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Lucero-Prisno DE, Shomuyiwa DO, Vicente CR, Méndez MJG, Qaderi S, Lopez JC, Mogessie YG, Alacapa J, Chamlagai L, Ndayizeye R, Kinay P. Achieving herd immunity in South America. Glob Health Res Policy 2023; 8:2. [PMID: 36726143 PMCID: PMC9891655 DOI: 10.1186/s41256-023-00286-2] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 01/06/2023] [Indexed: 02/03/2023] Open
Abstract
South America, once an epicenter of COVID-19, has stayed on the road of continued management of the pandemic. The region initially struggled to cope with the pandemic as it experienced spiraling numbers of infections and overwhelmed public health systems. South America has risen in its pandemic response to be the region with the highest global vaccination rate. The region posed a strong vaccination drive, with over 76% of its population fully vaccinated with the initial protocol. South America leveraged its deeply rooted vaccination culture and public health confidence among its population. Herd immunity is an integral concept in population infectious disease management. Attaining herd immunity is presently not feasible with available vaccines, but the high vaccination rate in the region depicts the acceptance of vaccination as a strategy for population protection. The availability of effective transmission-blocking vaccines, the continuous implementation of strategies that will enable the undisrupted supply of the vaccines, equity in access to the vaccines, improved vaccine acceptance, and trust in the vaccination and public health systems will help shepherd the region towards herd immunity. Local vaccine production backed with investment in infrastructure and international collaboration for research and knowledge development will also drive population safety.
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Affiliation(s)
- Don Eliseo Lucero-Prisno
- grid.8991.90000 0004 0425 469XDepartment of Global Health and Development, London School of Hygiene and Tropical Medicine, London, UK ,grid.449732.f0000 0001 0164 8851Faculty of Management and Development Studies, University of the Philippines Open University, Los Banos, Laguna Philippines ,grid.10223.320000 0004 1937 0490Faculty of Public Health, Mahidol University, Bangkok, Thailand
| | | | - Creuza Rachel Vicente
- grid.412371.20000 0001 2167 4168Department of Social Medicine, Federal University of Espírito Santo, Vitória, Brazil ,grid.412371.20000 0001 2167 4168Postgraduate Program in Infectious Diseases, Federal University of Espírito Santo, Vitória, Brazil
| | | | - Shohra Qaderi
- grid.2515.30000 0004 0378 8438Maternal Fetal Care Center, Boston Children’s Hospital, Harvard Medical School, Boston, MA USA
| | - Jaifred Christian Lopez
- grid.26009.3d0000 0004 1936 7961Department of Population Health Sciences, School of Medicine, Duke University, Durham, NC USA
| | - Yidnekachew Girma Mogessie
- grid.21107.350000 0001 2171 9311Johns Hopkins Bloomberg School of Public Health, Baltimore, MD USA ,Johns Hopkins Carey Business School, Baltimore, MD USA
| | - Jason Alacapa
- grid.21107.350000 0001 2171 9311Johns Hopkins Bloomberg School of Public Health, Baltimore, MD USA
| | - Lila Chamlagai
- grid.40263.330000 0004 1936 9094School of Public Health, Brown University, Providence, RI USA
| | - Remy Ndayizeye
- grid.253615.60000 0004 1936 9510George Washington University, Washington, DC USA
| | - Pelin Kinay
- grid.139596.10000 0001 2167 8433School of Climate Change and Adaptation, University of Prince Edward Island, Charlottetown, Canada
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Pett SL, Wand H, Law MG, Arduino R, Lopez JC, Knysz B, Pereira LC, Pollack S, Reiss P, Tambussi G. Evaluation of Subcutaneous Proleukin (interleukin-2) in a Randomized International Trial (ESPRIT): geographical and gender differences in the baseline characteristics of participants. HIV Clin Trials 2006; 7:70-85. [PMID: 16798622 DOI: 10.1310/4733-acqf-f3p4-2qac] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND ESPRIT, is a phase III, open-label, randomized, international clinical trial evaluating the effects of subcutaneous recombinant interleukin-2 (rIL-2) plus antiretroviral therapy (ART) versus ART alone on HIV-disease progression and death in HIV-1-infected individuals with CD4+ T-cells > or =300 cells/microL. OBJECTIVES To describe the baseline characteristics of participants randomized to ESPRIT overall and by geographic location. METHOD Baseline characteristics of randomized participants were summarized by region. RESULTS 4,150 patients were enrolled in ESPRIT from 254 sites in 25 countries. 41%, 27%, 16%, 11%, and 5% were enrolled in Europe, North America, South America, Asia, and Australia, respectively. The median age was 40 years, 81% were men, and 76%, 11%, and 9% were Caucasian, Asian, and African American or African, respectively. 44% of women enrolled (n = 769) were enrolled in Thailand and Argentina. Overall, 55% and 38% of the cohort acquired HIV through male homosexual and heterosexual contact, respectively. 25% had a prior history of AIDS-defining illness; Pneumocystis jirovecii pneumonia, M. tuberculosis, and esophageal candida were most commonly reported. Median nadir and baseline CD4+ T-cell counts were 199 and 458 cells/muL, respectively. 6% and 13% were hepatitis B or C virus coinfected, respectively. Median duration of antiretroviral therapy (ART) was 4.2 years; the longest median duration was in Australia (5.2 years) and the shortest was in Asia (2.3 years). 17%, 13%, and 69% of participants began ART before 1995, between 1996 and 1997, and from 1998 onward, respectively. 86% used ART from two or more ART classes, with 49% using a protease inhibitor-based regimen and 46% using a nonnucleoside reverse transcriptase inhibitor-based regimen. 78% had plasma HIV RNA below detection (<500 cp/mL). CONCLUSION ESPRIT has enrolled a diverse population of HIV-infected individuals including large populations of women and patients of African-American/African and Asian ethnicity often underrepresented in HIV research. As a consequence, the results of the study may have wide global applicability.
