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Journal of Microbiology / the Microbiological Society of Korea

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https://www.readbyqxmd.com/read/29214496/erratum-to-application-of-high-resolution-melting-analysis-for-differentiation-of-spoilage-yeasts
#1
Mine Erdem, Zülal Kesmen, Esra Özbekar, Bülent Çetin, Hasan Yetim
In the article by Erdem et al. published in Journal of Microbiology 2016; 54, 618-625, the figure 1 should be corrected as below.
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29214495/comparison-of-anti-influenza-virus-activity-and-pharmacokinetics-of-oseltamivir-free-base-and-oseltamivir-phosphate
#2
Jin Soo Shin, Keun Bon Ku, Yejin Jang, Yi-Seul Yoon, Daeho Shin, Oh Seung Kwon, Yun Young Go, Seong Soon Kim, Myoung Ae Bae, Meehyein Kim
Influenza viruses are major human respiratory pathogens that cause high morbidity and mortality worldwide. Currently, prophylactic vaccines and therapeutic antiviral agents are used to prevent and control influenza virus infection. Oseltamivir free base (OSV-FB), a modified generic antiviral drug of Tamiflu (oseltamivir phosphate, OSV-P), was launched in the Republic of Korea last year. Here, we examine the bioequivalence of these two compounds by assessing their antiviral efficacy in infected cells and in a mouse model...
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29214494/guinea-pig-complement-potently-measures-vibriocidal-activity-of-human-antibodies-in-response-to-cholera-vaccines
#3
Kyoung Whun Kim, Soyoung Jeong, Ki Bum Ahn, Jae Seung Yang, Cheol-Heui Yun, Seung Hyun Han
The vibriocidal assay using guinea pig complement is widely used for the evaluation of immune responses to cholera vaccines in human clinical trials. However, it is unclear why guinea pig complement has been used over human complement in the measurement of vibriocidal activity of human sera and there have not been comparison studies for the use of guinea pig complement over those from other species. Therefore, we comparatively investigated the effects of complements derived from human, guinea pig, rabbit, and sheep on vibriocidal activity...
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29214493/virgibacillus-kimchii-sp-nov-a-halophilic-bacterium-isolated-from-kimchi
#4
Young Joon Oh, Ja-Young Jang, Seul Ki Lim, Min-Sung Kwon, Jieun Lee, NamHee Kim, Mi-Young Shin, Hyo Kyeong Park, Myung-Ji Seo, Hak-Jong Choi
A Gram-stain-positive, halophilic, rod-shaped, non-motile, spore forming bacterium, strain NKC1-2T, was isolated from kimchi, a Korean fermented food. Comparative analysis based on 16S rRNA gene sequence demonstrated that the isolated strain was a species of the genus Virgibacillus. Strain NKC1-2T exhibited high level of 16S rRNA gene sequence similarity with the type strains of Virgibacillus xinjiangensis SL6-1T (96.9%), V. sediminis YIM kkny3T (96.8%), and V. salarius SA-Vb1T (96.7%). The isolate grew at pH 6...
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29214492/an-ethanol-extract-of-lysimachia-mauritiana-exhibits-inhibitory-activity-against-hepatitis-e-virus-genotype-3-replication
#5
Seong Eun Jin, Jung-Eun Kim, Sun Yeou Kim, Bang Ju Park, Yoon-Jae Song
Hepatitis E virus (HEV) is an etiological agent of acute hepatitis E, a self-limiting disease prevalent in developing countries. HEV can cause fulminant hepatic failure with high mortality rates in pregnant women, and genotype 3 is reported to trigger chronic hepatitis in immunocompromised individuals worldwide. Screening of plant extracts for compounds with potential anti-HEV effects led to the identification of a 70% ethanol extract of Lysimachia mauritiana (LME) that interferes with replication of the swine HEV genotype 3 replicon...
