88 results on '"Sanghyun Lim"'
Search Results
2. Characterization of the probiotic properties of Lacticaseibacillus rhamnosus LR6 isolated from the vaginas of healthy Korean women against vaginal pathogens
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Yusook Chung, Seung Beom Kang, Dooheon Son, Ji Young Lee, Myung Jun Chung, and Sanghyun Lim
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Lacticaseibacillus rhamnosus ,vaginal probiotics ,vaginal microbiome ,bacterial vaginosis ,vaginal candidiasis ,bacteriocin ,Microbiology ,QR1-502 - Abstract
The human microbiome exhibits intricate populations across the body, with the vaginal tract serving as an ecosystem characterized by the prevalence of the genus Lactobacillus. Disruptions in the vaginal microbiota, which are frequently linked to variables such as sexual activity, hormonal fluctuations, and excessive use of antibiotics, can result in vaginal dysbiosis and the development of diseases such as bacterial vaginosis (BV) and candidiasis. Lactobacillus species, owing to their capacity to create an acidic environment through the production of lactic acid, have a key function within this complex microbial community: they inhibit the growth of harmful microorganisms. This study aimed to investigate the genomic characteristics of L. rhamnosus LR6, a newly discovered strain isolated from the vaginal microbiota of 20 healthy women to assess its potential as a vaginal probiotic. We performed a comparative investigation of the genetic traits of L. rhamnosus using 45 publicly available genomes from various sources. We evaluated the genetic characteristics related to carbohydrate utilization, adhesion to host cells, and the presence of bacteriocin clusters. A comprehensive study was conducted by integrating in silico evaluations with experimental techniques to authenticate the physiological characteristics of strain LR6. We further used a rat model to assess the impact of L. rhamnosus LR6 administration on the changes in the gastrointestinal tract and the vaginal microbiome. The assessments revealed a significantly high inhibitory activity against pathogens, enhanced adherence to host cells, and high lactic acid production. Rat experiments revealed changes in both the fecal and vaginal microbiota; in treated rats, Firmicutes increased in both; Lactobacillaceae increased in the fecal samples; and Enterobacteriaceae decreased but Enterococcaceae, Streptococcaceae, and Morganellaceae increased in the vaginal samples. The study results provide evidence of the genetic characteristics and probiotic properties of LR6, and suggest that oral administration of L. rhamnosus LR6 can alter both gut and vaginal microbiome. Collectively, these findings establish L. rhamnosus LR6 as a highly promising candidate for improving vaginal health.
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- 2023
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3. Association between the / Ratio and Altered Body Mass Index after Bariatric Surgery
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Yoonhong Kim, Dooheon Son, Bu Kyung Kim, Ki Hyun Kim, Kyung Won Seo, Kyoungwon Jung, Seun Ja Park, Sanghyun Lim, and Jae Hyun Kim
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obesity ,bariatric surgery ,gastrointestinal microbiome ,Diseases of the endocrine glands. Clinical endocrinology ,RC648-665 - Abstract
Background Current evidence support that the gut microbiota plays a potential role in obesity. Bariatric surgery can reduce excess weight and decrease the risk of life-threatening weight-related health problems and may also influence gut microbiota. In this study, we aimed to investigate the changes in gut microbiota before and after bariatric surgery and evaluate the association of the gut microbial shift and altered body mass index (BMI) after bariatric surgery. Methods Between January 2019 and July 2020, stools from 58 patients scheduled for bariatric surgery were collected. Six months after bariatric surgery, stools from 22 of these patients were re-collected, and the changes in gut microbiota before and after bariatric surgery were evaluated. In addition, the differences in gut microbiota between patients with severe obesity (BMI >35 kg/m2, n=42) and healthy volunteers with normal BMI (18.8 to 22.8 kg/m2, n=41) were investigated. Results The gut microbiota of patients who underwent bariatric surgery showed increased α-diversity and differed β-diversity compared with those before surgery. Interestingly, Blautia was decreased and Bacteriodes was increased at the genus level after bariatric surgery. Further, the Blautia/Bacteroides ratio showed a positive correlation with BMI. To validate these results, we compared the gut microbiota from severely obese patients with high BMI with those from healthy volunteers and demonstrated that the Blautia/Bacteroides ratio correlated positively with BMI. Conclusion In the gut microbial analysis of patients who underwent bariatric surgery, we presented that the Blautia/Bacteroides ratio had changed after bariatric surgery and showed a positive correlation with BMI.
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- 2022
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4. Anti-Menopausal Effect of Soybean Germ Extract and Lactobacillus gasseri in the Ovariectomized Rat Model
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Sun-Hee Lee, Tae-Joong Lim, Eun Ju Yun, Kyoung Heon Kim, and Sanghyun Lim
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menopause ,soybean germ extract ,isoflavone ,probiotics ,lactic acid bacteria ,aglycone ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Menopause is a significant phase in a woman’s life. Menopausal symptoms can affect overall well-being and quality of life. Conventionally, hormone replacement therapy (HRT) is used to alleviate menopausal symptoms; however, depending on the conditions, HRT may lead to side effects, necessitating the exploration of alternative therapies with fewer side effects. In this study, we investigated the effects of a combination of soybean germ extract (S30) containing 30% (w/w) isoflavone and a probiotic, Lactobacillus gasseri (LGA1), on menopausal conditions in an ovariectomized (OVX) rat model. We evaluated the impact of S30+LGA on body weight, estrogen markers, uterine and bone health, vascular markers, and neurotransmitter levels. The results revealed that treatment with S30+LGA1 significantly improved body weight and uterine and bone health. Moreover, S30+LGA1 demonstrated promising effects on lipid profile, liver function, and vascular markers and positively impacted serotonin and norepinephrine levels, indicating potential mood-enhancing effects. In conclusion, S30+LGA1, possessing anti-menopausal effects in vitro and in vivo, can be recommended as a soy-based diet, which offers various health benefits, especially for menopausal women.
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- 2023
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5. Distribution of bacteriocin genes in the lineages of Lactiplantibacillus plantarum
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Sungmi Choi, Min-gyung Baek, Myung-Jun Chung, Sanghyun Lim, and Hana Yi
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Medicine ,Science - Abstract
Abstract Lactiplantibacillus plantarum, previously named “Lactobacillus plantarum,” is found in a wide variety of environments exhibiting a high level of intraspecies genetic diversity. To investigate the strain diversity, we performed comparative genomic analyses of the 54 complete genome sequences. The results revealed that L. plantarum subsp. plantarum was split into three lineages, A, B and C. Of the genes beneficial for probiotic activity, only those associated with the biosynthesis of plantaricin (Pln), an L. plantarum-specific bacteriocin, were found to be significantly different among the lineages. The genes related to the biosynthesis of plnE/F were conserved throughout the three lineages, whereas the outgroups did not possess any Pln-producing genes. In lineage C, the deepest and ancestral type branch, plnE/F genes, were well conserved. In lineage B, loss of gene function was observed due to mobile elements in the pln loci. In lineage A, most strains were predicted to produce more than one type of Pln by possessing diverse Pln-encoding genes. These results showed the presence of functional diversity arising from the trifurcating evolution in L. plantarum subsp. plantarum and demonstrated that Pln is an indicator for differentiating the three lineages.
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- 2021
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6. Lactobacillus Probiotics Improve Vaginal Dysbiosis in Asymptomatic Women
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AbuZar Ansari, Dooheon Son, Young Min Hur, Sunwha Park, Young-Ah You, Soo Min Kim, Gain Lee, Seungbeom Kang, Yusook Chung, Sanghyun Lim, and Young Ju Kim
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Lactobacillus ,probiotics ,cervicovaginal fluid ,vaginal microbiota ,vaginal dysbiosis ,bacterial vaginosis ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Vaginal dysbiosis can lead to serious infections in asymptomatic women. Lactobacillus probiotics (LBPs) are being investigated as a promising therapy for reversing vaginal microbiota dysbiosis. This study aimed to investigate whether administering LBPs could improve vaginal dysbiosis and facilitate the colonization of Lactobacillus species in asymptomatic women. 36 asymptomatic women were classified based on the Nugent score as Low-NS (n = 26) and High-NS (n = 10) groups. A combination of Lactobacillus acidophilus CBT LA1, Lactobacillus rhamnosus CBT LR5, and Lactobacillus reuteri CBT LU4 was administered orally for 6 weeks. The study found that among women with a High-NS, 60% showed improved vaginal dysbiosis with a Low-NS after LBP intake, while four retained a High-NS. Among women with a Low-NS, 11.5 % switched to a High-NS. Genera associated with vaginal dysbiosis were positively correlated with the alpha diversity or NS, while a negative correlation was observed between Lactobacillus and the alpha diversity and with the NS. Vaginal dysbiosis in asymptomatic women with an HNS improved after 6 weeks of LBP intake, and qRT-PCR revealed the colonization of Lactobacillus spp. in the vagina. These results suggested that oral administration of this LBP could improve vaginal health in asymptomatic women with an HNS.
