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Affiliation(s)
| | | | - Julia Moore Vogel
- Scripps Research Translational Institute, Scripps Research, La Jolla, CA, USA
| | - Eric J Topol
- Scripps Research Translational Institute, Scripps Research, La Jolla, CA, USA.
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2
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Abstract
Long COVID is an often debilitating illness that occurs in at least 10% of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections. More than 200 symptoms have been identified with impacts on multiple organ systems. At least 65 million individuals worldwide are estimated to have long COVID, with cases increasing daily. Biomedical research has made substantial progress in identifying various pathophysiological changes and risk factors and in characterizing the illness; further, similarities with other viral-onset illnesses such as myalgic encephalomyelitis/chronic fatigue syndrome and postural orthostatic tachycardia syndrome have laid the groundwork for research in the field. In this Review, we explore the current literature and highlight key findings, the overlap with other conditions, the variable onset of symptoms, long COVID in children and the impact of vaccinations. Although these key findings are critical to understanding long COVID, current diagnostic and treatment options are insufficient, and clinical trials must be prioritized that address leading hypotheses. Additionally, to strengthen long COVID research, future studies must account for biases and SARS-CoV-2 testing issues, build on viral-onset research, be inclusive of marginalized populations and meaningfully engage patients throughout the research process.
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Affiliation(s)
| | | | - Julia Moore Vogel
- Scripps Research Translational Institute, Scripps Research, La Jolla, CA, USA
| | - Eric J Topol
- Scripps Research Translational Institute, Scripps Research, La Jolla, CA, USA.
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3
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King K, Davis HE, Moorman-Li R, Cook KJ, Seligson ND. Development of a Campus-Wide Community Service Initiative during a Pandemic. Pharmacy 2022; 10:pharmacy10030047. [PMID: 35645326 PMCID: PMC9149954 DOI: 10.3390/pharmacy10030047] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 04/15/2022] [Accepted: 04/16/2022] [Indexed: 12/07/2022] Open
Abstract
Community service serves as a major aspect of pharmacy education; however, coronavirus disease 2019 (COVID-19) represented a significant disruption to student involvement. The College of Pharmacy student council, which serves as the local student government organization for the University of Florida College of Pharmacy, Jacksonville campus, developed a community service initiative to offer more consistent opportunities for students to participate in community service events, while adapting to COVID-19 restrictions. A retrospective, qualitative review of this initiative demonstrates the potential value of this model. Prior to this initiative, students relied on individual student organizations to provide service opportunities to their members. This excluded portions of the student body and led to sparse and inconsistent events, with limited variation in the types of service events available. Furthermore, de-centralized planning of service opportunities increased the difficulty of ensuring that COVID-19 safety restrictions were followed appropriately. This initiative resulted in 39 students logging over 200 service hours through nine events in the first seven months after its development. Despite the challenges presented by the COVID-19 pandemic, our centralized initiative serves as a model for improving community service involvement.
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Affiliation(s)
- Kevan King
- Department of Pharmacotherapy and Translational Research, University of Florida, Jacksonville, FL 32209, USA; (K.K.); (H.E.D.); (R.M.-L.); (K.J.C.)
| | - Hannah E. Davis
- Department of Pharmacotherapy and Translational Research, University of Florida, Jacksonville, FL 32209, USA; (K.K.); (H.E.D.); (R.M.-L.); (K.J.C.)
| | - Robin Moorman-Li
- Department of Pharmacotherapy and Translational Research, University of Florida, Jacksonville, FL 32209, USA; (K.K.); (H.E.D.); (R.M.-L.); (K.J.C.)
| | - Kelsey J. Cook
- Department of Pharmacotherapy and Translational Research, University of Florida, Jacksonville, FL 32209, USA; (K.K.); (H.E.D.); (R.M.-L.); (K.J.C.)
- Precision Medicine Program, Nemours Children’s Health, Jacksonville, FL 32207, USA
| | - Nathan D. Seligson
- Department of Pharmacotherapy and Translational Research, University of Florida, Jacksonville, FL 32209, USA; (K.K.); (H.E.D.); (R.M.-L.); (K.J.C.)
- Precision Medicine Program, Nemours Children’s Health, Jacksonville, FL 32207, USA
- Correspondence: ; Tel.: +(904)-244-9590
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4
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O'Neill E, Davis HE, MacMillan HA. A lack of repeatability creates the illusion of a trade-off between basal and plastic cold tolerance. Proc Biol Sci 2021; 288:20212121. [PMID: 34875191 PMCID: PMC8651406 DOI: 10.1098/rspb.2021.2121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 11/17/2021] [Indexed: 01/10/2023] Open
Abstract
The thermotolerance-plasticity trade-off hypothesis predicts that ectotherms with greater basal thermal tolerance have a lower acclimation capacity. This hypothesis has been tested at both high and low temperatures but the results often conflict. If basal tolerance constrains plasticity (e.g. through shared mechanisms that create physiological constraints), it should be evident at the level of the individual, provided the trait measured is repeatable. Here, we used chill-coma onset temperature and chill-coma recovery time (CCO and CCRT; non-lethal thermal limits) to quantify cold tolerance of Drosophila melanogaster across two trials (pre- and post-acclimation). Cold acclimation improved cold tolerance, as expected, but individual measurements of CCO and CCRT in non-acclimated flies were not (or only slightly) repeatable. Surprisingly, however, there was still a strong correlation between basal tolerance and plasticity in cold-acclimated flies. We argue that this relationship is a statistical artefact (specifically, a manifestation of regression to the mean; RTM) and does not reflect a true trade-off or physiological constraint. Thermal tolerance trade-off patterns in previous studies that used similar methodology are thus likely to be impacted by RTM. Moving forward, controlling and/or correcting for RTM effects is critical to determining whether such a trade-off or physiological constraint exists.