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Affiliation(s)
- S L Pett
- National Centre in HIV Epidemiology and Clinical Research, University of New South Wales, Sydney, Australia.
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Otero MA, Wagner JR, Vasallo MC, Anon MC, Garcia L, Jimenez JC, Lopez JC. Thermal Denaturation Kinetics of Yeast Proteins in Whole Cells of Saccharomyces cerevisiae and Kluyveromyces fragilis. FOOD SCI TECHNOL INT 2002. [DOI: 10.1177/1082013202008003258] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Serrano J, Alonso D, Encinas JM, Lopez JC, Fernandez AP, Castro-Blanco S, Fernández-Vizarra P, Richart A, Bentura ML, Santacana M, Uttenthal LO, Cuttitta F, Rodrigo J, Martinez A. Adrenomedullin expression is up-regulated by ischemia-reperfusion in the cerebral cortex of the adult rat. Neuroscience 2002; 109:717-31. [PMID: 11927154 DOI: 10.1016/s0306-4522(01)00532-2] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [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: 11/23/2022]
Abstract
Changes in the pattern of adrenomedullin expression in the rat cerebral cortex after ischemia-reperfusion were studied by light and electron microscopic immunohistochemistry using a specific antibody against human adrenomedullin (22-52). Animals were subjected to 30 min of oxygen and glucose deprivation in a perfusion model simulating global cerebral ischemia, and the cerebral cortex was studied after 0, 2, 4, 6, 8, 10 or 12 h of reperfusion. Adrenomedullin immunoreactivity was elevated in certain neuronal structures after 6-12 h of reperfusion as compared with controls. Under these conditions, numerous large pyramidal neurons and some small neurons were intensely stained in all cortical layers. The number of immunoreactive pre- and post-synaptic structures increased with the reperfusion time. Neurons immunoreactive for adrenomedullin presented a normal morphology whereas non-immunoreactive neurons were clearly damaged, suggesting a potential cell-specific protective role for adrenomedullin. The number and intensity of immunoreactive endothelial cells were also progressively elevated as the reperfusion time increased. In addition, the perivascular processes of glial cells and/or pericytes followed a similar pattern, suggesting that adrenomedullin may act as a vasodilator in the cerebrocortical circulation. In summary, adrenomedullin expression is elevated after the ischemic insult and seems to be part of CNS response mechanism to hypoxic injury.
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Affiliation(s)
- J Serrano
- Department of Neuroanatomy and Cell Biology, Instituto Cajal. Madrid, Spain
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Kuo YM, Kokjohn TA, Beach TG, Sue LI, Brune D, Lopez JC, Kalback WM, Abramowski D, Sturchler-Pierrat C, Staufenbiel M, Roher AE. Comparative analysis of amyloid-beta chemical structure and amyloid plaque morphology of transgenic mouse and Alzheimer's disease brains. J Biol Chem 2001; 276:12991-8. [PMID: 11152675 DOI: 10.1074/jbc.m007859200] [Citation(s) in RCA: 200] [Impact Index Per Article: 8.7] [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: 11/06/2022] Open
Abstract
We have undertaken an integrated chemical and morphological comparison of the amyloid-beta (Abeta) molecules and the amyloid plaques present in the brains of APP23 transgenic (tg) mice and human Alzheimer's disease (AD) patients. Despite an apparent overall structural resemblance to AD pathology, our detailed chemical analyses revealed that although the amyloid plaques characteristic of AD contain cores that are highly resistant to chemical and physical disruption, the tg mice produced amyloid cores that were completely soluble in buffers containing SDS. Abeta chemical alterations account for the extreme stability of AD plaque core amyloid. The corresponding lack of post-translational modifications such as N-terminal degradation, isomerization, racemization, pyroglutamyl formation, oxidation, and covalently linked dimers in tg mouse Abeta provides an explanation for the differences in solubility between human AD and the APP23 tg mouse plaques. We hypothesize either that insufficient time is available for Abeta structural modifications or that the complex species-specific environment of the human disease is not precisely replicated in the tg mice. The appraisal of therapeutic agents or protocols in these animal models must be judged in the context of the lack of complete equivalence between the transgenic mouse plaques and the human AD lesions.
