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Jeon Y, Li L, Bhatia M, Ryu H, Santo Domingo JW, Brown J, Goetz J, Seo Y. Impact of harmful algal bloom severity on bacterial communities in a full-scale biological filtration system for drinking water treatment. Sci Total Environ 2024; 927:171301. [PMID: 38423320 DOI: 10.1016/j.scitotenv.2024.171301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 12/15/2023] [Accepted: 02/25/2024] [Indexed: 03/02/2024]
Abstract
The occurrence of harmful algal blooms (HABs) in freshwater environments has been expanded worldwide with growing frequency and severity. HABs can pose a threat to public water supplies, raising concerns about safety of treated water. Many studies have provided valuable information about the impacts of HABs and management strategies on the early-stage treatment processes (e.g., pre-oxidation and coagulation/flocculation) in conventional drinking water treatment plants (DWTPs). However, the potential effect of HAB-impacted water in the granular media filtration has not been well studied. Biologically-active filters (BAFs), which are used in drinking water treatment and rely largely on bacterial community interactions, have not been examined during HABs in full-scale DWTPs. In this study, we assessed the bacterial community structure of BAFs, functional profiles, assembly processes, and bio-interactions in the community during both severe and mild HABs. Our findings indicate that bacterial diversity in BAFs significantly decreases during severe HABs due to the predominance of bloom-associated bacteria (e.g., Spingopyxis, Porphyrobacter, and Sphingomonas). The excitation-emission matrix combined with parallel factor analysis (EEM-PARAFAC) confirmed that filter influent affected by the severe HAB contained a higher portion of protein-like substances than filter influent samples during a mild bloom. In addition, BAF community functions showed increases in metabolisms associated with intracellular algal organic matter (AOM), such as lipids and amino acids, during severe HABs. Further ecological process and network analyses revealed that severe HAB, accompanied by the abundance of bloom-associated taxa and increased nutrient availability, led to not only strong stochastic processes in the assembly process, but also a bacterial community with lower complexity in BAFs. Overall, this study provides deeper insights into BAF bacterial community structure, function, and assembly in response to HABs.
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Affiliation(s)
- Youchul Jeon
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH 43606, United States of America
| | - Lei Li
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH 43606, United States of America
| | - Mudit Bhatia
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH 43606, United States of America
| | - Hodon Ryu
- Water Infrastructure Division, Center for Environmental Solutions and Emergency Response, U.S. Environmental Protection Agency, Cincinnati, OH 45268, United States of America
| | - Jorge W Santo Domingo
- Water Infrastructure Division, Center for Environmental Solutions and Emergency Response, U.S. Environmental Protection Agency, Cincinnati, OH 45268, United States of America
| | - Jess Brown
- Carollo Engineers' Research and Development Practice, Costa Mesa, CA 92626, United States of America
| | - Jake Goetz
- City of Toledo Colins Park Water Treatment, Toledo, OH 43605, United States of America
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH 43606, United States of America; Department of Chemical and Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH 43606, United States of America.
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Tsai KP, Kirschman ZA, Moldaenke C, Chaffin JD, McClure A, Seo Y, Bridgeman TB. Field and laboratory studies of fluorescence-based technologies for real-time tracking of cyanobacterial cell lysis and potential microcystins release. Sci Total Environ 2024; 920:171121. [PMID: 38382604 DOI: 10.1016/j.scitotenv.2024.171121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 01/29/2024] [Accepted: 02/18/2024] [Indexed: 02/23/2024]
Abstract
Elevated levels of dissolved microcystins (MCs) in source water due to rapid cell lysis of harmful cyanobacterial blooms may pose serious challenges for drinking water treatment. Catastrophic cell lysis can result from outbreaks of naturally-occurring cyanophages - as documented in Lake Erie during the Toledo water crisis of 2014 and in 2019, or through the application of algaecides or water treatment chemicals. Real-time detection of cyanobacterial cell lysis in source water would provide a valuable tool for drinking water plant and reservoir managers. In this study we explored two real-time fluorescence-based devices, PhycoSens and PhycoLA, that can detect unbound phycocyanin (uPC) as a potential indication of cell lysis and MCs release. The PhycoSens was deployed at the Low Service pump station of the City of Toledo Lake Erie drinking water treatment plant from July 15 to October 19, 2022 during the annual cyanobacteria bloom season. It measured major algal groups and uPC in incoming lake water at 15-min intervals during cyanobacteria dominant and senescence periods. Intermittent uPC detections from the PhycoSens over a three-month period coincided with periods of increasing proportions of extracellular MCs relative to total (intracellular and extracellular) MCs, indicating potential for uPC use as an indicator of cyanobacterial cell integrity. Following exposures of laboratory-cultured MCs-producing Microcystis aeruginosa NIES-298 (120 μg chlorophyll/L) to cyanophage Ma-LMM01, copper sulfate (0.5 and 1 mg Cu/L), sodium carbonate peroxyhydrate (PAK® 27, 6.7 and 10 mg H2O2/L), and potassium permanganate (2.5 and 4 mg/L), appearance of uPC coincided with elevated fractions of extracellular MCs. The PhycoLA was used to monitor batch samples collected daily from Lake Erie water exposed to algaecides in the laboratory. Concurrence of uPC signal and surge of dissolved MCs was observed following 24-h exposures to copper sulfate and PAK 27. Overall results indicate the appearance of uPC is a useful indicator of the onset of cyanobacterial cell lysis and the release of MCs when MCs are present.
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Affiliation(s)
- Kuo-Pei Tsai
- Lake Erie Center, University of Toledo, OH, USA.
| | - Zachary A Kirschman
- Department of Civil and Environmental Engineering, University of Toledo, OH, USA
| | | | - Justin D Chaffin
- F.T. Stone Laboratory and Ohio Sea Grant, The Ohio State University, OH, USA
| | - Andrew McClure
- Division of Water Treatment for the City of Toledo, OH, USA
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, OH, USA; Department of Chemical Engineering, University of Toledo, OH, USA
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Chaffin JD, Barker KB, Bickman SR, Bratton JF, Bridgeman TB, Bhatia M, Buchholz SD, Bullerjahn GS, Johengen TH, Kang DW, Lewis GG, Lochhead MJ, Macdonald BM, Petrou CL, Platz M, Purcell H, Roser J, Seo Y, Siddiquee M, Snyder B, Taylor AT, Verhamme EM, Westrick JA. An assessment of a biosensor system for the quantification of microcystins in freshwater cyanobacterial blooms. Anal Biochem 2024; 687:115429. [PMID: 38113981 DOI: 10.1016/j.ab.2023.115429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/29/2023] [Accepted: 12/11/2023] [Indexed: 12/21/2023]
Abstract
Microcystin-producing cyanobacterial blooms are a global issue threatening drinking water supplies and recreation on lakes and beaches. Direct measurement of microcystins is the only way to ensure waters have concentrations below guideline concentrations; however, analyzing water for microcystins takes several hours to days to obtain data. We tested LightDeck Diagnostics' bead beater cell lysis and two versions of the quantification system designed to give microcystin concentrations within 20 min and compared it to the standard freeze-thaw cycle lysis method and ELISA quantification. The bead beater lyser was only 30 % effective at extracting microcystins compared to freeze-thaw. When considering freeze-thaw samples analyzed in 2021, there was good agreement between ELISA and LightDeck version 2 (n = 152; R2 = 0.868), but the LightDeck slightly underestimated microcystins (slope of 0.862). However, we found poor relationships between LightDeck version 2 and ELISA in 2022 (n = 49, slopes 0.60 to 1.6; R2 < 0.6) and LightDeck version 1 (slope = 1.77 but also a high number of less than quantifiable concentrations). After the quantification issues are resolved, combining the LightDeck system with an already-proven rapid lysis method (such as microwaving) will allow beach managers and water treatment operators to make quicker, well-informed decisions.
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Affiliation(s)
- Justin D Chaffin
- F.T. Stone Laboratory and Ohio Sea Grant, The Ohio State University, Put in Bay, Ohio 43456, USA; Bowling Green State University, Bowling Green, Ohio 43403, USA.
| | | | - Sarah R Bickman
- LightDeck Diagnostics, Inc., 5603 Arapahoe Ave, Boulder, Colorado 80303, USA
| | - John F Bratton
- LimnoTech, Inc. 501 Avis Dr., Ann Arbor Michigan 48108, USA
| | | | - Mudit Bhatia
- Department of Civil and Environmental Engineering, University of Toledo, 3006 Nitschke Hall, Toledo, Ohio 43606, USA
| | - Seth D Buchholz
- Bowling Green State University, Bowling Green, Ohio 43403, USA
| | | | - Thomas H Johengen
- Cooperative Institute for Great Lakes Research, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Dae-Wook Kang
- Department of Civil and Environmental Engineering, University of Toledo, 3006 Nitschke Hall, Toledo, Ohio 43606, USA
| | - Gregory G Lewis
- LightDeck Diagnostics, Inc., 5603 Arapahoe Ave, Boulder, Colorado 80303, USA
| | - Michael J Lochhead
- LightDeck Diagnostics, Inc., 5603 Arapahoe Ave, Boulder, Colorado 80303, USA
| | - Brooks M Macdonald
- LightDeck Diagnostics, Inc., 5603 Arapahoe Ave, Boulder, Colorado 80303, USA
| | - Cassandra L Petrou
- LightDeck Diagnostics, Inc., 5603 Arapahoe Ave, Boulder, Colorado 80303, USA
| | - Michelle Platz
- LimnoTech, Inc. 501 Avis Dr., Ann Arbor Michigan 48108, USA
| | - Heidi Purcell
- Cooperative Institute for Great Lakes Research, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Jack Roser
- LightDeck Diagnostics, Inc., 5603 Arapahoe Ave, Boulder, Colorado 80303, USA
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, 3006 Nitschke Hall, Toledo, Ohio 43606, USA; Department of Chemical Engineering, University of Toledo, 3048 Nitschke Hall, Toledo, Ohio 43606, USA
| | - Mashuk Siddiquee
- Department of Civil and Environmental Engineering, University of Toledo, 3006 Nitschke Hall, Toledo, Ohio 43606, USA
| | - Brenda Snyder
- Lake Erie Center, The University of Toledo, Oregon, Ohio 43616, USA
| | - Autumn T Taylor
- F.T. Stone Laboratory and Ohio Sea Grant, The Ohio State University, Put in Bay, Ohio 43456, USA
| | | | - Judy A Westrick
- Lumigen Instrument Center, Wayne State University, 5101Cass Ave., Detroit, Michigan 48202, USA
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Caravaca J, Bobba KN, Du S, Peter R, Gullberg GT, Bidkar AP, Flavell RR, Seo Y. A technique to quantify very low activities in regions of interest with a collimatorless detector. IEEE Trans Med Imaging 2024; PP:1-1. [PMID: 38478457 DOI: 10.1109/tmi.2024.3377142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
We present a new method to measure sub-microcurie activities of photon-emitting radionuclides in organs and lesions of small animals in vivo. Our technique, named the collimator-less likelihood fit, combines a very high sensitivity collimatorless detector with a Monte Carlo-based likelihood fit in order to estimate the activities in previously segmented regions of interest along with their uncertainties. This is done directly from the photon projections in our collimatorless detector and from the region of interest segmentation provided by an x-ray computed tomography scan. We have extensively validated our approach with 225Ac experimentally in spherical phantoms and mouse phantoms, and also numerically with simulations of a realistic mouse anatomy. Our method yields statistically unbiased results with uncertainties smaller than 20% for activities as low as ~111 Bq (3 nCi) and for exposures under 30 minutes. We demonstrate that our method yields more robust recovery coefficients when compared to SPECT imaging with a commercial pre-clinical scanner, specially at very low activities. Thus, our technique is complementary to traditional SPECT/CT imaging since it provides a more accurate and precise organ and tumor dosimetry, with a more limited spatial information. Finally, our technique is specially significant in extremely low-activity scenarios when SPECT/CT imaging is simply not viable.