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Affiliation(s)
- Erica O'Neill
- Department of Biology, Carleton University, ON K1S 5B6, Canada
| | - Hannah E. Davis
- Department of Biology, Carleton University, ON K1S 5B6, Canada
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Diaz JV, Herridge M, Bertagnolio S, Davis HE, Dua T, Kaushic C, Marshall JC, del Rosario Pérez M, Strub-Wourgaft N, Soriano JB. Towards a universal understanding of post COVID-19 condition. Bull World Health Organ 2021; 99:901-903. [PMID: 34866686 PMCID: PMC8640686 DOI: 10.2471/blt.21.286249] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/07/2021] [Accepted: 06/24/2021] [Indexed: 12/28/2022] Open
Affiliation(s)
- Janet V Diaz
- Clinical Management Team, World Health Organization, Avenue Appia 20, 1211 Geneva 27, Switzerland
| | - Margaret Herridge
- Department of Medicine, Interdepartmental Division of Critical Care, University of Toronto, Toronto, Canada
| | - Silvia Bertagnolio
- Department of Control, Surveillance and Prevention of Antimicrobial Resistance, World Health Organization, Geneva, Switzerland
| | - Hannah E Davis
- Patient-Led Research Collaborative, United States of America
| | - Tarun Dua
- Brain Health Unit, World Health Organization, Geneva, Switzerland
| | - Charu Kaushic
- CIHR Institute of Infection and Immunity, McMaster University, Hamilton, Canada
| | - John C Marshall
- Departments of Surgery and Critical Care Medicine, St Michael's Hospital, Toronto, Canada
| | - Maria del Rosario Pérez
- Clinical Management Team, World Health Organization, Avenue Appia 20, 1211 Geneva 27, Switzerland
| | | | - Joan B Soriano
- Clinical Management Team, World Health Organization, Avenue Appia 20, 1211 Geneva 27, Switzerland
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6
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Deer RR, Rock MA, Vasilevsky N, Carmody L, Rando H, Anzalone AJ, Basson MD, Bennett TD, Bergquist T, Boudreau EA, Bramante CT, Byrd JB, Callahan TJ, Chan LE, Chu H, Chute CG, Coleman BD, Davis HE, Gagnier J, Greene CS, Hillegass WB, Kavuluru R, Kimble WD, Koraishy FM, Köhler S, Liang C, Liu F, Liu H, Madhira V, Madlock-Brown CR, Matentzoglu N, Mazzotti DR, McMurry JA, McNair DS, Moffitt RA, Monteith TS, Parker AM, Perry MA, Pfaff E, Reese JT, Saltz J, Schuff RA, Solomonides AE, Solway J, Spratt H, Stein GS, Sule AA, Topaloglu U, Vavougios GD, Wang L, Haendel MA, Robinson PN. Characterizing Long COVID: Deep Phenotype of a Complex Condition. EBioMedicine 2021; 74:103722. [PMID: 34839263 PMCID: PMC8613500 DOI: 10.1016/j.ebiom.2021.103722] [Citation(s) in RCA: 102] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/22/2021] [Accepted: 11/15/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Numerous publications describe the clinical manifestations of post-acute sequelae of SARS-CoV-2 (PASC or "long COVID"), but they are difficult to integrate because of heterogeneous methods and the lack of a standard for denoting the many phenotypic manifestations. Patient-led studies are of particular importance for understanding the natural history of COVID-19, but integration is hampered because they often use different terms to describe the same symptom or condition. This significant disparity in patient versus clinical characterization motivated the proposed ontological approach to specifying manifestations, which will improve capture and integration of future long COVID studies. METHODS The Human Phenotype Ontology (HPO) is a widely used standard for exchange and analysis of phenotypic abnormalities in human disease but has not yet been applied to the analysis of COVID-19. FUNDING We identified 303 articles published before April 29, 2021, curated 59 relevant manuscripts that described clinical manifestations in 81 cohorts three weeks or more following acute COVID-19, and mapped 287 unique clinical findings to HPO terms. We present layperson synonyms and definitions that can be used to link patient self-report questionnaires to standard medical terminology. Long COVID clinical manifestations are not assessed consistently across studies, and most manifestations have been reported with a wide range of synonyms by different authors. Across at least 10 cohorts, authors reported 31 unique clinical features corresponding to HPO terms; the most commonly reported feature was Fatigue (median 45.1%) and the least commonly reported was Nausea (median 3.9%), but the reported percentages varied widely between studies. INTERPRETATION Translating long COVID manifestations into computable HPO terms will improve analysis, data capture, and classification of long COVID patients. If researchers, clinicians, and patients share a common language, then studies can be compared/pooled more effectively. Furthermore, mapping lay terminology to HPO will help patients assist clinicians and researchers in creating phenotypic characterizations that are computationally accessible, thereby improving the stratification, diagnosis, and treatment of long COVID. FUNDING U24TR002306; UL1TR001439; P30AG024832; GBMF4552; R01HG010067; UL1TR002535; K23HL128909; UL1TR002389; K99GM145411.