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29214491/cecal-microbiome-divergence-of-broiler-chickens-by-sex-and-body-weight
#6
Kyu-Chan Lee, Dong Yong Kil, Woo Jun Sul
The divergence of gut bacterial community on broiler chickens has been reported as potentially possible keys to enhancing nutrient absorption, immune systems, and increasing poultry health and performance. Thus, we compared cecal bacterial communities and functional predictions by sex and body weight regarding the association between cecal microbiota and chicken growth performance. In this study, a total of 12 male and 12 female 1-day-old broiler chickens were raised for 35 days in 2 separate cages. Chickens were divided into 3 subgroups depending on body weight (low, medium, and high) by each sex...
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29214490/spirosoma-migulaei-sp-nov-isolated-from-soil
#7
Joseph Okiria, Leonid N Ten, Su-Jin Park, Seung-Yeol Lee, Dong Hoon Lee, In-Kyu Kang, Dae Sung Lee, Hee-Young Jung
A Gram-stain-negative, non-motile, non-spore-forming, rod-shaped, aerobic bacterium, designated 15J9-8T, was isolated from soil on Jeju Island, Republic of Korea. The isolate was able to grow between 10 and 30°C, pH 6.5-8.5, and in presence of 0-1% (w/v) NaCl. The results of comparative 16S rRNA gene sequence analysis indicated that strain 15J9-8T represented a member of the family Cytophagaceae, phylum Bacteroidetes, and was most closely related to Spirosoma aerophilum 5516J-17T (96.1% similarity), Spirosoma pulveris JSH5-14T (95...
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29214489/direct-interaction-between-the-transcription-factors-cadc-and-ompr-involved-in-the-acid-stress-response-of-salmonella-enterica
#8
Yong Heon Lee, Ji Hye Kim
In Salmonella enterica serovar Typhimurium, the acid-sensing regulator CadC activates transcription of the cadBA operon which contributes to the acid tolerance response. The DNA-binding response regulator OmpR in two-component regulatory system with EnvZ binds to its own promoter for autoinduction. We previously reported that CadC exerts a negative influence on ompR transcription during acid adaptation. However, its underlying mechanisms remain to be elucidated. Here we show that the level of OmpR protein is gradually reduced by a gradual increase in the CadC level using an arabinose-inducible expression system, indicating there exists a negative correlation between the expression levels of two transcription factors...
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29214488/electron-microscopic-observations-of-prokaryotic-surface-appendages
#9
REVIEW
Ki Woo Kim
Prokaryotic microbes possess a variety of appendages on their cell surfaces. The most commonly known surface appendages of bacteria include flagella, pili, curli, and spinae. Although archaea have archaella (archaeal flagella) and various types of pili that resemble those in bacteria, cannulae, and hami are unique to archaea. Typically involved in cell motility, flagella, the thickest appendages, are 20-26 nm and 10-14 nm wide in bacteria and archaea, respectively. Bacterial and archaeal pili are distinguished by their thin, short, hair-like structures...
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29214487/effects-of-dietary-poly-%C3%AE-hydroxybutyrate-phb-on-microbiota-composition-and-the-mtor-signaling-pathway-in-the-intestines-of-litopenaeus-vannamei
#10
Yafei Duan, Yue Zhang, Hongbiao Dong, Yun Wang, Jiasong Zhang
Poly-β-hydroxybutyrate (PHB) is a natural polymer of the short chain fatty acid β-hydroxybutyrate, which acts as a microbial control agent. The mammalian target of the rapamycin (mTOR) signaling pathway plays a crucial role in intestine inflammation and epithelial morphogenesis. In this study, we examined the composition of intestine microbiota, and mTOR signaling-related gene expression in Pacific white shrimp Litopenaeus vannamei fed diets containing different levels of PHB: 0% (Control), 1% (PHB1), 3% (PHB3), and 5% (PHB5) (w/w) for 35 days...
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29214486/metabolism-mediated-induction-of-zinc-tolerance-in-brassica-rapa-by-burkholderia-cepacia-cs2-1
#11
Sang-Mo Kang, Raheem Shahzad, Saqib Bilal, Abdul Latif Khan, Young-Hyun You, Won-Hee Lee, Hee-La Ryu, Ko-Eun Lee, In-Jung Lee
Brassica rapa (Chinese cabbage) is an essential component of traditional Korean food. However, the crop is often subject to zinc (Zn+) toxicity from contaminated irrigation water, which, as a result, compromises plant growth and production, as well as the health of human consumers. The present study investigated the bioaccumulation of Zn+ by Burkholderia cepacia CS2-1 and its effect on the heavy metal tolerance of Chinese cabbage. Strain CS2-1 was identified and characterized on the basis of 16S rRNA sequences and phylogenetic analysis...