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Lall R, Evans M, Seo Y, Niknejad A, Anwar M. Dosimetry Reconstruction in Radiopharmaceutical Therapy Using a Sparse Network of External γ-Sensors. Int J Radiat Oncol Biol Phys 2023; 117:S30-S31. [PMID: 37784473 DOI: 10.1016/j.ijrobp.2023.06.293] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Radiopharmaceutical therapy (RPT) has demonstrated promise in the treatment of neuroendocrine and prostate cancer. Due to the highly varied biodistribution and non-homogeneity of total integrated dose across cancer patients, a system for real-time dosimetry based on continuous measurement is desirable to deliver sufficient dose for tumor ablation while preventing toxicity from off-target uptake by organs at risk (OAR). Single time point imaging (mostly SPECT)-based dosimetry offers a snapshot of the body-wide dose distribution at a given time point, but even single SPECT imaging is generally limited in availability, often leading to significant inaccuracies in estimating total integrated dose. Therefore, accurate personalized dosimetry in RPT is an unmet need and requires continuous dosimetry measurements of tumors and OARs across multiple half-lives of the therapeutic radiopharmaceutical. Using a priori knowledge of tumor and OAR locations from pretherapy imaging, we have developed a novel algorithm that utilizes a network of custom uncollimated, optical fiber-based γ-counting probes to isolate the real-time in vivo tumor and OAR uptake in 177Lu-PSMA-617 and 225Ac-MACROPA-YS5 therapy. MATERIALS/METHODS The proposed system was successfully validated in athymic mice models bearing varying numbers of tumors from two human prostate cancer cell lines (PC3-pip, PC3-flu). Uncollimated γ counts using the developed probes were acquired outside of the mice for 10 minutes, starting at 0 hr, 6 hrs, 12 hrs, 24 hrs, and 48 hrs after the injection of 177Lu-PSMA-617. The percent injected activity per mL of tissue (%IA/mL) of each tumor and OAR was reconstructed at every time point and compared to the %IA/mL extracted from SPECT/CT immediately after the recording. RESULTS The developed system's %IA/mL reconstruction in PC3-pip tumors, PC3-flu tumors, kidneys, and bladders is highly correlative with the %IA/mL extracted from state-of-art in vivo dosimetry techniques, with %IA/mL ranging from 0.1% to 160% assuming a 29.6 MBq 177Lu-PSMA-617 administration. The least squares linear regression fit between the reconstructed activity and the activity measured from SPECT/CT is given by Estimated %IA/mL = 0.91 x SPECT %IA/mL, with an R2 of 0.991, and Pearson's r of 0.9975. There is a nearly 1:1 mapping between the proposed model and SPECT/CT. CONCLUSION A novel dose reconstruction algorithm for personalized dosimetry in RPT that utilizes a sparse set of external γ-counters and a priori knowledge of tumor and OAR locations was developed and validated in in vivo human prostate cancer murine models. The proposed system enables continuous dosimetry measurements of multiple tumors and OAR noninvasively, with high accessibility, high temporal resolution, and across multiple classes of ɑ and β-based RPT. Similar experiments using 225Ac-MACROPA-YS5 are ongoing and additional results will be reported.
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Affiliation(s)
- R Lall
- University of California, Berkeley, Berkeley, CA
| | - M Evans
- University of California, San Francisco, San Francisco, CA
| | - Y Seo
- University of California, San Francisco, San Francisco, CA
| | - A Niknejad
- University of California, Berkeley, Berkeley, CA
| | - M Anwar
- University of California, San Francisco, San Francisco, CA
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Jeon Y, Baranwal P, Li L, Piezer K, Seo Y. Review: Current understanding on biological filtration for the removal of microcystins. Chemosphere 2023; 313:137160. [PMID: 36356807 DOI: 10.1016/j.chemosphere.2022.137160] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 10/10/2022] [Accepted: 10/30/2022] [Indexed: 06/16/2023]
Abstract
Harmful algal blooms (HABs) have become a global problem not only in aquatic habitats but also in public health and safety due to the production of cyanotoxins as their secondary metabolites. Among the various identified cyanotoxin groups, microcystins (MCs) are one of the most prevalent cyanotoxin detected during HABs. Different strategies including advanced physical and chemical treatment processes have been developed to mitigate the threat of cyanotoxins in water utilities, but these have revealed certain limitations in terms of high operational costs, low removal efficacy, and harmful by-products formation. Recently, biological filtration systems (BFS) have gained attention for safe drinking water production as they can treat various natural organic matter (NOM) and emerging contaminants through a highly efficient and environmentally sustainable process. However, limited attention has been given to understand the current research progress, research challenges, and knowledge gaps for the successful implementation of BFS for MC removal. Therefore, in this review, currently identified MC biodegradation pathways and MC-degrading microorganisms with their degradation rates are summarized, which may be pivotal for studying bioaugmented BFS to enhance the MC removal during HABs. Moreover, both laboratory and field studies on BFS for MC removal are reviewed, followed by a discussion of current challenges and future research needs for the practical application of BFS.
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Affiliation(s)
- Youchul Jeon
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH, 43606, United States
| | - Parul Baranwal
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH, 43606, United States
| | - Lei Li
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH, 43606, United States
| | - Kayla Piezer
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH, 43606, United States; Department of Chemical Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, 43606, United States
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH, 43606, United States; Department of Chemical Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, 43606, United States.
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Baranwal P, Kang DW, Seo Y. Impacts of algal organic matter and humic substances on microcystin-LR removal and their biotransformation during the biodegradation process. Sci Total Environ 2022; 852:157993. [PMID: 35964751 DOI: 10.1016/j.scitotenv.2022.157993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 08/08/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
The application of bioaugmentation (i.e., injection of contaminant-degrading microorganisms) has shown its potential to remove harmful cyanotoxins like microcystin-LR (MC-LR) from drinking water sources. However, the natural organic matter (NOM) present in both natural and engineered water systems might affect the bacterial biodegradation of MC-LR. Therefore, for the successful application of bioaugmentation for MC-LR removal in water treatment, it is important to understand NOM effects on MC-LR biodegradation. In this study, the impact of NOM [algal organic matter (AOM) and humic substances (HS)] on MC-LR biodegradation was evaluated in the presence of varying concentrations of NOM by monitoring MC-LR biodegradation kinetics. The changes in NOM composition during MC-LR biodegradation were also characterized by a five-component Parallel factor (PARAFAC) model using 336 excitation-emission matrix (EEM) spectra collected at different sampling points. Our results showed decreases in MC-LR biodegradation rate of 1.6-and 3.4-fold in the presence of AOM and HS, respectively. The expression of the functional mlrA gene exhibited a similar trend to the MC-LR degradation rate at different NOM concentrations. EEM-PARAFAC analyses and NOM molecular size fractionation results indicated a relatively greater production of terrestrial humic-like components (57%) and a decrease of protein-like components. Two-dimensional correlation spectroscopy (2D-COS) analyses further confirmed that low molecular weight protein-like components were initially utilized by bacteria, followed by the formation of higher molecular weight humic-like components, likely due to microbial metabolism.
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Affiliation(s)
- Parul Baranwal
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH 43606, United States
| | - Dae-Wook Kang
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH 43606, United States
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH 43606, United States; Department of Chemical Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH 43606, United States.
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Alam SS, Mather CB, Seo Y, Lapitsky Y. Poly(allylamine)/tripolyphosphate coacervates for encapsulation and long-term release of cetylpyridinium chloride. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Choi Y, Park E, Kim S, Ha J, Oh H, Kim Y, Lee Y, Seo Y, Kang J, Lee S, Lee H, Yoon Y, Choi KH. Fermented milk with Lactobacillus curvatus SMFM2016-NK alleviates periodontal and gut inflammation, and alters oral and gut microbiota. J Dairy Sci 2021; 104:5197-5207. [PMID: 33685682 DOI: 10.3168/jds.2020-19625] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 01/09/2021] [Indexed: 11/19/2022]
Abstract
This study aimed to analyze the effect of milk fermented with Lactobacillus curvatus SMFM2016-NK on periodontal diseases and gut health in a rat model. To improve the effect of Lb. curvatus SMFM2016-NK-fermented milk administration for relieving periodontitis, the periodontitis rat models were treated with the following for 4 wk: 10% skim milk (normal), periodontitis + 10% skim milk (negative control), periodontitis + Lactobacillus rhamnosus GG-fermented milk (positive control), and periodontitis + Lb. curvatus SMFM2016-NK-fermented milk (PD+LCFM). Transcriptional analysis of inflammatory cytokines [tumor necrosis factor α (TNF-α), IL-1β, IL-6, and IL-10] was performed via quantitative reverse-transcription PCR. The changes in the oral and gut microbiomes after administering Lb. curvatus SMFM2016-NK-fermented milk were analyzed with metagenomics sequencing using DNA extracted from the oral gingival tissues and feces from the cecum of the rat models. After treatment with Lb. curvatus SMFM2016-NK-fermented milk, the relative gene expression levels of TNFA and IL1B in the gingiva decreased in the PD+LCFM group compared with those in the negative control group. In the oral microbiome, the proportion of the phylum Proteobacteria in the PD+LCFM group was lower than that in the negative control after treatment with Lb. curvatus SMFM2016-NK-fermented milk. For the effect in the gut, the relative gene expression levels of inflammatory cytokines in the colon between the normal and negative control groups were not different; however, the expression levels of TNFA and IL1B in the PD+LCFM and positive control groups, respectively, were lower than those in the negative control group. The composition and diversity of the gut microbiome differed among normal, periodontitis, and Lb. curvatus SMFM2016-NK-fermented milk treatment groups. These results indicate that Lb. curvatus SMFM2016-NK-fermented milk could alleviate periodontal and gut inflammation and change oral and gut microbiota.