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- 2023
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7. REEP5 depletion causes sarco-endoplasmic reticulum vacuolization and cardiac functional defects
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Shin-Haw Lee, Sina Hadipour-Lakmehsari, Harsha R. Murthy, Natalie Gibb, Tetsuaki Miyake, Allen C. T. Teng, Jake Cosme, Jessica C. Yu, Mark Moon, SangHyun Lim, Victoria Wong, Peter Liu, Filio Billia, Rodrigo Fernandez-Gonzalez, Igor Stagljar, Parveen Sharma, Thomas Kislinger, Ian C. Scott, and Anthony O. Gramolini
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Science - Abstract
The sarcoplasmic (SR) and endoplasmic reticulum (ER) are involved in heart development but how this arises is unclear. Here, the authors show that loss of a SR/ER protein REEP5 causes membrane destabilization and decreased cardiac myocyte contractility, with cardiac dysfunction in mutant mouse and zebrafish models.
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- 2020
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8. Benefits of Probiotic Pretreatment on the Gut Microbiota and Minor Complications after Bowel Preparation for Colonoscopy: A Randomized Double-Blind, Placebo-Controlled Pilot Trial
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Dooheon Son, Youn Jung Choi, Min Young Son, Won Moon, Seun Ja Park, Sanghyun Lim, and Jae Hyun Kim
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probiotics ,gut microbiota ,bowel preparation ,colonoscopy ,complication ,Nutrition. Foods and food supply ,TX341-641 - Abstract
The aim of this study was to evaluate the effects of probiotic pretreatment on the alteration and recovery of gut microbiota after bowel preparation and its correlation with minor complications. This was a randomized, double-blind, placebo-controlled pilot trial that included participants 40–65 years of age. Participants were randomly provided probiotics (active group) or placebo (placebo group) for 1 month before the colonoscopy and their feces collected. A total of 51 participants were included in the present study (26 in the active group and 25 in the placebo group). In the active group, the microbial diversity, evenness, and distribution were not significantly changed between before and after bowel preparation, but did change in the placebo group. The number of gut microbiota that decreased after bowel preparation in the active group was lower than in the placebo group. On the seventh day after colonoscopy, the gut microbiota in the active group was restored to almost the same level as before bowel preparation. In addition, we identified that several strains were assumed as key microbiota in early colonization and some taxa were increased only in the active group after bowel preparation. In multivariate analysis, taking probiotics before bowel preparation was identified as a significant factor for decreasing the duration of minor complications (odds ratio 0.13, 95% confidence interval 0.02–0.60, p = 0.027). Probiotic pretreatment had benefits on the alteration and recovery of gut microbiota and possible complications after bowel preparation. Probiotics may also aid in the early colonization of key microbiota.
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- 2023
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9. Is stool frequency associated with the richness and community composition of gut microbiota?
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Hye Jung Kwon, Jong Hyun Lim, Dongmin Kang, Sanghyun Lim, Seun Ja Park, and Jae Hyun Kim
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Feces ,Gastrointestinal microbiome ,Composition ,Distribution ,Medicine ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Background/Aims Recently, a number of studies have reported that the gut microbiota could contribute to human conditions, including obesity, inflammation, cancer development, and behavior. We hypothesized that the composition and distribution of gut microbiota are different according to stool frequency, and attempted to identify the association between gut microbiota and stool frequency. Methods We collected fecal samples from healthy individuals divided into 3 groups according to stool frequency: group 1, a small number of defecation (≤2 times/wk); group 2, normal defecation (1 time/day or 1 time/2 day); and group 3, a large number of defecation (≥2–3 times/day). We evaluated the composition and distribution of the gut microbiota in each group via 16S rRNA-based taxonomic profiling of the fecal samples. Results Fecal samples were collected from a total of 60 individuals (31 men and 29 women, aged 34.1±5.88 years), and each group comprised 20 individuals. The microbial richness of group 1 was significantly higher than that of group 3 and tended to decrease with increasing number of defecation (P
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- 2019
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10. Regulation of Alcohol and Acetaldehyde Metabolism by a Mixture of Lactobacillus and Bifidobacterium Species in Human
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Su-Jin Jung, Ji-Hyun Hwang, Eun-Ock Park, Seung-Ok Lee, Yun-Jo Chung, Myung-Jun Chung, Sanghyun Lim, Tae-Joong Lim, Yunhi Ha, Byung-Hyun Park, and Soo-Wan Chae
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probiotics ,Lactobacillus ,Bifidobacterium ,alcohol ,acetaldehyde ,ALDH2 gene ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Excessive alcohol consumption is one of the most significant causes of morbidity and mortality worldwide. Alcohol is oxidized to toxic and carcinogenic acetaldehyde by alcohol dehydrogenase (ADH) and further oxidized to a non-toxic acetate by aldehyde dehydrogenase (ALDH). There are two major ALDH isoforms, cytosolic and mitochondrial, encoded by ALDH1 and ALDH2 genes, respectively. The ALDH2 polymorphism is associated with flushing response to alcohol use. Emerging evidence shows that Lactobacillus and Bifidobacterium species encode alcohol dehydrogenase (ADH) and acetaldehyde dehydrogenase (ALDH) mediate alcohol and acetaldehyde metabolism, respectively. A randomized, double-blind, placebo-controlled crossover clinical trial was designed to study the effects of Lactobacillus and Bifidobacterium probiotic mixture in humans and assessed their effects on alcohol and acetaldehyde metabolism. Here, twenty-seven wild types (ALDH2*1/*1) and the same number of heterozygotes (ALDH2*2/*1) were recruited for the study. The enrolled participants were randomly divided into either the probiotic (Duolac ProAP4) or the placebo group. Each group received a probiotic or placebo capsule for 15 days with subsequent crossover. Primary outcomes were measurement of alcohol and acetaldehyde in the blood after the alcohol intake. Blood levels of alcohol and acetaldehyde were significantly downregulated by probiotic supplementation in subjects with ALDH2*2/*1 genotype, but not in those with ALDH2*1/*1 genotype. However, there were no marked improvements in hangover score parameters between test and placebo groups. No clinically significant changes were observed in safety parameters. These results suggest that Duolac ProAP4 has a potential to downregulate the alcohol and acetaldehyde concentrations, and their effects depend on the presence or absence of polymorphism on the ALDH2 gene.
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- 2021
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11. Complete Genome Sequence and Genomic Characterization of Lactobacillus acidophilus LA1 (11869BP)
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Won-Hyong Chung, Jisu Kang, Mi Young Lim, Tae-joong Lim, Sanghyun Lim, Seong Woon Roh, and Young-Do Nam
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probiotics ,Lactobacillus acidophilus ,Salmonella infection ,genome sequence ,PacBio ,Therapeutics. Pharmacology ,RM1-950 - Published
- 2018
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12. Approximate Subject Specific Pseudo MRI from an Available MRI Dataset for MEG Source Imaging
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Bakul Gohel, Sanghyun Lim, Min-Young Kim, Hyukchan Kwon, and Kiwoong Kim
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MRI ,pseudo MRI ,ICP registration ,MEG source imaging ,sourcemodel ,headmodel ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Computation of headmodel and sourcemodel from the subject's MRI scan is an essential step for source localization of magnetoencephalography (MEG) (or EEG) sensor signals. In the absence of a real MRI scan, pseudo MRI (i.e., associated headmodel and sourcemodel) is often approximated from an available standard MRI template or pool of MRI scans considering the subject's digitized head surface. In the present study, we approximated two types of pseudo MRI (i.e., associated headmodel and sourcemodel) using an available pool of MRI scans with the focus on MEG source imaging. The first was the first rank pseudo MRI; that is, the MRI scan in the dataset having the lowest objective registration error (ORE) after being registered (rigid body transformation with isotropic scaling) to the subject's digitized head surface. The second was the averaged rank pseudo MRI that is generated by averaging of headmodels and sourcemodels from multiple MRI scans respectively, after being registered to the subject's digitized head surface. Subject level analysis showed that the mean upper bound of source location error for the approximated sourcemodel in reference to the real one was 10 ± 3 mm for the averaged rank pseudo MRI, which was significantly lower than the first rank pseudo MRI approach. Functional group source response in the brain to visual stimulation in the form of event-related power (ERP) at the time latency of peak amplitude showed noticeably identical source distribution for first rank pseudo MRI, averaged rank pseudo MRI, and real MRI. The source localization error for functional peak response was significantly lower for averaged rank pseudo MRI compared to first rank pseudo MRI. We conclude that it is feasible to use approximated pseudo MRI, particularly the averaged rank pseudo MRI, as a substitute for real MRI without losing the generality of the functional group source response.
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- 2017
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13. Evaluation of Phase-Amplitude Coupling in Resting State Magnetoencephalographic Signals: Effect of Surrogates and Evaluation Approach
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Bakul Gohel, Sanghyun Lim, Min-Young Kim, Kyung-min An, Ji-Eun Kim, Hyukchan Kwon, and Kiwoong Kim
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MEG ,resting state ,phase-amplitude coupling ,neural information processing ,cross frequency coupling ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Phase-amplitude coupling (PAC) plays an important role in neural communication and computation. Interestingly, recent studies have indicated the presence of ubiquitous PAC phenomenon even during the resting state. Despite the importance of PAC phenomenon, estimation of significant physiological PAC is challenging because of the lack of appropriate surrogate measures to control false positives caused by non-physiological PAC. Therefore, in the present study, we evaluated PAC phenomenon during resting-state magnetoencephalography (MEG) signal and considered various surrogate measures and computational approaches widely used in the literature in addition to proposing new ones. We evaluated PAC phenomenon over the entire length of the MEG signal and for multiple shorter time segments. The results indicate that the extent of PAC phenomenon mainly depends on the surrogate measures and PAC computational methods used, as well as the evaluation approach. After a careful and critical evaluation, we found that resting-state MEG signals failed to exhibit ubiquitous PAC phenomenon, contrary to what has been suggested previously.