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29076074/de-novo-transcriptome-assembly-and-characterization-of-the-10-hydroxycamptothecin-producing-xylaria-sp-m71-following-salicylic-acid-treatment
#12
Xiaowei Ding, Kaihui Liu, Yonggui Zhang, Feihu Liu
In the present study, we identified genes that are putatively involved in the production of fungal 10-hydroxycamptothecin via transcriptome sequencing and characterization of the Xylaria sp. M71 treated with salicylic acid (SA). A total of 60,664,200 raw reads were assembled into 26,044 unigenes. BLAST assigned 8,767 (33.7%) and 10,840 (41.6%) unigenes to 40 Gene Ontology (GO) annotations and 108 Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways, respectively. A total of 3,713 unigenes comprising 1,504 upregulated and 2,209 downregulated unigenes were found to be differentially expressed between SA-induced and control fungi...
November 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29076073/dense-granule-protein-7-gra-7-of-toxoplasma-gondii-inhibits-viral-replication-in-vitro-and-in-vivo
#13
Prasanna Weeratunga, Thilina U B Herath, Tae-Hwan Kim, Hyun-Cheol Lee, Jae-Hoon Kim, Byeong-Hoon Lee, Eun-Seo Lee, Kiramage Chathuranga, W A Gayan Chathuranga, Chul-Su Yang, Jin Yeul Ma, Jong-Soo Lee
Dense granule protein-7 (GRA-7) is an excretory protein of Toxoplasma gondii. It is a potential serodiagnostic marker and vaccine candidate for toxoplasmosis. Previous reports demonstrated that GRA-7 induces innate immune responses in macrophages by interacting with TRAF6 via the MyD88-dependent pathway. In the present study, we evaluated the antiviral activity and induction of an antiviral state by GRA-7 both in vitro and in vivo. It was observed that GRA-7 markedly reduced the replication of vesicular stomatitis virus (VSV-GFP), influenza A virus (PR8-GFP), coxsackievirus (H3-GFP), herpes simplex virus (HSV-GFP), and adenovirus-GFP in epithelial (HEK293T/HeLa) and immune (RAW264...
November 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29076072/characterization-of-siderophore-produced-by-pseudomonas-syringae-baf-1-and-its-inhibitory-effects-on-spore-germination-and-mycelium-morphology-of-fusarium-oxysporum
#14
Sumei Yu, Chunying Teng, Jinsong Liang, Tao Song, Liying Dong, Xin Bai, Yu Jin, Juanjuan Qu
In this study, an antagonistic bacterium against Fusarium oxysporum was identified and designated as Pseudomonas syringae strain BAF.1 on the basis of 16S rDNA sequence analysis and physiological-biochemical characteristics. It produced catechol-species siderophore at a molecular weight of 488.59 Da and a maximum amount of 55.27 μg/ml with glucose as a carbon source and asparagine as a nitrogen source at a C/N ratio of 10:1, 30°C and pH 7. The siderophore exhibited prominent antagonistic activity against Fusarium oxysporum with a maximum inhibition rate of 95...
November 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29076071/bile-salt-hydrolase-mediated-inhibitory-effect-of-bacteroides-ovatus-on-growth-of-clostridium-difficile
#15
Soobin Yoon, Junsun Yu, Andrea McDowell, Sung Ho Kim, Hyun Ju You, GwangPyo Ko
Clostridium difficile infection (CDI) is one of the most common nosocomial infections. Dysbiosis of the gut microbiota due to consumption of antibiotics is a major contributor to CDI. Recently, fecal microbiota transplantation (FMT) has been applied to treat CDI. However, FMT has important limitations including uncontrolled exposure to pathogens and standardization issues. Therefore, it is necessary to evaluate alternative treatment methods, such as bacteriotherapy, as well as the mechanism through which beneficial bacteria inhibit the growth of C...