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Affiliation(s)
- Rachel R Deer
- University of Texas Medical Branch, Galveston, TX, USA.
| | | | - Nicole Vasilevsky
- Center for Health AI, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Monarch Initiative
| | - Leigh Carmody
- Monarch Initiative; The Jackson Laboratory for Genomic Medicine, Farmington, CT, USA
| | - Halie Rando
- Center for Health AI, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Alfred J Anzalone
- Department of Neurological Sciences, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Marc D Basson
- Department of Surgery, University of North Dakota School of Medicine and Health Sciences
| | - Tellen D Bennett
- Section of Informatics and Data Science, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | | | - Eilis A Boudreau
- Department of Neurology; Department of Medical Informatics & Clinical Epidemiology, Oregon Health & Science University, Portland, OR 97239
| | - Carolyn T Bramante
- Departments of Internal Medicine and Pediatrics, University of Minnesota Medical School, Minneapolis, MN 55455
| | - James Brian Byrd
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Michigan Medical School, Ann Arbor, MI, 48109
| | - Tiffany J Callahan
- Center for Health AI, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Lauren E Chan
- Monarch Initiative; College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, USA
| | - Haitao Chu
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN USA
| | - Christopher G Chute
- Johns Hopkins University, Schools of Medicine, Public Health, and Nursing, Baltimore, MD, USA
| | - Ben D Coleman
- The Jackson Laboratory for Genomic Medicine, Farmington, CT, USA; Institute for Systems Genomics, University of Connecticut, Farmington, CT 06032, USA
| | | | - Joel Gagnier
- Departments of Orthopaedic Surgery & Epidemiology, University of Michigan, Ann Arbor, MI, USA
| | - Casey S Greene
- Center for Health AI, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - William B Hillegass
- University of Mississippi Medical Center, University of Mississippi Medical Center, Jackson, MS, USA; Departments of Data Science and Medicine
| | | | - Wesley D Kimble
- West Virginia Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, USA
| | | | | | - Chen Liang
- Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
| | - Feifan Liu
- Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA, USA
| | - Hongfang Liu
- Department of Artificial Intelligence and Informatics, Mayo Clinic, MN, USA
| | | | - Charisse R Madlock-Brown
- Department of Diagnostic and Health Sciences, University of Tennessee Health Science Center, 920 Madison Ave. Suite 518N, Memphis TN 38613
| | - Nicolas Matentzoglu
- Monarch Initiative; Semanticly Ltd; European Bioinformatics Institute (EMBL-EBI)
| | - Diego R Mazzotti
- Division of Medical Informatics, Department of Internal Medicine, University of Kansas Medical Center
| | - Julie A McMurry
- Center for Health AI, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Monarch Initiative
| | - Douglas S McNair
- Quantitative Sciences, Global Health Div., Gates Foundation, Seattle, WA 98109, USA
| | | | | | - Ann M Parker
- Pulmonary and Critical Care Medicine, Johns Hopkins University, Schools of Medicine, Baltimore, MD, USA
| | - Mallory A Perry
- Children's Hospital of Philadelphia Research Institute, Philadelphia, PA, USA
| | | | - Justin T Reese
- Monarch Initiative; Lawrence Berkeley National Laboratory
| | - Joel Saltz
- Stony Brook University; Biomedical Informatics
| | | | - Anthony E Solomonides
- Outcomes Research Network, Research Institute, NorthShore University HealthSystem, Evanston, IL 60201, USA; Institute for Translational Medicine, University of Chicago, Chicago, IL, USA
| | - Julian Solway
- Institute for Translational Medicine, University of Chicago, Chicago, IL, USA
| | - Heidi Spratt
- University of Texas Medical Branch, Galveston, TX, USA
| | - Gary S Stein
- University of Vermont Larner College of Medicine, Departments of Biochemistry and Surgery, Burlington, Vermont 05405
| | | | | | - George D Vavougios
- Department of Computer Science and Telecommunications, University of Thessaly, Papasiopoulou 2 - 4, P.C.; 131 - Galaneika, Lamia, Greece; Department of Neurology, Athens Naval Hospital 70 Deinokratous Street, P.C. 115 21 Athens, Greece; Department of Respiratory Medicine, Faculty of Medicine, University of Thessaly, Biopolis, P.C. 41500 Larissa, Greece
| | - Liwei Wang
- Department of Artificial Intelligence and Informatics, Mayo Clinic, MN, USA
| | - Melissa A Haendel
- Center for Health AI, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Monarch Initiative.
| | - Peter N Robinson
- Monarch Initiative; The Jackson Laboratory for Genomic Medicine, Farmington, CT, USA; Institute for Systems Genomics, University of Connecticut, Farmington, CT 06032, USA.
