1
|
Mahadevaswamy UR, Mugunthan S, Seviour T, Kjelleberg S, Lim S. Evaluating a polymicrobial biofilm model for structural components by co-culturing Komagataeibacter hansenii produced bacterial cellulose with Pseudomonas aeruginosa PAO1. Biofilm 2024; 7:100176. [PMID: 38322579 PMCID: PMC10845243 DOI: 10.1016/j.bioflm.2024.100176] [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: 07/20/2023] [Revised: 12/21/2023] [Accepted: 01/04/2024] [Indexed: 02/08/2024] Open
Abstract
A polymicrobial biofilm model of Komagataeibacter hansenii and Pseudomonas aeruginosa was developed to understand whether a pre-existing matrix affects the ability of another species to build a biofilm. P. aeruginosa was inoculated onto the preformed K. hansenii biofilm consisting of a cellulose matrix. P. aeruginosa PAO1 colonized and infiltrated the K. hansenii bacterial cellulose biofilm (BC), as indicated by the presence of cells at 19 μm depth in the translucent hydrogel matrix. Bacterial cell density increased along the imaged depth of the biofilm (17-19 μm). On day 5, the average bacterial count across sections was 67 ± 4 % P. aeruginosa PAO1 and 33 ± 6 % K. hansenii. Biophysical characterization of the biofilm indicated that colonization by P. aeruginosa modified the biophysical properties of the BC matrix, which inlcuded increased density, heterogeneity, degradation temperature and thermal stability, and reduced crystallinity, swelling ability and moisture content. This further indicates colonization of the biofilm by P. aeruginosa. While eDNA fibres - a key viscoelastic component of P. aeruginosa biofilm - were present on the surface of the co-cultured biofilm on day 1, their abundance decreased over time, and by day 5, no eDNA was observed, either on the surface or within the matrix. P. aeruginosa-colonized biofilm devoid of eDNA retained its mechanical properties. The observations demonstrate that a pre-existing biofilm scaffold of K. hansenii inhibits P. aeruginosa PAO1 eDNA production and suggest that eDNA production is a response by P. aeruginosa to the viscoelastic properties of its environment.
Collapse
Affiliation(s)
- Usha Rani Mahadevaswamy
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore
| | - Sudarsan Mugunthan
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore
| | - Thomas Seviour
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore
- Centre for Water Technology (WATEC), Department of Biological and Chemical Engineering, Aarhus University, Aarhus, 8000, Denmark
| | - Staffan Kjelleberg
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore
- School of Biological Sciences, Nanyang Technological University, Singapore
- School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, Australia
| | - Sierin Lim
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore
- Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore
| |
Collapse
|
2
|
Herrera MC, Johnson J, Lim S, Morales KH, Wilson JD, Hadland SE, Metzger D, Wood S, Dowshen N. Co-delivery of HIV pre-exposure prophylaxis (PrEP) and HIV testing among publicly insured adolescents and young adults (AYA) receiving medication for opioid use disorder (MOUD). Drug Alcohol Depend 2024; 257:111132. [PMID: 38387256 PMCID: PMC11031309 DOI: 10.1016/j.drugalcdep.2024.111132] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 01/22/2024] [Accepted: 02/12/2024] [Indexed: 02/24/2024]
Abstract
BACKGROUND Low rates of HIV pre-exposure prophylaxis (PrEP) prescribing contribute to the disproportionate burden of HIV in the United States. Among adolescent and young adults (AYA) with opioid use disorder, HIV testing and PrEP co-prescription rates are poorly characterized. METHODS We performed a retrospective analysis involving deidentified data from Philadelphia's Medicaid beneficiaries ages 16-29 years who were prescribed medication for opioid use disorder (MOUD) from 2015 to 2020 and continuously Medicaid-enrolled for ≥6 months prior to that prescription. After identifying the presence of a qualifying diagnosis signifying a PrEP indication, we examined the outcome of appropriate PrEP co-prescriptions and HIV testing using generalized estimating equations (GEE) modeling. RESULTS We identified 795 AYA Medicaid beneficiaries with 1269 qualified treatment episodes. We calculated a PrEP prescribing rate of 29.47 per 1000 person-years among AYA receiving MOUD. The HIV testing rate was 63.47 per 1000 person-years among AYA receiving MOUD. GEE modeling revealed that individuals receiving methadone were more likely (aOR=2.62, 95% CI=1.06-6.49) to receive HIV testing within 6 months after a PrEP-qualifying diagnosis compared to those receiving other MOUD medications. Those who only saw outpatient behavioral health providers were less likely (aOR=0.48, 95% CI=0.24-0.99) to have received an HIV test within 6 months after the PrEP-qualifying diagnosis compared to those receiving inpatient behavioral health services. CONCLUSIONS Co-prescription of PrEP and HIV testing among AYA receiving MOUD was rare in this large urban publicly insured population. Interventions are needed to increase HIV prevention services for this key population of AYA at risk for HIV infection.
Collapse
Affiliation(s)
- M C Herrera
- Division of Adolescent Medicine, Department of General Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA.
| | - J Johnson
- Department of Behavioral Health and Intellectual disAbility Services, Philadelphia, PA, USA
| | - S Lim
- Department of Behavioral Health and Intellectual disAbility Services, Philadelphia, PA, USA
| | - K H Morales
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - J Deanna Wilson
- Department of Family Medicine and Community Health, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - S E Hadland
- Division of Adolescent and Young Adult Medicine, MassGeneral for Children / Harvard Medical School, Boston, MA, USA; Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | - D Metzger
- Department of Psychiatry, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - S Wood
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - N Dowshen
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| |
Collapse
|
3
|
Djordjevic I, Ellis E, Singh J, Ali N, Pena EM, Rajarethinam R, Manikandan L, Goh J, Lim S, Steele T. Color changing bioadhesive barrier for peripherally inserted central catheters. Biomater Sci 2024; 12:1502-1514. [PMID: 38284150 DOI: 10.1039/d3bm01347b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Bacteria migration at catheter insertion sites presents a serious complication (bacteraemia) with high mortality rates. One strategy to mediate bacteraemia is a physical barrier at the skin-catheter interface. Herein a colorimetric biosensor adhesive (CathoGlu) is designed and evaluated for both colorimetric detection of bacterial infection and application as a bacteria barrier. The design intent combines viscous, hydrophobic bioadhesive with an organic pH indicator (bromothymol blue). Visual observation can then distinguish healthy skin at pH = ∼5 from an infected catheter insertion site at pH = ∼8. The liquid-to-biorubber transition of CathoGlu formulation occurs via a brief exposure to UVA penlight, providing an elastic barrier to the skin flora. Leachates from CathoGlu demonstrate no genotoxic and skin sensitization effect, assessed by OECD-recommended in vitro and in chemico assays. The CathoGlu formulation was found non-inferior against clinically approved 2-octyl-cyanoacrylate (Dermabond™), and adhesive tape (Micropore™) within an in vivo porcine model. CathoGlu skin adhesive provides new opportunities to prevent sepsis in challenging clinical situations.
Collapse
Affiliation(s)
- Ivan Djordjevic
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Ave, Block N4.1, Singapore 639798.
| | - Elizabeth Ellis
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Ave, Block N4.1, Singapore 639798.
| | - Juhi Singh
- NTU Institute for Health Technologies, Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, Singapore 637335
- School of Chemistry, Chemical Engineering and Biotechnology, 70 Nanyang Drive, Block N1.3, Nanyang Technological University, Singapore 637457
| | - Naziruddin Ali
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Ave, Block N4.1, Singapore 639798.
| | - Edgar M Pena
- National Large Animal Research Facility, SingHealth Experimental Medicine Centre, Academia 20 College Road, Singapore 169856
| | - Ravisankar Rajarethinam
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore 138673
| | - Lakshmanan Manikandan
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore 138673
| | - Jason Goh
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore 138673
| | - Sierin Lim
- School of Chemistry, Chemical Engineering and Biotechnology, 70 Nanyang Drive, Block N1.3, Nanyang Technological University, Singapore 637457
| | - Terry Steele
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Ave, Block N4.1, Singapore 639798.
| |
Collapse
|
4
|
Watts S, Hänni E, Smith GN, Mahmoudi N, Freire RVM, Lim S, Salentinig S. Human antimicrobial peptide inactivation mechanism of enveloped viruses. J Colloid Interface Sci 2024; 657:971-981. [PMID: 38096780 DOI: 10.1016/j.jcis.2023.11.055] [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: 09/24/2023] [Revised: 11/03/2023] [Accepted: 11/09/2023] [Indexed: 01/02/2024]
Abstract
HYPOTHESIS Enveloped viruses are pivotal in causing various illnesses, including influenza and COVID-19. The antimicrobial peptide LL-37, a critical part of the human innate immune system, exhibits potential as an antiviral agent capable of thwarting these viral threats. Its mode of action involves versatile and non-specific interactions that culminate in dismantling the viral envelope, ultimately rendering the viruses inert. However, the exact mechanism of action is not yet understood. EXPERIMENTS Here, the mechanism of LL-37 triggered changes in the structure and function of an enveloped virus is investigated. The bacteriophage "Phi6" is used as a surrogate for pathogenic enveloped viruses. Small angle X-ray and neutron scattering combined with light scattering techniques demonstrate that LL-37 actively integrates into the virus's lipid envelope. FINDINGS LL-37 addition to Phi6 leads to curvature modification in the lipid bilayer, ultimately separating the envelope from the nucleocapsid. Additional biological assays confirm the loss of virus infectivity in the presence of LL-37, which coincides with the structural transformations. The results provide a fundamental understanding of the structure-activity relationship related to enveloped viruses. The knowledge of peptide-virus interactions can guide the design of future peptide-based antiviral drugs and therapies.