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Affiliation(s)
- Y M Kuo
- Longtine Center for Molecular Biology and Genetics and the Civin Laboratory of Neuropathology, Sun Health Research Institute, Sun City, Arizona 85351, USA
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Imamichi T, Berg SC, Imamichi H, Lopez JC, Metcalf JA, Falloon J, Lane HC. Relative replication fitness of a high-level 3'-azido-3'-deoxythymidine-resistant variant of human immunodeficiency virus type 1 possessing an amino acid deletion at codon 67 and a novel substitution (Thr-->Gly) at codon 69. J Virol 2000; 74:10958-64. [PMID: 11069990 PMCID: PMC113175 DOI: 10.1128/jvi.74.23.10958-10964.2000] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The combination of an amino acid deletion at codon 67 (delta 67) and Thr-to-Gly change at codon 69 (T69G) in the reverse transcriptase (RT) of human immunodeficiency virus type 1 (HIV-1) is associated with high-level resistance to multiple RT inhibitors. To determine the relative contributions of the delta 67 and T69G mutations on viral fitness, we performed a series of studies of HIV replication using recombinant variants. A high-level 3'-azido-3'-deoxythymidine (AZT)-resistant variant containing delta 67 plus T69G/K70R/L74I/K103N/T215F/K219Q in RT replicated as efficiently as wild-type virus (Wt). In contrast, the construct without delta 67 exhibited impaired replication (23% of growth of Wt). A competitive fitness study failed to reveal any differences in replication rates between the delta 67+T69G/K70R/L74I/K103N/T215F/+ ++K219Q mutant and Wt. Evaluation of proviral DNA sequences over a 3-year period in a patient harboring the multiresistant HIV revealed that the T69G mutation emerged in the context of a D67N/K70R/T215F/K219Q mutant backbone prior to appearance of the delta 67 deletion. To assess the impact of this stepwise accumulation of mutations on viral replication, a series of recombinant variants was constructed and analyzed for replication competence. The T69G mutation was found to confer 2',3'-dideoxyinosine resistance at the expense of fitness. Subsequently, the development of the delta 67 deletion led to a virus with improved replication and high-level AZT resistance.
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Affiliation(s)
- T Imamichi
- Laboratory of Molecular Retrovirology, Clinical Services Program, SAIC-Frederick, Frederick Cancer Research and Development Center, Frederick, Maryland 21702, USA.
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Abstract
The hydrogen-bonded complex between 6-oxabicyclo[3.1.0]hexane and hydrogen chloride was investigated by microwave spectroscopy in a supersonic jet. A dual flow pulsed valve was used to preclude chemical reaction between the monomers. Only the equatorial conformer was observed and the spectra of three isotopomers, (C5H8O, H35Cl), (C5H8O, H37Cl) and (C5H8O, D35Cl), were measured. The derived structure of the complex has Cs symmetry with the hydrogen chloride pointing to the domain of the equatorial lone pair of electrons at the oxygen atom. The three atoms involved in the hydrogen bond adopt a bent arrangement with a O...H distance of 1.77(4) A, a (O...H-Cl) angle of 115(4)degrees, and a deviation of 15.4(14)degrees of the hydrogen bond from collinearity. In agreement with the experimental results, ab initio calculations predict the equatorial form to be the most stable one.
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Affiliation(s)
- S Antolinez
- Departamento de Quimica Fisica, Facultad de Ciencias, Universidad de Valladolid, Spain
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Abstract
The rotational spectra for the ground and first excited torsional states v(t) = 0 and 1 in the frequency region of 8-254 GHz and the v(t) = 1 <-- 0 band high-resolution far-infrared spectrum of 2,2,2-d(3)-acetaldehyde (CD(3)CHO) were measured. We fitted a data set consisting of 1016 v(t) = 1 <-- 0 far-infrared lines together with 195 microwave lines in v(t) = 0 and 79 microwave lines in v(t) = 1 to near-experimental accuracy, using a global model from the earlier literature. The final fit includes lines with J </= 20 and requires 25 parameters to achieve root-mean-square deviations of 87 and 88 kHz for the microwave v(t) = 0 and 1 lines, respectively, and of 0.00048 cm(-1) for the far-infrared v(t) = 1-0 lines. This can be considered a good starting point for future analysis of CD(3)CHO. Copyright 1999 Academic Press.