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7
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Davis HE, Assaf GS, McCorkell L, Wei H, Low RJ, Re'em Y, Redfield S, Austin JP, Akrami A. Characterizing long COVID in an international cohort: 7 months of symptoms and their impact. EClinicalMedicine 2021; 38:101019. [PMID: 34308300 PMCID: PMC8280690 DOI: 10.1016/j.eclinm.2021.101019] [Citation(s) in RCA: 1087] [Impact Index Per Article: 362.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/18/2021] [Accepted: 06/21/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND A significant number of patients with COVID-19 experience prolonged symptoms, known as Long COVID. Few systematic studies have investigated this population, particularly in outpatient settings. Hence, relatively little is known about symptom makeup and severity, expected clinical course, impact on daily functioning, and return to baseline health. METHODS We conducted an online survey of people with suspected and confirmed COVID-19, distributed via COVID-19 support groups (e.g. Body Politic, Long COVID Support Group, Long Haul COVID Fighters) and social media (e.g. Twitter, Facebook). Data were collected from September 6, 2020 to November 25, 2020. We analyzed responses from 3762 participants with confirmed (diagnostic/antibody positive; 1020) or suspected (diagnostic/antibody negative or untested; 2742) COVID-19, from 56 countries, with illness lasting over 28 days and onset prior to June 2020. We estimated the prevalence of 203 symptoms in 10 organ systems and traced 66 symptoms over seven months. We measured the impact on life, work, and return to baseline health. FINDINGS For the majority of respondents (>91%), the time to recovery exceeded 35 weeks. During their illness, participants experienced an average of 55.9+/- 25.5 (mean+/-STD) symptoms, across an average of 9.1 organ systems. The most frequent symptoms after month 6 were fatigue, post-exertional malaise, and cognitive dysfunction. Symptoms varied in their prevalence over time, and we identified three symptom clusters, each with a characteristic temporal profile. 85.9% of participants (95% CI, 84.8% to 87.0%) experienced relapses, primarily triggered by exercise, physical or mental activity, and stress. 86.7% (85.6% to 92.5%) of unrecovered respondents were experiencing fatigue at the time of survey, compared to 44.7% (38.5% to 50.5%) of recovered respondents. 1700 respondents (45.2%) required a reduced work schedule compared to pre-illness, and an additional 839 (22.3%) were not working at the time of survey due to illness. Cognitive dysfunction or memory issues were common across all age groups (~88%). Except for loss of smell and taste, the prevalence and trajectory of all symptoms were similar between groups with confirmed and suspected COVID-19. INTERPRETATION Patients with Long COVID report prolonged, multisystem involvement and significant disability. By seven months, many patients have not yet recovered (mainly from systemic and neurological/cognitive symptoms), have not returned to previous levels of work, and continue to experience significant symptom burden. FUNDING All authors contributed to this work in a voluntary capacity. The cost of survey hosting (on Qualtrics) and publication fee was covered by AA's research grant (Wellcome Trust/Gatsby Charity via Sainsbury Wellcome center, UCL).
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Affiliation(s)
| | | | | | | | - Ryan J. Low
- Patient-Led Research Collaborative
- Sainsbury Wellcome Centre, University College London, London, United Kingdom
| | - Yochai Re'em
- Patient-Led Research Collaborative
- Department of Psychiatry, NewYork-Presbyterian Hospital / Weill Cornell Medicine, NYC, United States
| | | | - Jared P. Austin
- Patient-Led Research Collaborative
- Oregon Health and Science University, Portland, OR, United States
| | - Athena Akrami
- Patient-Led Research Collaborative
- Sainsbury Wellcome Centre, University College London, London, United Kingdom
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Davis HE, Cheslock A, MacMillan HA. Chill coma onset and recovery fail to reveal true variation in thermal performance among populations of Drosophila melanogaster. Sci Rep 2021; 11:10876. [PMID: 34035382 PMCID: PMC8149885 DOI: 10.1038/s41598-021-90401-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 05/11/2021] [Indexed: 11/09/2022] Open
Abstract
Species from colder climates tend to be more chill tolerant regardless of the chill tolerance trait measured, but for Drosophila melanogaster, population-level differences in chill tolerance among populations are not always found when a single trait is measured in the laboratory. We measured chill coma onset temperature, chill coma recovery time, and survival after chronic cold exposure in replicate lines derived from multiple paired African and European D. melanogaster populations. The populations in our study were previously found to differ in chronic cold survival ability, which is believed to have evolved independently in each population pair; however, they did not differ in chill coma onset temperature and chill coma recovery time in a manner that reflected their geographic origins, even though these traits are known to vary with origin latitude among Drosophila species and are among the most common metrics of thermal tolerance in insects. While it is common practice to measure only one chill tolerance trait when comparing chill tolerance among insect populations, our results emphasise the importance of measuring more than one thermal tolerance trait to minimize the risk of missing real adaptive variation in insect thermal tolerance.