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- 2016
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14. Location Based One-Time Conference Protocol Without Personal Information.
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Jiyoung Lim and Sanghyun Lim
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- 2018
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15. Bioconversion of Rutin in Tartary Buckwheat by the Korean Indigenous Probiotics
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Chang Kwon, Jong Won Kim, Young Kwang Park, Seungbeom Kang, Myung Jun Chung, Su Jeong Kim, and Sanghyun Lim
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Applied Microbiology and Biotechnology ,Microbiology ,Biotechnology - Published
- 2023
16. Bioconversion of Ginsenosides by Bifidobacterium CBT BG7, BR3 and BL3
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Jiwon Choi, Chang Kwon, Jong Won Kim, Myung Jun Chung, Jong Hyun Yoon, and Sanghyun Lim
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Applied Microbiology and Biotechnology ,Microbiology ,Biotechnology - Published
- 2022
17. Expanding Reaction Profile of Allyl Carboxylates via 1,2-Radical Migration (RaM): Visible-Light-Induced Phosphine-Catalyzed 1,3-Carbobromination of Allyl Carboxylates
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Gaoyuan Zhao, Sanghyun Lim, Djamaladdin G. Musaev, and Ming-Yu Ngai
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Colloid and Surface Chemistry ,General Chemistry ,Biochemistry ,Catalysis - Published
- 2023
18. A split face study on the effect of an anti-acne product containing fermentation products of Enterococcus faecalis CBT SL-5 on skin microbiome modification and acne improvement
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Hye Sung, Han, Sun Hye, Shin, Bo-Yun, Choi, Nayeon, Koo, Sanghyun, Lim, Dooheon, Son, Myung Jun, Chung, Kui Young, Park, and Woo Jun, Sul
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Treatment Outcome ,Microbiota ,Acne Vulgaris ,Fermentation ,Enterococcus faecalis ,Dysbiosis ,Humans ,General Medicine ,Applied Microbiology and Biotechnology ,Microbiology ,Phylogeny - Abstract
Antibiotic-resistant Cutibacterium acnes and dysbiosis of the skin microbiome are of increasing concern in acne treatment. Enterococcus faecalis, a widely used probiotic, has shown benefits for acne treatment by exerting antimicrobial activity against C. acnes. Therefore, this study aimed to investigate the efficacy and safety of an E. faecalis CBT SL-5-extract-containing lotion in patients with mild-to-moderate acne. Twenty patients were enrolled in this randomized, placebo-controlled, split-face comparative study. Patients were treated with E. faecalis lotion on one side of the face and a vehicle lotion on the other side for 4 weeks. The efficacy outcome measures included improvement in the investigators' assessment of acne severity, patient satisfaction, changes in skin parameters and diversity of the skin microbiome. The investigators' assessment score was significantly improved on the test side compared to the control side, after 2 weeks (p = 0.009) and 6 weeks (p0.0005). However, TEWL and skin hydration were not significantly different between the two groups. The phylogenetic diversity of the skin microbiota decreased over time in the skin samples of test side. In conclusion, E. faecalis CBT SL-5 extract can be a feasible and well-tolerated option for improving acne severity and skin microbiome dysbiosis in mild-to-moderate acne patients.
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- 2022
19. A study on the pelletizing condition for roll compaction of powdered radioactive wastes
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Sun-Il Kim, Kihong Kim, Jong-Soon Song, and SangHyun Lim
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Materials science ,Waste management ,General Chemical Engineering ,Mixing (process engineering) ,Compaction ,Pellets ,Radioactive waste ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Pelletizing ,020401 chemical engineering ,Volume (thermodynamics) ,Pellet ,0204 chemical engineering ,0210 nano-technology ,Waste disposal - Abstract
Dried powder of radioactive wastes cannot be disposed of as such unless it is solidified by an appropriate solidification agent. However, the volume of the solidified waste form increases to a large extent due to certain limitations (incorporation ratio) while mixing the wastes with a solidification agent. As a result, the cost of waste disposal increases and filling up the disposal facility's capacity occurs fast. To address this problem, roll compaction technology can be used to reduce the physical volume of the powdered wastes. Powdered wastes (contaminated soil and bio-shield concrete) were converted to rigid pellets of certain shape and size (H 6.5 x W 9.4 mm) by a special roll compactor. The operating parameters (hydraulic pressure, roll speed, feeding rate, roll gap) of the roll compactor were evaluated, and the volume reduction factor of each waste powder and the strength of the pellet were estimated.
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- 2021
20. Effects of multi-species probiotic supplementation on alcohol metabolism in rats
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Jong Hyun Yoon, Myung Jun Chung, Tae-Joong Lim, and Sanghyun Lim
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Male ,Lactobacillus casei ,Alcohol Drinking ,ved/biology.organism_classification_rank.species ,Alcohol ,Acetaldehyde ,Bifidobacterium breve ,Pharmacology ,Real-Time Polymerase Chain Reaction ,Lactobacillus gasseri ,Applied Microbiology and Biotechnology ,Microbiology ,law.invention ,Rats, Sprague-Dawley ,03 medical and health sciences ,chemistry.chemical_compound ,Probiotic ,Bacterial Proteins ,Bifidobacterium animalis ,law ,Animals ,Ethanol metabolism ,030304 developmental biology ,Alcohol dehydrogenase ,0303 health sciences ,Ethanol ,biology ,030306 microbiology ,ved/biology ,Probiotics ,Alcohol Dehydrogenase ,Alanine Transaminase ,General Medicine ,biology.organism_classification ,Aldehyde Oxidoreductases ,Rats ,Lacticaseibacillus casei ,RNA, Bacterial ,chemistry ,Dietary Supplements ,biology.protein - Abstract
Probiotics are known to protect against liver damage induced by the alcohol and acetaldehyde accumulation associated with alcohol intake. However, there have been few studies of the direct effect of probiotics on alcohol metabolism, and the types of probiotics that were previously analyzed were few in number. Here, we investigated the effects of 19 probiotic species on alcohol and acetaldehyde metabolism. Four probiotic species that had a relatively high tolerance to alcohol and metabolized alcohol and acetaldehyde effectively were identified: Lactobacillus gasseri CBT LGA1, Lactobacillus casei CBT LC5, Bifidobacterium lactis CBT BL3, and Bifidobacterium breve CBT BR3. These species also demonstrated high mRNA expression of alcohol and acetaldehyde dehydrogenases. ProAP4, a mixture of these four probiotics species and excipient, was then administered to rats for 2 weeks in advance of acute alcohol administration. The serum alcohol and acetaldehyde concentrations were significantly lower in the ProAP4-administered group than in the control and excipient groups. Thus, the administration of ProAP4, containing four probiotic species, quickly lowers blood alcohol and acetaldehyde concentrations in an alcohol and acetaldehyde dehydrogenasedependent manner. Furthermore, the serum alanine aminotransferase activity, which is indicative of liver damage, was significantly lower in the ProAP4 group than in the control group. The present findings suggest that ProAP4 may be an effective means of limiting alcohol-induced liver damage.
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- 2021
21. Problem Solving Capabilty of Transportation Technology in Technology Education in Middle School in Korea
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Sangbong Yi and Sanghyun Lim
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Technology education ,Engineering ,Engineering management ,business.industry ,Transportation technology ,business - Published
- 2020
22. Effect of probiotics on obesity-related markers per enterotype: a double-blind, placebo-controlled, randomized clinical trial
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Myung-Jun Chung, Sanghyun Lim, Young-Do Nam, Kyungsun Han, Hojun Kim, Eun-Ji Song, Tae-Joong Lim, and Myung Hee Nam
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0301 basic medicine ,medicine.medical_specialty ,Waist ,Placebo ,Gastroenterology ,law.invention ,03 medical and health sciences ,Probiotic ,law ,Internal medicine ,Drug Discovery ,medicine ,Prevotella ,Feces ,030109 nutrition & dietetics ,biology ,business.industry ,Research ,Health Policy ,Biochemistry (medical) ,biology.organism_classification ,medicine.disease ,Obesity ,030104 developmental biology ,Enterotype ,business ,Body mass index - Abstract
BACKGROUND: Prevention and improvement of disease symptoms are important issues, and probiotics are suggested as a good treatment for controlling the obesity. Human gut microbiota has different community structures. Because gut microbial composition is assumed to be linked to probiotic function, this study evaluated the efficacy of probiotics on obesity-related clinical markers according to gut microbial enterotype. METHODS: Fifty subjects with body mass index over 25 kg/m(2) were randomly assigned to either the probiotic or placebo group. Each group received either unlabeled placebo or probiotic capsules for 12 weeks. Body weight, waist circumference, and body composition were measured every 3 weeks. Using computed tomography, total abdominal fat area and visceral fat area were measured. Blood and fecal samples were collected before and after the intervention for biochemical parameters and gut microbial compositions analysis. RESULTS: Gut microbial compositions of all the subjects were classified into two enterotypes according to Prevotella/Bacteroides ratio. The fat percentage, blood glucose, and insulin significantly increased in the Prevotella-rich enterotype of the placebo group. The obesity-related markers, such as waist circumference, total fat area, visceral fat, and ratio of visceral to subcutaneous fat area, were significantly reduced in the probiotic group. The decrease of obesity-related markers was greater in the Prevotella-rich enterotype than in the Bacteroides-rich enterotype. CONCLUSION: Administration of probiotics improved obesity-related markers in obese people, and the efficacy of probiotics differed per gut microbial enterotype and greater responses were observed in the Prevotella-dominant enterotype.
