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Tran VD, Huynh TMD, Pham DT, Le MH, Dorofeeva VV, Dewey RS. COVID-19 vaccination: public preference and intention in Vietnam. Ann Ig 2023; 35:331-343. [PMID: 36222608 DOI: 10.7416/ai.2022.2544] [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] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Backgrounds Understanding public opinion in relation to vaccination is critical, as there are several COVID-19 vaccines approved for use in Vietnam. This study aimed to assess public COVID-19 vaccine preferences and intention in Can Tho, Vietnam. Methods An analytical cross-sectional study was performed between September 20 and October 20, 2021. in people aged 18 and over living in Can Tho, Vietnam, A questionnaire captured demographic information, vaccination intention, preference for vaccine selection, and barriers and motivations related to COVID-19 vaccination. Predictors for vaccination willingness among unvaccinated people were determined using multivariable logistic regression. Results Out of the proposed vaccines that have been approved by the Vietnam Ministry of Health, AstraZeneca (31.4%), Pfizer (23.5%), and Moderna (14.7%) were the most preferred by participants. Out of 1,470 respondents, 35.8% have received at least one vaccine dose, and of these, 76.9% intended to continue to receive vaccinations. Among the unvaccinated, 74.8% reported that they would be willing to complete the vaccination. Most participants stated that they would receive a COVID-19 vaccine if provided with adequate information on effectiveness and safety (92.7%). The possibility of side effects after vaccination (75.4%) was the most important barrier to vaccination. Education, health status, and prior flu-vaccination were associated with the intention to receive a COVID-19 vaccination among those who had not previously received one. Conclusions Many unvaccinated adults were willing to receive a COVID-19 vaccination, with AstraZeneca being the preferred choice. These findings could help in the planning of vaccination campaigns to increase vaccination uptake in Vietnam.
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Affiliation(s)
- V D Tran
- Department of Drug Administration, Faculty of Pharmacy, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam, ORCID: 0000-0003-0421-5079
| | - T M D Huynh
- Department of Pharmaceutical industry - Pharmaceutics, Faculty of Pharmacy, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam, ORCID: 0000-0003-3306-3051
| | - D T Pham
- Department of Chemistry, College of Natural Sciences, Can Tho University, Can Tho, Vietnam, ORCID: 0000-0002-8693-3367
| | - M H Le
- Department of Traditional Medicine, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam, ORCID: 0000-0003-3306-3051
| | - V V Dorofeeva
- Department of Management and Economics of Drugs, Faculty of Medicine, Peoples' Friendship University of Russia (RUDN University), Moscow, Russia, ORCID: 0000-0001-5323-6517
| | - R S Dewey
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom, ORCID: 0000-0002-6888-3298
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Tran VD, Tran VD, Pham DT, Cao TTN, Bahlol M, Dewey RS, Le MH, Nguyen VA. Perspectives on COVID-19 prevention and treatment using herbal medicine in Vietnam: A cross-sectional study. Ann Ig 2022; 34:515-531. [PMID: 34882168 DOI: 10.7416/ai.2021.2484] [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] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
INTRODUCTION The significance of herbal medicine (HM) during the COVID-19 pandemic has been confirmed. Nevertheless, limited studies have included the people perspectives on COVID-19 prevention/treatment using herbal medicine in Vietnam. Thus, this study tackled the aforementioned issue. METHODS Online-based cross-sectional study was conducted in Vietnamese adults between February-April 2021. Descriptive analysis, regression and Chi-squared tests were implemented for the statistical purposes. RESULTS total of 787 respondents attended the study, 368 (46.8%) confirmed that they use herbal medicine/nutritional supplements for COVID-19 prevention/treatment. Over 50% of the respondents possessed positive perspective on vitamin C ingestion. Using herbal medicine for external use as a disinfectant was mostly preferred. Respondents who had a 'very good' health self-perception or who lived in rural areas, were more likely to have a positive opinion in the COVID-19 prevention/treatment using herbal medicine. The main barrier for herbal medicine utilization was the deficiency of personal experience or expert advice. CONCLUSION The Vietnamese people commonly utilize herbal medicine for the COVID-19 prevention/treatment. These data might help policy-makers in managing the public knowledge and practice on herbal medicine use in Vietnam.