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Affiliation(s)
- Hannah E Davis
- Department of Biology and Institute of Biochemistry, Carleton University, Ottawa, K1S 5B6, Canada
| | - Alexandra Cheslock
- Department of Biology and Institute of Biochemistry, Carleton University, Ottawa, K1S 5B6, Canada
| | - Heath A MacMillan
- Department of Biology and Institute of Biochemistry, Carleton University, Ottawa, K1S 5B6, Canada.
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9
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McCorkell L, S Assaf G, E Davis H, Wei H, Akrami A. Patient-Led Research Collaborative: embedding patients in the Long COVID narrative. Pain Rep 2021; 6:e913. [PMID: 33987484 DOI: 10.31219/osf.io/n9e75] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 02/01/2021] [Accepted: 02/04/2021] [Indexed: 05/23/2023] Open
Abstract
A large subset of patients with coronavirus disease 2019 (COVID-19) are experiencing symptoms well beyond the claimed 2-week recovery period for mild cases. These long-term sequelae have come to be known as Long COVID. Originating out of a dedicated online support group, a team of patients formed the Patient-Led Research Collaborative and conducted the first research on Long COVID experience and symptoms. This article discusses the history and value of patient-centric and patient-led research; the formation of Patient-Led Research Collaborative as well as key findings to date; and calls for the following: the acknowledgement of Long COVID as an illness, an accurate estimate of the prevalence of Long COVID, publicly available basic symptom management, care, and research to not be limited to those with positive polymerase chain reaction and antibody tests, and aggressive research and investigation into the pathophysiology of symptoms.
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Affiliation(s)
| | - Gina S Assaf
- Patient-Led Research Collaborative, Washington DC, USA
| | | | - Hannah Wei
- Patient-Led Research Collaborative, Washington DC, USA
| | - Athena Akrami
- Patient-Led Research Collaborative, Washington DC, USA
- Sainsbury Wellcome Centre, University College London, London, United Kingdom
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10
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Rando HM, Bennett TD, Byrd JB, Bramante C, Callahan TJ, Chute CG, Davis HE, Deer R, Gagnier J, Koraishy FM, Liu F, McMurry JA, Moffitt RA, Pfaff ER, Reese JT, Relevo R, Robinson PN, Saltz JH, Solomonides A, Sule A, Topaloglu U, Haendel MA. Challenges in defining Long COVID: Striking differences across literature, Electronic Health Records, and patient-reported information. medRxiv 2021:2021.03.20.21253896. [PMID: 33791733 PMCID: PMC8010765 DOI: 10.1101/2021.03.20.21253896] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Since late 2019, the novel coronavirus SARS-CoV-2 has introduced a wide array of health challenges globally. In addition to a complex acute presentation that can affect multiple organ systems, increasing evidence points to long-term sequelae being common and impactful. The worldwide scientific community is forging ahead to characterize a wide range of outcomes associated with SARS-CoV-2 infection; however the underlying assumptions in these studies have varied so widely that the resulting data are difficult to compareFormal definitions are needed in order to design robust and consistent studies of Long COVID that consistently capture variation in long-term outcomes. Even the condition itself goes by three terms, most widely "Long COVID", but also "COVID-19 syndrome (PACS)" or, "post-acute sequelae of SARS-CoV-2 infection (PASC)". In the present study, we investigate the definitions used in the literature published to date and compare them against data available from electronic health records and patient-reported information collected via surveys. Long COVID holds the potential to produce a second public health crisis on the heels of the pandemic itself. Proactive efforts to identify the characteristics of this heterogeneous condition are imperative for a rigorous scientific effort to investigate and mitigate this threat.
