4 serogroups, measured 28 days after vaccination). Safety endpoints included occurrence, nature, time to onset, duration, intensity, relationship to vaccination, and outcome of solicited and unsolicited adverse events (AEs) and serious AEs (SAEs). Participants included 194 adults, 2 adolescents, and 4 children. Among adults, seroprotection rates for serogroups A, C, W, and Y were 91.2%, 80.2%, 89.1%, and 93.8%, respectively. Seroconversion rates (proportion of participants with pre-vaccination titers of <1:4 and a ≥4-fold rise from baseline) were 87.3%, 83.0%, 94.4%, and 96.4%, respectively. No immediate AEs or reactions, SAEs, or deaths were reported in any age group. Men-ACWY-D is well tolerated and immunogenic, eliciting antibodies against capsular polysaccharides from all 4 serogroups in Japanese adults.