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Affiliation(s)
- V D Tran
- Department of Drug Administration, Faculty of Pharmacy, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - V D Tran
- Department of Traditional Medicine, Faculty of Medicine, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - D T Pham
- Department of Chemistry, College of Natural Sciences, Can Tho University, Campus II, Can Tho, Vietnam
| | - T T N Cao
- Department of Biology - Genetics, Faculty of Basic Science, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - M Bahlol
- Pharmaceutical Management and Economics, Faculty of Pharmacy, Egyptian Russian University, Cairo, Egypt
- Pharmaceutical Management and Economics, Department of Clinical Pharmacy, Faculty of Pharmacy, Jazan University, Jazan, Saudi Arabia
| | - R S Dewey
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom
| | - M H Le
- Department of Traditional Medicine, Faculty of Medicine, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - V A Nguyen
- Department of Traditional Medicine, Can Tho General Hospital, Can Tho, Vietnam
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Dewey RS, Kitterick PT. Cochlear implant user perceptions of magnetic resonance imaging. Cochlear Implants Int 2021; 23:11-20. [PMID: 34315344 DOI: 10.1080/14670100.2021.1954748] [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: 10/20/2022]
Abstract
OBJECTIVES To characterise opinions about needing to undergo MRI within the population of current cochlear implant (CI) users. BACKGROUND Magnetic resonance imaging (MRI) of CI users is often associated with severe discomfort and magnet displacement. METHODS A global online survey of 310 CI users was conducted between 22nd July and 13th September 2020. RESULTS Only 55% of respondents had been told whether their model of CI could undergo MRI. 31% of respondents considered MRI when deciding whether to receive a CI, and 28% when deciding which CI model to have. 64% reported concerns related to their CI if needing MRI compared to 29% reporting concerns unrelated to their CI. Willingness to undergo MRI reduced when considering magnet removal, splinting, bandaging, local anaesthesia, lasting discomfort, an inability to use their CI, or a reduction in image quality because of their CI. The single most influential factor was the possibility of damaging their CI (63%). 59% of respondents would consider minor surgery to upgrade their retaining magnet to one of a rotating design. DISCUSSION These findings highlight the heterogeneity of CI users' opinions about MRI. CONCLUSION We suggest several opportunities for improving the dissemination of current and accurate MRI-related information for CI users.
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Affiliation(s)
- R S Dewey
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK.,Hearing Sciences, Division of Mental Health and Clinical Neurosciences, School of Medicine, University of Nottingham, Nottingham NG7 2UH, UK.,National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Nottingham, NG1 5DU, UK
| | - P T Kitterick
- Hearing Sciences, Division of Mental Health and Clinical Neurosciences, School of Medicine, University of Nottingham, Nottingham NG7 2UH, UK.,National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Nottingham, NG1 5DU, UK
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Dewey RS, Liesch JM, Williams HR, Sugg EE, Dolan CA, Davies P, Mumford RA, Albers-Schönberg G. Purification and characterization by fast-atom-bombardment mass spectrometry of the polymorphonuclear-leucocyte-elastase-generated A alpha (1-21) fragment of fibrinogen from human blood after incubation with calcium ionophore A23187. Biochem J 1992; 281 ( Pt 2):519-24. [PMID: 1736899 PMCID: PMC1130716 DOI: 10.1042/bj2810519] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 12/28/2022]
Abstract
The stimulation of human blood with a Ca2+ ionophore, A23187, leads to activation of polymorphonuclear leucocytes (PMN) with release of small amounts of catalyticaly active elastase, as demonstrated by the formation of a characteristic product, the N-terminal A alpha (1-21) peptide of the Aa subunit of fibrinogen. The identity of the peptide was initially established by radioimmunoassay (r.i.a.) with an antibody raised to A alpha (1-21). We now provide independent confirmation of the formation of A alpha (1-21) by fast-atom-bombardment-m.s. analysis of the fractions separated chromatographically after spiking of plasma samples with peptide labelled with [2H8]Phe at position 8. Identity of the peptides was established on the basis of their chromatographic retention time and by the distinct peaks in the mass spectra of these fractions. The relative intensities of the molecular ions of natural and labelled peptides were measured. On the basis of a comparison of the peaks of similar intensities, the concentration of the natural peptide at the time of spiking was close (79%) to the amount obtained by r.i.a. An additional peptide, des-alanyl-A alpha (2-21), was also seen. The total amount of material measured by r.i.a. could be accounted for by the sum of these two provides. The addition of label and assay by m.s. has provided an independent physical-chemical method for identifying A alpha (1-21) as a characteristic product of PMN elastase release in whole blood, but which is absent in freshly drawn blood.
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Affiliation(s)
- R S Dewey
- Merck Sharp and Dohme Research Laboratories, Rahway, NJ 07065
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Abstract
The antibiotic heneicomycin (1), C44H62N2O11, was isolated from cultures of Streptomyces filipinensis as an amorphous yellow powder. Mass spectral and NMR analysis showed the compound to be a deoxy modification of aurodox (2), a member of the elfamycin antibiotic family. A marked change in mass spectral fragmentation compared to aurodox and 1H NMR couplings indicated the absence of the hydroxyl at position 30 of aurodox (position 3 of the tetrahydropyran).
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Affiliation(s)
- R S Dewey
- Merck Sharp and Dohme Research Laboratories, Rahway, NJ 07065
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Abstract
The antibiotic efrotomycin (I), C59H88N2O20, was isolated from cultures of Nocardia lactamdurans as an amorphous yellow powder. Mass spectral and NMR analyses show that the compound is a glycoside of the known antibiotic aurodox (II), C44H62N2O12. Ozonolysis and hydrolysis of I produced the disaccharide V, 6-deoxy-4-O-(6-deoxy-2,4-di-O-methyl-alpha -L-mannopyranosyl)-3-O-methyl-beta-D-allopyranose. This disaccharide is attached to the 4-hydroxyl group of the hexahydropyran substructure of aurodox via a beta-linkage to C-1 of the allose.