Collapse
Affiliation(s)
- Samuel Watts
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland; School of Chemistry, Chemical Engineering and Biotechnology, 70 Nanyang Drive, Block N1.3, Nanyang Technological University, Singapore 637457, Singapore
| | - Eliane Hänni
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland
| | - Gregory N Smith
- ISIS Neutron and Muon Souce, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - Najet Mahmoudi
- ISIS Neutron and Muon Souce, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - Rafael V M Freire
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland
| | - Sierin Lim
- School of Chemistry, Chemical Engineering and Biotechnology, 70 Nanyang Drive, Block N1.3, Nanyang Technological University, Singapore 637457, Singapore
| | - Stefan Salentinig
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland.
| |
Collapse
|
5
|
Sana B, Ding K, Siau JW, Pasula RR, Chee S, Kharel S, Lena JBH, Goh E, Rajamani L, Lam YM, Lim S, Ghadessy JF. Thermostability enhancement of polyethylene terephthalate degrading PETase using self- and nonself-ligating protein scaffolding approaches. Biotechnol Bioeng 2023; 120:3200-3209. [PMID: 37555384 DOI: 10.1002/bit.28523] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/17/2023] [Accepted: 07/23/2023] [Indexed: 08/10/2023]
Abstract
Polyethylene terephthalate (PET) hydrolase enzymes show promise for enzymatic PET degradation and green recycling of single-use PET vessels representing a major source of global pollution. Their full potential can be unlocked with enzyme engineering to render activities on recalcitrant PET substrates commensurate with cost-effective recycling at scale. Thermostability is a highly desirable property in industrial enzymes, often imparting increased robustness and significantly reducing quantities required. To date, most engineered PET hydrolases show improved thermostability over their parental enzymes. Here, we report engineered thermostable variants of Ideonella sakaiensis PET hydrolase enzyme (IsPETase) developed using two scaffolding strategies. The first employed SpyCatcher-SpyTag technology to covalently cyclize IsPETase, resulting in increased thermostability that was concomitant with reduced turnover of PET substrates compared to native IsPETase. The second approach using a GFP-nanobody fusion protein (vGFP) as a scaffold yielded a construct with a melting temperature of 80°C. This was further increased to 85°C when a thermostable PETase variant (FAST PETase) was scaffolded into vGFP, the highest reported so far for an engineered PET hydrolase derived from IsPETase. Thermostability enhancement using the vGFP scaffold did not compromise activity on PET compared to IsPETase. These contrasting results highlight potential topological and dynamic constraints imposed by scaffold choice as determinants of enzyme activity.
Collapse
Affiliation(s)
- Barindra Sana
- Disease Intervention Technology Laboratory, Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Singapore, Singapore
| | - Ke Ding
- Disease Intervention Technology Laboratory, Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Singapore, Singapore
| | - Jia Wei Siau
- Disease Intervention Technology Laboratory, Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Singapore, Singapore
| | - Rupali Reddy Pasula
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological Univeristy, Singapore, Singapore
| | - Sharon Chee
- Disease Intervention Technology Laboratory, Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Singapore, Singapore
| | - Sharad Kharel
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Jean-Baptise Henri Lena
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Eunice Goh
- Singapore Eye Research Institute, The Academia, Singapore, Singapore
| | | | - Yeng Ming Lam
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Sierin Lim
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological Univeristy, Singapore, Singapore
| | - John F Ghadessy
- Disease Intervention Technology Laboratory, Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Singapore, Singapore
| |
Collapse
|
6
|
Lee MW, Lim S, Jeong W, Kim S, Kim JH, Hwang YS, Sung C. Electron Temperature Measurements Using a Two-Filter Soft X-ray Array in VEST. Sensors (Basel) 2023; 23:8357. [PMID: 37896452 PMCID: PMC10610578 DOI: 10.3390/s23208357] [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] [Received: 09/13/2023] [Revised: 10/01/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023]
Abstract
A multichannel soft X-ray (SXR) array has been developed to measure the electron temperature in the Versatile Experiment Spherical Torus (VEST). To estimate electron temperature using the two-filter method applied to SXR intensity, we designed a pinhole camera that has two photodiode arrays with different metallic filters. We also adopted a filter wheel and tested various filter parameters to find the optimal filter set. Through tests, the combination of aluminum and beryllium was found to be the most suitable for the current experimental conditions in VEST. The filtered SXR signals were acquired with a low-noise preamplifier, exhibiting sufficient signal-to-noise ratios for electron temperature estimation based on the intensity ratio of two signals obtained with different filters. The estimated electron temperature from the developed two-filter SXR array showed reasonably matched levels and consistent trends with Thomson scattering measurements. Error contribution from impurity line emission is also discussed.
Collapse
Affiliation(s)
- M. W. Lee
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea;
| | - S. Lim
- Department of Energy Systems Engineering, Seoul National University, Seoul 08826, Republic of Korea; (S.L.); (W.J.); (S.K.); (J.H.K.); (Y.S.H.)
| | - W. Jeong
- Department of Energy Systems Engineering, Seoul National University, Seoul 08826, Republic of Korea; (S.L.); (W.J.); (S.K.); (J.H.K.); (Y.S.H.)
| | - S. Kim
- Department of Energy Systems Engineering, Seoul National University, Seoul 08826, Republic of Korea; (S.L.); (W.J.); (S.K.); (J.H.K.); (Y.S.H.)
| | - J. H. Kim
- Department of Energy Systems Engineering, Seoul National University, Seoul 08826, Republic of Korea; (S.L.); (W.J.); (S.K.); (J.H.K.); (Y.S.H.)
| | - Y. S. Hwang
- Department of Energy Systems Engineering, Seoul National University, Seoul 08826, Republic of Korea; (S.L.); (W.J.); (S.K.); (J.H.K.); (Y.S.H.)
| | - C. Sung
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea;
| |
Collapse
|
7
|
Sabol R, Prionas ND, Calvin C, Pelayo L, Randolph H, Lim S, Devincent C, Ohliger M, Villanueva-Meyer J, Scholey J, Singer L. Impact of Workflow and Educational Interventions on MR Safety in Radiation Oncology. Int J Radiat Oncol Biol Phys 2023; 117:e432-e433. [PMID: 37785410 DOI: 10.1016/j.ijrobp.2023.06.1599] [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] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Magnetic resonance imaging (MRI) is becoming increasingly integrated into radiation oncology (RO) departments with the use of MRI-Linacs and MRI simulation. Due to the number of implants in patients with cancer, adoption of comprehensive patient screening and MR safety workflows in RO is critical. Identifying MR unsafe implants only at the time of MRI simulation leads to same-day cancellations, potentially delaying treatment, and can risk MR safety events (SEs). This quality improvement study evaluated the impact of workflow and educational interventions on MR safety in RO at a single institution. MATERIALS/METHODS In an effort to decrease same-day cancellations and improve safety surrounding use of a 3 Tesla MRI simulator at an academic center, three plan-see-do-act (PDSA) cycles were implemented from 4/18/22 - 1/19/23. MR safety oversight for the simulator was provided by a multidisciplinary team, with input from both radiology and RO. PDSA cycle 1 implemented a two-screen functional workflow, adapted from radiology at the same institution. The first screen is completed by the practice coordinator (PC) at the time of scheduling to triage high-risk patients into a work queue (WQ) for further evaluation by the MR safety team. The second screen is performed by the MR technologist (MRT) at the point of care. PDSA cycle 2 involved education for PCs. PDSA cycle 3 was a second PC educational intervention including a visual aide to assist with WQ use. Efficacy was determined by the number of same-day cancellations, patients in the WQ (a measure of the number of patients identified at the initial screen as having an implant), and SEs in each PDSA cycle. RESULTS PDSA cycle 1 spanned 56 workdays during which 91 MR simulations were scheduled with 6 cancellations (6.5%). PDSA cycle 2 spanned 84 days during which 173 MR simulations were scheduled with 18 cancellations (10.4%). PDSA cycle 3 spanned 39 workdays and had 94 MR simulations, with 7 cancellations (7.4%). The cancellation rate during each PDSA cycle was 0.11, 0.21, and 0.17 cancellations/day, respectively. The number of patients in the WQ during each PDSA cycle, representing successfully screened high-risk patients, was 0, 0, and 3, respectively. There were no SEs during the study. CONCLUSION In this study, an MR safety workflow from radiology was successfully implemented in RO. There were no SEs during the study, but the number of patients successfully screened as high-risk and placed in the WQ increased after repeat PC education. Further increases in WQ use would decrease the demand for implant assessment at point of care, which could decrease burden on the MRT, same day cancellations, and potentially SEs. This will be especially important if case load increases. Future work could expand educational efforts to additional staff.
Collapse
Affiliation(s)
- R Sabol
- UCSF Department of Radiation Oncology, San Francisco, CA
| | | | - C Calvin
- University of California, San Francisco, San Francisco, CA
| | - L Pelayo
- University of California, San Francisco, San Francisco, CA
| | - H Randolph
- Department of Radiation Oncology, University of California San Francisco (UCSF), San Francisco, CA
| | - S Lim
- Deparment of Radiation Oncology, San Francisco, CA
| | - C Devincent
- Department of Radiology, University of California San Francisco (UCSF), San Francisco, CA
| | - M Ohliger
- Department of Radiology, University of California San Francisco (UCSF), San Francisco, CA
| | - J Villanueva-Meyer
- Department of Radiology, University of California San Francisco (UCSF), San Francisco, CA
| | - J Scholey
- University of California, San Francisco, San Francisco, CA
| | - L Singer
- Department of Radiation Oncology, University of California San Francisco, San Francisco, CA
| |
Collapse
|
8
|
Poloni C, Sze A, Wang X, Lim S, Steiner T. A36 INVESTIGATING TYPE 1 REGULATORY T CELLS AS A THERAPY FOR INFLAMMATORY BOWEL DISEASE USING A MOUSE MODEL OF ACUTE INTESTINAL EPITHELIAL DAMAGE. J Can Assoc Gastroenterol 2023. [PMCID: PMC9991133 DOI: 10.1093/jcag/gwac036.036] [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: 03/09/2023] Open
Abstract
Background Inflammatory bowel disease (IBD) affects an estimated 270,000 people in Canada and is rapidly increasing in prevalence. All patients have relapsing disease, and a subset of individuals do not respond to current treatments. Further, there are no approved treatment options in Canada that reverse IBD-induced intestinal fibrosis. We have previously shown type 1 regulatory cells (Tr1s) are capable of suppressing inflammatory macrophages, promote barrier function of human intestinal epithelial cells, and induce differentiation of mucin-producing goblet cells. We hypothesize that Tr1 cells can prevent inflammatory damage and fibrosis in an mouse model of acute gut damage. Purpose We hypothesize that Tr1 cells can prevent inflammatory damage and fibrosis in an mouse model of gut damage. Here we evalute the therapeutic potential of Tr1 cells in an model of acute intestinal epithelial damage. Method Tr1 cells were isolated and expanded from CD4+ CD44high FOXP3- cells. Their phenotype was characterized by flow cytometry and cytokine secretion was measured via ELISA. WT B6 mice were given 2% DSS in H2O for 7 days, followed by H2O alone for 7 days. Prior to DSS treatment, mice were sub-lethally irradiated to facilitate engraftment, and given I.P. injections of PBS or 0.5 – 2 x 106 Tr1 cells. Mice weights and health scores were recorded daily. At the endpoint, blood, spleen, and mesenteric lymph nodes were analyzed for Tr1 cell engraftment (or lack thereof) for each mouse. Complete white blood counts were performed for each mouse. Additionally, proximal, medial, and distal portions of the ileum were processed for histologic scoring. Result(s) Tr1 cells isolated from CD4+ CD44high FOXP3- cells produce high levels of IL-10 following stimulation (>35,000 pg/ml/1 x 105 cells). Additionally, these cells express high levels of Tr1 markers CD49b and Lag-3. Optimization experiments indicated no significant differences between mice irradiated and given DSS and mice only given DSS (no irradiation). Our results suggest no significant differences in inflammatory cell infiltrate scores between control and Tr1 treated mice. However, gut architecture scores appeared to improve with increasing Tr1 doses. Further, weight change improved with Tr1 treatment, as compared to PBS controls. Interestingly, Tr1 treatment appeared to decrease total eosinophil and neutrophil counts from peripheral blood. Conclusion(s) Our initial findings indicate Tr1 adoptive transfer prior to acute damage via DSS improves gut damage and weight loss. Please acknowledge all funding agencies by checking the applicable boxes below CIHR Disclosure of Interest None Declared
Collapse
Affiliation(s)
- C Poloni
- Microbiology & Immunology, University of British Columbia
| | - A Sze
- BC Children's Hospital Research Institute, Vanccouver
| | - X Wang
- BC Children's Hospital Research Institute, Vanccouver
| | - S Lim
- BC Children's Hospital Research Institute, Vanccouver
| | - T Steiner
- BC Children's Hospital Research Institute, Vancouver, Canada
| |
Collapse
|
9
|
Lim S, Meredith S, Agnew S, Clift E, Ibrahim K, Roberts HC. 1323 VOLUNTEER-LED ONLINE GROUP EXERCISE FOR OLDER ADULTS: A FEASIBILITY AND ACCEPTABILITY STUDY. Age Ageing 2023. [DOI: 10.1093/ageing/afac322.047] [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] [Indexed: 01/18/2023] Open
Abstract
Abstract
Introduction
The health benefits of physical activity for older people are well recognised and include reduction in falls, improvement in frailty status and physical function. Nonetheless, physical inactivity remains a significant problem among older adults. This study aimed to determine the feasibility and acceptability of implementing online volunteer-led group exercise for community-dwelling older adults.
