Roseovarius tibetensis sp. nov., a halophilic bacterium isolated from Lake LongmuCo on Tibetan Plateau

Hui-bin Lu,Xiao-feng Xue,Dorji Phurbu,Peng Xing,Qing-long Wu 한국미생물학회 2018 The journal of microbiology Vol.56 No.11

Two Gram-stain negative halophilic strains, designated as LM2T and LM4, were isolated from Lake LongmuCo on Tibetan Plateau. These two strains were aerobic, catalaseand oxidase- positive, nonmotile and rod-shaped organisms. Phylogenetic analysis based on 16S rRNA gene sequences indicated that LM2T and LM4 belong to the genus Roseovarius, with Roseovarius tolerans EL-172T (97.3% and 97.4% 16S rRNA gene sequence similarity, respectively) and Roseovarius azorensis SSW084T (95.5% and 95.6% 16S rRNA gene sequence similarity, respectively) as their closest neighbors. Q-10 was the sole respiratory quinone of these two strains. The major fatty acids were C18:1 ω7c/C18:1 ω6c, C16:0, C19:0 cyclo ω8c, and 11-methyl C18:1 ω7c. The polar lipids included phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, phospholipid of unknown structure containing glucosamine, and unidentified aminolipid. The DNA G + C content was between 64.2 and 64.5 mol%. DNA-DNA hybridization showed 96.7% relatedness between LM2T and LM4, 24.9% relatedness between LM2T and R. tolerans EL-172T, and 36.3% relatedness between LM4 and R. tolerans EL-172T. Based on phylogenetic analysis, DNA-DNA hybridization, a range of physiological and biochemical characteristics, LM2T and LM4 belong to the same species and were clearly distinguished from the type strains of the genus Roseovarius. It was evident that LM2T and LM4 could be classified as a novel species of the genus Roseovarius, for which the name Roseovarius tibetensis sp. nov. is proposed. The type strain is LM2T (= CGMCC 1.16230T = KCTC 62028T).

Green’s-function-based-finite element analysis of fully plane anisotropic elastic bodies

Hui Wang,Qing-Hua Qin,Yong-Peng Lei 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.3

In the paper, an anisotropic Green’s function based hybrid finite element was developed for solving fully plane anisotropic elastic materials. In the present hybrid element, the interior displacement and stress fields were approximated by the linear combination of anisotropic Green’s functions derived by Lekhnitskii formulation, the element frame fields were constructed by the interpolation of general shape functions widely used in the conventional finite element, and then they are linked by a new double-variable hybrid functional. Because the approximated interior fields exactly satisfied the governing equations related to anisotropic elasticity, all integrals in the present hybrid functional were performed along the element boundary and theoretically arbitrary hybrid polygonal element can be constructed. Finally, the present hybrid polygonal element with four edges was verified by making comparison of numerical results and exact solutions in a cantilever composite beam made with angled lamina.

Halomonas tibetensis sp. nov., isolated from saline lakes on Tibetan Plateau

Hui-bin Lu,Peng Xing,Lei Zhai,Dorji Phurbu,Qian Tang,Qing-long Wu 한국미생물학회 2018 The journal of microbiology Vol.56 No.7

