Comparative studies on Lactococcus garvieae between human feces isolates and fish isolates

Uchiyama, Shigeto; Ueno, Tomomi; Tadano, Kentaro; Furukawa, Mikiko; Nishiki, Issei; Nomoto, Ryohei; Nagamune, Hideaki; Nakai, Toshiko; Yoshida, Terutoyo

doi:10.2331/suisan.74.1085

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…According to the criteria proposed by Tenover et al [18], the dendrogram created in this study revealed that all of the 427 fish isolates obtained in Japan were closely related to each other, with a similarity index of 0.7 or higher. Uchiyama et al [19] reported that a dendrogram created using the BSFGE analysis showed a low similarity index between L. garvieae strains isolated from human feces and fish. These results indicated that L. garvieae strains isolated from diseased fish in Japan were genetically homogeneous.…”

Section: Discussionmentioning

confidence: 99%

Epidemiological study on Lactococcus garvieae isolates from fish in Japan

Nishiki

Furukawa²,

Matui

et al. 2011

Fish Sci

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In Japan, Lactococcus garvieae infection has been the main fish disease in aquaculture. Although commercial oral and injectable vaccines have been used to prevent L. garvieae infection in Japan, L. garvieae has been isolated not only from unvaccinated fish but also from vaccinated fish in which immunity induced by vaccination had diminished. In order to obtain epidemiological information on this fish pathogen, we conducted biased sinusoidal field gel electrophoresis (BSFGE) pattern analysis and phage typing of L. garvieae isolates (n = 427) from fish in Japan. These isolates were obtained from 13 different fish species between 1980 and 2007. In the BSFGE analysis, L. garvieae isolates were classified into 17 groups (S1-S17) based on the SmaI digestion patterns and into four groups (A1-A4) based on the ApaI digestion patterns. Phage typing revealed five different phage susceptibility profiles (A-E) in L. garvieae isolates. Since 2005, comparisons of the results of phage typing and BSFGE have indicated the presence of a novel genotype (S16/A4) with phage type E. All the strains belonging to this type showed lincomycin sensitivity.

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Section: Discussionmentioning

confidence: 99%

Epidemiological study on Lactococcus garvieae isolates from fish in Japan

Nishiki

Furukawa²,

Matui

et al. 2011

Fish Sci

Self Cite

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New Insights into “Equol”, a Novel Ingredient Derived from Soy

成人¹

2015

JOURNAL OF THE JAPANESE SOCIETY FOR FOOD SCIENCE AND TECHNOLOGY

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S-equol is a major intestinally-derived bacterial metabolite of daidzein, one of the principal isoflavones found in soybeans and most soy foods. S-equol has a similar structure to estrogen, and binds to estrogen receptors to exhibit estrogenic activity. S-equol has been shown to bind to estrogen receptors (ER) α and β and to effectively activate both receptors, although with greater transactivation of ERβ. It has been proposed that the ability to make S-equol when soy is consumed may be an important factor in determining the clinical efficacy of a soy diet, the so-called equol hypothesis. Equol has many beneficial effects on menopausal women. However, equol production depends on the individual's intestinal flora; and research has shown that only 30 to 50 % of individuals in the populations studied are capable of producing equol from daidzein. A lactic acid bacterium, Lactococcus garvieae (Lactococcus 20-92 strain), with equol-producing capabilities was identified and isolated from human feces. Recently, we standardized the production of an S-equol supplement (SE5-OH) using this strain. Reports suggest that the S-equol supplement contributes positively to menopausal symptoms, bone health, metabolic syndrome and skin aging. In this paper, we introduce new insights into equol or SE5-OH based on epidemiological and clinical study.

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Comparative studies on Lactococcus garvieae between human feces isolates and fish isolates

Cited by 2 publications

References 11 publications

Epidemiological study on Lactococcus garvieae isolates from fish in Japan

Epidemiological study on Lactococcus garvieae isolates from fish in Japan

New Insights into “Equol”, a Novel Ingredient Derived from Soy

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