- Published
- 2020
23. REEP5 depletion causes sarco-endoplasmic reticulum vacuolization and cardiac functional defects
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Tetsuaki Miyake, Filio Billia, Thomas Kislinger, Peter Liu, Natalie Gibb, Mark Moon, Parveen Sharma, Shin-Haw Lee, Igor Stagljar, Allen C. T. Teng, Jake Cosme, Ian C. Scott, Anthony O. Gramolini, Victoria Wong, Jessica C. Yu, Sanghyun Lim, Sina Hadipour-Lakmehsari, Harsha R. Murthy, and Rodrigo Fernandez-Gonzalez
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0301 basic medicine ,General Physics and Astronomy ,Gene Knockout Techniques ,Mice ,heart function ,0302 clinical medicine ,Myocyte ,Myocytes, Cardiac ,lcsh:Science ,Zebrafish ,Cells, Cultured ,cardiac ER stress ,Multidisciplinary ,biology ,Chemistry ,Heart ,heart development ,Endoplasmic Reticulum Stress ,Cell biology ,Sarcoplasmic Reticulum ,cardiovascular system ,medicine.drug ,cardiac myocytes ,Heart Diseases ,Science ,General Biochemistry, Genetics and Molecular Biology ,Contractility ,03 medical and health sciences ,In vivo ,medicine ,Animals ,Humans ,Gene Silencing ,Calcium metabolism ,Endoplasmic reticulum ,Membrane Proteins ,SR organization ,Intracellular Membranes ,General Chemistry ,Microreview ,zebrafish ,biology.organism_classification ,Myocardial Contraction ,030104 developmental biology ,Vacuolization ,Verapamil ,Calcium ,lcsh:Q ,030217 neurology & neurosurgery - Abstract
The sarco-endoplasmic reticulum (SR/ER) is the largest membrane-bound organelle in eukaryotic cells and plays important roles in essential cellular processes, and in development and progression of many cardiac diseases. However, many aspects of its structural organization remain largely unknown, particularly in cells with a highly differentiated SR/ER network. In a recently published study led by Lee et al. (Nat Commun 11(1):965), we reported a cardiac enriched SR/ER membrane protein REEP5 that is centrally involved in regulating SR/ER organization and cellular stress responses in cardiac myocytes. In vitro REEP5 depletion in mouse cardiac myocytes resulted in SR/ER membrane destabilization and luminal vacuolization along with decreased myocyte contractility and disrupted Ca2+ cycling. Further, in vivo CRISPR/Cas9-mediated REEP5 loss-of-function zebrafish mutants showed sensitized cardiac dysfunction to heart failure induction upon short-term verapamil treatment. Additionally, in vivo adeno-associated viral (AAV9)-induced REEP5 depletion in the mouse demonstrated cardiac dysfunction with dilated cardiac chambers, increased cardiac fibrosis, and reduced ejection fraction. These results demonstrate the critical role of REEP5 in SR/ER organization and function.
- Published
- 2020
24. Association Between the Blautia/Bacteroides Ratio and Altered Body Mass Index After Bariatric Surgery
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Yoonhong Kim, Dooheon Son, Bu Kyung Kim, Ki Hyun Kim, Kyung Won Seo, Kyoungwon Jung, Seun Ja Park, Sanghyun Lim, and Jae Hyun Kim
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Endocrinology ,Endocrinology, Diabetes and Metabolism ,Bacteroides ,Bariatric Surgery ,Humans ,Obesity ,digestive system ,Body Mass Index ,Gastrointestinal Microbiome - Abstract
Current evidence support that the gut microbiota plays a potential role in obesity. Bariatric surgery can reduce excess weight and decrease the risk of life-threatening weight-related health problems and may also influence gut microbiota. In this study, we aimed to investigate the changes in gut microbiota before and after bariatric surgery and evaluate the association of the gut microbial shift and altered body mass index (BMI) after bariatric surgery. Between January 2019 and July 2020, stools from 58 patients scheduled for bariatric surgery were collected. Six months after bariatric surgery, stools from 22 of these patients were re-collected, and the changes in gut microbiota before and after bariatric surgery were evaluated. In addition, the differences in gut microbiota between patients with severe obesity (BMI > 35, n=42) and healthy volunteers with normal BMI (18.8 – 22.8, n=41) were investigated. The gut microbiota of patients who underwent bariatric surgery showed increased α-diversity and differed β-diversity compared with those before surgery. Interestingly, Blautia was decreased and Bacteriodes was increased at the genus level after bariatric surgery. Further, the Blautia/Bacteroides ratio showed a positive correlation with BMI. These results were similar regardless of the surgery type (Roux-en-Y gastric bypass or sleeve gastrectomy). To validate these results, we compared the gut microbiota from severely obese patients with high BMI with those from healthy volunteers and demonstrated that the Blautia/Bacteroides ratio correlated positively with BMI. In the gut microbial analysis of patients who underwent bariatric surgery, we identified that the Blautia/Bacteroides ratio had changed after bariatric surgery and showed a positive correlation with BMI. Based on these results, we suggest that bariatric surgery could change the gut microbiota and specific microbiomes might have a potential role in obese patients.
- Published
- 2021
25. Erratum: Correction of Figures. Association between the Blautia/Bacteroides Ratio and Altered Body Mass Index after Bariatric Surgery
- Author
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Yoonhong Kim, Dooheon Son, Bu Kyung Kim, Ki Hyun Kim, Kyung Won Seo, Kyoungwon Jung, Seun Ja Park, Sanghyun Lim, and Jae Hyun Kim
- Subjects
Endocrinology ,Endocrinology, Diabetes and Metabolism - Published
- 2022
26. A Study on the Pelletization of Powdered Radioactive Waste by Roll Compaction
- Author
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Jong Soon Song, Min Young Jung, Ki Hong Kim, and SangHyun Lim
- Subjects
Cement ,Waste management ,Renewable Energy, Sustainability and the Environment ,Compaction ,Radioactive waste ,Human decontamination ,Management, Monitoring, Policy and Law ,Particulates ,Pelletizing ,Nuclear decommissioning ,Fuel Technology ,Nuclear Energy and Engineering ,Slurry ,Environmental science ,Waste Management and Disposal - Abstract
Disposal nonconformity of radioactive wastes refers to radioactive wastes that need to be treated, solidified and packaged during operation or decommissioning of NPPs, and are typically exemplified by particulate radioactive wastes with dispersion characteristics. These wastes include the dried powders of concentrated wastes generated in the process of operating NPPs, slurry and sludge, various powdered wastes generated in the decommissioning process (crushed concrete, decontamination sludge, etc.), and fine radioactive soil, which is not easy to decontaminate. As these particulate wastes must be packaged so that they become non-dispersive, they are solidified with solidification agents such as cement and polymer. If they are treated using existing solidification methods, however, the volume of the final wastes will increase. This drawback may increase the disposal cost and reduce the acceptability of disposal sites. Accordingly, to solve these problems, this study investigates the pelletization of particulate radioactive wastes in order to reduce final waste volume.
- Published
- 2019
27. Randomized, Double-blind, Placebo-controlled Study of a Multispecies Probiotic Mixture in Nonalcoholic Fatty Liver Disease
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Sang Bong Ahn, Dae Won Jun, Myung Jun Chung, Sanghyun Lim, Bo Kyeong Kang, and Jong Hyun Lim
- Subjects
0301 basic medicine ,Adult ,Male ,medicine.medical_specialty ,Placebo-controlled study ,lcsh:Medicine ,Placebo ,Gastroenterology ,Article ,law.invention ,Double blind ,03 medical and health sciences ,Probiotic ,chemistry.chemical_compound ,Young Adult ,0302 clinical medicine ,Randomized controlled trial ,Double-Blind Method ,law ,Non-alcoholic Fatty Liver Disease ,Internal medicine ,Nonalcoholic fatty liver disease ,Medicine ,Humans ,lcsh:Science ,Triglycerides ,Aged ,Multidisciplinary ,Triglyceride ,business.industry ,Probiotics ,lcsh:R ,Middle Aged ,medicine.disease ,Obesity ,030104 developmental biology ,chemistry ,Adipose Tissue ,Liver ,Female ,lcsh:Q ,business ,030217 neurology & neurosurgery - Abstract
The intestinal microbiota is closely associated with the development of obesity and nonalcoholic fatty liver disease (NAFLD). This study investigated the effects of probiotic treatment on visceral fat area (VFA) and intrahepatic fat (IHF) fraction in NAFLD. Sixty-eight obese NAFLD patients (>5% proton density fat fraction [PDFF] on magnetic resonance imaging [MRI]) were randomized to probiotic and placebo groups for 12 weeks. The probiotic mixture included 6 bacterial species. VFA and IHF were measured using the MRI-PDFF technique. Body weight and total body fat were reduced in the probiotic group but not in the placebo group. The mean IHF fraction was reduced after 12 weeks of treatment in the probiotic group compared to that at baseline (from 16.3 ± 15.0% to 14.1 ± 7.7%, p = 0.032) but was not reduced in the placebo group. The decrease in IHF (mean difference: −2.61%, p = 0.012) was also greater in the probiotic group than in the placebo group. Reduction of triglyceride was greater in the probiotic treatment group than in the placebo group (mean difference: −34.0 mg/dl, p = 0.0033). However, the changes in IHF percentage and triglyceride levels were not different between placebo and control groups after adjusting for changes in body weight. Treatment with probiotics for 12 weeks resulted in significant reduction in IHF and body weight in obese NAFLD patients.