Strains pyc13T and ZGT13 were isolated from Lake Pengyan and Lake Zigetang on Tibetan Plateau, respectively. Both strains were Gram-negative, catalase- and oxidase-positive, aerobic, rod-shaped, nonmotile, and nonflagellated bacteria. Phylogenetic analysis based on 16S rRNA gene sequences showed that strains pyc13T and ZGT13 belong to the genus Halomonas, with Halomonas alkalicola 56-L4-10aEnT as their closest neighbor, showing 97.4% 16S rRNA gene sequence similarity. The predominant respiratory quinone of both strains was Q-9, with Q-8 as a minor component. The major fatty acids of both strains were C18:1 ω6c/C18:1 ω7c, C16:1 ω6c/C16:1 ω7c, C16:0, and C12:0 3OH. The polar lipids of both strains consisted of phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, glycolipid, phospholipids of unknown structure containing glucosamine, and unidentified phospholipids. The DNA G + C content of pyc13T and ZGT13 were 62.6 and 63.4 mol%, respectively. The DNA-DNA hybridization values of strain pyc13T were 34, 41, 61, 35, and 35% with the reference strains H. alkalicola 56-L4-10aEnT, H. sediminicola CPS11T, H. mongoliensis Z-7009T, H. ventosae Al12T, and H. fontilapidosi 5CRT, respectively. Phenotypic, biochemical, genotypic, and DNA-DNA hybridization data showed that strains pyc13T and ZGT13 represent a new species within the genus Halomonas, for which the name H. tibetensis sp. nov. is proposed. The type strain is pyc13T (= CGMCC 1.15949T = KCTC 52660T).

Three new diphenylpropanes from Celastrus hindsii

Xian Qing Hu,Wei Han,Zhu Zhen Han,Qing Xin Liu,Xi-Ke Xu,Peng Fu,Hui-Liang Li 대한약학회 2014 Archives of Pharmacal Research Vol.37 No.11

Three new diphenylpropanes, HindsiipropaneA–C (1–3), together with one known arylpropyl quinoneGriffithane D (4), were isolated from Celastrus hindsii. Their structures were established by 1D and 2D nuclearmagnetic resonance spectroscopic analysis, and massspectroscopy. Compound 4 was firstly obtained in thisgenus. All the isolated compounds were evaluated in vitrofor cytotoxicity against four human tumor cell lines (A549,HCT116, MDA-MB-231, BEL7404) by the MTT assay.

Bioinformatic Prediction of SNPs within miRNA Binding Sites of Inflammatory Genes Associated with Gastric Cancer

Song, Chuan-Qing,Zhang, Jun-Hui,Shi, Jia-Chen,Cao, Xiao-Qin,Song, Chun-Hua,Hassan, Adil,Wang, Peng,Dai, Li-Ping,Zhang, Jian-Ying,Wang, Kai-Juan Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.2

Polymorphisms in miRNA binding sites have been shown to affect miRNA binding to target genes, resulting in differential mRNA and protein expression and susceptibility to common diseases. Our purpose was to predict SNPs (single nucleotide polymorphisms) within miRNA binding sites of inflammatory genes in relation to gastric cancer. A complete list of SNPs in the 3'UTR regions of all inflammatory genes associated with gastric cancer was obtained from Pubmed. miRNA target prediction databases (MirSNP, Targetscan Human 6.2, PolymiRTS 3.0, miRNASNP 2.0, and Patrocles) were used to predict miRNA target sites. There were 99 SNPs with MAF>0.05 within the miRNA binding sites of 41 genes among 72 inflammation-related genes associated with gastric cancer. NF-${\kappa}B$ and JAK-STAT are the two most important signaling pathways. 47 SNPs of 25 genes with 95 miRNAs were predicted. CCL2 and IL1F5 were found to be the shared target genes of hsa-miRNA-624-3p. Bioinformatic methods could identify a set of SNPs within miRNA binding sites of inflammatory genes, and provide data and direction for subsequent functional verification research.

Age-induced Changes in Ginsenoside Accumulation and Primary Metabolic Characteristics of Panax Ginseng in Transplantation Mode

Wei Yuan,Qing-feng Wang,Wen-han Pei,Si-yu Li,Tian-min Wang,Hui-peng Song,Dan Teng,Ting-guo Kang,Hui Zhang 고려인삼학회 2024 Journal of Ginseng Research Vol.48 No.1