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Affiliation(s)
- Y Choi
- Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - E Park
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea
| | - S Kim
- Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - J Ha
- Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - H Oh
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea
| | - Y Kim
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea
| | - Y Lee
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea
| | - Y Seo
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea
| | - J Kang
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea
| | - S Lee
- Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - H Lee
- Food Standard Research Center, Korea Food Research Institute, Jeollabuk-do 55365, Korea
| | - Y Yoon
- Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea; Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea.
| | - K-H Choi
- Department of Oral Microbiology, College of Dentistry, Wonkwang University, Iksan 54538, Korea.
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Kim DK, Lim HS, Eun KM, Seo Y, Kim JK, Kim YS, Kim MK, Jin S, Han SC, Kim DW. Subepithelial neutrophil infiltration as a predictor of the surgical outcome of chronic rhinosinusitis with nasal polyps. Rhinology 2021; 59:173-180. [PMID: 33129200 DOI: 10.4193/rhin20.373] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Neutrophils present as major inflammatory cells in refractory chronic rhinosinusitis with nasal polyps (CRSwNP), regardless of the endotype. However, their role in the pathophysiology of CRSwNP remains poorly understood. We investigated factors predicting the surgical outcomes of CRSwNP patients with focus on neutrophilic localization. METHODS We employed machine-learning methods such as the decision tree and random forest models to predict the surgical outcomes of CRSwNP. Immunofluorescence analysis was conducted to detect human neutrophil elastase (HNE), Bcl-2, and Ki-67 in NP tissues. We counted the immunofluorescence-positive cells and divided them into three groups based on the infiltrated area, namely, epithelial, subepithelial, and perivascular groups. RESULTS On machine learning, the decision tree algorithm demonstrated that the number of subepithelial HNE-positive cells, Lund-Mackay (LM) scores, and endotype (eosinophilic or non-eosinophilic) were the most important predictors of surgical outcomes in CRSwNP patients. Additionally, the random forest algorithm showed that, after ranking the mean decrease in the Gini index or the accuracy of each factor, the top three ranking factors associated with surgical outcomes were the LM score, age, and number of subepithelial HNE-positive cells. In terms of cellular proliferation, immunofluorescence analysis revealed that Ki-67/HNE-double positive and Bcl-2/HNE-double positive cells were significantly increased in the subepithelial area in refractory CRSwNP. CONCLUSION Our machine-learning approach and immunofluorescence analysis demonstrated that subepithelial neutrophils in NP tissues had a high expression of Ki-67 and could serve as a cellular biomarker for predicting surgical outcomes in CRSwNP patients.
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Affiliation(s)
- D-K Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital and Institute of New Frontier Research, Hallym University College of Medicine, Chuncheon, Republic of Korea; Division of Big Data and Artificial Intelligence, Hallym University College of Medicine, Chuncheon, Republic of Korea
| | - H-S Lim
- Department of Otorhinolaryngology-Head and Neck Surgery, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - K M Eun
- Department of Otorhinolaryngology-Head and Neck Surgery, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Y Seo
- Department of Otorhinolaryngology-Head and Neck Surgery, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - J K Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Y S Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - M-K Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - S Jin
- Department of Otorhinolaryngology-Head and Neck Surgery, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - S C Han
- Department of Otorhinolaryngology-Head and Neck Surgery, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - D W Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
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11
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Hong S, Ha S, Seo Y, Kim S. Analysis of Postoperative Outcomes in Patients with Intermittent Exotropia According to Preoperative Change of Angle of Deviation. Korean J Ophthalmol 2021; 35:130-135. [PMID: 33596620 PMCID: PMC8046620 DOI: 10.3341/kjo.2020.0140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 12/17/2020] [Indexed: 11/23/2022] Open
Abstract
Purpose The correlation between the existence of the preoperative condition of ≥10 prism diopters (PD) in patients with basic type of intermittent exotropia (IXT) and postoperative outcomes was analyzed. Methods The medical records of patients that underwent surgery for IXT were analyzed retrospectively. The analysis was conducted by dividing the patients into a group with change of <10 PD (group 1) and ≥10 PD (group 2) before the time of the surgery. Patients who received at least 6 months of follow-up after surgery were included. The age, sex, angle of deviation and stereoacuity of the patients were studied. Surgical success was defined as exodeviation of <10 PD or esodeviation of <4 PD at the final visit after the surgery. The correlation between clinical factors and surgical success rate was analyzed by using correlative analysis. Results A total of 129 patients participated in the study. There were 108 (83.7%) and 21 (16.3%) patients in groups 1 and 2, respectively. There were 89 (82.4%) and 17 (80.1%) patients with surgical successes in groups 1 and 2, respectively (p = 0.18). Moreover, 13 (12.0%) patients in group 1 and three (14.3%) patients in group 2 required reoperation, showing no significant difference (p = 0.12). There was no statistically significant correlation between surgical success and preoperative change of angle of deviation <10 PD (odds ratio, 1.78; p = 0.17). Conclusions Among the patients with basic type of IXT subjected to the analysis, 16.3% had a change of ≥10 PD before surgery, and there was no significant correlation between surgical success and preoperative change of angle of deviation.
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Affiliation(s)
- Suji Hong
- Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea
| | - Sukgyu Ha
- Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea
| | - Youngwoo Seo
- Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea
| | - Sunghyun Kim
- Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea
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12
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Kim M, Jeong M, Hur S, Cho Y, Park J, Jung H, Seo Y, Woo HA, Nam KT, Lee K, Lee H. Engineered ionizable lipid nanoparticles for targeted delivery of RNA therapeutics into different types of cells in the liver. Sci Adv 2021; 7:7/9/eabf4398. [PMID: 33637537 PMCID: PMC7909888 DOI: 10.1126/sciadv.abf4398] [Citation(s) in RCA: 117] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 01/11/2021] [Indexed: 05/08/2023]
Abstract
Ionizable lipid nanoparticles (LNPs) have been widely used for in vivo delivery of RNA therapeutics into the liver. However, a main challenge remains to develop LNP formulations for selective delivery of RNA into certain types of liver cells, such as hepatocytes and liver sinusoidal endothelial cells (LSECs). Here, we report the engineered LNPs for the targeted delivery of RNA into hepatocytes and LSECs. The effects of particle size and polyethylene glycol-lipid content in the LNPs were evaluated for the hepatocyte-specific delivery of mRNA by ApoE-mediated cellular uptake through low-density lipoprotein receptors. Targeted delivery of RNA to LSECs was further investigated using active ligands. Incorporation of mannose allowed the selective delivery of RNA to LSECs, while minimizing the unwanted cellular uptake by hepatocytes. These results demonstrate that engineered LNPs have great potential for the cell type-specific delivery of RNA into the liver and other tissues.
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Affiliation(s)
- M Kim
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 120-750, South Korea
| | - M Jeong
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 120-750, South Korea
| | - S Hur
- Severance Biomedical Science Institute, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, South Korea
| | - Y Cho
- Severance Biomedical Science Institute, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, South Korea
| | - J Park
- Fluorescence Core Imaging Center, Ewha Womans University, Seoul 120-750, South Korea
| | - H Jung
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 120-750, South Korea
| | - Y Seo
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 120-750, South Korea
| | - H A Woo
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 120-750, South Korea
| | - K T Nam
- Severance Biomedical Science Institute, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, South Korea
| | - K Lee
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 120-750, South Korea
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University, Jinju 52828, South Korea
| | - H Lee
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 120-750, South Korea.
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13
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Wang Z, Li L, Ariss RW, Coburn KM, Behbahani M, Xue Z, Seo Y. The role of biofilms on the formation and decay of disinfection by-products in chlor(am)inated water distribution systems. Sci Total Environ 2021; 753:141606. [PMID: 32890868 DOI: 10.1016/j.scitotenv.2020.141606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 08/07/2020] [Accepted: 08/08/2020] [Indexed: 06/11/2023]
Abstract
This study investigated the role of biofilms on the formation and decay of disinfection by-products (DBPs) in chlorine (Cl2) or monochloramine (NH2Cl) disinfected reactors under the conditions related to drinking water distribution systems (DWDSs). Biofilm analysis results revealed that at 0.5 mg/L of disinfectant residual, both Cl2 and NH2Cl were not effective to remove biofilms. As the disinfectant residual increased, biofilms could be eradicated by Cl2, while remaining biofilms were still present even under the highest allowable NH2Cl dose (4 mg/L) for 25 days. Low DBP formation was observed under the recommended minimum Cl2 residual (0.5 mg/L), which could be attributed to limited Cl2 reactions with biofilms, as well as a combination of the volatilization and biodegradation of DBPs. However, when Cl2 residuals reached 2 mg/L, DBP concentrations in bulk water increased sharply beyond the DBP formation of the feed solution, with trihalomethanes and haloacetic acids being the most prevalent DBP species. The sharp increase was temporary for 15 days because of the removal of biofilms. For unregulated DBPs, high levels of haloacetonitriles were observed as attached biofilms reacted with the increased Cl2 dose and provided an additional organic nitrogen source for nitrogenous DBP formation. When maximum Cl2 residual (4 mg/L) was applied, no further increase of DBPs was observed because of biofilm eradication. For NH2Cl disinfection, the DBP levels were much lower than those of Cl2 disinfection, with small differences in DBP formation for different NH2Cl residuals. Overall, this study provides insights into optimizing disinfection protocols for water utilities by balancing the benefits of disinfection application for biofilm control with minimized toxic DBP formation in DWDSs.
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Affiliation(s)
- Zhikang Wang
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, Guizhou Province 550025, PR China; Department of Chemical Engineering, University of Toledo, 3048 Nitschke Hall, 2801 W. Bancroft St., Toledo, OH 43606-3390, USA
| | - Lei Li
- Department of Civil and Environmental Engineering, University of Toledo, 3006 Nitschke Hall, 2801 W. Bancroft St., Toledo, OH 43606-3390, USA
| | - Robert W Ariss
- College of Medicine and Life Sciences, University of Toledo, 3000 Arlington Ave, Toledo, OH 43614-2595, USA
| | - Kimberly M Coburn
- Department of Civil and Environmental Engineering, University of Toledo, 3006 Nitschke Hall, 2801 W. Bancroft St., Toledo, OH 43606-3390, USA
| | - Mohsen Behbahani
- Department of Civil and Environmental Engineering, University of Toledo, 3006 Nitschke Hall, 2801 W. Bancroft St., Toledo, OH 43606-3390, USA
| | - Zheng Xue
- Department of Civil and Environmental Engineering, University of Toledo, 3006 Nitschke Hall, 2801 W. Bancroft St., Toledo, OH 43606-3390, USA
| | - Youngwoo Seo
- Department of Chemical Engineering, University of Toledo, 3048 Nitschke Hall, 2801 W. Bancroft St., Toledo, OH 43606-3390, USA; Department of Civil and Environmental Engineering, University of Toledo, 3006 Nitschke Hall, 2801 W. Bancroft St., Toledo, OH 43606-3390, USA.