- Published
- 2019
28. Is stool frequency associated with the richness and community composition of gut microbiota?
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Sanghyun Lim, Hye Jung Kwon, Seun Ja Park, Jong Hyun Lim, Jae Hyun Kim, and Dongmin Kang
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Firmicutes ,Physiology ,lcsh:Medicine ,Gut flora ,Distribution ,03 medical and health sciences ,Feces ,0302 clinical medicine ,fluids and secretions ,Medicine ,lcsh:RC799-869 ,Gastrointestinal microbiome ,Bifidobacterium ,biology ,business.industry ,lcsh:R ,Gastroenterology ,Bacteroidetes ,Functional Bowel Disorders ,biology.organism_classification ,medicine.disease ,Obesity ,030220 oncology & carcinogenesis ,Defecation ,030211 gastroenterology & hepatology ,lcsh:Diseases of the digestive system. Gastroenterology ,Original Article ,Species richness ,business ,Composition - Abstract
BACKGROUND/AIMS Recently, a number of studies have reported that the gut microbiota could contribute to human conditions, including obesity, inflammation, cancer development, and behavior. We hypothesized that the composition and distribution of gut microbiota are different according to stool frequency, and attempted to identify the association between gut microbiota and stool frequency. METHODS We collected fecal samples from healthy individuals divided into 3 groups according to stool frequency: group 1, a small number of defecation (≤2 times/wk); group 2, normal defecation (1 time/day or 1 time/2 day); and group 3, a large number of defecation (≥2-3 times/day). We evaluated the composition and distribution of the gut microbiota in each group via 16S rRNA-based taxonomic profiling of the fecal samples. RESULTS Fecal samples were collected from a total of 60 individuals (31 men and 29 women, aged 34.1±5.88 years), and each group comprised 20 individuals. The microbial richness of group 1 was significantly higher than that of group 3 and tended to decrease with increasing number of defecation (P
- Published
- 2019
29. Sad faces increase the heartbeat-associated interoceptive information flow within the salience network: a MEG study
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Bumseok Jeong, Hyeong-Dong Park, Kiwoong Kim, Hyukchan Kwon, Min-Young Kim, Dong Woo Shin, Ko Woon Kim, Sanghyun Lim, and Jaejoong Kim
- Subjects
0301 basic medicine ,Adult ,Male ,magnetoencephalography ,Heartbeat ,media_common.quotation_subject ,brain ,Emotions ,emotion ,lcsh:Medicine ,perception ,Insular cortex ,Article ,Interoception ,03 medical and health sciences ,0302 clinical medicine ,granger causality ,Face perception ,Heart Rate ,Perception ,neural responses ,medicine ,Humans ,lcsh:Science ,Anterior cingulate cortex ,media_common ,Multidisciplinary ,medicine.diagnostic_test ,lcsh:R ,Magnetoencephalography ,body ,Magnetic Resonance Imaging ,anterior cingulate cortex ,potentials ,030104 developmental biology ,medicine.anatomical_structure ,insular cortex ,Female ,lcsh:Q ,Psychology ,Insula ,Neuroscience ,Somatic marker hypothesis ,Facial Recognition ,030217 neurology & neurosurgery - Abstract
The somatic marker hypothesis proposes that the cortical representation of visceral signals is a crucial component of emotional processing. No previous study has investigated the information flow among brain regions that process visceral information during emotional perception. In this magnetoencephalography study of 32 healthy subjects of either sex, heartbeat-evoked responses (HERs), which reflect the cortical processing of heartbeats, were modulated by the perception of a sad face. The modulation effect was localized to the prefrontal cortices, the globus pallidus, and an interoceptive network including the right anterior insula (RAI) and dorsal anterior cingulate cortex (RdACC). Importantly, our Granger causality analysis provides the first evidence for the increased flow of heartbeat information from the RAI to the RdACC during sad face perception. Moreover, using a surrogate R-peak analysis, we have shown that this HER modulation effect was time-locked to heartbeats. These findings advance the understanding of brain-body interactions during emotional processing.
- Published
- 2019
30. Erratum to: A split face study on the effect of an anti-acne product containing fermentation products of Enterococcus faecalis CBT SL-5 on skin microbiome modification and acne improvement
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Hye Sung Han, Sun Hye Shin, Bo-Yun Choi, Nayeon Koo, Sanghyun Lim, Dooheon Son, Myung Jun Chung, Kui Young Park, and Woo Jun Sul
- Subjects
General Medicine ,Applied Microbiology and Biotechnology ,Microbiology - Published
- 2022
31. Regulation of Alcohol and Acetaldehyde Metabolism by a Mixture of Lactobacillus and Bifidobacterium Species in Human
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Sanghyun Lim, Byung-Hyun Park, Myung-Jun Chung, Soo-Wan Chae, Seung Ok Lee, Su-Jin Jung, Tae Joong Lim, Ji-Hyun Hwang, Yun-Jo Chung, Eun-Ok Park, and Yunhi Ha
- Subjects
Adult ,Male ,0301 basic medicine ,Alcohol Drinking ,ALDH2 gene ,Aldehyde dehydrogenase ,Alcohol ,Pharmacology ,Article ,law.invention ,Young Adult ,03 medical and health sciences ,Probiotic ,chemistry.chemical_compound ,0302 clinical medicine ,Double-Blind Method ,law ,Lactobacillus ,Humans ,Medicine ,TX341-641 ,Alcohol dehydrogenase ,Bifidobacterium ,ALDH2 ,Cross-Over Studies ,Nutrition and Dietetics ,Ethanol ,biology ,Nutrition. Foods and food supply ,alcohol ,business.industry ,allergology ,Aldehyde Dehydrogenase, Mitochondrial ,Acetaldehyde ,biology.organism_classification ,030104 developmental biology ,probiotics ,chemistry ,biology.protein ,business ,030217 neurology & neurosurgery ,Food Science ,acetaldehyde - Abstract
Excessive alcohol consumption is one of the most significant causes of morbidity and mortality worldwide. Alcohol is oxidized to toxic and carcinogenic acetaldehyde by alcohol dehydrogenase (ADH) and further oxidized to a non-toxic acetate by aldehyde dehydrogenase (ALDH). There are two major ALDH isoforms, cytosolic and mitochondrial, encoded by ALDH1 and ALDH2 genes, respectively. The ALDH2 polymorphism is associated with flushing response to alcohol use. Emerging evidence shows that Lactobacillus and Bifidobacterium species encode alcohol dehydrogenase (ADH) and acetaldehyde dehydrogenase (ALDH) mediate alcohol and acetaldehyde metabolism, respectively. A randomized, double-blind, placebo-controlled crossover clinical trial was designed to study the effects of Lactobacillus and Bifidobacterium probiotic mixture in humans and assessed their effects on alcohol and acetaldehyde metabolism. Here, twenty-seven wild types (ALDH2*1/*1) and the same number of heterozygotes (ALDH2*2/*1) were recruited for the study. The enrolled participants were randomly divided into either the probiotic (Duolac ProAP4) or the placebo group. Each group received a probiotic or placebo capsule for 15 days with subsequent crossover. Primary outcomes were measurement of alcohol and acetaldehyde in the blood after the alcohol intake. Blood levels of alcohol and acetaldehyde were significantly downregulated by probiotic supplementation in subjects with ALDH2*2/*1 genotype, but not in those with ALDH2*1/*1 genotype. However, there were no marked improvements in hangover score parameters between test and placebo groups. No clinically significant changes were observed in safety parameters. These results suggest that Duolac ProAP4 has a potential to downregulate the alcohol and acetaldehyde concentrations, and their effects depend on the presence or absence of polymorphism on the ALDH2 gene.