Background: Ginseng (Panax ginseng Mayer) is an important natural medicine. However, a long culture period andchallenging quality control requirements limit its further use. Although artificial cultivation can yield a sustainablemedicinal supply, research on the association between the transplantation and chaining of metabolicnetworks, especially the regulation of ginsenoside biosynthetic pathways, is limited. Methods: Herein, we performed Liquid chromatography tandem mass spectrometry based metabolomic measurementsto evaluate ginsenoside accumulation and categorise differentially abundant metabolites (DAMs). Transcriptome measurements using an Illumina Platform were then conducted to probe the landscape of geneticalterations in ginseng at various ages in transplantation mode. Using pathway data and crosstalk DAMs obtainedby MapMan, we constructed a metabolic profile of transplantation Ginseng. Results: Accumulation of active ingredients was not obvious during the first 4 years (in the field), but followingtransplantation, the ginsenoside content increased significantly from 6 8 years (in the wild). Glycerolipidmetabolism and Glycerophospholipid metabolism were the most significant metabolic pathways, as Lipids andlipid-like molecule affected the yield of ginsenosides. Starch and sucrose were the most active metabolic pathwaysduring transplantation Ginseng growth. Conclusion: This study expands our understanding of metabolic network features and the accumulation of specificcompounds during different growth stages of this perennial herbaceous plant when growing in transplantationmode. The findings provide a basis for selecting the optimal transplanting time.

Genetic variation and phylogenetic relationships of the ectomycorrhizal Floccularia luteovirens on the Qinghai-Tibet Plateau

Rui Xing,Qing-bo Gao,Fa-qi Zhang,Peng-cheng Fu,Jiu-li Wang,Hui-ying Yan,Shi-long-Chen 한국미생물학회 2017 The journal of microbiology Vol.55 No.8

Floccularia luteovirens, as an ectomycorrhizal fungus, is widely distributed in the Qinghai-Tibet Plateau. As an edible fungus, it is famous for its unique flavor. Former studies mainly focus on the chemical composition and genetic structure of this species. However, the phylogenetic relationship between genotypes remains unknown. In this study, the genetic variation and phylogenetic relationship between the genotypes of F. luteovirens in Qinghai-Tibet Plateau was estimated through the analysis on two protein-coding genes (rpb1 and ef-1α) from 398 individuals collected from 24 wild populations. The sample covered the entire range of this species during all the growth seasons from 2011 to 2015. 13 genotypes were detected and moderate genetic diversity was revealed. Based on the results of network analysis, the maximum likelihood (ML), maximum parsimony (MP), and Bayesian inference (BI) analyses, the genotypes H-1, H-4, H-6, H-8, H-10, and H-11 were grouped into one clade. Additionally, a relatively higher genotype diversity (average h value is 0.722) and unique genotypes in the northeast edge of Qinghai- Tibet plateau have been found, combined with the results of mismatch analysis and neutrality tests indicated that Southeast Qinghai-Tibet plateau was a refuge for F. luteovirens during the historical geological or climatic events (uplifting of the Qinghai-Tibet Plateau or Last Glacial Maximum). Furthermore, the present distribution of the species on the Qinghai-Tibet plateau has resulted from the recent population expansion. Our findings provide a foundation for the future study of the evolutionary history and the speciation of this species.

Polymerization of Catechol Employing Polyoxovanadate as Biomimetic Models Catalyze for Textile Dyeing

Zhi-jie Liang,Jiayu Peng,Jiale Liang,Yujing Song,Weini Jia,Qing-hui Mao 한국섬유공학회 2022 Fibers and polymers Vol.23 No.12

The outstanding redox chemistry of polyoxovanadate has shown excellent catalysis prospects. In the present work,the effect of polyoxovanadate (K7[MnV13O38]·18H2O) on the catalytic polymerization of catechol was investigated for thefirst time. The synthesized polymer was applied in-situ for the dyeing of cotton under mild conditions. Various processparameters, including the dosages of catechol and polyoxovanadate and incubation temperature, which influence the colordepth, were analyzed. The effect of different time intervals on polyoxovanadate-catalyzed polymerization of catechol wasexamined using UV-vis spectroscopy. The color intensity of cotton was evaluated by means of K/S value and color difference(ΔE*). The results show that the dyeing depth of the dyed cotton fabrics gradually increased with the extension of time andthe increase in the concentration of polyoxovanadate. This work represents a novel synthetic process exploring the potentialof a polymer to be used for textile dyeing.