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14
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Li L, Ning D, Jeon Y, Ryu H, Santo Domingo JW, Kang DW, Kadudula A, Seo Y. Ecological insights into assembly processes and network structures of bacterial biofilms in full-scale biologically active carbon filters under ozone implementation. Sci Total Environ 2021; 751:141409. [PMID: 32882545 PMCID: PMC8273922 DOI: 10.1016/j.scitotenv.2020.141409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 07/28/2020] [Accepted: 07/30/2020] [Indexed: 06/11/2023]
Abstract
To address the adverse effects of harmful algal blooms, there are increased demands over the implementation of ozone coupled with biologically active carbon (BAC) filters in the drinking water treatment plants. Although the microbial biofilms are vital elements to support the proper performance of BAC filters, except for taxonomic affiliations, little is known about the assembly mechanisms of microbial communities in the full-scale BAC filters. This study aimed to examine how the assembly processes and their associated factors (e.g., influent characteristics, biological interactions) drive the temporal dynamics of bacterial communities in full-scale BAC filters, which underwent ozone implementation (five consecutive seasons from 2017 to 2018). The results revealed that along with the increase of bacterial taxonomic richness and evenness, stochastic processes became more crucial to determine the bacterial community assembly in the summer and autumn after ozone implementation (relative contribution: 61.23% and 83.75%, respectively). Moreover, their corresponding networks possessed simple network structures with lower modularity than other seasons, which implied lesser biological interactions among bacterial populations. The correlation between taxonomic and predicted functional diversities using functional redundancy index indicated that relatively high levels of bacterial functional redundancy (>0.83) were generally present in BAC filters. However, compared to other seasons, significantly higher degrees of functional redundancy existed in the summer and autumn after ozone implementation (0.85 ± 0.01 and 0.86 ± 0.01, respectively). Overall, this work improves our understanding of the microbial ecology of full-scale BAC filters by providing a conceptual framework that characterizes bacterial biofilm assembly processes relevant to performance optimization of full-scale BAC filters.
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Affiliation(s)
- Lei Li
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, USA
| | - Daliang Ning
- Institute for Environmental Genomics and Department of Botany and Microbiology, University of Oklahoma, Norman, OK, USA
| | - Youchul Jeon
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, USA
| | - Hodon Ryu
- Water Infrastructure Division, Center for Environmental Solutions and Emergency Response, U.S. Environmental Protection Agency, Cincinnati, OH 45268, USA
| | - Jorge W Santo Domingo
- Water Infrastructure Division, Center for Environmental Solutions and Emergency Response, U.S. Environmental Protection Agency, Cincinnati, OH 45268, USA
| | - Dae-Wook Kang
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, USA
| | - Anusha Kadudula
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, USA
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, USA; Department of Chemical Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, USA.
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15
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Nakayama T, Oshima Y, Kusumoto S, Osaga S, Yamamoto J, Wakami K, Goto T, Sugiura T, Seo Y, Iida S, Ohte N. Clinical features, risk factors, and prognosis of anthracycline-induced cardiotoxicity in patients with malignant lymphoma who received a CHOP like regimen. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Anthracycline-induced cardiotoxicity is a serious complication in patients with malignant lymphoma (ML) who received chemotherapy, which threatens life prognosis and quality of life of patients. However, incidence and risk factors of cardiotoxicity in patients with ML who undergo intensive chemotherapy which aims complete remission is not clarified. Furthermore, prognosis after cardiotoxicity and that after recovery from cardiotoxicity have not been elucidated.
Method
We screened 443 ML patients who received either rituximab (R)-CHOP or CHOP regimen between January 2008 and December 2017 at Nagoya City University Hospital. Two handled forty-four patients who underwent echocardiography before and after chemotherapy were enrolled and data were analyzed retrospectively. Cardiotoxicity was defined as a decline in left ventricular ejection fraction (LVEF) of 10% or greater and an LVEF was below 50%. Partial recovery was defined as a 5% or more of increase in LVEF and an LVEF was ≥50% after cardiotoxicity. Complete recovery was defined as an increase in LVEF became more than 95% of the baseline value. Patient's basic characteristics, chemotherapeutic regimen, laboratory data, echocardiographic data, and prognosis were collected from the medical records by two cardiologists and two hematologists.
Result
At baseline, the median age was 71 years, the median cumulative dose of doxorubicin was 302 mg/m2 and the median LVEF was 69%. During the follow-up period, cardiotoxicity was observed in 52 out of 244 patients (21%), 30 patients (12%) had a symptomatic heart failure, and 5 patients died from cardiovascular cause. Thirty-five patients developed cardiotoxicity during the first year of chemotherapy. Multivariate analysis identified that only the baseline LVEF (HR 0.949, 95% CI 0.919–0.981, p=0.002) was an independent risk factor for cardiotoxicity. In our study, patients who received more than 200 mg/m2 of doxorubicin developed cardiotoxicity frequently. Among 52 patients who experienced cardiotoxicity, partial recovery and full recovery were observed in 18 (35%) and 4 (8%) patients, respectively. Four patients without recovery died due to heart failure and 1 patient with partial recovery died suddenly. Six out of 18 patients with partial recovery developed re-cardiotoxicity.
Conclusion
ML patients who undergo more than 200 mg/m2 of doxorubicin need a watchful follow-up. Only a baseline LVEF was an independent risk factor for cardiotoxicity. one third of patients with partial recovery developed re-cardiotoxicity.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- T Nakayama
- Nagoya City University, Department of Cardiology, Nagoya, Japan
| | - Y Oshima
- Nagoya City University, Department of Hematology and Oncology, Nagoya, Japan
| | - S Kusumoto
- Nagoya City University, Department of Hematology and Oncology, Nagoya, Japan
| | - S Osaga
- Nagoya City University, Clinical Research Management Center, Nagoya, Japan
| | - J Yamamoto
- Nagoya City University, Department of Cardiology, Nagoya, Japan
| | - K Wakami
- Nagoya City University, Department of Cardiology, Nagoya, Japan
| | - T Goto
- Nagoya City University, Department of Cardiology, Nagoya, Japan
| | - T Sugiura
- Nagoya City University, Department of Cardiology, Nagoya, Japan
| | - Y Seo
- Nagoya City University, Department of Cardiology, Nagoya, Japan
| | - S Iida
- Nagoya City University, Department of Hematology and Oncology, Nagoya, Japan
| | - N Ohte
- Nagoya City University, Department of Cardiology, Nagoya, Japan
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16
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Affiliation(s)
- Sabrina S. Alam
- Department of Chemical Engineering, University of Toledo, Toledo, Ohio 43606, United States
| | - Youngwoo Seo
- Department of Chemical Engineering, University of Toledo, Toledo, Ohio 43606, United States
- Department of Civil and Environmental Engineering, University of Toledo, Toledo, Ohio 43606, United States
| | - Yakov Lapitsky
- Department of Chemical Engineering, University of Toledo, Toledo, Ohio 43606, United States
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17
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Ishii K, Yoshikawa Y, Hyodo E, Seo Y, Ishizu T, Kihara H, Daimon M, Tanaka A, Watanabe H, Akasaka T, Ito H, Yoshikawa J. Diagnostic accuracy of left ventricular diastolic transverse strain imaging by speckle tracking echocardiography for diagnosing chest pain in diabetic patients. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Two-dimensional speckle tracking echocardiography (2D-STE) has been reported to be useful for the diagnosis of myocardial ischemia by detecting delayed relaxation (diastolic stunning) after an episode of angina. 2D-longitudinal strain is not specific besides ischemia such as diastolic dysfunction, and diabetes have been associated with abnormal longitudinal fibers. The aim is to evaluate the diagnostic accuracy of Left ventricular (LV) diastolic transverse strain imaging by STE to detect the presence of acute coronary syndrome (ACS) in diabetic patients with acute chest pain.
Methods
385 consecutive patients with acute chest pain and without wall motion abnormality, who were admitted to an emergency department (ED) at 1 of 12 clinical sites in Japan, were enrolled and underwent 2D-STE at ED. Left ventricular (LV) transverse strain values at aortic valve closure (A) and one-third of diastole duration (B) were measured. The strain imaging diastolic index (SI-DI) was value was determined as: (A − B)/A × 100% to assess the LV diastolic strain imaging and was used to identify the regional LV delayed relaxation. All patients underwent coronary CT or coronary angiography to establish the diagnosis of ACS. Clinicians were blinded to the 2D-STE results.
Results
Out of 385 patients, 2D-STE analysis was possible in 365 patients (94%). 76 patients were diabetic (DM+), and 289 patients were non-diabetic (DM-). With assessment of coronary CT or coronary angiography, ACS was diagnosed in 125 patients (34%). 2D-STE was obtained at a mean of 5.3 hours after chest pain episode. Transverse SI-DI of ischemic segments were significantly lower than those of non-ischemic segments (p value <0.001) in both diabetic and non-diabetic patients, and transverse SI-DI of both diabetic and non-diabetic patients demonstrated high area under curve (AUC) for detection of myocardial ischemia (Figure: RCA; right coronary artery, LAD; left anterior descending artery, LCX; left circumferencial artery). In diabetic patients, sensitivity, specificity, and negative predictive value for ACS of transverse SI-DI are 100%, 95%, 100% in RCA (a cut-off value of 36.2), and 86.4%, 95%, 93% in LAD (a cut-off value of 50.2), and 75%, 85%, 94% in LCX (a cut-off value of 52), respectively.
Conclusion
LV diastolic transverse strain imaging by 2D-STE at ED increase the sensitivity, specificity and accuracy to predict the presence of ACS in diabetic patients with chest pain, as well as non-diabetic patients. (UMIN000013859).