- Published
- 2021
32. Tu1530: ASSOCIATION BETWEEN BLAUTIA/BACTEROIDES RATIO AND ALTERED BODY MASS INDEX AFTER BARIATRIC SURGERY
- Author
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Jae Hyun Kim, Kyung-won Seo, Ki Hyun Kim, Yoonhong Kim, Bu Kyung Kim, Sanghyun Lim, and Seun Ja Park
- Subjects
Hepatology ,Gastroenterology - Published
- 2022
33. Association between the Blautia/Bacteroides Ratio and Altered Body Mass Index after Bariatric Surgery.
- Author
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Yoonhong Kim, Dooheon Son, Bu Kyung Kim, Ki Hyun Kim, Kyung Won Seo, Kyoungwon Jung, Seun Ja Park, Sanghyun Lim, and Jae Hyun Kim
- Subjects
BARIATRIC surgery ,BODY mass index ,BACTEROIDES ,GUT microbiome ,FECAL microbiota transplantation ,WEIGHT loss ,GASTRIC banding - Abstract
Background: Current evidence support that the gut microbiota plays a potential role in obesity. Bariatric surgery can reduce excess weight and decrease the risk of life-threatening weight-related health problems and may also influence gut microbiota. In this study, we aimed to investigate the changes in gut microbiota before and after bariatric surgery and evaluate the association of the gut microbial shift and altered body mass index (BMI) after bariatric surgery. Methods: Between January 2019 and July 2020, stools from 58 patients scheduled for bariatric surgery were collected. Six months after bariatric surgery, stools from 22 of these patients were re-collected, and the changes in gut microbiota before and after bariatric surgery were evaluated. In addition, the differences in gut microbiota between patients with severe obesity (BMI >35 kg/m2, n=42) and healthy volunteers with normal BMI (18.8 to 22.8 kg/m2, n=41) were investigated. Results: The gut microbiota of patients who underwent bariatric surgery showed increased α-diversity and differed β-diversity compared with those before surgery. Interestingly, Blautia was decreased and Bacteriodes was increased at the genus level after bariatric surgery. Further, the Blautia/Bacteroides ratio showed a positive correlation with BMI. To validate these results, we compared the gut microbiota from severely obese patients with high BMI with those from healthy volunteers and demonstrated that the Blautia/Bacteroides ratio correlated positively with BMI. Conclusion: In the gut microbial analysis of patients who underwent bariatric surgery, we presented that the Blautia/Bacteroides ratio had changed after bariatric surgery and showed a positive correlation with BMI. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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34. Redox-Neutral TEMPO Catalysis: Direct Radical (Hetero)Aryl C-H Di- and Trifluoromethoxylation
- Author
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Peng Liu, Johnny W. Lee, Sanghyun Lim, Ming-Yu Ngai, and Daniel N Maienshein
- Subjects
Reaction mechanism ,Free Radicals ,Hydrocarbons, Fluorinated ,Radical ,010402 general chemistry ,01 natural sciences ,Redox ,behavioral disciplines and activities ,Hydrocarbons, Aromatic ,Catalysis ,Article ,Cyclic N-Oxides ,chemistry.chemical_compound ,Molecule ,Density Functional Theory ,Molecular Structure ,010405 organic chemistry ,Aryl ,Substrate (chemistry) ,General Chemistry ,General Medicine ,Combinatorial chemistry ,humanities ,0104 chemical sciences ,Kinetics ,chemistry ,Catalytic cycle ,Oxidation-Reduction - Abstract
Applications of TEMPO(•) catalysis for the development of redox-neutral transformations are rare. Herein, we report the first TEMPO(•)-catalyzed, redox-neutral C–H di- and trifluoromethoxylation of (hetero)arenes. The reaction exhibits a broad substrate scope, has high functional group tolerance, and can be employed for the late-stage functionalization of complex drug-like molecules. Kinetic measurements, isolation and resubjection of catalytic intermediates, UV-Vis studies, and DFT calculations support the proposed oxidative TEMPO(•)/TEMPO(+) redox catalytic cycle. Mechanistic studies also suggest that Li(2)CO(3) plays an important role in preventing catalyst deactivation. These findings will provide new insight into the design and development of novel reactions through redox-neutral TEMPO(•) catalysis.
- Published
- 2020
35. Dopamine-conjugated Poly(acrylic acid) Blended with an Electrically Conductive Polyaniline Binder for Silicon Anode
- Author
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Sanghyun Lim, Tae-Hyun Kim, and Kukjoo Lee
- Subjects
Materials science ,Electrically conductive ,Silicon anode ,02 engineering and technology ,General Chemistry ,Conjugated system ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Dopamine ,Polyaniline ,medicine ,0210 nano-technology ,medicine.drug ,Acrylic acid - Published
- 2018
36. Enhancing the Performance of a Silicon Anode by Using a New Conjugated Polymer Binder Prepared by Direct Arylation
- Author
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Sanghyun Lim, Hodong Chu, Tae-Hyun Kim, and Kukjoo Lee
- Subjects
chemistry.chemical_classification ,Materials science ,Polymers and Plastics ,Silicon ,General Chemical Engineering ,Organic Chemistry ,Nanochemistry ,chemistry.chemical_element ,02 engineering and technology ,Polymer ,Adhesion ,Conjugated system ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Anode ,chemistry ,Chemical engineering ,Phenylene ,Electrode ,Materials Chemistry ,0210 nano-technology - Abstract
Silicon has been considered as the next-generation anode material for Li-ion batteries due to its high capacity, but suffers from isolated conducting agents due to its large volume expansion and pulverization during cycling, causing rapid decays in performance. Using conjugated polymer binders bearing functional groups that bind Si was suggested to overcome this problem due to their electronic conductivity and enhanced mechanical properties. But conjugated polymers are generally prepared via organometallic intermediates, and are hence very difficult to purify and mass produce. Here, a novel conjugated polymeric binder based on ethylene dioxythiophene (EDOT) and phenylene (EP) was prepared using direct arylation, and then characterized. Specifically, the electrically conductive EP binder showed an enhanced adhesion to Si, and the electrode made of EP showed a capacity of 2250 mAh g-1 at its 1st cycle and 670 mAh g-1 at the 50th cycle, much higher than those of the electrode made of a poly(vinylidene fluoride) (PVdF) binder.
- Published
- 2018
37. Dynamic pattern decoding of source-reconstructed MEG or EEG data: Perspective of multivariate pattern analysis and signal leakage
- Author
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Sanghyun Lim, Kiwoong Kim, Bakul Gohel, Hyukchan Kwon, and Min-Young Kim
- Subjects
Multivariate statistics ,Computer science ,Health Informatics ,Context (language use) ,Electroencephalography ,computer.software_genre ,050105 experimental psychology ,Pattern Recognition, Automated ,03 medical and health sciences ,0302 clinical medicine ,Voxel ,medicine ,Humans ,0501 psychology and cognitive sciences ,Sensitivity (control systems) ,medicine.diagnostic_test ,business.industry ,05 social sciences ,Brain ,Signal Processing, Computer-Assisted ,Pattern recognition ,Independent component analysis ,Computer Science Applications ,Face (geometry) ,Artificial intelligence ,business ,computer ,030217 neurology & neurosurgery ,Decoding methods - Abstract
Recently, an increasing number of studies have employed multivariate pattern analysis (MVPA) rather than univariate analysis for the dynamic pattern decoding of event-related responses recorded with a MEG/EEG sensor. The use of the MVPA approach for source-reconstructed MEG/EEG data is uncommon. For these data, we need to consider the source orientation information and the signal leakage among brain regions. In the present study, we evaluate the perspective of the MVPA approach in the context of source orientation information and signal leakage in source-reconstructed MEG data. We perform face vs. tool object category decoding (FvsT-OCD) of event-related responses from single or multiple voxels from a brain region using a univariate analysis approach and/or the MVPA approach. We also propose and perform symmetric signal leakage correction of source-reconstructed data using an independent component analysis-based approach. FvsT-OCD using single voxel information shows higher sensitivity for the MVPA approach than univariate analysis, as the MVPA approach efficiently utilizes information on all three dipole orientations and is less affected by inter-subject variability. The MVPA approach shows higher sensitivity for FvsT-OCD when considering information from multiple voxels than for a single voxel in a brain region. This finding suggests that the MVPA approach captures the latent multivoxel distributed pattern. However, the results may be partly or entirely attributable to signal leakage between brain regions, as the sensitivity is substantially reduced after signal leakage correction. A consideration of signal leakage is therefore essential during the evaluation of MVPA outcomes.
- Published
- 2018
38. Magnetoencephalographic study of event‐related fields and cortical oscillatory changes during cutaneous warmth processing
- Author
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Kiwoong Kim, Ji-Eun Kim, Kyung-min An, Bakul Gohel, Sanghyun Lim, Hyukchan Kwon, Hyun Joon Lee, and Min-Young Kim
- Subjects
0301 basic medicine ,magnetoencephalography ,Adult ,Male ,alpha ,Stimulation ,Stimulus (physiology) ,Somatosensory system ,Nerve conduction velocity ,Premotor cortex ,03 medical and health sciences ,delta ,Young Adult ,0302 clinical medicine ,Physical Stimulation ,medicine ,laser stimulation ,Humans ,Radiology, Nuclear Medicine and imaging ,Attention ,Evoked Potentials ,Anterior cingulate cortex ,Research Articles ,cortical oscillations ,Skin ,Physics ,Cerebral Cortex ,Brain Mapping ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,Temperature ,Electroencephalography ,Magnetoencephalography ,Index finger ,body regions ,030104 developmental biology ,medicine.anatomical_structure ,Neurology ,event‐related fields ,warmth ,beta ,Female ,Neurology (clinical) ,Anatomy ,Neuroscience ,030217 neurology & neurosurgery ,psychological phenomena and processes ,Research Article - Abstract
Thermoreception is an important cutaneous sense, which plays a role in the maintenance of our body temperature and in the detection of potential noxious heat stimulation. In this study, we investigated event‐related fields (ERFs) and neural oscillatory activities, which were modulated by warmth stimulation. We developed a warmth stimulator that could elicit a warmth sensation, without pain or tactile sensation, by using a deep‐penetrating 980‐nm diode laser. The index finger of each participant (n = 24) was irradiated with the laser warmth stimulus, and the cortical responses were measured using magnetoencephalography (MEG). The ERFs and oscillatory responses had late latencies (∼1.3 s and 1.0–1.5 s for ERFs and oscillatory responses, respectively), which could be explained by a slow conduction velocity of warmth‐specific C‐fibers. Cortical sources of warmth‐related ERFs were seen in the bilateral primary and secondary somatosensory cortices (SI and SII), posterior part of the anterior cingulate cortex (pACC), ipsilateral primary motor, and premotor cortex. Thus, we suggested that SI, SII, and pACC play a role in processing the warmth sensation. Time–frequency analysis demonstrated the suppression of the alpha (8–13 Hz) and beta (18–23 Hz) band power in the bilateral sensorimotor cortex. We proposed that the suppressions in alpha and beta band power are involved in the automatic response to the input of warmth stimulation and sensorimotor interactions. The delta band power (1–4 Hz) increased in the frontal, temporal, and cingulate cortices. The power changes in delta band might be related with the attentional processes during the warmth stimulation.