Methods
This pre-post mixed methods study was conducted among older adults attending community social clubs. Eligible participants were aged ≥ 65 years, able to walk independently, and able to provide written consent. The intervention consisted of a once weekly volunteer-led online group chair-based exercise. The primary outcomes were the feasibility and acceptability of the intervention. Secondary outcomes included physical activity levels measured using the Community Health Model Activities Program for Seniors (CHAMPS) questionnaire, functional status (Barthel Index), and health-related quality of life (EQ-5D-5L). Outcomes were measured at baseline and at 6 months. Trials registration: NCT04672200.
Results
Nineteen volunteers were recruited, 15 completed training and 9 were retained (mean age 68 years, 7 female). Thirty participants (mean age 77 years, 27 female) received the intervention and attended 54% (IQR 37-67) of exercise sessions. One minor adverse event was reported. Participants had no significant changes in secondary outcome measures, with a trend towards improvement in physical activity levels. The intervention was acceptable to volunteers, participants, and staff. The seated exercises were perceived as safe, manageable and enjoyable. Volunteers were relatable role models providing positive vicarious experiences that improved participants confidence to exercise within a friendly, non-judgmental environment. Technological issues, or reluctance to learn how to use technology were barriers to the intervention. The social interactions and sense of belonging motivated participation.
Conclusions
Trained volunteers can safely deliver online group exercise for community-dwelling older adults and the intervention was feasible and acceptable to older adults, volunteers and club staff.
Collapse
Affiliation(s)
- S Lim
- University Hospital Southampton NHS Foundation Trust
- University of Southampton NIHR ARC Wessex and Academic Geriatric Medicine,
| | - S Meredith
- University of Southampton NIHR ARC Wessex and Academic Geriatric Medicine,
| | | | - E Clift
- Southern Health NHS Foundation Trust
| | - K Ibrahim
- University of Southampton NIHR ARC Wessex and Academic Geriatric Medicine,
| | - H C Roberts
- University of Southampton NIHR ARC Wessex and Academic Geriatric Medicine,
| |
Collapse
|
10
|
Sarker M, Watts S, Salentinig S, Lim S. Protein Cage-Stabilized Emulsions: Formulation and Characterization. Methods Mol Biol 2023; 2671:219-239. [PMID: 37308648 DOI: 10.1007/978-1-0716-3222-2_13] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The formulation of Pickering emulsions using protein cages is gaining interest for applications in molecular delivery. Despite the growing interest, methods to investigate the at the liquid-liquid interface are limited. This chapter describes standard methods to formulate and protocols to characterize protein cage-stabilized emulsions. The characterization methods are dynamic light scattering (DLS), intrinsic fluorescence spectroscopy (TF), circular dichroism (CD), and small angle X-ray scattering (SAXS). Combining these methods allows understanding of the protein cage nanostructure at the oil/water interface.
Collapse
Affiliation(s)
- Mridul Sarker
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore
| | - Samuel Watts
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore
- Department of Chemistry, University of Fribourg, Fribourg, Switzerland
| | - Stefan Salentinig
- Department of Chemistry, University of Fribourg, Fribourg, Switzerland.
| | - Sierin Lim
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore.
| |
Collapse
|
11
|
Kumar A, Sharma B, Lim S. Protein Cage Relaxivity Measurement for Magnetic Resonance Imaging Contrast Agents. Methods Mol Biol 2023; 2671:349-360. [PMID: 37308655 DOI: 10.1007/978-1-0716-3222-2_20] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Contrast agents are employed to enhance the differentiation of diseased cells or lesions from normal tissues in magnetic resonance imaging (MRI). Protein cages have been explored as templates to synthesize superparamagnetic MRI contrast agents for decades. The biological origin imparts natural precision in forming confined nano-sized reaction vessels. With natural capacity to bind divalent metal ions, ferritin protein cages have been used for the synthesis of nanoparticles containing MRI contrast agents inside their core. Furthermore, ferritin is known to bind transferrin receptor 1 (TfR1) which is overexpressed on specific cancer cell types and could be used for targeted cellular imaging. In addition to iron, other metal ions such as manganese and gadolinium have been encapsulated within the core of ferritin cages. To compare the magnetic properties of ferritin loaded with contrast agents, a protocol for calculating the contrast enhancement power of protein nanocage is required. The contrast enhancement power is demonstrated as relaxivity and can be measured using MRI and solution nuclear magnetic resonance (NMR) methods. In this chapter, we present methods for measuring and calculating the relaxivity of ferritin nanocages loaded with paramagnetic ions in solution (in tube) with NMR and MRI.
Collapse
Affiliation(s)
- Ambrish Kumar
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA, USA
| | - Bhargy Sharma
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Sierin Lim
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore.
| |
Collapse
|
12
|
Makama M, Brown WJ, Lim S, Skouteris H, Harrison CL, Joham AE, Mishra GD, Teede H, Moran LJ. Levels of physical activity and sitting time in women with infants, toddlers and preschoolers: a population-based cross-sectional study. Public Health 2023; 214:1-9. [PMID: 36417813 DOI: 10.1016/j.puhe.2022.10.016] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/29/2022] [Accepted: 10/14/2022] [Indexed: 11/21/2022]
Abstract
OBJECTIVES Insufficient physical activity (PA) and prolonged sitting time (ST) increase the risk of chronic disease and mortality. Caring for young children can potentially impact maternal PA and sedentary behaviours. The aims of this study were to explore the levels of PA and ST in women with young children (infants, toddlers and preschoolers) and sociodemographic and behavioural factors associated with these. STUDY DESIGN This was a population-based cross-sectional study. METHODS Survey 5 data collected in 2009 (n = 4290) of the 1973-1978 birth cohort of the Australian Longitudinal Study on Women's Health were used. Multiple linear and logistic regression models were used to examine associations. RESULTS In adjusted models, compared with women with preschoolers, women whose youngest child was an infant aged 0-6 months, aged >6-12 months or toddler had lower PA (-321.3 MET.min/week [95% confidence interval (CI) -416.2, -226.4], -147.9 MET.min/week [95% CI -237.6, -58.1] and -106.4 MET.min/week [95% CI -172.3, -40.5]). ST was higher in women whose youngest child was an infant aged 0-6 months (0.48 h/day; 95% CI 0.19, 0.77) but lower with infants aged >6-12 months (-0.33 h/day; 95% CI -0.60, -0.05) and toddlers (-0.40 h/day; 95% CI -0.60, -0.20) than in those with preschoolers. The findings were similar in the logistic model. Sociodemographic and behavioural factors such as occupation and marital status also influenced PA and ST. CONCLUSIONS Women with infants and toddlers have lower PA than women with preschoolers. Women are more likely to sit more in the first 6 months after childbirth. These findings can inform resources and intervention development to improve activity levels in women with young children through consideration of the age of the youngest child, sociodemographic and behavioural factors.
Collapse
Affiliation(s)
- M Makama
- Monash Centre for Health Research and Implementation, Monash University, Clayton, Victoria, Australia
| | - W J Brown
- School of Human Movement and Nutrition Sciences, University of Queensland, St Lucia, Queensland, Australia; Faculty of Health Science and Medicine, Bond University, Gold Coast, Australia
| | - S Lim
- Health Systems and Equity, Eastern Health Clinical School, Monash University, Box Hill, Victoria, Australia
| | - H Skouteris
- Health and Social Care Unit, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia; Warwick Business School, Warwick University, Coventry, United Kingdom
| | - C L Harrison
- Monash Centre for Health Research and Implementation, Monash University, Clayton, Victoria, Australia; Department of Endocrinology and Diabetes, Monash Health, Clayton, Victoria, Australia
| | - A E Joham
- Monash Centre for Health Research and Implementation, Monash University, Clayton, Victoria, Australia; Department of Endocrinology and Diabetes, Monash Health, Clayton, Victoria, Australia
| | - G D Mishra
- Centre for Longitudinal and Life Course Research, University of Queensland, Brisbane, Queensland, Australia
| | - H Teede
- Monash Centre for Health Research and Implementation, Monash University, Clayton, Victoria, Australia; Warwick Business School, Warwick University, Coventry, United Kingdom; Department of Endocrinology and Diabetes, Monash Health, Clayton, Victoria, Australia
| | - L J Moran
- Monash Centre for Health Research and Implementation, Monash University, Clayton, Victoria, Australia.
| |
Collapse
|
13
|
Choy S, Paolino A, Kim B, Lim S, Seo J, Tan S, Tan W, Corbett M, Barker J, Lynch M, Smith C, Mahil S. 100 Deep learning image analyses in dermatology, beyond skin lesions: a systematic review. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.110] [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: 11/19/2022]
|
14
|
Toh K, Zhao X, Kim J, Stratton G, Lin HW, Lee D, Yoon S, Fang YF, Chang KC, Stirling R, Zalcberg J, Jung H, Yu H, Lim S, Lim S, Chou KP, J.A. kim, Patel D, Kleinman N. 349P EXPLORE-LC: A multi-site real-world evidence research platform for non-small cell lung cancer in Asia-Pacific. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.10.387] [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: 12/05/2022] Open
|
15
|
Singh J, Steele TWJ, Lim S. Bacterial cellulose adhesive patches designed for soft mucosal interfaces. Biomater Adv 2022; 144:213174. [PMID: 36428212 DOI: 10.1016/j.bioadv.2022.213174] [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] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 10/12/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022]
Abstract
The wet environment in the oral cavity is challenging for topical disease management approaches. The compromised material properties leading to weak adhesion and short retention (<8 h) in such environment result in frequent reapplication of the therapeutics. Composites of bacterial cellulose (BC) and carbene-based bioadhesives attempt to address these shortcomings. Previous designs comprised of aqueous formulations. The current design, for the first time, presents dry, shelf-stable cellulose patches for convenient ready-to-use application. The dry patches simultaneously remove tissue surface hydration while retaining carbene-based photocuring and offers on-demand adhesion. The dry patch prototypes are optimized by controlling BC/adhesive mole ratios and dehydration technique. The adhesion strength is higher than commercial denture adhesives on soft mucosal tissues. The structural integrity is maintained for a minimum of 7 days in aqueous environment. The patches act as selective nanoporous barrier against bacteria while allowing permeation of proteins. The results support the application of BC-based adhesive patches as a flexible platform for wound dressings, drug depots, or combination thereof.