Figure 1. Transverse Strain (SI-DI): AUC (95% CI)
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- K Ishii
- Kansai Electric Power Hospital, Cardiology, Osaka, Japan
| | - Y Yoshikawa
- Kyoto University Graduate School of Medicine, Cardiology, Kyoto, Japan
| | - E Hyodo
- Nishinomiya Watanabe Cardiovascular Center, Cardiology, Nishinomiya, Japan
| | - Y Seo
- Tsukuba University Hospital, Cardiology, Tsukuba, Japan
| | - T Ishizu
- Tsukuba University Hospital, Cardiology, Tsukuba, Japan
| | - H Kihara
- Kihara Cardiovascular Clinic, Cardiology, Asahikawa, Japan
| | - M Daimon
- University of Tokyo Hospital, Cardiology, Tokyo, Japan
| | - A Tanaka
- Wakayama Medical University, Cardiology, Wakayama, Japan
| | - H Watanabe
- Tokyo Bay Urayasu/Ichikawa Medical Center, Cardiology, Urayasu, Japan
| | - T Akasaka
- Wakayama Medical University, Cardiology, Wakayama, Japan
| | - H Ito
- Okayama University Hospital, Cardiology, Okayama, Japan
| | - J Yoshikawa
- Nishinomiya Watanabe Cardiovascular Center, Cardiology, Nishinomiya, Japan
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Murai S, Sugiura T, Dohi Y, Takase H, Mizoguchi T, Yamashita S, Seo Y, Fujii S, Ohte N. Arterial stiffness could reflect increased cardiac load and reduced pulmonary function in the general population. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Pulmonary function is known to decrease with age and reduced pulmonary function has been reported to be associated with all-cause mortality and cardiovascular death. The association between pulmonary impairment and atherosclerosis was reported previously but has not been investigated sufficiently in the general population.
Purpose
We hypothesized that arterial stiffness could reflect increase of cardiac load and reduced pulmonary function. The present study aimed to investigate whether increased cardiac load and reduced pulmonary function could affect arterial stiffness in the general population.
Methods
Subjects undergoing their health check-up were enrolled. Plasma B-type natriuretic peptide (BNP) levels and serum high-sensitivity cardiac troponin I (hs-cTnI) levels were measured to evaluate cardiac load and myocardial damage. Radial augmentation index (rAI) was measured to investigate arterial stiffness using HEM-9000AI device. Subjects with an ST-T segment abnormality on the electrocardiogram, renal insufficiency, cancer, active inflammatory disease, or a history of cardiovascular events and pulmonary disease were excluded. Pulmonary function was assessed using spirometry by calculating forced vital capacity (FVC) as a percentage of predicted value (FVC%-predicted), forced expiratory volume in 1 second (FEV1) as a percentage of predicted value (FEV1%-predicted), and the ratio of FEV1 to FVC (FEV1/FVC).
Results
A total of 1100 subjects aged 57 years were enrolled and their median values of BNP and hs-cTnI were 15.5 and 2.3 pg/ml. The levels of rAI were significantly associated with the levels of BNP after adjustment for possible confounders in multivariate regression analysis, but were not with the levels of hs-TnI. While the parameters of pulmonary function were inversely associated with the levels of rAI and hs-cTnI after adjustment for possible confounders in the multivariate regression analysis, but not with the levels of BNP. The other multivariate regression analyses where BNP, hs-cTnI, parameters of pulmonary function, and the other possible factors were simultaneously included as independent variables revealed that the BNP levels and the FVC%-predicted or FEV1%-predicted, besides age, gender, smoking status, body mass index, blood pressure, heart rate, creatinine, fasting plasma glucose, and triglyceride, were significantly associated with the levels of rAI.
Conclusions
The significant associations of rAI with BNP and pulmonary function were revealed in the general population. These findings support that arterial stiffness could reflect increased cardiac load and reduced pulmonary function, in apparently healthy individuals.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- S Murai
- Nagoya City University Graduate School of Medical Scinece, Nagoya, Japan
| | - T Sugiura
- Nagoya City University Graduate School of Medical Scinece, Nagoya, Japan
| | - Y Dohi
- Nagoya Gakuin University, Department of Internal Medicine, Faculty of Rehabilitation, Seto, Japan
| | - H Takase
- Enshu Hospital, Department of Internal Medicine, Hamamatsu, Japan
| | - T Mizoguchi
- Nagoya City University Graduate School of Medical Scinece, Nagoya, Japan
| | - S Yamashita
- Nagoya City University Graduate School of Medical Scinece, Nagoya, Japan
| | - Y Seo
- Nagoya City University Graduate School of Medical Scinece, Nagoya, Japan
| | - S Fujii
- Asahikawa Medical University, Department of Laboratory Medicine, Asahikawa, Japan
| | - N Ohte
- Nagoya City University Graduate School of Medical Scinece, Nagoya, Japan
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19
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Jeon Y, Li L, Calvillo J, Ryu H, Santo Domingo JW, Choi O, Brown J, Seo Y. Impact of algal organic matter on the performance, cyanotoxin removal, and biofilms of biologically-active filtration systems. Water Res 2020; 184:116120. [PMID: 32726741 PMCID: PMC7658049 DOI: 10.1016/j.watres.2020.116120] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 06/08/2020] [Accepted: 06/25/2020] [Indexed: 06/11/2023]
Abstract
The occurrence of harmful algal blooms dominated by toxic cyanobacteria has induced continuous loadings of algal organic matter (AOM) and toxins in drinking water treatment plants. However, the impact of AOM on the active biofilms and microbial community structures of biologically-active filtration (BAF), which directly affects the contaminant removal, is not well understood. In this study, we systematically examined the effects of AOM on BAF performance and bacterial biofilm formation over 240 days, tracing the removal of specific AOM components, a cyanotoxin [microcystin-LR (MC-LR)], and microbial community responses. The component analysis (excitation and emission matrix analysis) results for AOM revealed that terrestrial humic-like substances showed the highest removal among all the identified components and were strongly correlated to MC-LR removal. In addition, reduced empty bed contact time and deactivation of biofilms significantly decreased BAF performances for both AOM and MC-LR. The active biofilm, bacterial community structure, and mlrA gene (involved in microcystin degradation) abundance demonstrated that bacterial biofilm composition responded to AOM and MC-LR, in which Rhodocyclaceae, Saprospiraceae, and Comamonadaceae were dominant. In addition, MC-LR biodegradation appeared to be more active at the top than at the bottom layer in BAF. Overall, this study provides deeper insights into the role of biofilms and filter operation on the fate of AOM and MC-LR in BAF.
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Affiliation(s)
- Youchul Jeon
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH, 43606, United States
| | - Lei Li
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH, 43606, United States
| | - Jose Calvillo
- Department of Chemical and Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, 43606, United States
| | - Hodon Ryu
- Water Infrastructure Division, Center for Environmental Solutions and Emergency Response, U.S. Environmental Protection Agency, Cincinnati, OH, 45268, United States
| | - Jorge W Santo Domingo
- Water Infrastructure Division, Center for Environmental Solutions and Emergency Response, U.S. Environmental Protection Agency, Cincinnati, OH, 45268, United States
| | - Onekyun Choi
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH, 43606, United States
| | - Jess Brown
- Carollo Engineers' Research and Development Practice, Costa Mesa, CA, 92626, United States
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH, 43606, United States; Department of Chemical and Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, 43606, United States.
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Seo Y, Kempton A, Rogers O, Baine S, Lewis S, Adegboye K, Haile A, Griffin D, Peterson E, Pozsgai E, Rodino-Klapac L. LIMB GIRDLE MUSCULAR DYSTROPHIES. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Pozsgai E, Griffin D, Peterson E, Kempton A, Rogers O, Seo Y, Rodino-Klapac L. LIMB GIRDLE MUSCULAR DYSTROPHIES. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Pozsgai E, Peterson E, Kempton A, Rogers O, Seo Y, Rodino-Klapac L. LIMB GIRDLE MUSCULAR DYSTROPHIES. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Krishnan A, Zhang Y, Balaban M, Seo Y, Mou X. Taxonomic and Genotypical Heterogeneity of Microcystin degrading Bacterioplankton in Western Lake Erie. Harmful Algae 2020; 98:101895. [PMID: 33129453 DOI: 10.1016/j.hal.2020.101895] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 08/20/2020] [Accepted: 08/22/2020] [Indexed: 06/11/2023]
Abstract
Microcystins (MCs) are among the predominant cyanotoxins that are primarily degraded by heterotrophic bacteria in various freshwater environments, including Lake Erie, a Laurentian Great Lake. However, despite the prevalence of MCs in Lake Erie basins, our knowledge about the taxonomic diversity of local MC-degrading bacteria is largely limited. The current study obtained thirty-four MC-degrading bacterial pure isolates from Lake Erie surface water and characterized their taxonomical and phenotypic identities as well as their MC-degradation rates under different pH, temperature, availability of organic substrates and with other MC-degrading isolates. Obtained MC-degrading isolates included both Gram-positive (18 isolates of Actinobacteria and Firmicutes) and Gram-negative bacteria (16 isolates of Gamma-proteobacteria); and 7 of these isolates were motile, and 13 had the capacity to form biofilms. In general, MC-degradation rates of the isolates were impacted by temperature and pH but insensitive to the presence of cyanobacterial exudates. At the optimal temperature (30-35°C) and pH (7-8), individual isolates degraded MC-LR, the most abundant MC isomer, at an average of 0.20 µg/mL/hr. With additions of cyanobacterial exudates, only Pseudomonas sp. LEw-2029, a non-motile biofilm maker, showed increased MC degradation (0.25 µg/mL/hr). Five out of nine tested dual culture mixtures showed rises in MC degradation rates than their corresponding monocultures; the highest rate reached 0.40 µg/mL/hr for the pair LEw-(1132 + 2029). PCR amplification of mlrA genes yielded negative results for all isolates; subsequent enzyme assay-Mass Spectrum analysis identified no product associated with the mlr gene-based MC degradation pathway. Collectively, our results demonstrated that a diversity of indigenous Lake Erie bacteria can degrade MCs via a novel mlr-independent pathway. Obtained MC degraders, especially Pseudomonas sp. LEw-2029, may serve as candidates for the development of biological filters to remove cyanotoxins in water treatment systems.
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Affiliation(s)
- Anjali Krishnan
- Biological Science Department, Kent State University, Kent Ohio 44242, U.S.A
| | - Yuqin Zhang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Tiantan Xi Li, Beiing 100050, China
| | - Meaghan Balaban
- Biological Science Department, Kent State University, Kent Ohio 44242, U.S.A
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, Mail stop 307, 3006 Nitschke Hall, Toledo, OH, 43606, U.S.A
| | - Xiaozhen Mou
- Biological Science Department, Kent State University, Kent Ohio 44242, U.S.A..