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Affiliation(s)
- Halie M. Rando
- Center for Health AI, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, CO, USA
| | - Tellen D. Bennett
- Center for Health AI and Section of Informatics and Data Science, Department of Pediatrics, University of Colorado School of Medicine, University of Colorado, Aurora, CO, USA
| | | | | | - Tiffany J. Callahan
- Center for Health AI, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Computational Bioscience, University of Colorado Anschutz Medical Campus, Boulder, CO, USA
| | - Christopher G. Chute
- Schools of Medicine, Public Health, and Nursing, Johns Hopkins University, Baltimore, MD, USA
| | | | - Rachel Deer
- The University of Texas Medical Branch at Galveston, Galveston, TX, USA
| | - Joel Gagnier
- Computational Bioscience, University of Colorado Anschutz Medical Campus, Boulder, CO, USA
| | | | - Feifan Liu
- University of Massachusetts Medical School Worcester, Worcester, MA, USA
| | - Julie A. McMurry
- Center for Health AI, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Richard A. Moffitt
- Department of Biomedical Informatics, Stony Brook University, Stony Brook, NY, USA
| | - Emily R. Pfaff
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Justin T. Reese
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Rose Relevo
- Oregon Health & Science University, Portland, OR, USA
| | - Peter N. Robinson
- The Jackson Laboratory For Genomic Medicine, Farmington, CT, USA
- Institute for Systems Genomics, University of Connecticut, Farmington, CT, USA
| | - Joel H. Saltz
- Department of Biomedical Informatics, Stony Brook University, Stony Brook, NY, USA
| | | | - Anupam Sule
- Saint Joseph Mercy Health System, Ypsilanti, MI, USA
| | - Umit Topaloglu
- School of Medicine, Wake Forest University, Winston Salem, NC, USA
| | - Melissa A. Haendel
- Center for Health AI, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
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11
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El-Saadi MI, Ritchie MW, Davis HE, MacMillan HA. Warm periods in repeated cold stresses protect Drosophila against ionoregulatory collapse, chilling injury, and reproductive deficits. J Insect Physiol 2020; 123:104055. [PMID: 32380094 DOI: 10.1016/j.jinsphys.2020.104055] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 06/11/2023]
Abstract
In some insects, repeated cold stresses, characterized by warm periods that interrupt a sustained cold period, have been found to yield survival benefits over continuous cold stresses, but at the cost of reproduction. During a cold stress, chill susceptible insects like Drosophila melanogaster suffer from a loss of ion and water balance, and the current model of recovery from chilling posits that re-establishment of ion homeostasis begins upon return to a warm environment, but that it takes minutes to hours for an insect to fully restore homeostasis. Following this ionoregulatory model of chill coma recovery, we predicted that the longer the duration of the warm periods between cold stresses, the better a fly will endure a subsequent chill coma event and the more likely they will be to survive. We also predicted, however, that this recovery may lead to reduced fecundity, possibly due to allocation of energy reserves away from reproduction. Here, female D.melanogaster were treated to a long continuous cold stress (25 h at 0 °C), or experienced the same total time in the cold with repeated short (15 min), or long (120 min) breaks at 22 °C. We found that warm periods in general improved survival outcomes, and individuals that recovered for more time in between cold periods had significantly lower rates of injury, faster recovery from chill coma, and produced greater, rather than fewer, offspring. These improvements in chill tolerance were associated with mitigation of ionoregulatory collapse, as flies that experienced either short or long warm periods better maintained low hemolymph [K+]. Thus, warm periods that interrupt cold periods improve cold tolerance and fertility in D. melanogaster females relative to a single sustained cold stress, potentially because this time allows for recovery of ion and water homeostasis.
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Affiliation(s)
| | | | - Hannah E Davis
- Department of Biology, Carleton University, Ottawa K1S 5B6, Canada
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Esparza-Mora MA, Davis HE, Meconcelli S, Plarre R, McMahon DP. Inhibition of a Secreted Immune Molecule Interferes With Termite Social Immunity. Front Ecol Evol 2020. [DOI: 10.3389/fevo.2020.00075] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Jass A, Yerushalmi GY, Davis HE, Donini A, MacMillan HA. An impressive capacity for cold tolerance plasticity protects against ionoregulatory collapse in the disease vector Aedes aegypti. ACTA ACUST UNITED AC 2019; 222:jeb.214056. [PMID: 31732503 DOI: 10.1242/jeb.214056] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 09/10/2019] [Accepted: 11/10/2019] [Indexed: 12/30/2022]
Abstract
The mosquito Aedes aegypti is largely confined to tropical and subtropical regions, but its range has recently been spreading to colder climates. As insect biogeography is tied to environmental temperature, understanding the limits of A. aegypti thermal tolerance and their capacity for phenotypic plasticity is important in predicting the spread of this species. In this study, we report on the chill coma onset (CCO) and recovery time (CCRT), as well as low-temperature survival phenotypes of larvae and adults of A. aegypti that developed or were acclimated to 15°C (cold) or 25°C (warm). Cold acclimation did not affect CCO temperatures of larvae but substantially reduced CCO in adults. Temperature and the duration of exposure both affected CCRT, and cold acclimation strongly mitigated these effects and increased rates of survival following prolonged chilling. Female adults were far less likely to take a blood meal when cold acclimated, and exposing females to blood (without feeding) attenuated some of the beneficial effects of cold acclimation on CCRT. Lastly, larvae suffered from haemolymph hyperkalaemia when chilled, but cold acclimation attenuated the imbalance. Our results demonstrate that A. aegypti larvae and adults have the capacity to acclimate to low temperatures, and do so at least in part by better maintaining ion balance in the cold. This ability for cold acclimation may facilitate the spread of this species to higher latitudes, particularly in an era of climate change.