Collapse
Affiliation(s)
- Juhi Singh
- NTU Institute for Health Technologies, Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, Singapore 637335, Singapore; School of Chemical and Biomedical Engineering, 70 Nanyang Drive, Block N1.3, Nanyang Technological University, Singapore 637457, Singapore.
| | - Terry W J Steele
- School of Materials Science and Engineering (MSE), Division of Materials Technology, Nanyang Technological University (NTU), Singapore 639798, Singapore.
| | - Sierin Lim
- School of Chemical and Biomedical Engineering, 70 Nanyang Drive, Block N1.3, Nanyang Technological University, Singapore 637457, Singapore.
| |
Collapse
|
16
|
Gupta N, Karuppannan SK, Pasula RR, Vilan A, Martin J, Xu W, May EM, Pike AR, Astier HPA, Salim T, Lim S, Nijhuis CA. Temperature-Dependent Coherent Tunneling across Graphene-Ferritin Biomolecular Junctions. ACS Appl Mater Interfaces 2022; 14:44665-44675. [PMID: 36148983 PMCID: PMC9542697 DOI: 10.1021/acsami.2c11263] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 09/08/2022] [Indexed: 06/16/2023]
Abstract
Understanding the mechanisms of charge transport (CT) across biomolecules in solid-state devices is imperative to realize biomolecular electronic devices in a predictive manner. Although it is well-accepted that biomolecule-electrode interactions play an essential role, it is often overlooked. This paper reveals the prominent role of graphene interfaces with Fe-storing proteins in the net CT across their tunnel junctions. Here, ferritin (AfFtn-AA) is adsorbed on the graphene by noncovalent amine-graphene interactions confirmed with Raman spectroscopy. In contrast to junctions with metal electrodes, graphene has a vanishing density of states toward its intrinsic Fermi level ("Dirac point"), which increases away from the Fermi level. Therefore, the amount of charge carriers is highly sensitive to temperature and electrostatic charging (induced doping), as deduced from a detailed analysis of CT as a function of temperature and iron loading. Remarkably, the temperature dependence can be fully explained within the coherent tunneling regime due to excitation of hot carriers. Graphene is not only demonstrated as an alternative platform to study CT across biomolecular tunnel junctions, but it also opens rich possibilities in employing interface electrostatics in tuning CT behavior.
Collapse
Affiliation(s)
- Nipun
Kumar Gupta
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- Centre
for Advanced 2D Materials, National University
of Singapore, 6 Science Drive 2, Singapore 117546, Singapore
| | - Senthil Kumar Karuppannan
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Rupali Reddy Pasula
- School
of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457, Singapore
| | - Ayelet Vilan
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot 76100, Israel
| | - Jens Martin
- Centre
for Advanced 2D Materials, National University
of Singapore, 6 Science Drive 2, Singapore 117546, Singapore
| | - Wentao Xu
- Centre
for Advanced 2D Materials, National University
of Singapore, 6 Science Drive 2, Singapore 117546, Singapore
| | - Esther Maria May
- Chemistry-School
of Natural and Environmental Sciences, Newcastle
University, Newcastle
upon Tyne NE1 7RU, U.K.
| | - Andrew R. Pike
- School
of
Materials Science and Engineering, Nanyang
Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Hippolyte P. A.
G. Astier
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Teddy Salim
- School
of
Materials Science and Engineering, Nanyang
Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Sierin Lim
- School
of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457, Singapore
| | - Christian A. Nijhuis
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- Centre
for Advanced 2D Materials, National University
of Singapore, 6 Science Drive 2, Singapore 117546, Singapore
- Hybrid
Materials for Opto-Electronics Group, Department of Molecules and
Materials, MESA+ Institute for Nanotechnology and Centre for Brain-Inspired
Nano Systems, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| |
Collapse
|
17
|
Kim JH, Franchin L, Hong SJ, Cha JJ, Lim S, Joo HJ, Park JH, Yu CW, Ahn TH, Lim DS, Dascenzo F. The long-term cardiac events after coronary bifurcation stenting with second-generation drug-eluting stents in elderly patients are comparable to those of younger patients. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1256] [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: 11/14/2022] Open
Abstract
Abstract
Background
Elderly patients undergoing percutaneous coronary intervention (PCI) generally have a high risk of adverse clinical outcomes. We investigated the long-term clinical impact of PCI on coronary bifurcation disease in elderly patients in Korea and Italy.
Methods
From the BIFURCAT (comBined Insights from the Unified RAIN and COBIS bifurcAtion regisTries) data, we evaluated 5,537 patients who underwent PCI for coronary bifurcation disease. The primary outcome was major adverse cardiac events (MACEs), defined as the composite of target vessel myocardial infarction, target lesion revascularisation, and stent thrombosis. Kaplan–Meier estimates and Cox proportional hazard models were used to compare elderly patients (aged ≥75 years) and younger patients (aged <75 years).
Results
A total of 1,415 patients (26%) were aged ≥75 years. Elderly patients were more frequently female, had higher rates of hypertension and chronic kidney disease (CKD), and presented more frequently with left main (LM) disease. After a median follow-up of 2.1 years, MACEs were comparable between elderly and younger patients. In multivariable analysis, old age was not an independent predictor of MACEs (p=0.977). In elderly patients, CKD and LM disease were independent predictors of MACEs, whereas in younger patients, hypertension, diabetes, CKD, reduced left ventricular ejection fraction, LM disease, and two-stent strategy usage were independent predictors.
Conclusions
Elderly patients who underwent coronary bifurcation PCI with second-generation drug-eluting stents demonstrated similar clinical outcomes to those of younger patients. Both CKD and LM disease were independent predictors of MACEs, regardless of age after coronary bifurcation PCI.
Funding Acknowledgement
Type of funding sources: None.
Collapse
Affiliation(s)
- J H Kim
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - L Franchin
- University of Turin, Cardiovascular and Thoracic , Turin , Italy
| | - S J Hong
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - J J Cha
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - S Lim
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - H J Joo
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - J H Park
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - C W Yu
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - T H Ahn
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - D S Lim
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - F Dascenzo
- University of Turin, Cardiovascular and Thoracic , Turin , Italy
| |
Collapse
|
18
|
Lim S, Yu CW, Kim JH, Cha JJ, Kook HD, Joo HJ, Park JH, Choi CU, Hong SJ, Lim DS. The differential effects of antihypertensive drugs on central blood pressure: nebivolol versus telmisartan (ATD-CBP). Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2207] [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
Central blood pressure and central pulse pressure have a better correlation with the risk of cardiovascular disease compared to those of peripheral measurement. In a previous study, a second-generation beta-blocker showed poor CBP-lowering effects. However, the effect on CBP by third-generation beta-blockers is not fully elucidated. Thus, this randomised study investigated whether nebivolol-based hypertension treatment may confer advantages over telmisartan, an angiotensin II receptor-blocker, in reducing CBP.
Methods
This was a prospective, randomised, multicentre, open-label, controlled trial that evaluated 98 hypertensive patients. Patients received either nebivolol- (N=49) or telmisartan-based (N=49) treatment for hypertension for 12 weeks with a target BP of ≤140/80. The primary outcome was the difference in change from baseline central systolic BP (cSBP) after 12 weeks.
Results
There were no significant differences between the two groups in baseline central and peripheral SBP. The mean change in cSBP from baseline (ΔcSBP) was −17.2±3 mmHg for nebivolol group (P<0.001) and −29.9±3 mmHg for telmisartan group (P<0.001). The difference in ΔcSBP between the two groups was significant (12.7mmHg, 95% confidence interval [CI], 4.13 to 21.2; P=0.004). Peripheral SBP (pSBP) decreased less in nebivolol group compared to telmisartan group (−18.0±3 in nebivolol group vs. −26.3±3 in telmisartan group, P=0.032). After adjusting for reduction in pSBP, reduction in cSBP was higher in telmisartan group compared to nebivolol group, as shown by the ratio of changes in cSBP and pSBP (ΔcSBP/ΔpSBP; 0.67 for nebivolol group vs. 1.11 for telmisartan group, P=0.080), albeit without statistical significance.
Conclusions
Nebivolol-based hypertension treatment may have less potent CBP-lowering effects compared to telmisartan. However, larger-scale studies are warranted to further elaborate our findings.
Funding Acknowledgement
Type of funding sources: None.
Collapse
Affiliation(s)
- S Lim
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - C W Yu
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - J H Kim
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - J J Cha
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - H D Kook
- Hanyang university medical center , Seoul , Korea (Republic of)
| | - H J Joo
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - J H Park
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - C U Choi
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - S J Hong
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - D S Lim
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| |
Collapse
|
19
|
Bae SA, Cha JJ, Kim SW, Lim S, Kim JH, Joo HJ, Park JH, Park SM, Hong SJ, Yu CW, Lim DS, Jeong MH, Ahn TH. Effect of an early invasive strategy based on time of symptom onset in patients with non-ST elevation myocardial infarction. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1200] [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
A limitation of the current guidelines of the timing of invasive coronary angiography (ICA) for patients with non-ST-segment elevation (NSTE) acute coronary syndrome is based on randomization time. So far, no study has reported the clinical outcomes of invasive strategy timing based on the time of symptom onset. Herein, we aimed to investigate the effect of invasive strategy timing from the time of symptom onset on the 3-year clinical outcomes of patients with NSTE myocardial infarction (MI).