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Planchard D, Shin D, Choi J, Seo Y, Jung J, Park M, Reck M. 1377P Exploratory analyses of efficacy from a phase III study comparing SB8, a proposed bevacizumab biosimilar, and reference bevacizumab in patients with metastatic or recurrent non-squamous NSCLC. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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25
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Li L, Jeon Y, Ryu H, Santo Domingo JW, Seo Y. Assessing the chemical compositions and disinfection byproduct formation of biofilms: Application of fluorescence excitation-emission spectroscopy coupled with parallel factor analysis. Chemosphere 2020; 246:125745. [PMID: 31927366 PMCID: PMC7485375 DOI: 10.1016/j.chemosphere.2019.125745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 12/21/2019] [Accepted: 12/23/2019] [Indexed: 06/10/2023]
Abstract
There are increased concerns over the contributions of biofilms to disinfection byproduct (DBP) formation in engineered water systems (EWS). However, monitoring the biomolecular characteristics of biofilms to understand their impacts on DBP formation has been a great challenge as it requires complex analytical techniques. This study aimed to examine the applicability of fluorescence excitation-emission matrices (EEMs) coupled with parallel factor analysis (PARAFAC) to assess the chemical compositions and DBP formation of biofilms. Biofilms were collected from reactors grown on R2A media, as well as two drinking water-related organic substrates such as humic substances and algal organic matter. The chemical composition and formation of carbonaceous and nitrogenous DBPs of biofilms were continuously monitored every 21 days for 168 days and correlated with the derived EEM-PARAFAC components. Results indicated that all biofilm samples comprised mostly of protein-like components (∼90%), and to a lesser extent, humic-like components (∼10%). Strong correlations were generally found between tryptophan-like substances and the studied DBP formation (R2min ≥ 0.76, P < 0.05), indicating that they play a major role in producing biofilm-derived DBPs upon chlorination. Moreover, significant discrepancies between the chemical compositions and DBP formation of biofilms and their corresponding feed solutions were observed, likely due to biotransformation and biosorption processes. Overall, this work highlights that EEM-PARAFAC analysis is a promising tool to monitor the biomolecular characteristics of biofilm components and to predict the subsequent DBP formation in optimizing disinfection protocols for EWS.
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Affiliation(s)
- Lei Li
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048, Nitschke Hall, Toledo, OH, USA
| | - Youchul Jeon
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048, Nitschke Hall, Toledo, OH, USA
| | - Hodon Ryu
- Water Systems Division, National Risk Management Research Laboratory, U.S. Environmental Protection Agency, Cincinnati, OH, 45268, USA
| | - Jorge W Santo Domingo
- Water Systems Division, National Risk Management Research Laboratory, U.S. Environmental Protection Agency, Cincinnati, OH, 45268, USA
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048, Nitschke Hall, Toledo, OH, USA; Department of Chemical Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, USA.
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Xiao Y, Seo Y, Lin Y, Li L, Muhammad T, Ma C, Li Y. Electromagnetic fields for biofouling mitigation in reclaimed water distribution systems. Water Res 2020; 173:115562. [PMID: 32044595 DOI: 10.1016/j.watres.2020.115562] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/21/2020] [Accepted: 01/27/2020] [Indexed: 06/10/2023]
Abstract
Biofouling is ubiquitous in reclaimed water distribution systems and causes various industrial, economic, and health issues. This paper investigated the anti-biofouling efficacy of electromagnetic fields (EMFs) for agricultural emitters used for two types of reclaimed water. 16S rRNA gene sequencing and X-ray diffraction were applied to determine the microbial communities and mineral compositions in biofilms. The obtained results revealed that EMF treatment significantly changed the bacterial communities and reduced their diversities in biofilm by affecting water quality parameters. Network analysis results indicated that EMFs were detrimental to the co-occurrence patterns of mutualistic relationships among bacterial species, destroyed the connectivity and complexity of the networks, and inhibited biofilm formation [decreased total biomass and extracellular polymeric substance (EPS) content]. EMF treatment could also decrease the deposition of mineral precipitates, reducing the carbonate and silicate content in biofilm. The decrease of EPS content appeared to reduce biofilm-induced mineral crystallization, while the ion precipitations accelerated by EMFs caused an erosive effect on biofilm. The results demonstrated that EMF treatment is an effective, chemical-free, and anti-biofouling treatment method with great potential for biofouling control in reclaimed water distribution systems.
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Affiliation(s)
- Yang Xiao
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048, Nitschke Hall, Toledo, OH, USA; Department of Chemical Engineering, University of Toledo, Mail Stop 307, 3048, Nitschke Hall, Toledo, OH, USA
| | - Yufei Lin
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China
| | - Lei Li
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048, Nitschke Hall, Toledo, OH, USA
| | - Tahir Muhammad
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China
| | - Changjian Ma
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China
| | - Yunkai Li
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China.
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Kikuchi S, Kitada S, Wakami K, Goto T, Sugiura T, Seo Y, Ohte N. P743 Right ventricular function is important for exercise capacity in patients at risk of heart failure. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background and Purpose
It is important to evaluate exercise capacity to detect the development of heart failure (HF) in patients with heart disease. The pathology of exercise capacity is multi-factorial, and cardiac function is recognized as one of the most important determinants. However, the correlation between right ventricular (RV) function and exercise capacity is not fully understood in the subjects without HF. Therefore, we assessed the relationship between RV function and exercise capacity, both in patients with HF (HF+) and in patients with heart disease but not developed HF (HF-).
Methods
Two hundred and fifty-two patients with heart disease who underwent both Doppler echocardiography at rest and cardio-pulmonary exercise testing (CPET) for the assessment of heart function were enrolled (HF+: n = 142, HF-: n = 110). We measured left ventricular ejection fraction (LVEF), peak early diastolic transmitral flow velocity (E), peak late diastolic transmitral flow velocity (A), early diastolic mitral annular velocity (e’), left atrial volume (LAV), and tricuspid annular plane systolic excursion (TAPSE) by echocardiography. After echocardiographic examination, symptom-limited exercise testing was performed with simultaneous respiratory gas analysis, and peak oxygen consumption (pVO2) was determined. Blood examination including hemoglobin (Hb) and brain natriuretic peptide (BNP) was done on the same day.
Results
There were significant relationships between pVO2 and LVEF (r = 0.16, p = 0.005), e" (r = 0.51, p < 0.0001), E/e" (r=-0.47, p < 0.0001), LAV (r=-0.21, p = 0.0002), and TAPSE (r = 0.33, p < 0.0001) in the whole subjects. In the multiple regression analyses, age, Hb, E/e" and TAPSE were selected as significant determinants for pVO2 both in HF+ (R²=0.39, p < 0.0001) and HF- (R²=0.33, p < 0.0001).
Conclusion
RV function is the prime determinant of exercise capacity in patients at risk of HF, as well as in patients with HF.
Abstract P743 Figure.
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Affiliation(s)
- S Kikuchi
- Nagoya City University Graduate School of Medical Sciences, Department of Cardio-Renal Medicine and Hypertension, Nagoya, Japan
| | - S Kitada
- Nagoya City University Graduate School of Medical Sciences, Department of Cardio-Renal Medicine and Hypertension, Nagoya, Japan
| | - K Wakami
- Nagoya City University Graduate School of Medical Sciences, Department of Cardio-Renal Medicine and Hypertension, Nagoya, Japan
| | - T Goto
- Nagoya City University Graduate School of Medical Sciences, Department of Cardio-Renal Medicine and Hypertension, Nagoya, Japan
| | - T Sugiura
- Nagoya City University Graduate School of Medical Sciences, Department of Cardio-Renal Medicine and Hypertension, Nagoya, Japan
| | - Y Seo
- Nagoya City University Graduate School of Medical Sciences, Department of Cardio-Renal Medicine and Hypertension, Nagoya, Japan
| | - N Ohte
- Nagoya City University Graduate School of Medical Sciences, Department of Cardio-Renal Medicine and Hypertension, Nagoya, Japan
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Ishii K, Hyodo E, Seo Y, Ishizu T, Tada E, Kihara H, Daimon M, Tanaka A, Akasaka T, Watanabe H, Ito H, Yoshikawa J. 1225 Diagnostic accuracy of left ventricular diastolic strain imaging by speckle tracking echocardiography in detecting ischemic etiology of acute chest pain. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
none
OnBehalf
A TRAC-SI Multicenter Trial
Background
Two-dimensional speckle tracking echocardiography (2D-STE) has been reported to be useful for the diagnosis of myocardial ischemia by detecting delay in regional myocardial expansion (diastolic stunning) up to many hours after an episode of angina. The aim is to evaluate the diagnostic accuracy of Left ventricular (LV) diastolic longitudinal, circumferential, transverse and radial strain imaging by STE to detect the presence of acute coronary syndrome (ACS) in patients with acute chest pain.
Methods
388 consecutive patients with acute chest pain and without wall motion abnormality, who were admitted to an emergency department (ED) at 1 of 12 clinical sites in Japan, were enrolled and underwent 2D-STE at ED. Left ventricular (LV) longitudinal, circumferential, transverse and radial strain values at aortic valve closure (A) and one-third of diastole duration (B) were measured. The strain imaging diastolic index (SI-DI) was value was determined as: (A-B)/A × 100% to assess the LV diastolic strain imaging and was used to identify the regional LV delayed relaxation. All patients underwent coronary CT or coronary angiography to establish the diagnosis of ACS. Clinicians were blinded to the 2D-STE results.
Results
Out of 388 patients, 2D-STE analysis was possible in 358 patients (92%). With assessment of coronary CT or coronary angiography, ACS was diagnosed in 118 patients (33%). 2D-STE was obtained at a mean of 5.3 hours after chest pain episode. SI-DI of longitudinal, circumferential, transverse and radial strain of ischemic segments were significantly lower than those of non-ischemic segments (p value < 0.001), and transverse and radial SI-DI demonstrated high diagnostic accuracy, compared with longitudinal SI-DI (Figure 1). Sensitivity, specificity, and negative predictive value for ACS of transverse SI-DI are 87%, 88%, % and 95%, respectively, using a cut-off value of 63.3.
Conclusion
LV diastolic strain imaging by 2D-STE at ED increase the sensitivity, specificity and accuracy to predict the presence of ACS in patients with chest pain. Compared with longitudinal diastolic strain imaging, transverse diastolic strain imaging is more sensitive marker to detect the myocardial ischemic episode (UMIN000013859).