- Published
- 2018
39. Transition-metal-free C–H amidation and chlorination: synthesis of N/N′-mono-substituted imidazopyridin-2-ones from N-pyridyl-N-hydroxylamine intermediates
- Author
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Sanghyun Lim, Dominique N. Spiegowski, Fuhua Zhao, Ming-Yu Ngai, Katarzyna N. Lee, and Johnny W. Lee
- Subjects
010405 organic chemistry ,Metals and Alloys ,Biological activity ,General Chemistry ,010402 general chemistry ,01 natural sciences ,Medicinal chemistry ,Article ,Catalysis ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,chemistry.chemical_compound ,Hydroxylamine ,chemistry ,Transition metal ,Functional group ,Materials Chemistry ,Ceramics and Composites ,Urea ,Molecule - Abstract
Non-symmetric 1,3-substituted imidazopyridin-2-ones are a common structural scaffold found among many biologically active molecules. Herein we report an efficient, mild, and transition-metal free C–H amidation strategy to access such a pyrido-fused cyclic urea framework in good yields and with a broad functional group tolerance.
- Published
- 2018
40. Physically cross-linked polymer binder based on poly(acrylic acid) and ion-conducting poly(ethylene glycol-co-benzimidazole) for silicon anodes
- Author
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Kukjoo Lee, Sanghyun Lim, Inseop Shin, Taeeun Yim, Artur Tron, Junyoung Mun, and Tae-Hyun Kim
- Subjects
chemistry.chemical_classification ,Ethylene ,Materials science ,Silicon ,Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,Polymer ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Ion ,Anode ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,PEG ratio ,Electrode ,Polymer chemistry ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,0210 nano-technology ,Acrylic acid - Abstract
The practical applications of Si electrodes in lithium-ion batteries are limited since they undergo large changes in volume during charge and discharge, and consequently become highly deteriorated. A novel binder system holding silicon particles together and preventing disintegration of the electrode during operation hence needs to be developed to enable reliable cycleability. In the current work, such a new polymer binder system, based on poly(acrylic acid) (PAA) and poly(ethylene glycol-co-benzimidazole) (PEGPBI), is developed for silicon anodes. The physical crosslinking using acid-base interactions between PAA and PBI, together with the ion-conducting PEG group, yields physical properties for the resulting PAA-PEGPBI-based anodes that are better than those of electrodes based on the currently available PAA binder, and yields good cell performances. A Si-based electrode with high loading levels of 1.0–1.3 mg cm−2 (0.7–0.91 Si mg cm−2) is reliably manufactured using specifically PAA-PEGPBI-2, which is made with 2 wt% of PEGPBI relative to PAA, and shows a very high capacity value of 1221 mAh g−1 at a rate of 0.5 C after 50 cycles, and a high capacity value of more than 1600 mAh g−1 at a high rate of 2 C.
- Published
- 2017
41. A Study on the Development of Optimal Renewal Planning Model in Water Supply Facilities Connected to Future Financial Plan of Water Providers
- Author
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Sanghyun Lim, Jeewon Seo, Jayong Koo, Hwisu Shin, and Ki-Bum Kim
- Subjects
Finance ,business.industry ,Financial plan ,Water supply ,business ,Sales and operations planning - Published
- 2017
42. Detecting Membrane Protein-protein Interactions Using the Mammalian Membrane Two-hybrid (MaMTH) Assay
- Author
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Sanghyun Lim, Zhong Yao, Igor Stagljar, Ingrid Grozavu, Punit Saraon, and Jamie Snider
- Subjects
0301 basic medicine ,Vesicle-associated membrane protein 8 ,Chemistry ,Peripheral membrane protein ,Biological membrane ,General Medicine ,Interactome ,Green fluorescent protein ,Cell biology ,Protein–protein interaction ,03 medical and health sciences ,030104 developmental biology ,Membrane protein ,Integral membrane protein - Abstract
Protein-protein interactions (PPIs) play an integral role in numerous cellular processes. Membrane protein interactions, in particular, are critical in cellular responses to stresses and stimuli, with dysfunction of these PPIs (e.g., due to aberrant expression and/or mutation of interaction partners) leading to a diverse array of pathological states. Exploration of the interaction space and dynamics of membrane proteins is difficult due to the limitations of current techniques used to study proteins in the biochemically complex environment of biological membranes. In the protocols below, we describe a newly developed membrane protein interaction assay called the Mammalian-Membrane Two-Hybrid (MaMTH), designed specifically for the detection of integral membrane PPIs in the context of living mammalian cells. Prior to using MaMTH, cell lines of interest are genetically modified to encode a reporter of choice. MaMTH "bait" and "prey" constructs of interest are also generated using Gateway cloning technology. The assay is then performed by co-transfection of baits and preys, with bait-prey interaction quantifiably assessed by way of a reporter signal (e.g., light (luciferase), fluorescence (GFP). © 2017 by John Wiley & Sons, Inc.
- Published
- 2017
43. Effect of probiotic administration on gut microbiota and depressive behaviors in mice
- Author
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Byung-Soo Koo, Sanghyun Lim, Quan Feng Liu, Hong-Man Kim, Chi-Yeon Lim, Myung-Jun Chung, and Seok-Seong Kang
- Subjects
0301 basic medicine ,Male ,Restraint, Physical ,medicine.medical_treatment ,Central nervous system ,Physiology ,Gut flora ,law.invention ,Fluoxetine Hydrochloride ,03 medical and health sciences ,chemistry.chemical_compound ,Probiotic ,0302 clinical medicine ,Corticosterone ,law ,medicine ,Animals ,Saline ,Feces ,Fluoxetine ,Mice, Inbred ICR ,biology ,Behavior, Animal ,business.industry ,Depression ,Probiotics ,Building and Construction ,biology.organism_classification ,Gastrointestinal Microbiome ,030104 developmental biology ,medicine.anatomical_structure ,chemistry ,business ,030217 neurology & neurosurgery ,Locomotion ,Stress, Psychological ,medicine.drug ,Research Article - Abstract
BACKGROUND: The gut microbiota is closely associated with the bidirectional gut-brain axis that modulates neuropsychological functions of the central nervous system, thereby affecting mental disorders such as depression. Although it is known that probiotics affect brain functions, the impact of probiotics on the regulation of the prevalence and composition of gut microbiota, leading to anti-depressive effects has not been well understood. METHODS: Mice were randomly divided into four different groups (n = 10 for each group) as follows: Group G1 (normal group) as control and group G2 (stress group) were given sterile saline via oral route daily for 8 weeks without and with stress condition, respectively. Under the stress condition, group G3 (fluoxetine group) was administered with fluoxetine hydrochloride and group G4 (probiotic group) was orally given multi-strains of probiotics daily for 8 weeks. After treatment, all mice underwent behavioral testing. Furthermore, fecal samples were collected from randomly selected 5 mice of each group on day 60 and taxonomical analysis of intestinal microbial distribution was performed. RESULTS: Mice subjected to restraint stress showed depressive-like behaviors along with high corticosterone levels in serum. However, probiotic administration alleviated depressive-like behaviors and decreased corticosterone level. Moreover, fecal microbiota was distinctly altered in probiotic-treated mice of the stress group. The relative abundance of phylum and genus levels was significantly decreased in the stress group, but probiotic administration restored the composition of microbes restored. CONCLUSION: Ingested probiotics alter the composition of gut microbiota, likely improving the symptoms of depression. [Figure: see text] ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s40199-020-00329-w) contains supplementary material, which is available to authorized users.
- Published
- 2019
44. Location Based One-Time Conference Protocol Without Personal Information
- Author
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SangHyun Lim and Jiyoung Lim
- Subjects
Service (business) ,business.industry ,Computer science ,05 social sciences ,Internet privacy ,Digital data ,050301 education ,02 engineering and technology ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,business ,0503 education ,Personally identifiable information ,Protocol (object-oriented programming) - Abstract
Nowadays, we produce massive digital data using smartphones and need to share them with others. However, we feel tired of sharing our personal information repeatedly since we live in the society where the excessive personal information is disclosed. We propose a protocol for the location-based one-time communication service using a beacon. In the service, people at the same place could meet at online to share some digital data without revealing their personal information. After meeting, any personal information does not be traceless to each other. People can communicate without disclosure of personal information.
- Published
- 2019
45. Erratum to: Effects of multi-species probiotic supplementation on alcohol metabolism in rats
- Author
-
Myung Jun Chung, Jong Hyun Yoon, Sanghyun Lim, and Tae-Joong Lim
- Subjects
business.industry ,Published Erratum ,MEDLINE ,General Medicine ,Bioinformatics ,Applied Microbiology and Biotechnology ,Microbiology ,law.invention ,Probiotic ,law ,Multi species ,Medicine ,Ethanol metabolism ,business - Abstract
In the article by Lim et al. published in Journal of Microbiology 2021; 59, 417–425, did not include acknowledgments or conflict of interest.