Methods and results
Among 13,104 patients from the Korea Acute Myocardial Infarction Registry-National Institutes of Health, we evaluated 5,856 patients with NSTEMI. The patients were categorized according to symptom-to-catheter (StC) time (<48 h and ≥48 h). The primary outcome was 3-year all-cause mortality, and the secondary outcome was a 3-year composite of all-cause mortality, recurrent MI, and hospitalization for heart failure. Overall, 3,919 (66.9%) patients were classified into the StC time <48 h group. This group had lower all-cause mortality than the StC time ≥48 h group (7.3% vs. 13.4%, p<0.001). The continuous association of StC time and risk of primary and secondary endpoints showed shorter StC time (reference: 48 h), and lower adjusted hazard ratio reduction was observed. In multivariable analysis, independent predictors of delayed ICA were older age, non-specific symptoms, no use of emergency medical services, no ST-segment deviation, chronic kidney disease, and Global Registry of Acute Coronary Events score >140.
Conclusion
Early invasive strategy based on the StC time improves all-cause mortality in patients with NSTEMI.
Funding Acknowledgement
Type of funding sources: None.
Collapse
Affiliation(s)
- S A Bae
- Yongin Severance Hospital, Yonsei University College of Medicine , Yongin , Korea (Republic of)
| | - J J Cha
- Korea University Anam Hospital, Department of Cardiology , Seoul , Korea (Republic of)
| | - S W Kim
- Chung-Ang University Gwangmyeong Hospital, Department of Cardiology , Gwangmyeong , Korea (Republic of)
| | - S Lim
- Korea University Anam Hospital, Department of Cardiology , Seoul , Korea (Republic of)
| | - J H Kim
- Korea University Anam Hospital, Department of Cardiology , Seoul , Korea (Republic of)
| | - H J Joo
- Korea University Anam Hospital, Department of Cardiology , Seoul , Korea (Republic of)
| | - J H Park
- Korea University Anam Hospital, Department of Cardiology , Seoul , Korea (Republic of)
| | - S M Park
- Korea University Anam Hospital, Department of Cardiology , Seoul , Korea (Republic of)
| | - S J Hong
- Korea University Anam Hospital, Department of Cardiology , Seoul , Korea (Republic of)
| | - C W Yu
- Korea University Anam Hospital, Department of Cardiology , Seoul , Korea (Republic of)
| | - D S Lim
- Korea University Anam Hospital, Department of Cardiology , Seoul , Korea (Republic of)
| | - M H Jeong
- Chonnam National University Medical School, Department of Cardiovascular Medicine , Gwangju , Korea (Republic of)
| | - T H Ahn
- Chung-Ang University Gwangmyeong Hospital, Department of Cardiology , Gwangmyeong , Korea (Republic of)
| |
Collapse
|
20
|
Gupta NK, Okamoto N, Karuppannan SK, Pasula RR, Ziyu Z, Qi DC, Lim S, Nakamura M, Nijhuis CA. The Role of Structural Order in the Mechanism of Charge Transport across Tunnel Junctions with Various Iron-Storing Proteins. Small 2022; 18:e2203338. [PMID: 36103613 DOI: 10.1002/smll.202203338] [Citation(s) in RCA: 2] [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: 05/30/2022] [Revised: 07/19/2022] [Indexed: 06/15/2023]
Abstract
In biomolecular electronics, the role of structural order in charge transport (CT) is poorly understood. It has been reported that the metal oxide cores of protein cages (e.g., iron oxide and ferrihydrite nanoparticles (NPs) present in ferritin and E2-LFtn, which is E2 protein engineered with an iron-binding sequence) play an important role in the mechanism of CT. At the same time, the NP core also plays a major role in the structural integrity of the proteins. This paper describes the role of structural order in CT across tunnel junctions by comparing three iron-storing proteins. They are (1) DNA binding protein from starved cells (Dps, diameter (∅) = 9 nm); (2) engineered archaeal ferritin (AfFtn-AA, ∅ = 12 nm); and (3) engineered E2 of pyruvate dehydrogenase enzyme complex (E2-LFtn, ∅ = 25 nm). Both holo-Dps and apo-Dps proteins undergo CT by coherent tunneling because their globular architecture and relative structural stability provide a coherent conduction pathway. In contrast, apo-AfFtn-AA forms a disordered structure across which charges have to tunnel incoherently, but holo-AfFtn-AA retains its globular structure and supports coherent tunneling. The large E2-LFtn always forms disordered structures across which charges incoherently tunnel regardless of the presence of the NP core. These findings highlight the importance of structural order in the mechanism of CT across biomolecular tunnel junctions.
Collapse
Affiliation(s)
- Nipun Kumar Gupta
- Department of Chemistry, National University of Singapore, 3 Science Drive, Singapore, 117543, Singapore
- Centre for Advanced 2D Materials, National University of Singapore, 6 Science Drive 2, Singapore, 117546, Singapore
| | - Naofumi Okamoto
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara, 630-0192, Japan
| | - Senthil Kumar Karuppannan
- Department of Chemistry, National University of Singapore, 3 Science Drive, Singapore, 117543, Singapore
- National Quantum Fabless Foundry (NQFF), Institute of Materials Research and Engineering, 2 Fusionopolis Way, Innovis Building, Singapore, 138634, Singapore
| | - Rupali Reddy Pasula
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 70 Nanyang Drive, Singapore, 637457, Singapore
| | - Zhang Ziyu
- Department of Chemistry, National University of Singapore, 3 Science Drive, Singapore, 117543, Singapore
| | - Dong-Chen Qi
- Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology, Brisbane, Queensland, 4001, Australia
| | - Sierin Lim
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 70 Nanyang Drive, Singapore, 637457, Singapore
- Institute for Digital Molecular Analytics and Science, Nanyang Technological University, 59 Nanyang Drive, Experimental Medicine Building, Singapore, 636921, Singapore
| | - Masakazu Nakamura
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara, 630-0192, Japan
| | - Christian A Nijhuis
- Department of Chemistry, National University of Singapore, 3 Science Drive, Singapore, 117543, Singapore
- Centre for Advanced 2D Materials, National University of Singapore, 6 Science Drive 2, Singapore, 117546, Singapore
- Department of Molecules and Materials, MESA+ Institute for Nanotechnology, and Center for Brain-Inspired Nano Systems (BRAINS), Faculty of Science and Technology, University of Twente, P.O. Box 217, Enschede, 7500 AE, The Netherlands
| |
Collapse
|
21
|
Lim S. Towards Carbon‐Neutral Plastic Bio‐Upcycling. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202255336] [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: 11/10/2022]
Affiliation(s)
- S. Lim
- Nanyang Technological University (NTU) School of Chemical and Biomedical Engineering Block N1.2, B3-13, 62 Nanyang Drive 637459 Singapore Singapore
| |
Collapse
|
22
|
Lee B, Bang Y, Lim S, Kang S, Park C, Kim H, Kim T. 067 Dissecting circulating regulatory T cells in severe Korean psoriasis patients by mass cytometry. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.121] [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: 10/17/2022]
|
23
|
Chen CCJ, Lim S. Examining the effect of COVID-19 pandemic on exercise behavior and perceived academic stress among U.S. college students. J Am Coll Health 2022:1-7. [PMID: 35816754 DOI: 10.1080/07448481.2022.2094202] [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] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 06/05/2022] [Accepted: 06/19/2022] [Indexed: 06/15/2023]
Abstract
Objective: The aim of this study was to capture the impact of COVID-19 on exercise behavior in U.S. college students. Exercise behaviors and perceived academic stress were examined from pre-COVID-19 (January-March 2020) and early-COVID-19 (April-July 2020) to continued-COVID-19 times (August-October 2020). Participants: One hundred and thirty-two participants completed the online questionnaires retrospectively. Methods: Two-way analyses of variance were used to examine exercise behaviors and academic stress perception over time between genders. Results: Participants spent much time in sedentary behavior and an increase in academic stress was evident in learning during the early-COVID-19 period. The time spent in sedentary behavior was reduced, but the stress involving coursework remained during the continued-COVID period. The impact of the COVID pandemic was observed to be universal across sex groups. Conclusions: Universities should consider how to support physical and mental health during lockdown and extended closure due to a pandemic.
Collapse
Affiliation(s)
- C-C Jj Chen
- Department of Kinesiology, Mississippi State University, Mississippi State, Mississippi, USA
| | - S Lim
- Department of Kinesiology, Mississippi State University, Mississippi State, Mississippi, USA
| |
Collapse
|
24
|
Haeusler IL, Daniel O, Isitt C, Watts R, Cantrell L, Feng S, Cochet M, Salloum M, Ikram S, Hayter E, Lim S, Hall T, Athaide S, Cosgrove CA, Tregoning JS, Le Doare K. Group B Streptococcus (GBS) colonisation is dynamic over time, whilst GBS capsular polysaccharides-specific antibody remains stable. Clin Exp Immunol 2022; 209:188-200. [PMID: 35802786 PMCID: PMC9390841 DOI: 10.1093/cei/uxac066] [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: 03/31/2022] [Revised: 06/08/2022] [Accepted: 06/27/2022] [Indexed: 11/20/2022] Open
Abstract
Group B Streptococcus (GBS) is a leading cause of adverse pregnancy outcomes due to invasive infection. This study investigated longitudinal variation in GBS rectovaginal colonization, serum and vaginal GBS capsular polysaccharide (CPS)-specific antibody levels. Non-pregnant women were recruited in the UK and were sampled every 2 weeks over a 12-week period. GBS isolates were taken from recto-vaginal swabs and serotyped by polymerase chain reaction. Serum and vaginal immunoglobulin G (IgG) and nasal immunoglobulin A (IgA) specific to CPS were measured by Luminex, and total IgG/A by ELISA. Seventy women were enrolled, of median age 26. Out of the 66 participants who completed at least three visits: 14/47 (29.8%) women that were GBS negative at screening became positive in follow-up visits and 16/19 (84.2%) women who were GBS positive at screening became negative. There was 50% probability of becoming negative 36 days after the first positive swab. The rate of detectable GBS carriage fluctuated over time, although serum, vaginal, and nasal CPS-specific antibody levels remained constant. Levels of CPS-specific antibodies were higher in the serum of individuals colonized with GBS than in non-colonized, but similar in the vaginal and nasal mucosa. We found correlations between antibody levels in serum and the vaginal and nasal mucosa. Our study demonstrates the feasibility of elution methods to retrieve vaginal and nasal antibodies, and the optimization of immunoassays to measure GBS-CPS-specific antibodies. The difference between the dynamics of colonization and antibody response is interesting and further investigation is required for vaccine development.