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Napier MA, Dewey RS, Albers-Schönberg G, Bennett CD, Rodkey JA, Marsh EA, Whinnery M, Seymour AA, Blaine EH. Isolation and sequence determination of peptide components of atrial natriuretic factor. Biochem Biophys Res Commun 1984; 120:981-8. [PMID: 6539595 DOI: 10.1016/s0006-291x(84)80203-x] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The independent isolation and sequence determination in our laboratories of three closely related Atrial Natriuretic Factor peptides from rat atria confirm the sequences of ANF peptides reported by Seidah et al and synthesized by Nutt et al [Proc. Natl. Acad. Sci., (1984) in press] and contain the sequences reported by Flynn et al [Biochem. Biophys. Res. Commun. (1983) 117: 859-865] and by Currie et al [Science (1984) 223: 67-69]. In addition, we provide proof for a C-terminal tyrosine rather than tyrosine amide in our isolated peptides.
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Hensens OD, Dewey RS, Liesch JM, Napier MA, Reamer RA, Smith JL, Albers-Schönberg G, Goldberg IH. Neocarzinostatin chromophore: presence of a highly strained ether ring and its reaction with mercaptan and sodium borohydride. Biochem Biophys Res Commun 1983; 113:538-47. [PMID: 6223633 DOI: 10.1016/0006-291x(83)91759-x] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Spectroscopic evidence suggests the presence of a highly strained ether ring (Fig. 1) (possibly an epoxide) in the C12-subunit of the previously determined partial structure 2a (Fig. 2) of the major neocarzinostatin chromophore (NCS-Chrom A) which completes assignment of all the oxygens in the molecule. The main product from mercaptan treatment suggests opening of the ether ring involving the addition of one molecule of mercaptan as well as reduction of the C12-substructure, whereas a parallel two-step reduction occurs on NaBH4 treatment. Both reactions occur with rearrangement of the C12-substructure and the implication for the mechanism of action of NCS-Chrom A in DNA strand scission activity is discussed. The evidence suggests a downward revision of the molecular formula for NCS-Chrom A as well as minor components B and C by two protons.
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Gullo VP, Zimmerman SB, Dewey RS, Hensens O, Cassidy PJ, Oiwa R, Omura S. Factumycin, a new antibiotic (A40A): fermentation, isolation and antibacterial spectrum. J Antibiot (Tokyo) 1982; 35:1705-7. [PMID: 7166535 DOI: 10.7164/antibiotics.35.1705] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Napier MA, Goldberg IH, Hensens OD, Dewey RS, Liesch JM, Albers-Schönberg G. Neocarzinostatin chromophore: presence of a cyclic carbonate subunit and its modification in the structure of other biologically active forms. Biochem Biophys Res Commun 1981; 100:1703-12. [PMID: 6457603 DOI: 10.1016/0006-291x(81)90715-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Albers-Schönberg G, Dewey RS, Hensens OD, Liesch JM, Napier MA, Goldberg IH. Neocarzinostatin: chemical characterization and partial structure of the non-protein chromophore. Biochem Biophys Res Commun 1980; 95:1351-6. [PMID: 6448053 DOI: 10.1016/0006-291x(80)91622-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Zimmerman SB, Chalmers JH, Dewey RS, Stapley EO, Hernandez S. Heneicomycin, a new antibiotic (A21A): fermentation, isolation, and antibacterial spectrum. J Antibiot (Tokyo) 1979; 32:665-6. [PMID: 468741 DOI: 10.7164/antibiotics.32.665] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Dewey RS, Schoenewaldt EF, Joshua H, Paleveda WJ, Schwam H, Barkemeyer H, Arison BH, Veber DF, Strachan RG, Milkowski J, Denkewalter RG, Hirschmann R. The synthesis of peptides in aqueous medium. VII. The preparation and use of 2,5-thiazolidinediones in peptide synthesis. J Org Chem 1971; 36:49-59. [PMID: 5543046 DOI: 10.1021/jo00800a013] [Citation(s) in RCA: 45] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Jenkins SR, Nutt RF, Dewey RS, Veber DF, Holly FW, Paleveda WJ, Lanza T, Strachan RG, Schoenewaldt EF, Barkemeyer H, Dickinson MJ, Sondey J, Hirschmann R, Walton E. Studies on the total synthesis of an enzyme. 3. Synthesis of a protected hexacontapeptide corresponding to the 65-124 sequence of ribonuclease A. J Am Chem Soc 1969; 91:505-6. [PMID: 5782508 DOI: 10.1021/ja01030a053] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Dewey RS, Schoenewaldt EF, Joshua H, Paleveda WJ, Schwam H, Barkemeyer H, Arison BH, Veber DF, Denkewalter RG, Hirschmann R. Synthesis of peptides in aqueous medium. V. Preparation and use of 2,5-thiazolidinediones (NTA's). Use of the 13C-H nuclear magnetic resonance signal as internal standard for quantitative studies. J Am Chem Soc 1968; 90:3254-5. [PMID: 5649183 DOI: 10.1021/ja01014a059] [Citation(s) in RCA: 37] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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