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( Yajun Xie ),( Ping Zhao ),( Zhigang Han ),( Wei Li ),( Dan Shi ),( Lei Xu ),( Qiying Yi ) 한국미생물생명공학회(구 한국산업미생물학회) 2021 Journal of microbiology and biotechnology Vol.31 No.2
Supplement of high-protein food plays an important role in improving the symptoms of malnutrition and the immune capacity of the body, but the association of high-protein diet and gut microbiota remained unaddressed. Here, we systematically analyzed the internal organs and gut microbiota in C57(WT) or PD-1H-depleted (KO) mice (T cells were activated) fed with pupae or feed for six weeks. We observed that the body weight gain in the mice fed with pupae increased less significantly than that of the feed group, while the villi and small intestine lengths in the pupa group were reduced compared with that of mice given feed. However, the average body weight of the KO mice increased compared with that of the WT mice fed with pupae or feed. Pupae increased the concentration of blood glucose in WT, but not in KO mice. Moreover, in the feed group, there was no difference in the weight of the internal organs between the WT and KO mice, but in the pupae-fed group, liver weight was decreased and spleen weight was increased compared with that of KO mice. The amounts/plural/amounts of Melainabacteria, Chloroflexi, and Armatimonadetes were specifically upregulated by pupae, and this upregulation was weakened or eliminated by PD-1H depletion. Some bacteria with high abundance in the feed-fed KO mice, such as Deferribacteres, Melainabacteria, Acidobacteria, Bacteroidetes, Spirochaetes and Verrucomicrobia, were decreased in pupae-fed KO mice, and Proteobacteria and Deinococcus were specifically enriched in pupae-fed KO mice. Bacteroidetes, Firmicutes and Akkermansia were associated with weight loss in the pupaefed group while Lachnospiraceae and Anaerobiospirillum were related glucose metabolism and energy consumption. Based on high-throughput sequencing, we discovered that some gut bacteria specifically regulated the metabolism of a high-protein diet, and PD-1H deficiency improved life quality and sustained blood glucose. Moreover, PD-1H responses to high-protein diet through modulating the type and quantity of gut bacteria. These findings provide evidence about the association among gut microbiota, T cell activation (for PD-1H depletion) and high-protein diet metabolism, have important theoretical significance for nutrition and health research.
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Vagococcus zengguangii sp. nov., isolated from yak faeces
Ge Yajun,Jin Dong,Lai Xin-He,Yang Jing,Lu Shan,Huang Ying,Zheng Han,Zhang Xiaoyan,Xu Jianguo 한국미생물학회 2021 The journal of microbiology Vol.59 No.1
Two unknown Gram-stain-positive, catalase- and oxidasenegative, non-motile, and coccus-shaped bacteria, designated MN-17T and MN-09, were isolated from yaks faeces (Bos grunniens) in the Qinghai-Tibet Plateau of China. 16S rRNA gene sequence-based comparative analyses revealed that the two strains were grouped within the genus Vagococcus, displaying the highest similarity with Vagococcus xieshaowenii CGMCC 1.16436T (98.6%) and Vagococcus elongatus CCUG 51432T (96.4%). Both strains grew optimally at 37°C and pH 7.0 in the presence of 0.5% (w/v) NaCl. The complete genome of MN-17T comprises 2,085 putative genes with a total of 2,190,262 bp and an average G + C content of 36.7 mol%. The major fatty acids were C16:0 (31.2%), C14:0 (28.5%), and C18:1ω9c (13.0%); the predominant respiratory quinone was MK-7 (68.8%); the peptidoglycan type was A4α(L-Lys-DAsp); and the major polar lipid was diphosphatidylglycerol. Together, these supported the affiliation of strain MN-17T to the genus Vagococcus. In silico DNA-DNA hybridization and the average nucleotide identity values between MN-17T and all recognized species in the genus were 21.6–26.1% and 70.7–83.0%, respectively. MN-17T produced acid from D-cellobiose, D-fructose, glycerol, D-glucose, N-acetyl-glucosamine, gentiobiose, D-mannose, D-maltose, D-ribose, Dsaccharose, salicin, D-trehalose, and D-xylose. These results distinguished MN-17T and MN-09 from closely related species in Vagococcus. Thus, we propose that strains MN-17T and MN-09 represent a novel species in the genus Vagococcus, with the name Vagococcus zengguangii sp. The type strain is MN-17T (= CGMCC 1.16726T = GDMCC 1.1589T = JCM 33478T).
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구아군,한카이,정회경,Qiu, Yajun,Han, Kai,Jung, Hoekyung The Korea Institute of Information and Commucation 2021 한국정보통신학회논문지 Vol.25 No.1
중국 시장에서는 한국 화장품의 점유율이 급격히 증가하고 세계 시장에서의 입지가 점차 안정되고 있다. 중국 소비자들이 한국 화장품에 열광하는 이유는 다음과 같다. 우선 한국 화장품은 아시아계 중국 소비자에게 적합하다. 둘째, 한국 화장품의 스타 효과는 의심할 여지가 없는 효과를 발휘하여 한국 화장품이 빠르게 발전하고 중국 시장을 빠르게 점유하고 있다. 한국 화장품에 대한 중국 소비자의 만족도는 한국 화장품 시장에 직접적인 영향을 미친다. 따라서 본 연구의 연구 대상은 '중국 소비자'로 정하고, '한국 화장품에 대한 중국 소비자의 만족도에 영향을 미치는 요인'에 초점을 맞추고 있다. "한국 화장품에 대한 중국 소비자 만족도" 모델을 구축하여 관련 영향 요인을 찾아내고 가설에 대해 시뮬레이션을 하여 중국 소비자가 한국 화장품에 대한 만족도에 실제로 영향을 미치는 요인을 분석하여 제안한다. In the Chinese market, the market share of Korean cosmetics is rapidly increasing and its position in the global market is gradually becoming stable. The reasons why Chinese consumers are enthusiastic about Korean cosmetics are as follows. First of all, Korean cosmetics are suitable for Asian Chinese consumers. Second, the star effect of Korean cosmetics has shown an undoubted effect, making Korean cosmetics rapidly developing and rapidly occupying the Chinese market. Chinese consumers' satisfaction with Korean cosmetics directly affects the Korean cosmetics market. Therefore, the research subject of this study is set to Chinese consumers and focuses on factors that affect Chinese consumers' satisfaction with Korean cosmetics. The "Chinese Consumer Satisfaction with Korean Cosmetics" model is established to find the relevant influencing factors and simulate the hypothesis to analyze and propose the factors that actually affect the satisfaction of Chinese consumers with Korean cosmetics.
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