November 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29076070/the-nadph-oxidase-aonoxa-in-arthrobotrys-oligospora-functions-as-an-initial-factor-in-the-infection-of-caenorhabditis-elegans
#16
Xin Li, Ying-Qian Kang, Yan-Lu Luo, Ke-Qin Zhang, Cheng-Gang Zou, Lian-Ming Liang
Reactive oxygen species (ROS) produced by NADPH oxidases can serve as signaling molecules to regulate a variety of physiological processes in multi-cellular organisms. In the nematophagous fungus Arthrobotrys oligospora, we found that ROS were produced during conidial germination, hyphal extension, and trap formation in the presence of nematodes. Generation of an AoNoxA knockout strain demonstrated the crucial role of NADPH oxidase in the production of ROS in A. oligospora, with trap formation impaired in the AoNoxA mutant, even in the presence of the nematode host...
November 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29076069/magnetite-production-and-transformation-in-the-methanogenic-consortia-from-coastal-riverine-sediments
#17
Shiling Zheng, Bingchen Wang, Fanghua Liu, Oumei Wang
Minerals that contain ferric iron, such as amorphous Fe(III) oxides (A), can inhibit methanogenesis by competitively accepting electrons. In contrast, ferric iron reduced products, such as magnetite (M), can function as electrical conductors to stimulate methanogenesis, however, the processes and effects of magnetite production and transformation in the methanogenic consortia are not yet known. Here we compare the effects on methanogenesis of amorphous Fe (III) oxides (A) and magnetite (M) with ethanol as the electron donor...
November 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29076068/spirosoma-lituiforme-sp-nov-isolated-from-soil
#18
Weilan Li, Seung-Yeol Lee, Sangkyu Park, Byung-Oh Kim, Leonid N Ten, Hee-Young Jung
A Gram-staining-negative, non-motile, curved rod-shaped, aerobic bacterium, designated S1-2-4(T), was isolated from soil in Jeollabuk-do province, Republic of Korea, and was characterized taxonomically using a polyphasic approach. Comparative 16S rRNA gene sequence analysis showed that strain S1-2-4(T) was a member of the family Cytophagaceae and most closely related to 'Spirosoma radiotolerans' DG5A (97.2%), Spirosoma fluviale MSd3(T) (96.4%), and Spirosoma linguale DSM 74(T) (96.3%). The genomic DNA G + C content of strain S1-2-4(T) was 49...
November 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29076067/spirosoma-flavus-sp-nov-a-novel-bacterium-from-soil-of-jeju-island
#19
Nabil Elderiny, Seung-Yeol Lee, Sangkyu Park, In-Kyu Kang, Myung Kyum Kim, Dae Sung Lee, Leonid N Ten, Hee-Young Jung
A novel, Gram-staining negative, yellow pigmented bacterial strain, designated 15J11-2(T), was isolated from soil sample on Jeju Island, Republic of Korea. The strain was subjected to a taxonomic study using a polyphasic approach. The strain was able to grow at temperature range from 10°C to 30°C, pH 7-8, and in presence of 0-1% (w/v) NaCl. Comparative 16S rRNA gene sequence analysis showed that strain 15J11-2(T) belongs to the genus Spirosoma and levels of 16S rRNA gene sequence similarity ranged from 91...
November 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29076066/recombinant-baculovirus-based-vaccine-expressing-m2-protein-induces-protective-cd8-t-cell-immunity-against-respiratory-syncytial-virus-infection
#20
Jeong-Yoon Lee, Jun Chang
Respiratory syncytial virus (RSV) is an important cause of acute lower respiratory tract disease in infants, young children, immunocompromised individuals, and the elderly. However, despite ongoing efforts to develop an RSV vaccine, there is still no authorized RSV vaccine for humans. Baculovirus has attracted attention as a vaccine vector because of its ability to induce a high level of humoral and cellular immunity, low cytotoxicity against various antigens, and biological safety for humans. In this study, we constructed a recombinant baculovirus- based vaccine expressing the M2 protein of RSV under the control of cytomegalovirus promoter (Bac_RSVM2) to induce CD8(+) T-cell responses which play an important role in viral clearance, and investigated its protective efficacy against RSV infection...
November 2017: Journal of Microbiology / the Microbiological Society of Korea
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