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2. An early warning system for emerging SARS-CoV-2 variants

Author

Lorenzo Subissi, Anne von Gottberg, Lipi Thukral, Nathalie Worp, Bas B. Oude Munnink, Surabhi Rathore, Laith J. Abu-Raddad, Ximena Aguilera, Erik Alm, Brett N. Archer, Homa Attar Cohen, Amal Barakat, Wendy S. Barclay, Jinal N. Bhiman, Leon Caly, Meera Chand, Mark Chen, Ann Cullinane, Tulio de Oliveira, Christian Drosten, Julian Druce, Paul Effler, Ihab El Masry, Adama Faye, Simani Gaseitsiwe, Elodie Ghedin, Rebecca Grant, Bart L. Haagmans, Belinda L. Herring, Shilpa S. Iyer, Zyleen Kassamali, Manish Kakkar, Rebecca J. Kondor, Juliana A. Leite, Yee-Sin Leo, Gabriel M. Leung, Marco Marklewitz, Sikhulile Moyo, Jairo Mendez-Rico, Nada M. Melhem, Vincent Munster, Karen Nahapetyan, Djin-Ye Oh, Boris I. Pavlin, Thomas P. Peacock, Malik Peiris, Zhibin Peng, Leo L. M. Poon, Andrew Rambaut, Jilian Sacks, Yinzhong Shen, Marilda M. Siqueira, Sofonias K. Tessema, Erik M. Volz, Volker Thiel, Sylvie van der Werf, Sylvie Briand, Mark D. Perkins, Maria D. Van Kerkhove, Marion P. G. Koopmans, Anurag Agrawal, World Health Organisation (WHO), Organisation Mondiale de la Santé / World Health Organization Office (OMS / WHO), National Institute for Communicable Diseases [Johannesburg] (NICD), University of the Witwatersrand [Johannesburg] (WITS), Central Scientific Instruments Organisation (CSIR), Erasmus University Medical Center [Rotterdam] (Erasmus MC), Weill Cornell Medicine [Qatar], Universidad del Desarollo [Santiago, Chile] (UDD), European Centre for Disease Prevention and Control [Stockholm, Sweden] (ECDC), WHO - Regional Office for the Eastern Mediterranean [Cairo, Egypt] (EMRO), Imperial College London, Victorian Infectious Diseases Reference Laboratory [Melbourne, Australia] (VIDRL), UK Health Security Agency [London] (UKHSA), World Organisation for Animal Health (WOAH), Stellenbosch University, Charité - UniversitätsMedizin = Charité - University Hospital [Berlin], German Center for Infection Research, Partnersite Munich (DZIF), The University of Western Australia (UWA), Food and Agriculture Organization of the United Nations [Rome, Italie] (FAO), Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Botswana Harvard AIDS Institute Partnership, Harvard T.H. Chan School of Public Health, National Institute of Allergy and Infectious Diseases [Bethesda] (NIAID-NIH), National Institutes of Health [Bethesda] (NIH), World Health Organization [Kinshasa, Democratic Republic of Congo] (WHO-DRC), United States Centers for Disease Control and Prevention, The University of Hong Kong (HKU), American University of Beirut [Beyrouth] (AUB), Robert Koch Institute [Berlin] (RKI), Chinese Center for Disease Control and Prevention, University of Edinburgh, Fudan University [Shanghai], Instituto Oswaldo Cruz / Oswaldo Cruz Institute [Rio de Janeiro] (IOC), Fundação Oswaldo Cruz / Oswaldo Cruz Foundation (FIOCRUZ), Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), Centers for Disease Control and Prevention [Pretoria, South Africa] (CDC-South Africa), Centers for Disease Control and Prevention (CDC), University of Bern, Génétique Moléculaire des Virus à ARN - Molecular Genetics of RNA Viruses (GMV-ARN (UMR_3569 / U-Pasteur_2)), Institut Pasteur [Paris] (IP)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Centre National de Référence des virus des infections respiratoires (dont la grippe) - National Reference Center Virus Influenzae [Paris] (CNR - laboratoire coordonnateur), Institut Pasteur [Paris] (IP)-Université Paris Cité (UPCité), Ashoka University, We acknowledge scientists, public health professionals and Ministries of Health across the world for early generation and sharing of data on SARS-CoV-2 variants., and Virology