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Affiliation(s)
- I Kleiner
- Laboratoire de Photophysique Moléculaire, Université Paris Sud, Bâtiment 210, Orsay Cedex, 91405, France
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Abstract
The millimeter-wave spectrum of 2,3-dihydrofuran in the ground and five ring-puckering excited states has been measured in the frequency range 100-250 GHz. The ground and first ring-puckering excited states have been fitted to a two-state Hamiltonian including Coriolis coupling interaction. The determined energy difference of 18.684(7) cm-1 between these states and the a and b type coupling parameters are consistent with the ring-puckering potential function and the previously observed dependence of the centrifugal distortion constants DeltaJK, DeltaK, and deltaK. A small ring-puckering dependence of the quartic centrifugal distortion constants DeltaJ and deltaJ has been also observed. This dependence is well accounted for in terms of the ring-puckering potential function and the vibrational dependence of the rotational constants.
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Affiliation(s)
- JC Lopez
- Laboratoire de Spectroscopie Hertzienne, Universite de Lille I, Villeneuve d'Ascq, F-59655, France
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Lopez JC, Ryan S, Blankenship RE. Sequence of the bchG gene from Chloroflexus aurantiacus: relationship between chlorophyll synthase and other polyprenyltransferases. J Bacteriol 1996; 178:3369-73. [PMID: 8655525 PMCID: PMC178097 DOI: 10.1128/jb.178.11.3369-3373.1996] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The sequence of the Chloroflexus aurantiacus open reading frame thought to be the C. aurantiacus homolog of the Rhodobacter capsulatus bchG gene is reported. The BchG gene product catalyzes esterification of bacteriochlorophyllide a by geranylgeraniol-PPi during bacteriochlorophyll a biosynthesis. Homologs from Arabidopsis thaliana, Synechocystis sp. strain PCC6803, and C. aurantiacus were identified in database searches. Profile analysis identified three related polyprenyltransferase enzymes which attach an aliphatic alcohol PPi to an aromatic substrate. This suggests a broader relationship between chlorophyll synthases and other polyprenyltransferases.
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Affiliation(s)
- J C Lopez
- Department of Chemistry and Biochemistry, Center for the Study of Early Events in Photosynthesis, Arizona State University, Tempe, 85287-1604, USA
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Lopez JC, Gomez AM, Fraserreid B. Cyclization Reactions of Tethered Radicals Derived From 4-O-Substituted α-D-erythro-Octa-2,6-dienopyranosides: Stereoselective Access to Carbocycles and Branched-Chain Sugars. Aust J Chem 1995. [DOI: 10.1071/ch9950333] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The chemo- and stereo- selectivities in the cyclization of tethered radicals, derived from α-D-erythro-octa-2,6-dienopyranosides, in which there is competition between 5-exo and 6-exo ring closures, have been examined. Use of silicon tethers resulted in a preferred 6-exo-trig addition. However, tethered mixed iodo acetals have shown an unprecedented relation between the stereogenic centre in the acetal and the preferred addition pathway. In addition, changes in the oxidation state at the termini of the olefins have a profound effect upon site selectivity, thus leading to 3-deoxy 3-C-substituted carbohydrates, off-template branched-chain sugars, or functionalized cyclopentanes.
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Abstract
The arsenic content of cows' milk consumed in Spain was determined. A procedure using dry ashing hydride generation atomic absorption spectrometry was developed for the purpose. Experimental conditions for the destruction of organic matter were established and an interference study was carried out. The method developed has a detection limit of 0.1 ng/g, a relative SD of 5%, and a recovery (mean +/- CSI) of 100 +/- 4%. The accuracy of the method was checked by analysis of a certified sample of IAEA milk powder (mean +/- CSI: certified, 4.85 +/- 0.32 ng/g; found, 5.04 +/- 0.81 ng/g). The proposed procedure was used to analyse cows' milk samples. The extremely low arsenic levels found do not present toxicological problems.
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Affiliation(s)
- M L Cervera
- Departamento de Química Analítica, Universidad de Valencia, España
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Rivilla F, Lopez JC. Meconium ileus equivalent and Kawasaki syndrome. Case report. Eur J Surg 1991; 157:151-2. [PMID: 1676312] [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] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Kawasaki syndrome appeared after operation for meconium ileus equivalent in a 4-year-old child with cystic fibrosis. The course and management are described.
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Affiliation(s)
- F Rivilla
- Department of Surgery, La Paz Children's Hospital, Madrid, Spain
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