- Published
- 2021
46. Development of novel simple sequence repeat markers from ramie (Boehmeria nivea L. Gaudich) and analysis of genetic diversity in its genetic resources
- Author
-
Yurry Um, Young Seok Jang, Yong Su Jung, Sanghyun Lim, Young-Mi Kim, Jae Joon Kim, Yoon Kyung Uhm, Sanghyun Lee, Kyung Hee Roh, and Ho Bang Kim
- Subjects
0106 biological sciences ,0301 basic medicine ,Genetic diversity ,biology ,business.industry ,food and beverages ,Plant Science ,Horticulture ,biology.organism_classification ,01 natural sciences ,Boehmeria ,Genetic analysis ,Ramie ,Biotechnology ,Urticaceae ,03 medical and health sciences ,030104 developmental biology ,Genetic marker ,Genetic variation ,Genetic structure ,business ,010606 plant biology & botany - Abstract
Boehmeria nivea (ramie), a subshrub of the Urticaceae family and an important fiber crop, has been grown in Asian countries, including Korea, for many centuries. Traditionally, in some regions of Korea, ramie leaves are also used as a major ingredient in ‘Songpyeon’ rice cakes. Despite its economic importance, the molecular genetics of ramie have not yet been studied in detail. Researchers from Yeong-Gwang Agricultural Technology Center collected genetic resources of ramie from a variety of local sites in Korea. Nuclear internal transcribed spacer sequences amplified from 90 genetic resources showed no variation in size or sequence between them or B. nivea reference samples, indicating that all the genetic resources could be taxonomically classified as B. nivea. To systematically and efficiently manage these genetic resources, we developed simple sequence repeat (SSR) markers for ramie using the magnetic bead hybridization selection method. Finally, we selected 17 SSR markers that showed possible polymorphism among the genetic resources and analyzed the genetic diversity of ramie collection. These 17 markers detected a total of 140 alleles, ranging from 3 to 17 alleles per accession. The average genetic diversity value was 0.61, ranging from 0.37 to 0.84. Average polymorphism information content was 0.56, ranging from 0.34 to 0.82. Genetic cluster analysis based on SSR data revealed that the genetic collection of ramie plants could be classified into four distinct clusters. A purity test on several of the genetic resources using polymorphic SSR markers revealed that some resources were impure. These newly developed SSR markers might be useful for diverse genetic analysis including the management of genetic collections, establishment of core collections, and cultivar identification.
- Published
- 2016
47. Polymeric binder based on PAA and conductive PANI for high performance silicon-based anodes
- Author
-
Taeeun Yim, Sanghyun Lim, Junyoung Mun, Artur Tron, Young-Jun Kim, Kukjoo Lee, and Tae-Hyun Kim
- Subjects
Materials science ,General Chemical Engineering ,02 engineering and technology ,General Chemistry ,biochemical phenomena, metabolism, and nutrition ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Silicon based ,Anode ,Chemical engineering ,Electrical resistivity and conductivity ,0210 nano-technology ,Electrical conductor - Abstract
A novel polymeric binder, PAA–PANI, was prepared which effectively controls the uniformity of a Si anode. PANI provided electrical conductivity for this system, and furthermore participated in an acid–base interaction with PAA and as a result displayed remarkable mechanical properties. These electrical and mechanical properties together apparently led to PAA–PANI having yielded stable cycling and high utilization of the active Si material even after 300 cycles.
- Published
- 2016
48. Current status and prospects of citrus genomics
- Author
-
Kwan Jeong Song, Su-Hyun Yun, Ho Bang Kim, Jae Joon Kim, Sanghyun Lim, and Young Cheol Park
- Subjects
Comparative genomics ,Molecular breeding ,business.industry ,food and beverages ,Genomics ,Plant Science ,Nucellar embryony ,Biology ,Genome ,Biotechnology ,Indel ,business ,Agronomy and Crop Science ,Functional genomics ,Reference genome - Abstract
Citrus is an economically important fruit tree with the largest amount of fruit production in the world. It provides important nutrition such as vitamin C and other health-promoting compounds including its unique flavonoids for human health. However, it is classified into the most difficult crops to develop new cultivars through conventional breeding approaches due to its long juvenility and some unique reproductive biological features such as gamete sterility, nucellar embryony, and high level of heterozygosity. Due to global warming and changes in consumer trends, establishing a systematic and efficient breeding programs is highly required for sustainable production of high quality fruits and diversification of cultivars. Recently, reference genome sequences of sweet orange and clementine mandarin have been released. Based on the reference whole-genome sequences, comparative genomics, reference-guided resequencing, and genotyping-by-sequencing for various citrus cultivars and crosses could be performed for the advance of functional genomics and development of traits-related molecular markers. In addition, a full understanding of gene function and gene co-expression networks can be provided through combined analysis of various transcriptome data. Analytic information on whole-genome and transcriptome will provide massive data on polymorphic molecular markers such as SNP, INDEL, and SSR, suggesting that it is possible to construct integrated maps and high-density genetic maps as well as physical maps. In the near future, integrated maps will be useful for map-based precise cloning of genes that are specific to citrus with major agronomic traits to facilitate rapid and efficient marker-assisted selection.
- Published
- 2015
49. Frontoparietal EEG alpha-phase synchrony reflects differential attentional demands during word recall and oculomotor dual-tasks
- Author
-
Sanghyun Lim, Minah Suh, Yong-Ho Lee, Eun-Ju Lee, Hyukchan Kwon, Min-Young Kim, Gusang Kwon, and Kiwoong Kim
- Subjects
Adult ,Male ,Eye Movements ,Computer science ,Electroencephalography Phase Synchronization ,Electroencephalography ,Young Adult ,Parietal Lobe ,Neural Pathways ,Synchronization (computer science) ,medicine ,Humans ,Attention ,Artificial neural network ,medicine.diagnostic_test ,Working memory ,General Neuroscience ,Eye movement ,Cognition ,Frontal Lobe ,Alpha Rhythm ,Memory, Short-Term ,Reading ,Mental Recall ,Female ,Cognitive load ,Cognitive psychology - Abstract
To study the relationship between the varying degrees of cognitive load and long-range synchronization among neural networks, we utilized a dual-task paradigm combining concurrent word recall working memory tasks and oculomotor tasks that differentially activate the common frontoparietal (FP) network. We hypothesized that each dual-task combination would generate differential neuronal activation patterns among long-range connection during word retention period. Given that the FP alpha-phase synchronization is involved in attentional top-down processes, one would expect that the long-range synchronization pattern is affected by the degrees of dual-task demand. We measured a single-trial phase locking value in the alpha frequency (8-12 Hz) with electroencephalography in healthy participants. Single-trial phase locking value characterized the synchronization between two brain signals. Our results revealed that different amounts of FP alpha-phase synchronization were produced by different dual-task combinations, particularly during the early phase of the word retention period. These differences were dependent on the individual's working memory capacity and memory load. Our study shows that during dual-task, each oculomotor task, which is subserved by distinct neural network, generates different modulation patterns on long-range neuronal activation and FP alpha-phase synchronization seems to reflect these differential cognitive loads.
- Published
- 2015
50. Dopamine-grafted heparin as an additive to the commercialized carboxymethyl cellulose/styrene-butadiene rubber binder for practical use of SiOx/graphite composite anode
- Author
-
Kukjoo Lee, Tae-Hyun Kim, Sanghyun Lim, Junyoung Mun, Jaemin Kim, and Nakgyu Go
- Subjects
Materials science ,Styrene-butadiene ,Composite number ,lcsh:Medicine ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,chemistry.chemical_compound ,Natural rubber ,medicine ,Graphite ,lcsh:Science ,chemistry.chemical_classification ,Multidisciplinary ,lcsh:R ,Polymer ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Anode ,Carboxymethyl cellulose ,chemistry ,Chemical engineering ,visual_art ,Electrode ,visual_art.visual_art_medium ,lcsh:Q ,0210 nano-technology ,medicine.drug - Abstract
Graphite is used commercially as the active material in lithium ion batteries, frequently as part of a graphite/SiOx composite. Graphite is used in conjunction with SiOx to overcome the limited energy density of graphite, and to lessen the adverse effects of volume expansion of Si. However, electrodes based on graphite/SiOx composites can be made with only 3–5 wt % SiOx because of the increased failure of electrodes with higher SiOx contents. Here, we developed a new polymer binder, by combining dopamine-grafted heparin with the commercial binder carboxymethyl cellulose (CMC)/styrene butadiene rubber (SBR), in order to more effectively hold the SiOx particles together and prevent disintegration of the electrode during charging and discharging. The crosslinking using acid-base interactions between heparin and CMC and the ion-conducting sulfonate group in heparin, together with the strong adhesion properties of dopamine, yielded better physical properties for the dopamine-heparin-containing CMC/SBR-based electrodes than for the commercial CMC/SBR-based electrodes, and hence yielded excellent cell performance with a retention of 73.5% of the original capacity, a Coulombic efficiency of 99.7% at 150 cycles, and a high capacity of 200 mAh g−1 even at 20 C. Furthermore, a full cell test using the proposed electrode material showed stable cell performance with 89% retention at the 150th cycle.
- Published
- 2018
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