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Affiliation(s)
- Amanda Jass
- Department of Biology, York University, Toronto, ON, Canada M3J 1P3
| | - Gil Y Yerushalmi
- Department of Biology, York University, Toronto, ON, Canada M3J 1P3
| | - Hannah E Davis
- Department of Biology, Carleton University, Ottawa, ON, Canada K1S 5B6
| | - Andrew Donini
- Department of Biology, York University, Toronto, ON, Canada M3J 1P3
| | - Heath A MacMillan
- Department of Biology, Carleton University, Ottawa, ON, Canada K1S 5B6
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Davis HE, Miller SL, Case EM, Leach JK. Supplementation of fibrin gels with sodium chloride enhances physical properties and ensuing osteogenic response. Acta Biomater 2011; 7:691-9. [PMID: 20837168 DOI: 10.1016/j.actbio.2010.09.007] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 08/11/2010] [Accepted: 09/07/2010] [Indexed: 02/01/2023]
Abstract
Modifying the relative concentrations of fibrinogen and thrombin can control the physical properties of fibrin gels, while the viability of associated cells has been linked to the gel's final network structure. It was hypothesized that increasing the gel ionic strength during fabrication through supplementation with sodium chloride (NaCl) would provide an improved approach for tailoring the physical properties of fibrin gels and maintaining the viability and osteogenic potential of entrapped cells. Fibrin gels were formed by mixing fibrinogen, thrombin and calcium chloride with varying masses of NaCl (0-4.40% w/v), and the osteogenic potential of entrapped human mesenchymal stem cells (MSC) was examined over 14 days. Physical properties including gelation time, compressive modulus and fiber diameter were dependent upon NaCl content, with gels containing 2.60% NaCl possessing compressive moduli threefold higher than gels without NaCl. Alkaline phosphatase activity was highest for MSC entrapped in gels containing 2.15-2.60% NaCl after 14 days, and all gels exhibited increased calcium incorporation over the culture period. These data confirm that varying the salt concentration of the pre-gel solution can modulate the material properties of fibrin constructs without additional fibrinogen or thrombin, thereby offering a new approach for generating improved cell transplantation vehicles for use in bone tissue regeneration.
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Affiliation(s)
- H E Davis
- Department of Biomedical Engineering, UC Davis, Davis, CA 95616, USA
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Andreadis S, Lavery T, Davis HE, Le Doux JM, Yarmush ML, Morgan JR. Toward a more accurate quantitation of the activity of recombinant retroviruses: alternatives to titer and multiplicity of infection. J Virol 2000; 74:3431-9. [PMID: 10755888 PMCID: PMC111849 DOI: 10.1128/jvi.74.7.3431-3431.2000] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.0] [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
In this paper, we present a mathematical model with experimental support of how several key parameters govern the adsorption of active retrovirus particles onto the surface of adherent cells. These parameters, including time of adsorption, volume of virus, and the number, size, and type of target cells, as well as the intrinsic properties of the virus, diffusion coefficient, and half-life (t1/2), have been incorporated into a mathematical expression that describes the rate at which active virus particles adsorb to the cell surface. From this expression, we have obtained estimates of Cvo, the starting concentration of active retrovirus particles. In contrast to titer, Cvo is independent of the specific conditions of the assay. The relatively slow diffusion (D = 2 x 10(-8) cm2/s) and rapid decay (t1/2 = 6 to 7 h) of retrovirus particles explain why Cvo values are significantly higher than titer values. Values of Cvo also indicate that the number of defective particles in a retrovirus stock is much lower than previously thought, which has implications especially for the use of retroviruses for in vivo gene therapy. With this expression, we have also computed AVC (active viruses/cell), the number of active retrovirus particles that would adsorb per cell during a given adsorption time. In contrast to multiplicity of infection, which is based on titer and is subject to the same inaccuracies, AVC is based on the physicochemical parameters of the transduction assay and so is a more reliable alternative.
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Affiliation(s)
- S Andreadis
- Center for Engineering in Medicine and Surgical Services, Massachusetts General Hospital, Harvard Medical School, Boston 02114, USA
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Andreadis S, Lavery T, Davis HE, Le Doux JM, Yarmush ML, Morgan JR. Toward a more accurate quantitation of the activity of recombinant retroviruses: alternatives to titer and multiplicity of infection. J Virol 2000; 74:1258-66. [PMID: 10627536 PMCID: PMC111460 DOI: 10.1128/jvi.74.3.1258-1266.2000] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [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
In this paper, we present a mathematical model with experimental support of how several key parameters govern the adsorption of active retrovirus particles onto the surface of adherent cells. These parameters, including time of adsorption, volume of virus, and the number, size, and type of target cells, as well as the intrinsic properties of the virus, diffusion coefficient, and half-life (t(1/2)), have been incorporated into a mathematical expression that describes the rate at which active virus particles adsorb to the cell surface. From this expression, we have obtained estimates of C(vo), the starting concentration of active retrovirus particles. In contrast to titer, C(vo) is independent of the specific conditions of the assay. The relatively slow diffusion (D = 2 x 10(-8) cm(2)/s) and rapid decay (t(1/2) = 6 to 7 h) of retrovirus particles explain why C(vo) values are significantly higher than titer values. Values of C(vo) also indicate that the number of defective particles in a retrovirus stock is much lower than previously thought, which has implications especially for the use of retroviruses for in vivo gene therapy. With this expression, we have also computed AVC (active viruses/cell), the number of active retrovirus particles that would adsorb per cell during a given adsorption time. In contrast to multiplicity of infection, which is based on titer and is subject to the same inaccuracies, AVC is based on the physicochemical parameters of the transduction assay and so is a more reliable alternative.