Collapse
Affiliation(s)
- I L Haeusler
- St George's University of London, Paediatric Infectious Diseases Research Group, London, United Kingdom
| | - O Daniel
- St George's University of London, Paediatric Infectious Diseases Research Group, London, United Kingdom
| | - C Isitt
- St George's University of London, The Vaccine Institute, London, United Kingdom
| | - R Watts
- St George's University of London, Paediatric Infectious Diseases Research Group, London, United Kingdom
| | - L Cantrell
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford
| | - S Feng
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford
| | - M Cochet
- St George's University of London, Paediatric Infectious Diseases Research Group, London, United Kingdom
| | - M Salloum
- St George's University of London, Paediatric Infectious Diseases Research Group, London, United Kingdom.,UnivLyon, Claude Bernard University Lyon I, France
| | - S Ikram
- St George's University of London, The Vaccine Institute, London, United Kingdom
| | - E Hayter
- St George's University of London, The Vaccine Institute, London, United Kingdom
| | - S Lim
- St George's University of London, Paediatric Infectious Diseases Research Group, London, United Kingdom
| | - T Hall
- St George's University of London, Paediatric Infectious Diseases Research Group, London, United Kingdom
| | - S Athaide
- St George's University of London, The Vaccine Institute, London, United Kingdom
| | - C A Cosgrove
- St George's University of London, The Vaccine Institute, London, United Kingdom
| | - J S Tregoning
- Imperial College London, Department of Infectious Disease, London, United Kingdom
| | - K Le Doare
- St George's University of London, Paediatric Infectious Diseases Research Group, London, United Kingdom.,Makerere University John Hopkins Research Collaboration, Kampala, Uganda.,Pathogen Immunology Group, United Kingdom Health Security Agency, Porton Down, United Kingdom
| |
Collapse
|
25
|
Wang C, Leng S, Tan R, Chai P, Fam J, Teo L, Chin C, Ong C, Baskaran L, Keng F, Low A, Chan M, Wong A, Chua T, Tan S, Lim S, Zhong L. 517 Computed Tomography Coronary Angiography Based Morphological Index Predicts Coronary Ischemia. J Cardiovasc Comput Tomogr 2022. [DOI: 10.1016/j.jcct.2022.06.128] [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: 10/17/2022]
|
26
|
Oo T, Aung Z, Barrera V, Arroyo S, Lim S. 957 THE USE OF IPADS AS PART OF PERSON CENTERED CARE IN A TEACHING HOSPITAL IN SINGAPORE. Age Ageing 2022. [DOI: 10.1093/ageing/afac126.018] [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] [Indexed: 11/14/2022] Open
Abstract
Abstract
The elderly patients are currently the main occupants of acute hospital beds and this trend will likely increase as the world ages. The elderly patients with cognitive issues frequently have behavioural symptoms which may be challenging for the care staff to manage, especially the staff who have not been formally trained in Gerontology. The use of restraints for this group of vulnerable patients should be discouraged as restraints can cause harmful effects.
The use of iPads as a non pharmacological strategy for managing the behavioural symptoms among the elderly in-patients with cognitive issues was effective in reducing agitation, with an improvement in mood and sundown symptoms. The patients were actively and meaningfully engaged with their iPads during therapy.
The nursing staff too, benefited from iPads as a novel therapy for their elderly in-patients with cognitive issues in providing cognitive and social stimulations, which they had no time to provide for. While the patients showed improvement in their behavioural symptoms, the nurses’ stress levels reduced with improved self-reported job satisfaction.
Collapse
Affiliation(s)
- T Oo
- Department of Geriatric Medicine, Changi General Hospital , Singapore
| | - Z Aung
- Department of Geriatric Medicine, Changi General Hospital , Singapore
| | - V Barrera
- Department of Geriatric Medicine, Changi General Hospital , Singapore
| | - S Arroyo
- Department of Geriatric Medicine, Changi General Hospital , Singapore
| | - S Lim
- Department of Geriatric Medicine, Changi General Hospital , Singapore
| |
Collapse
|
27
|
Lim J, Lim S, Kim J. P-116 Discriminating factors for gastric neoplasm among regenerative atypia found in screening upper gastrointestinal endoscopy. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.206] [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] Open
|
28
|
McKenzie J, Kosmider S, Wong R, To Y, Shapiro J, Dunn C, Burge M, Hong W, Caird S, Lim S, Wong H, Lee B, Gibbs P, Wong V. P-187 Epidermal growth factor receptor inhibitors (EGFRi) in patients with left-side, RAS wildtype metastatic colorectal cancer: Clinician use and outcomes for patients. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.277] [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: 11/17/2022] Open
|
29
|
Han A, Kim K, Choi H, Noh H, Cho IJ, Lim S, Lee J. 19P Usefulness of Hounsfield unit on computed tomography, serum neutrophil to lymphocyte ratio, and their combination as prognostic factor in patients with breast cancer. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.03.034] [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: 11/01/2022] Open
|
30
|
Teo K, Cheow Y, Zhang S, Shi J, Lai R, Lim S, Toh W. Exosomes/EVs: MSC-SEVS ALLEVIATE LOCAL AND SYSTEMIC INFLAMMATION TO PROMOTE JOINT REPAIR IN OSTEOARTHRITIS. Cytotherapy 2022. [DOI: 10.1016/s1465-3249(22)00252-3] [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]
|
31
|
Jiang Y, Teo K, Zhang S, Shi J, Lai R, Lim S, Toh W. Exosomes/EVs: MSC EXOSOMES ALLEVIATE OSTEOARTHRITIS THROUGH COMPLEMENT INHIBITION. Cytotherapy 2022. [DOI: 10.1016/s1465-3249(22)00251-1] [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: 11/29/2022]
|
32
|
Frize M, Tsapaki V, Lhotska L, da Silva AMM, Ibrahim F, Bezak E, Stoeva M, Barabino G, Lim S, Kaldoudi E, Tan PH, Marcu LG. Women in Medical Physics and Biomedical Engineering: past, present and future. Health Technol 2022; 12:655-662. [PMID: 35399289 PMCID: PMC8980510 DOI: 10.1007/s12553-022-00658-7] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 02/23/2022] [Accepted: 03/12/2022] [Indexed: 11/25/2022]
Abstract
Women in Medical Physics and Biomedical Engineering (WiMPBME) is a Task Group established in 2014 under the International Union of Physical and Engineering Scientists in Medicine (IUPESM). The group’s main role is to identify, develop, implement, and coordinate various tasks and projects related to women’s needs and roles in medical physics and biomedical engineering around the world. The current paper summarizes the past, present and future goals and activities undertaken or planned by the Task group in order to motivate, nurture and support women in medical physics and biomedical engineering throughout their professional careers. In addition, the article includes the historical pathway followed by various women’s groups and subcommittees from 2004 up to the present day and depicts future aims to further these professions in a gender-balanced manner.
Collapse
Affiliation(s)
- Monique Frize
- Department of Systems and Computer Engineering, Carleton University, K1S 5B6 Ottawa, ON Canada
| | - Virginia Tsapaki
- Medical Physics Department, Konstantopoulio General Hospitals, Athens, Greece
| | - Lenka Lhotska
- Faculty of Biomedical Engineering, Czech Technical University in Prague, Prague 6, Czech Republic
| | | | - Fatimah Ibrahim
- Department of Biomedical Engineering and Centre for Innovation in Medical Engineering, Faculty of Engineering, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - Eva Bezak
- Cancer Research Institute, University of South Australia, 5001 Adelaide, SA Australia
| | - Magdalena Stoeva
- Department of Diagnostic Imaging, Medical University of Plovdiv, Plovdiv, Bulgaria
| | | | - Sierin Lim
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 637457 Singapore, Singapore
| | - Eleni Kaldoudi
- School of Medicine, Democritus University of Thrace, Alexandroupoli, Greece
| | - Peck Ha Tan
- School of Engineering, Ngee Ann Polytechnic, Singapore, Singapore
| | - Loredana G. Marcu
- Cancer Research Institute, University of South Australia, 5001 Adelaide, SA Australia
- Faculty of Informatics and Science, University of Oradea, 1 Universitatii str, 410087 Oradea, Bihor, Romania
| |
Collapse
|
33
|
Yim I, Parker K, Lim S. Pulmonary Artery Wave Intensity Analysis in Pulmonary Hypertension Due to Left Heart Disease. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.327] [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] Open
|
34
|
Yim I, Parker K, Lim S. Reservoir Pressure Analysis in Group 2 Pulmonary Hypertension. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.328] [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: 11/28/2022] Open
|
35
|
Yoon S, Lim S, Jung H, Kim KP, Kim D, Jeong H, Lim S, Kim J, Kim J, Patel D, Zhao X, Horsburgh D, Yu D, Kim J, Kim S, Lee D. 50P Clinical characteristics, treatment patterns and outcomes of EGFR exon 20 insertion and other EGFR mutations in Korean aNSCLC patients. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.02.059] [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: 11/16/2022] Open
|
36
|
Quinn D, Morley-Smith A, Chue C, Phillips N, Lim S. Deployment, Configuration and Complications of Percutaneous Right Ventricular Assist Device - The Birmingham Experience. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1513] [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: 11/28/2022] Open
|
37
|
Lim S, Ranasinghe A, Chue C, Quinn D, Mascaro J. How Does a Protocolized Therapeutic Framework Improve Survival in Cardiogenic Shock Due to End-Stage Heart Failure? J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1602] [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] Open
|
38
|
Pasula RR, Lim S, Ghadessy FJ, Sana B. The influences of substrates' physical properties on enzymatic PET hydrolysis: Implications for PET hydrolase engineering. Engineering Biology 2022; 6:17-22. [PMID: 36968557 PMCID: PMC9995159 DOI: 10.1049/enb2.12018] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 11/25/2021] [Accepted: 11/26/2021] [Indexed: 11/19/2022] Open
Abstract
Plastic pollution in diverse terrestrial and marine environments is a widely recognised and growing problem. Bio-recycling and upcycling of plastic waste is a potential solution to plastic pollution, as these processes convert plastic waste into useful materials. Polyethylene terephthalate (PET) is the most abundant plastic waste, and this material can be degraded by a class of recently discovered bacterial esterase enzymes known as PET hydrolases (PETase). Investigations of the enzymatic hydrolysis of diverse PET molecules have clearly revealed that the biodegradability of various PET substrates depends on both their chemical structure and physical properties, including polymer length, crystallinity, glass transition temperature, surface area, and surface charge. This review summarises the known impacts of crystallinity and other physical properties on enzymatic PET hydrolysis.