Abstract 1225 Figure 1
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Affiliation(s)
- K Ishii
- Kansai Electric Power Hospital, Cardiology, Osaka, Japan
| | - E Hyodo
- Nishinomiya Watanabe Cardiovascular Center, Cardiology, Nishinomiya, Japan
| | - Y Seo
- Tsukuba University Hospital, Cardiology, Tsukuba, Japan
| | - T Ishizu
- Tsukuba University Hospital, Cardiology, Tsukuba, Japan
| | - E Tada
- Kansai Electric Power Medical Reseach Institute, Cardiology, Osaka, Japan
| | - H Kihara
- Kihara Cardiovascular Clinic, Cardiology, Asahikawa, Japan
| | - M Daimon
- University of Tokyo, Cardiology, Tokyo, Japan
| | - A Tanaka
- Wakayama Medical University, Cardiology, Wakayama, Japan
| | - T Akasaka
- Wakayama Medical University, Cardiology, Wakayama, Japan
| | - H Watanabe
- Tokyo Bay Urayasu/Ichikawa Medical Center , Cardiology, Urayasu, Japan
| | - H Ito
- Okayama University Hospital, Cardiology, Okayama, Japan
| | - J Yoshikawa
- Nishinomiya Watanabe Cardiovascular Center, Cardiology, Nishinomiya, Japan
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Seo Y, Rhee CS, Kim H. The distinctive anatomical phenotypes of pap non-adherent osa patients and clinical outcome of alternative treatments after failure of pap therapy. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wei Z, Li W, Zhao D, Seo Y, Spinney R, Dionysiou DD, Wang Y, Zeng W, Xiao R. Electrophilicity index as a critical indicator for the biodegradation of the pharmaceuticals in aerobic activated sludge processes. Water Res 2019; 160:10-17. [PMID: 31129377 DOI: 10.1016/j.watres.2019.05.057] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 05/14/2019] [Accepted: 05/18/2019] [Indexed: 06/09/2023]
Abstract
Improving biodegradation of pharmaceuticals during wastewater treatment is critical to control the release of emerging micropollutants to natural waters. In this study, biodegradation of six model pharmaceuticals was investigated at different initial concentrations in two discrete activated sludge systems, and moreover, the correlation was explored between the biodegradation rate and key molecular properties of the contaminants. First, the biodegradation rates of the pharmaceuticals were measured fitting a pseudo first-order kinetic model to the experimental kinetic data. The degradation rate constants (kbio) were found to negatively correlate to the initial concentration of the chemicals, indicating an inhibitory effect on the microorganisms by the pharmaceuticals. Further examinations of the rate data against the key molecular properties of the pharmaceuticals revealed, for the first time, that the electrophilicity index (ω), a measure of electrophilic power, served as a better indicator of the biodegradability and predictive parameter for the kbio than the conventional log KOW (a measure of hydrophobicity) in the two discrete aerobic activated sludge systems. However, the correlation strength (goodness‒of‒fit) between ω and kbio deteriorated when the reactor turned from aerobic to anoxic and anaerobic conditions, suggesting that electron transfer from pharmaceutical molecules to enzymes was inhibited when dissolved oxygen was deficit or absent. Our results show that ω can potentially serve as a straightforward and robust indicator for predicting the biodegradability of pharmaceutical in conventional activated sludge processes.
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Affiliation(s)
- Zongsu Wei
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China; Section for Biological and Chemical Engineering, Department of Engineering, Aarhus University, Hangøvej 2, DK-8200, Aarhus N, Denmark
| | - Wei Li
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Dongye Zhao
- Section for Biological and Chemical Engineering, Department of Engineering, Aarhus University, Hangøvej 2, DK-8200, Aarhus N, Denmark
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, Toledo, OH, 43606, United States
| | - Richard Spinney
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, 43210, United States
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH, 45221, United States
| | - Yong Wang
- School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Weizhi Zeng
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Ruiyang Xiao
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China.
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Li L, Jeon Y, Lee SH, Ryu H, Santo Domingo JW, Seo Y. Dynamics of the physiochemical and community structures of biofilms under the influence of algal organic matter and humic substances. Water Res 2019; 158:136-145. [PMID: 31026675 PMCID: PMC6563348 DOI: 10.1016/j.watres.2019.04.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 04/04/2019] [Accepted: 04/07/2019] [Indexed: 05/22/2023]
Abstract
Increased loading of algal organic matter (AOM) during harmful algal blooms not only burdens water treatment processes but also challenges safe drinking water delivery. While organic constituents promote biofilm growth in drinking water distribution systems (DWDS), the effects of AOM on biofilm formation in DWDS are not well understood. Herein, three parallel biofilm reactors were used to assess and compare how treated AOM- and humic substance (HS)-impacted bulk water, and R2A medium (a control) affect biofilm development for 168 days. The 16S rRNA gene sequencing analysis revealed that the bacterial communities in biofilms were clustered with the organic matter types in bulk water, where Family Comamonadaceae was the most dominant but showed different temporal dynamics depending on the organic matter characteristics in bulk water. Higher diversity was observed in the biofilms grown in AOM-impacted bulk water (BFAOM) than biofilms grown in HS-impacted (BFHS) and R2A-impacted bulk water (BFR2A) as the biofilms matured. In addition, some taxa (e.g., Rhodobacteraceae and Sphingomonadaceae) were enriched in BFAOM compared to BFHS and BFR2A. The biofilm image analysis results indicated that compared to BFHS, BFAOM and BFR2A had relatively thinner and heterogeneous physical structures with lower amounts of cell biomass, extracellular polymeric substances (EPS), and higher EPS protein/polysaccharide ratios. Overall, this study revealed how AOM- and HS-impacted bulk water shape the physiochemical and community structures of biofilms, which can provide insights into assessing biofilm-associated risks and optimizing disinfection practices for biofilm control in DWDS.
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Affiliation(s)
- Lei Li
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, USA
| | - Youchul Jeon
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, USA
| | - Sang-Hoon Lee
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, USA
| | - Hodon Ryu
- Water Systems Division, National Risk Management Research Laboratory, U.S. Environmental Protection Agency, Cincinnati, OH, 45268, USA
| | - Jorge W Santo Domingo
- Water Systems Division, National Risk Management Research Laboratory, U.S. Environmental Protection Agency, Cincinnati, OH, 45268, USA
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, USA; Department of Chemical Engineering, University of Toledo, Mail Stop 307, 3048 Nitschke Hall, Toledo, OH, USA.
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Li Z, Tamari K, Seo Y, Minami K, Takahashi Y, Otani K, Suzuki O, Isohashi F, Ogawa K. PO-1082 Dihydroouabain is a novel radiosensitizer identified by high throughput screening. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31502-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Tamari K, Li Z, Otani K, Takahashi Y, Minami K, Seo Y, Suzuki O, Isohashi F, Ogawa K. EP-2166 Ro90-7501 is a novel radiosensitizer which inhibits ATM phosphorylation and DNA repair. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)32586-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Jeung S, Kang SM, Seo Y, Yu H, Baek CH, Kim H, Yang WS, Park SK. A Case Series of Asymptomatic Hemodialysis Catheter-Related Right Atrial Thrombi That Are Incidentally Detected Prior to Kidney Transplantation. Transplant Proc 2018; 50:3172-3180. [PMID: 30503665 DOI: 10.1016/j.transproceed.2018.08.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 08/29/2018] [Indexed: 11/26/2022]
Abstract
A hemodialysis (HD) catheter-related right atrial thrombus (RAT) is rarely encountered prior to kidney transplantation (KT) but necessitates a decision about whether to anticoagulate and/or delay the surgery. There is controversy surrounding the clinical implications of a RAT in this situation. It is sometimes considered fatal but other opinions consider it to be benign, especially when incidentally detected. We reviewed the clinical characteristics, management, and outcomes of a patient series with HD catheter-related RAT detected prior to KT and speculated on its clinical significance. Among 3677 cases of KT performed on 3607 patients between January 1997 and September 2015 in our single tertiary center, 11 cases of HD catheter-related RAT detected on transthoracic echocardiography (TTE) prior to KT were included for analysis. The average maximal diameter of the RAT was 23.2 ± 16.3 (SD in mm) and 9 (81.8%) of these 11 patients had no symptoms associated with the RAT. Four patients (36.3%) had their catheters replaced, 5 patients (45.5%) had their catheters removed, and the catheters were maintained in the remaining 2 patients (18.2%). Six patients (54.5%) were anticoagulated with either heparin or warfarin. However all 11 patients had a successful KT suggesting that a HD catheter-related RAT incidentally detected prior to this surgery may not be as serious as previously considered and should not be a reason for delaying the transplantation.