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Affiliation(s)
- S Andreadis
- Center for Engineering in Medicine and Surgical Services, Massachusetts General Hospital, Harvard Medical School, and Shriners Hospital for Children, Boston, Massachusetts 02114, USA
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Le Doux JM, Davis HE, Morgan JR, Yarmush ML. Kinetics of retrovirus production and decay. Biotechnol Bioeng 1999; 63:654-62. [PMID: 10397822] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
There has been only limited success in using recombinant retroviruses to transfer genes for the purposes of human gene therapy, in part because the average number of genes delivered to the target cells (transduction efficiency) is often too low to achieve the desired therapeutic effect [Miller, AD. 1990. Blood 76:271-278; Mulligan RC. 1993. Science 260:926-932; Orkin SH, Motulsky AG. 1995. Report and recommendations of the panel to assess the NIH investment in research on gene therapy. Bethesda, MD: National Institutes of Health.]. One strategy to improve transduction efficiency is to focus on understanding and improving the processes used to produce recombinant retroviruses. In this report, we characterized the dynamics of retrovirus production and decay in batch cultures of virus producer cells using a simple mathematical model, a recombinant retrovirus encoding the Escherichia coli lacZ gene, and quantitative assays for virus activity and number. We found that the rate at which recombinant retroviruses spontaneously lose their activity (decay) is a strong function of temperature, decreasing roughly 2-fold for every 5 degrees C reduction in temperature, whereas the rate at which retroviruses are produced is only weakly affected by temperature, decreasing about 10% for every 5 degrees C reduction in temperature. In addition, we developed a simple mathematical model of virus production and decay that predicted that the virus titer in batch cultures of virus producer cells would reach a maximum steady-state at a rate that is inversely proportional to the virus decay rate and to a level that is proportional to the ratio of the virus production rate to the virus decay rate. Consistent with the model, we observed that the steady-state levels of virus titer increased more than 3-fold when the cell culture temperature was reduced from 37 to 28 degrees C. Despite their higher titers, virus stocks produced at 28 degrees C, when used in undiluted form so as to mimic human gene transfer protocols, did not transduce substantially more cells than virus stocks produced at 37 degrees C. The implications of our findings on the production of retroviruses for use in human gene therapy protocols are discussed.
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Affiliation(s)
- J M Le Doux
- The Center for Engineering in Medicine, and Surgical Services, Massachusetts General Hospital, Harvard Medical School, and the Shriners Burns Hospital, Boston, Massachusetts 02114, USA
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Butler DF, Hough DR, Friedman SJ, Davis HE. Adult Kawasaki syndrome. Arch Dermatol 1987; 123:1356-61. [PMID: 3662568] [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: 01/06/2023]
Abstract
Kawasaki syndrome (KS) is an idiopathic, acute, febrile, exanthemous illness that primarily affects infants and children. We describe a 20-year-old black woman who fulfilled the clinical criteria for the diagnosis of KS and excluded other possible causes. In addition, we reviewed data on 21 patients with adult KS reported in the English literature and accepted ten cases as representing this syndrome. The epidemiologic, clinical, laboratory, and pathologic features of the 11 cases representing adult KS are discussed. Although the initial reports of adult KS in the United States may have actually represented toxic shock syndrome, the occurrence of KS in adults should be acknowledged.
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Affiliation(s)
- D F Butler
- Dermatology, Service, William Beaumont Army Medical Center, El Paso, Tex. 79920-5001
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Davis HE. The CSITM Crofilcon A, a membrane lens for aphakic extended wear. J Am Optom Assoc 1980; 51:217-20. [PMID: 7372981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The advent of aphakic extended wear lenses provides an important new alternative to the contact lens practitioner. This paper reports experiences with the CSI aphakic extended wear lens, a thin hydrogel lens designed according to a membrane concept.
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Davis HE. Contact lenses -- past, present, future. J Am Optom Assoc 1979; 50:278. [PMID: 448004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Davis HE, Dimopoullos GT, Roby TO. Anaplasmosis transmission: inoculation by the ocular route. Res Vet Sci 1970; 11:594-5. [PMID: 5498579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Davis HE, Dimopoullos GT. Infectivity of Anaplasma marginale: effects of hydrogen-ion concentration on washed infected erythrocytes and partially pruified anaplasma bodies. Am J Vet Res 1969; 30:167-70. [PMID: 5374524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Davis HE, Dimopoullos GT. Effects of washing with saline solution and normal bovine plasma on the infectivity of Anaplasma marginale erythrocytes. Am J Vet Res 1968; 29:763-4. [PMID: 5640316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Davis HE. Publicity campaign stimulates interest in nursing careers. Hospitals 1966; 40:69-70. [PMID: 5929619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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