Collapse
Affiliation(s)
- Rupali Reddy Pasula
- School of Chemical and Biomedical Engineering Nanyang Technological University Singapore
| | - Sierin Lim
- School of Chemical and Biomedical Engineering Nanyang Technological University Singapore
| | - Farid J. Ghadessy
- Disease Intervention Technology Laboratory Institute of Molecular and Cell Biology Agency for Science Technology and Research (A*STAR) Biopolis Singapore
| | - Barindra Sana
- Disease Intervention Technology Laboratory Institute of Molecular and Cell Biology Agency for Science Technology and Research (A*STAR) Biopolis Singapore
| |
Collapse
|
39
|
Bezak E, Carson-Chahhoud KV, Marcu LG, Stoeva M, Lhotska L, Barabino GA, Ibrahim F, Kaldoudi E, Lim S, Marques da Silva AM, Tan PH, Tsapaki V, Frize M. The Biggest Challenges Resulting from the COVID-19 Pandemic on Gender-Related Work from Home in Biomedical Fields—World-Wide Qualitative Survey Analysis. IJERPH 2022; 19:ijerph19053109. [PMID: 35270801 PMCID: PMC8910706 DOI: 10.3390/ijerph19053109] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 03/01/2022] [Accepted: 03/04/2022] [Indexed: 02/04/2023]
Abstract
(1) Background: This paper aims to present and discuss the most significant challenges encountered by STEM professionals associated with remote working during the COVID-19 lockdowns. (2) Methods: We performed a qualitative analysis of 921 responses from professionals from 76 countries to the open-ended question: “What has been most challenging during the lockdown for you, and/or your family?” (3) Findings: Participants reported challenges within the immediate family to include responsibilities for school, childcare, and children’s wellbeing; and the loss of social interactions with family and friends. Participants reported increased domestic duties, blurred lines between home and work, and long workdays. Finding adequate workspace was a problem, and adaptations were necessary, especially when adults shared the same setting for working and childcare. Connectivity issues and concentration difficulties emerged. While some participants reported employers’ expectations did not change, others revealed concerns about efficiency. Mental health issues were expressed as anxiety and depression symptoms, exhaustion and burnout, and no outlets for stress. Fear of becoming infected with COVID-19 and uncertainties about the future also emerged. Pressure points related to gender, relationship status, and ethnicities were also evaluated. Public policies differed substantially across countries, raising concerns about the adherence to unnecessary restrictions, and similarly, restrictions being not tight enough. Beyond challenges, some benefits emerged, such as increased productivity and less time spent getting ready for work and commuting. Confinement resulted in more quality time and stronger relationships with family. (4) Interpretation: Viewpoints on positive and negative aspects of remote working differed by gender. Females were more affected professionally, socially, and personally than males. Mental stress and the feeling of inadequate work efficiency in women were caused by employers’ expectations and lack of flexibility. Working from home turned out to be challenging, primarily due to a lack of preparedness, limited access to a dedicated home-office, and lack of previous experience in multi-layer/multi-scale environments.
Collapse
Affiliation(s)
- Eva Bezak
- Cancer Research Institute, University of South Australia, Adelaide, SA 5001, Australia; (E.B.); (K.V.C.-C.)
| | - Kristin V. Carson-Chahhoud
- Cancer Research Institute, University of South Australia, Adelaide, SA 5001, Australia; (E.B.); (K.V.C.-C.)
- Australian Centre for Precision Health, University of South Australia, Adelaide, SA 5001, Australia
- School of Medicine, University of Adelaide, Adelaide, SA 5001, Australia
| | - Loredana G. Marcu
- Cancer Research Institute, University of South Australia, Adelaide, SA 5001, Australia; (E.B.); (K.V.C.-C.)
- Faculty of Informatics and Science, University of Oradea, 1 Universitatii Str., 410087 Oradea, Romania
- Correspondence:
| | - Magdalena Stoeva
- Department of Diagnostic Imaging, Medical University of Plovdiv, 4002 Plovdiv, Bulgaria;
| | - Lenka Lhotska
- Faculty of Biomedical Engineering, Czech Technical University in Prague, 160 00 Prague 6, Czech Republic;
| | | | - Fatimah Ibrahim
- Department of Biomedical Engineering, Centre for Innovation in Medical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia;
| | - Eleni Kaldoudi
- School of Medicine, Democritus University of Thrace, 69100 Alexandroupoli, Greece;
| | - Sierin Lim
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637457, Singapore;
| | - Ana Maria Marques da Silva
- School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre 90619-900, Brazil;
| | - Peck Ha Tan
- School of Engineering, Ngee Ann Polytechnic, Singapore 599489, Singapore;
| | - Virginia Tsapaki
- Medical Physics Department, Konstantopoulio General Hospitals, Nea Ionia, 14233 Athens, Greece;
| | - Monique Frize
- Department of Systems and Computer Engineering, Carleton University, Ottawa, ON K1S 5B6, Canada;
| |
Collapse
|
40
|
Iglesias I, Kanankege K, Valencia E, Liu C, Blanco C, Lim S, Gomez-Perez J, Tomas-Tenllado C, la Torre AD, Perez A. DiFLUsion: A new spatiotemporal early warning system for HPAI. Int J Infect Dis 2022. [DOI: 10.1016/j.ijid.2021.12.239] [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: 10/19/2022] Open
|
41
|
Lim S, Bayer T. Engineering biology in the environment and sustainability. Engineering Biology 2022; 6:1-2. [DOI: 10.1049/enb2.12019] [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: 11/20/2022] Open
Affiliation(s)
- Sierin Lim
- School of Chemical and Biomedical Engineering Nanyang Technological University Singapore
| | | |
Collapse
|
42
|
Lehenbauer K, Asch F, Weissman NJ, Grayburn P, Kar S, Lim S, Li D, Puri R, Kapadia S, Sannino A, Lindenfeld J, Abraham W, Mack MJ, Stone GW, Hahn R. Impact of changes in tricuspid regurgitation on clinical outcomes following mitral valve teer compared to guideline-directed medical therapy: a sub-analysis of the COAPT trial. Eur Heart J Cardiovasc Imaging 2022. [DOI: 10.1093/ehjci/jeab289.206] [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: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
OnBehalf
Cardiovascular Outcomes Assessment of the MitraClip Percutaneous Therapy for Heart Failure Patients with Functional Mitral Regurgitation (COAPT)
Background
Prior studies suggest tricuspid regurgitation (TR) diminishes/resolves following mitral valve surgery and thus do not require treatment and may not influence outcomes.
Purpose
We sought to evaluate the change in TR (ΔTR) and its association with outcomes after transcatheter edge-to-edge repair (TEER) compared with guideline-directed medical therapy (GDMT) in the COAPT trial.
Methods
Patients from the COAPT trial with echo core lab TR assessment at baseline and 30-day follow-up (n = 504) were included and divided into 2 groups: those whose TR worsened (ΔTR-INC) and those with no change or improvement in TR (ΔTR-SAME/DEC). Two-year composite endpoints of death or heart failure hospitalization (HFH) and the individual components were analyzed, after excluding events occurring within the first 30 days.
Results
ΔTR-SAME/DEC occurred in 430 pts (228 TEER, 202 GDMT) while ΔTR-INC was noted in 74 pts (38 TEER, 36 GDMT) (Figure 1A). From 30 days to 2 years, ΔTR-INC pts had a higher rate of the composite outcome of death or HFH compared with ΔTR-SAME/DEC (p = 0.006, Figure 1B). Both 2-year death (HR 1.52, 95% CI 1.01-2.27; p = 0.04) and HFH (HR 1.52, 95% CI 1.04-2.22; p = 0.03) were associated with ΔTR-INC. Assessed by treatment group (Figure 1C and 1D), the relationship between ΔTR-INC and composite death or HFH was significant in GDMT alone pts (HR 1.86, 95% CI 1.21-2.86) but not in TEER pts (HR 1.33, 95% CI 0.79-2.23), although interaction testing demonstrated consistency between the two treatments (Pint = 0.31).
Conclusions
Worsening TR at 30 days occurred in ∼15% of pts in the COAPT trial whether they were treated with TEER or GDMT alone. DTRINC was associated with increased death and HFH during 2-year follow-up. Abstract Figure 1
Collapse
Affiliation(s)
- K Lehenbauer
- Columbia University Medical Center, New York, United States of America
| | - F Asch
- Medstar Research Institute, Washington, DC, United States of America
| | - NJ Weissman
- Medstar Research Institute, Washington, DC, United States of America
| | - P Grayburn
- Baylor Scott & White Health, Plano, United States of America
| | - S Kar
- Los Robles Health System, Los Angeles, United States of America
| | - S Lim
- University of Virginia, Charlottesville, United States of America
| | - D Li
- Cardiovascular Research Foundation, New York, United States of America
| | - R Puri
- Cleveland Clinic, Cleveland, United States of America
| | - S Kapadia
- Cleveland Clinic, Cleveland, United States of America
| | - A Sannino
- Baylor Scott & White Health, Plano, United States of America
| | - J Lindenfeld
- Vanderbilt University Medical Center, Nashville, United States of America
| | - W Abraham
- Ohio State University Wexner Medical Center, Columbus, United States of America
| | - MJ Mack
- Baylor Scott & White Health, Plano, United States of America
| | - GW Stone
- Icahn School of Medicine at Mount Sinai, New York, United States of America
| | - R Hahn
- Columbia University Medical Center, New York, United States of America
| |
Collapse
|
43
|
Singh J, Steele TWJ, Lim S. Fibrillated bacterial cellulose liquid carbene bioadhesives for mimicking and bonding oral cavity surfaces. J Mater Chem B 2022; 10:2570-2583. [PMID: 34981107 DOI: 10.1039/d1tb02044g] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Topical treatments for oral wounds and infections exhibit weak adhesion to wet surfaces which results in short retention duration (6-8 hours), frequent dosing requirement and patient incompatibility. To address these limitations, aqueous composites made of fibrillated bacterial cellulose and photoactive bioadhesives are designed for soft epithelial surfaces. The aqueous composites crosslink upon photocuring within a minute and exhibit a transition from viscous to elastic adhesive hydrogels. The light-cured composites have shear moduli mimicking oral mucosa and other soft tissues. The tunable adhesion strength ranges from 3 to 35 kPa on hydrated tissue-mimicking surfaces (collagen film). The results support the application of bacterial cellulose hydrogel systems for potential treatment of mucosal wounds.