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Affiliation(s)
- S Jeung
- Division of Nephrology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S-M Kang
- Division of Nephrology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Y Seo
- Division of Nephrology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H Yu
- Division of Nephrology, Department of Internal Medicine, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Republic of Korea
| | - C H Baek
- Division of Nephrology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H Kim
- Division of Nephrology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - W S Yang
- Division of Nephrology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S-K Park
- Division of Nephrology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
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Isohashi F, Otani K, Tamari K, Seo Y, Suzuki O, Mabuchi S, Kimura T, Ogawa K. Rectal Dose-Volume Parameters and a Source Strength of Ir-192 are Significant Independent Predictors of Late Rectal Morbidity in Patients with Computed Tomography-Based Image-Guided Brachytherapy for Cervical Cancer. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.1708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Tissenbaum H, Seo Y, Kingsley S, Walker G, Mondoux MA. REGULATION OF GLUCOSE STORAGE EXTENDS LIFESPAN AND PROMOTES HEALTHSPAN. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- H Tissenbaum
- Department of Molecular, Cell and Cancer Biology, Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States
| | - Y Seo
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - S Kingsley
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - G Walker
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - M A Mondoux
- Department of Biology, College of the Holy Cross, Worcester, MA, USA
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Takemoto N, Suzuki M, Seo Y, Ogawa K, Inohara H. Radiotherapy alone for human papillomavirus-related locally advanced oropharyngeal squamous cell carcinoma: A single-arm, phase II study. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy287.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Seo Y, Yamamoto M, Machino-Ohtsuka T, Ishizu T. P1588Importance to identify the cause of tricuspid regurgitation by 3-dimensional echocardiography in heart failure patients after cardiac implantable electronic device implantations. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Y Seo
- University of Tsukuba, Ibaraki, Japan
| | | | | | - T Ishizu
- University of Tsukuba, Ibaraki, Japan
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Machino T, Seo Y, Ishizu T, Yamamoto M, Aonuma K. P4414A Clinical and Echocardiographic Score to Identify Heart Failure with Preserved Ejection Fraction in Patients with Atrial Fibrillation. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- T Machino
- University of Tsukuba, Tsukuba, Japan
| | - Y Seo
- University of Tsukuba, Tsukuba, Japan
| | - T Ishizu
- University of Tsukuba, Tsukuba, Japan
| | | | - K Aonuma
- University of Tsukuba, Tsukuba, Japan
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Ishii K, Hyodo E, Seo Y, Ishizu T, Tada E, Kihara H, Daimon M, Tanaka A, Akasaka T, Ito H, Watanabe H, Yoshikawa J. P2746Two-dimensional speckle tracking echocardiography for early triage of patients with acute chest pain: a TRAC-SI multicenter trial. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- K Ishii
- Kansai Electric Power Hospital, Cardiology, Osaka, Japan
| | - E Hyodo
- Nishinomiya Watanabe Cardiovascular Center, Cardiology, Nishinomiya, Japan
| | - Y Seo
- Tsukuba University Hospital, Cardiology, Tsukuba, Japan
| | - T Ishizu
- Tsukuba University Hospital, Cardiology, Tsukuba, Japan
| | - E Tada
- Kansai Electric Power Medical Reseach Institute, Cardiology, Osaka, Japan
| | - H Kihara
- Kihara Cardiovascular Clinic, Cardiology, Asahikawa, Japan
| | - M Daimon
- University of Tokyo, Cardiology, Tokyo, Japan
| | - A Tanaka
- Wakayama Medical University, Cardiology, Wakayama, Japan
| | - T Akasaka
- Wakayama Medical University, Cardiology, Wakayama, Japan
| | - H Ito
- Okayama University Hospital, Cardiology, Okayama, Japan
| | - H Watanabe
- Tokyo Bay Urayasu/Ichikawa Medical Center, Cardiology, Urayasu, Japan
| | - J Yoshikawa
- Nishinomiya Watanabe Cardiovascular Center, Cardiology, Nishinomiya, Japan
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Bae Y, Kim J, Kim S, Jung J, Yoon S, Seo Y. Relationship between alcohol-related facial flushing and carotid atherosclerosis. Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.06.775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Behbahani M, Lin B, Phares TL, Seo Y. Understanding the impact of water distribution system conditions on the biodegradation of haloacetic acids and expression of bacterial dehalogenase genes. J Hazard Mater 2018; 351:293-300. [PMID: 29554526 DOI: 10.1016/j.jhazmat.2018.02.047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 02/22/2018] [Accepted: 02/23/2018] [Indexed: 06/08/2023]
Abstract
The objective of this study is to evaluate the influence of water distribution system conditions (pH, total organic carbon, residual chlorine, and phosphate) on haloacetic acids (HAAs) biodegradation. A series of batch microcosm tests were conducted to determine biodegradation kinetics and collected biomass was used for real time quantitative reverse transcription polymerase chain reaction analyses to monitor how these drinking water distribution system conditions affect the relative expression of bacterial dehalogenase genes. It was observed that tested water distribution system conditions affected HAA biodegradation with different removal efficiencies (0-100%). HAA biodegradation was improved in tested samples with TOC (3 mg/L) and pH 8.5 compared to those of TOC (0 mg/L) and pH 7, respectively. However, slight improvement was observed with the increased PO4 concentration (3.5 mg/L), and the presence of residual chlorine even at low concentration prohibited biodegradation of HAAs. The observed trend in the relative expression of dehII genes was compatible with the HAA biodegradation trend. Overall relative expression ratio of dehII genes was lower at pH 7, phosphate (0.5 mg/L), and TOC (0 mg/L) in comparison with pH 8.5, phosphate (3.5 mg/L), and TOC (3 mg/L) in the same experimental conditions.
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Affiliation(s)
- Mohsen Behbahani
- Department of Civil and Environmental Engineering, University of Toledo, 2801 W. Bancroft St, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH 43606, USA
| | - Boren Lin
- Department of Bioengineering Engineering, University of Toledo, 2801 W. Bancroft St, Mail Stop 303, 5051 Nitschke Hall, Toledo, OH 43606, USA
| | - Tamara L Phares
- Department of Bioengineering Engineering, University of Toledo, 2801 W. Bancroft St, Mail Stop 303, 5051 Nitschke Hall, Toledo, OH 43606, USA
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, 2801 W. Bancroft St, Mail Stop 307, 3006 Nitschke Hall, Toledo, OH 43606, USA; Department of Chemical Engineering, University of Toledo, 2801 W. Bancroft St, 3048 Nitschke Hall, Toledo, OH 43606, USA.
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Cai M, Hu J, Wells G, Seo Y, Spinney R, Ho SH, Dionysiou DD, Su J, Xiao R, Wei Z. Correction to Understanding Mechanisms of Synergy between Acidification and Ultrasound Treatments for Activated Sludge Dewatering: From Bench to Pilot-Scale Investigation. Environ Sci Technol 2018; 52:6077. [PMID: 29717608 DOI: 10.1021/acs.est.8b02098] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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Ryu KJ, Yoou MS, Seo Y, Yoon KW, Kim HM, Jeong HJ. Therapeutic effects of Artemisia scoparia
Waldst. et Kitaib in a murine model of atopic dermatitis. Clin Exp Dermatol 2018; 43:798-805. [DOI: 10.1111/ced.13565] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/30/2017] [Indexed: 01/21/2023]
Affiliation(s)
- K. J. Ryu
- Department of Pharmacology; College of Korean Medicine; Kyung Hee University; Seoul Korea
| | - M. S. Yoou
- Department of Pharmacology; College of Korean Medicine; Kyung Hee University; Seoul Korea
| | - Y. Seo
- Division of Marine Environment and Bioscience; Korea Maritime University; Busan Korea
| | - K. W. Yoon
- Department of Biotechnology; Hoseo University; Asan Chungnam Korea
| | - H. M. Kim
- Department of Pharmacology; College of Korean Medicine; Kyung Hee University; Seoul Korea
| | - H. J. Jeong
- Department of Food Science and Technology; Hoseo University; Asan Chungnam Korea
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Park K, Lee Y, Seo Y, Lee J, Kim C. 126 cAMP response element-binding protein 1 (CREB) is a β-catenin-regulated transcription factor in squamous cell carcinoma (SCC) cells. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Park I, Jung S, Seo Y, Oh S, Lee K, Kim S, Lee Y, Kim S. 0982 Differential Role of Sleep Disturbance and Stress Level on Depressive Symptoms and Anxiety. Sleep 2018. [DOI: 10.1093/sleep/zsy061.981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- I Park
- Seoul National University Hospital, Seoul, Republic of Korea, KOREA, REPUBLIC OF
| | - S Jung
- Seoul National University Hospital, Seoul, Republic of Korea, KOREA, REPUBLIC OF
| | - Y Seo
- Seoul National University Hospital, Seoul, Republic of Korea, KOREA, REPUBLIC OF
| | - S Oh
- Seoul National University Hospital, Seoul, Republic of Korea, KOREA, REPUBLIC OF
| | - K Lee
- Seoul National University Hospital, Seoul, Republic of Korea, KOREA, REPUBLIC OF
| | - S Kim
- Gangneung Asan Hospital, Gangwon-do, KOREA, REPUBLIC OF
| | - Y Lee
- Seoul National University Hospital, Seoul, Republic of Korea, KOREA, REPUBLIC OF
| | - S Kim
- Samsung Medical Center, Seoul, KOREA, REPUBLIC OF
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Ko JS, Seo Y, Chae MK, Jang SY, Yoon JS. Effect of topical loteprednol etabonate with lid hygiene on tear cytokines and meibomian gland dysfunction in prosthetic eye wearers. Eye (Lond) 2017; 32:439-445. [PMID: 29052604 DOI: 10.1038/eye.2017.213] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 08/21/2017] [Indexed: 02/04/2023] Open
Abstract
PurposeTo assess tear cytokine levels and clinical outcomes in meibomian gland dysfunction (MGD) in the blind eye of patients wearing an ocular prosthesis after 2 months of treatment with topical loteprednol etabonate and eyelid scrubs with warm compresses.Patients and methodsThis study included patients with MGD wearing a unilateral ocular prosthesis for more than 1 year. All patients topically received 0.5% loteprednol etabonate and were instructed to scrub their eyelids with warm compresses on the prosthetic eye for 2 months. We evaluated tear cytokine levels using Multiplex Bead Immunoassays, performed biomicroscopic examination of the lid margins and meibomian gland, conducted meibography imaging, and assessed MGD-related ocular symptoms using a questionnaire for the prosthetic eye before and 2 months after treatment.ResultsThirty consecutive patients were included. There were significant reductions in the levels of interleukin (IL)-6, interferon-γ, monocyte chemotactic protein-1, IL-8, tumor necrosis factor-α, and IL-1β (P<0.001 for each cytokine). Moreover, there were improvements in ocular symptoms (P=0.001), lid margin abnormalities (P<0.001), meibomian gland expressibility (P<0.001) and meibography findings (P=0.037).ConclusionTopical loteprednol etabonate in conjunction with eyelid scrubs and warm compresses were effective in treating MGD in prosthetic eye wearers. Furthermore, tear cytokine measurements may serve as an additional approach for evaluating the efficacy of anti-inflammatory treatment for MGD in prosthetic eye wearers.
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Affiliation(s)
- J S Ko
- Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea
| | - Y Seo
- Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea
| | - M K Chae
- Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea
| | - S Y Jang
- Department of Ophthalmology, Soonchunhyang Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - J S Yoon
- Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea
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Liu G, Huang SY, Franc B, Seo Y, Mitra D. Unsupervised Learning in PET Radiomics. IEEE Nucl Sci Symp Conf Rec (1997) 2017; 2017:10.1109/NSSMIC.2017.8532959. [PMID: 30631241 PMCID: PMC6324844 DOI: 10.1109/nssmic.2017.8532959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this study, we investigated large scale radoimics on 116 breast cancer patients. We are particularly interested in unsupervised learning to bicluster patients and features in order to associate such biclusters with the disease characteristics. The results show that radiomics features with wavelet features have a better biclustering ability. And 172 radiomics features have shown a better classification capability.
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Affiliation(s)
- G Liu
- School of Computing, Florida Institute of Technology, Melbourne, FL
| | - S-Y Huang
- Radiology Department, University of California San Francisco
| | - B Franc
- Radiology Department, University of California San Francisco
| | - Y Seo
- Radiology Department, University of California San Francisco
| | - D Mitra
- School of Computing, Florida Institute of Technology, Melbourne, FL
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Tamari K, Seo Y, Takahashi Y, Otani K, Kawashima A, Suzuki O, Isohashi F, Ogawa K. Ro90-7501 Is Identified As a Radiosensitizer By High Throughput Screening. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.2094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Grimm J, Shen C, Redmond K, Sloan L, Hazell S, Chan L, Seo Y, Nikolaidis D, Moore J, Huang E, Quon H, Bettegowda C, Lim M, Kleinberg L. Low Risk of Symptomatic Radionecrosis Following Stereotactic Radiosurgery for Multiple Brain Metastases. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.774] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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