Schisandrin B Improves the Hypothermic Preservation of Celsior Solution in Human Umbilical Cord Mesenchymal Stem Cells

Zhang Ying,Wang Peng,Jin Mei-xian,Zhou Ying-qi,Ye Liang,Zhu Xiao-juan,Li Hui-fang,Zhou Ming,Li Yang,Li Shao,Liang Kang-yan,Wang Yi,Gao Yi,Pan Ming-xin,Zhou Shu-qin,Peng Qing 한국조직공학과 재생의학회 2023 조직공학과 재생의학 Vol.20 No.3

BACKGROUND: Human umbilical cord mesenchymal stem cells (hUCMSCs) have emerged as promising therapy for immune and inflammatory diseases. However, how to maintain the activity and unique properties during cold storage and transportation is one of the key factors affecting the therapeutic efficiency of hUCMSCs. Schisandrin B (SchB) has many functions in cell protection as a natural medicine. In this study, we investigated the protective effects of SchB on the hypothermic preservation of hUCMSCs. METHODS: hUCMSCs were isolated from Wharton’s jelly. Subsequently, hUCMSCs were exposed to cold storage (4 C) and 24-h re-warming. After that, cells viability, surface markers, immunomodulatory effects, reactive oxygen species (ROS), mitochondrial integrity, apoptosis-related and antioxidant proteins expression level were evaluated. RESULTS: SchB significantly alleviated the cells injury and maintained unique properties such as differentiation potential, level of surface markers and immunomodulatory effects of hUCMSCs. The protective effects of SchB on hUCMSCs after hypothermic storage seemed associated with its inhibition of apoptosis and the anti-oxidative stress effect mediated by nuclear factor erythroid 2–related factor 2 signaling. CONCLUSION: These results demonstrate SchB could be used as an agent for hypothermic preservation of hUCMSCs.

Protective Effect of Ginsenoside R0 on Anoxic and Oxidative Damage In vitro

( Zhou Jiang ),( Yu Hui Wang ),( Xiao Yun Zhang ),( Tao Peng ),( Yan Qing Li ),( Yi Zhang ) 한국응용약물학회 2012 Biomolecules & Therapeutics(구 응용약물학회지) Vol.20 No.6

To examine the neuroprotective effects of ginsenoside R0, we investigated the effects of ginsenoside R0 in PC12 cells under an anoxic or oxidative environment with Edaravone as a control. PC12 neuroendocrine cells were used as a model target. Anoxic damage or oxidative damage in PC12 cells were induced by adding sodium dithionite or hydrogen peroxide respectively in cul-tured medium. Survival ratios of different groups were detected by an AlamarBlue assay. At the same time, the apoptosis of PC12 cells were determined with flow cytometry. The putative neuroprotective effects of ginsenoside R0 is thought to be exerted through enhancing the activity of antioxidant enzymes Superoxide dismutases (SOD). The activity of SOD and the level of malondialde-hyde (MDA) and intracellular reactive oxygen species (ROS), were measured to evaluate the protective and therapeutic effects of ginsenoside R0. Ginsenoside R0 treated cells had a higher SOD activity, lower MDA level and lower ROS, and their survival ratio was higher with a lower apoptosis rate. It is suggested that ginsenoside R0 has a protective effect in the cultured PC12 cells, and the protection efficiency is higher than Edaravone. The protective mechanisms of these two are different. The prevent ability of ginsenoside R0 is higher than its repair ability in neuroprotection in vitro.