Collapse
Affiliation(s)
- Juhi Singh
- NTU Institute for Health Technologies, Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, 637335, Singapore. .,School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Block N1.3, 637457, Singapore.
| | - Terry W J Steele
- School of Materials Science and Engineering (MSE), Division of Materials Technology, Nanyang Technological University (NTU), 639798, Singapore.
| | - Sierin Lim
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Block N1.3, 637457, Singapore.
| |
Collapse
|
44
|
Lim S, Mangala M, Holliday M, Ross S, Liang W, Ranpura G, Cserne Szappanos H, Hill A, Semsarian C, Hool L. Slow Conduction Velocity Revealed in Hypertrophic Cardiomyopathy Modelled With Patient-Derived Induced Pluripotent Stem Cell Cardiomyocytes. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.04.024] [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]
|
45
|
Lim BO, Kim J, Kim SH, Cho JH, Lim S, Lim ST. The effects of taekwondo shoes on anterior cruciate ligament injury risk factors during jump whip kicks. Sci Sports 2022. [DOI: 10.1016/j.scispo.2021.04.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
46
|
Luo M, Fu A, Wu R, Wei N, Song K, Lim S, Luo KQ. High Expression of G6PD Increases Doxorubicin Resistance in Triple Negative Breast Cancer Cells by Maintaining GSH Level. Int J Biol Sci 2022; 18:1120-1133. [PMID: 35173543 PMCID: PMC8771852 DOI: 10.7150/ijbs.65555] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 11/16/2021] [Indexed: 11/25/2022] Open
Abstract
Resistance to doxorubicin (DOX) remains a big challenge to breast cancer treatment especially for triple negative breast cancer (TNBC). Our previous study revealed that the antioxidant system plays an important role in conferring metastasis derived DOX resistance. In this study, we used two-dimensional difference gel electrophoresis (2D-DIGE) proteomics to compare the expression profiles of two generations of TNBC cell lines which have increased metastatic ability in nude mice and exhibited resistance to DOX. Through careful analyses, one antioxidant protein: glucose-6-phosphate dehydrogenase (G6PD) was identified with 3.2-fold higher level in metastatic/DOX-resistant 231-M1 than its parental 231-C3 cells. Analyses of clinical data showed that TNBC patients with higher G6PD levels exhibited lower overall survival than patients with lower G6PD level. Reducing G6PD expression by siRNA or inhibiting its activity with dehydroepiandrosterone (DHEA) significantly increased DOX's cytotoxicity in both cell lines. Importantly, inhibiting G6PD's activity with DHEA dramatically increased the apoptotic rate of 1.25 µM DOX from 2% to 54%. Our results suggest that high level of G6PD can help TNBC to resist DOX-induced oxidative stress. Thus, inhibiting G6PD shall be a good strategy to treat DOX-resistant TNBC.
Collapse
|
47
|
Park E, Ha J, Lim S, Kim G, Yoon Y. Development of postbiotics by whey bioconversion with Enterococcus faecalis M157 KACC81148BP and Lactococcus lactis CAU2013 KACC81152BP for treating periodontal disease and improving gut health. J Dairy Sci 2021; 104:12321-12331. [PMID: 34600708 DOI: 10.3168/jds.2021-20616] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 08/18/2021] [Indexed: 12/15/2022]
Abstract
This study developed postbiotics with whey bioconversion product produced by Enterococcus faecalis M157 KACC 81148BP, and mixed whey bioconversion products produced by E. faecalis M157 KACC 81148BP and Lactococcus lactis ssp. lactis CAU2013 KACC 81152BP to alleviate periodontitis (PD) and to improve gut health. The powdered whey bioconversion product (EF) produced by E. faecalis M157 KACC 81148BP, mixed whey bioconversion products (EF+LL) from E. faecalis M157 KACC 81148BP and L. lactis CAU2013 KACC 81152BP, and phosphate-buffered saline (PBS; control) were administered orally to PD-induced rats for 8 wk. Infiltration of inflammatory cells and epithelial proliferation in periodontal tissue were found in control, but the lesions were reduced in PD+EF group (administration of EF to PD-induced rats), and no lesions were observed in PD+EF+LL group (administration of EF+LL to PD-induced rats). The bone loss volumes in PD+EF and PD+EF+LL groups were lower than in control. Cytokine production levels related to inflammation were lower and antioxidative stress markers were higher in PD+EF and PD+EF+LL groups than in control for both periodontal tissue and gut. The ratios of Lactobacillus spp. in gut microbiome of PD+EF and PD+EF+LL groups were higher than in control. These results indicate that the whey bioconversion product produced by E. faecalis M157 KACC 81148BP, and mixed whey bioconversion products produced by E. faecalis M157 KACC 81148BP and L. lactis CAU2013 KACC 81152BP are effective on relieving periodontitis and improving the gut health.
Collapse
Affiliation(s)
- E Park
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea
| | - J Ha
- Center for Consumer Health Research, CHA Advanced Research Institute, Seongnam 13488, Korea
| | - S Lim
- Food Standard Research Center, Korea Food Research Institute, Jeollabuk-do 55365, Korea
| | - G Kim
- Department of Animal Science and and Technology, Chung-Ang University, Anseong 17546, Korea
| | - Y Yoon
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea; Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea.
| |
Collapse
|
48
|
Mohd Said N, Ho F, Chen M, Ling N, Mohd Rais N, Chun M, Ng Y, Eng W, Chen W, Yao Y, Chien J, Loy Y, Ong J, Luah V, Soh T, Wong W, Lim S, Pang A. Implementation of a multidisciplinary golden (geriatric oncology longitudinal end to end) service in a tertiary cancer centre in Singapore. J Geriatr Oncol 2021. [DOI: 10.1016/s1879-4068(21)00432-x] [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: 11/17/2022]
|
49
|
Singh J, Tan NCS, Mahadevaswamy UR, Chanchareonsook N, Steele TWJ, Lim S. Bacterial cellulose adhesive composites for oral cavity applications. Carbohydr Polym 2021; 274:118403. [PMID: 34702445 DOI: 10.1016/j.carbpol.2021.118403] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 05/05/2021] [Revised: 06/22/2021] [Accepted: 07/04/2021] [Indexed: 11/19/2022]
Abstract
Topical approaches to oral diseases require frequent dosing due to limited retention time. A mucoadhesive drug delivery platform with extended soft tissue adhesion capability of up to 7 days is proposed for on-site management of oral wound. Bacterial cellulose (BC) and photoactivated carbene-based bioadhesives (PDz) are combined to yield flexible film platform for interfacing soft tissues in dynamic, wet environments. Structure-activity relationships evaluate UV dose and hydration state with respect to adhesive strength on soft tissue mimics. The bioadhesive composite has an adhesion strength ranging from 7 to 17 kPa and duration exceeding 48 h in wet conditions under sustained shear forces, while other mucoadhesives based on hydrophilic macromolecules exhibit adhesion strength of 0.5-5 kPa and last only a few hours. The work highlights the first evaluation of BC composites for mucoadhesive treatments in the buccal cavity.
Collapse
Affiliation(s)
- Juhi Singh
- NTU Institute for Health Technologies, Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, Singapore 637335, Singapore; School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Block N1.3, Singapore 637457, Singapore.
| | - Nigel C S Tan
- School of Materials Science and Engineering, Division of Materials Technology, Nanyang Technological University, 50 Nanyang Avenue, Block N4.1, Singapore 639798, Singapore.
| | - Usha Rani Mahadevaswamy
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Block N1.3, Singapore 637457, Singapore.
| | - Nattharee Chanchareonsook
- Department of Oral and Maxillofacial Surgery, National Dental Centre Singapore (NDCS), 5 Second Hospital Avenue, Singapore 16893, Singapore
| | - Terry W J Steele
- School of Materials Science and Engineering, Division of Materials Technology, Nanyang Technological University, 50 Nanyang Avenue, Block N4.1, Singapore 639798, Singapore.
| | - Sierin Lim
- NTU Institute for Health Technologies, Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, Singapore 637335, Singapore; School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Block N1.3, Singapore 637457, Singapore.
| |
Collapse
|
50
|
Slade A, O'Hara M, Quinn D, Marley L, Griffith S, Haque M, Calvert M, Lim S, Lane D. Using group concept mapping software to develop a conceptual framework of left ventricular assist device recipients' experiences. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0948] [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
Advanced Heart failure (AHF) carries a high mortality rate. Heart transplantation is one therapeutic option, but low donation rates limits its availability. A left ventricular assist device (LVAD) is an alternative therapy which helps relieve symptoms, while improving prognosis and quality of life. However, lack of donors also means that the LVAD becomes a destination therapy by default.(1) Living with an LVAD requires significant psychological, social and physical adaptation for the recipients' and their families.(2) Patient reported outcome measures (PROMs) are one way of capturing these concerns and ongoing problems. Discussions with a patient and public involvement group found a range of issues not currently captured by available PROMS.
Aim
To develop a conceptual framework which reflects the experiences of LVAD recipients' and evaluate their importance for inclusion in PROMs using a research web platform.
Method
Participants were recruited from a regional transplant centre which covers a wide geographical area in the UK. Ethical approval was obtained and participants were recruited through routine LVAD clinics. Group concept mapping (GCM) is a semi-quantitative mixed methods approach that can be used to capture and quantify recipients' experiences.(3) Groupwisdom concept mapping software was used as the electronic data collection platform.(4) GCM consists of 3 stages: statement generation, thematic statement sorting, and rating statements for importance, relevance and frequency of impact. Multidimensional scaling and hierarchical cluster analysis produces visual representations of recipients' experiences as a points and cluster map, and scoring of statements produces relative importance of items across the clusters.
Results
18 LVAD recipients consented to take part. 101 items and 9 clusters were generated. Clusters represented: Activities; Partner/family dependency; Travel; Mental well-being; LVAD challenges; Equipment and clothing; Physical and cognitive limitations; Restrictions, and LVAD positives. LVAD Positives and LVAD restrictions were rated high for frequency, relevance and importance. Physical and cognitive limitations was rated high for importance and frequency. Equipment was rated high for relevance and frequency, and Challenges was rated high for relevance.
Conclusion
GCM and the online software is a useful tool for developing a conceptual framework and mapping key areas of importance for LVAD recipients, especially, when prioritising important patient reported outcome domains for use in clinical practice, future research and design evolution. Using an electronic platform allowed us to reach participants dispersed over a wide geographical area.
Funding Acknowledgement
Type of funding sources: Other. Main funding source(s): British Heart FoundationNational Institute for Health Research Cluster Rating Map for Importance
Collapse
Affiliation(s)
- A.L Slade
- Institute of Applied Health Research, Centre for Patient Reported Outcomes Research, Birmingham, United Kingdom
| | - M.E O'Hara
- University Hospitals Birmingham NHS Foundation Trust, Research and Development, Birmingham, United Kingdom
| | - D Quinn
- University Hospital Birmingham NHS Foundation trust, Department of cardiopulmonary transplantation, Birmingham, United Kingdom
| | - L Marley
- University Hospital Birmingham NHS Foundation trust, Department of cardiopulmonary transplantation, Birmingham, United Kingdom
| | - S Griffith
- Institute of Applied Health Research, Centre for Patient Reported Outcomes Research, Birmingham, United Kingdom
| | - M.S Haque
- University of Birmingham, Primary Care Clinical Sciences, Birmingham, United Kingdom
| | - M.J Calvert
- Institute of Applied Health Research, Centre for Patient Reported Outcomes Research, Birmingham, United Kingdom
| | - S Lim
- University Hospitals Birmingham NHS Foundation Trust, Cardiology, Birmingham, United Kingdom
| | - D.A Lane
- University of Liverpool, Liverpool Centre for Cardiovascular Science, Liverpool, United Kingdom
| |
Collapse
|