Subjects
630 Agriculture, SARS-CoV-2, [SDV]Life Sciences [q-bio], COVID-19, Humans, General Medicine, General Biochemistry, Genetics and Molecular Biology
Abstract

International audience

Published
2022
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5. Point-of-care HIV viral load testing: An essential tool for a sustainable global HIV/AIDS response

Author

Jilian Sacks, Anna Bershteyn, Lorraine Lillis, Francesco Marinucci, Paul K. Drain, Andrew T. Bender, Jonathan D. Posner, Jienchi Dorward, Nigel Garrett, and David S. Boyle

Subjects
Microbiology (medical), medicine.medical_specialty, Epidemiology, Population, Human immunodeficiency virus (HIV), HIV Infections, Review, Global Health, medicine.disease_cause, Turnaround time, Acquired immunodeficiency syndrome (AIDS), Health care, medicine, Humans, Intensive care medicine, education, Point of care, Acquired Immunodeficiency Syndrome, education.field_of_study, General Immunology and Microbiology, business.industry, Public health, Public Health, Environmental and Occupational Health, Disease Management, virus diseases, Viral Load, medicine.disease, Infectious Diseases, Point-of-Care Testing, business, Viral load
Abstract

The global public health community has set ambitious treatment targets to end the HIV/AIDS pandemic. With the notable absence of a cure, the goal of HIV treatment is to achieve sustained suppression of an HIV viral load, which allows for immunological recovery and reduces the risk of onward HIV transmission. Monitoring HIV viral load in people living with HIV is therefore central to maintaining effective individual antiretroviral therapy as well as monitoring progress toward achieving population targets for viral suppression. The capacity for laboratory-based HIV viral load testing has increased rapidly in low- and middle-income countries, but implementation of universal viral load monitoring is still hindered by several barriers and delays. New devices for point-of-care HIV viral load testing may be used near patients to improve HIV management by reducing the turnaround time for clinical test results. The implementation of near-patient testing using these new and emerging technologies may be an essential tool for ensuring a sustainable response that will ultimately enable an end to the HIV/AIDS pandemic. In this report, we review the current and emerging technology, the evidence for decentralized viral load monitoring by non-laboratory health care workers, and the additional considerations for expanding point-of-care HIV viral load testing.

Published
2019

6. Dissociating markers of senescence and protective ability in memory T cells (110.16)

Author

Martin Prlic, Jilian Sacks, and Michael Bevan

Subjects
Immunology, Immunology and Allergy
Abstract

A set of surface markers is commonly used to predict the potential of CD8 effector T cells to differentiate into memory cells. Similarly, these surface markers together with TNF family member CD27 are frequently used to predict a memory T cell’s ability to mount a recall response. Expression of these markers changes every time a memory cell is stimulated and repeated stimulation can lead to T cell senescence and loss of memory T cell responsiveness. This is a concern for prime-boost vaccine strategies which repeatedly stimulate T cells to increase memory T cell frequency. The molecular cues that cause senescence are still unknown, but cell division history is likely to play a major role. We sought to dissect the roles of inflammation and cell division history in developing T cell senescence and their impact on the expression pattern of commonly used markers of senescence. We developed a system that allows priming of CD8 T cells with minimal inflammation and without acquisition of maximal effector function, such as granzyme expression, but a cell division history similar to priming with systemic inflammation. Memory cells derived from minimal effector T cells are fully functional upon rechallenge, have full access to non-lymphoid tissue and appear to be less senescent by phenotype upon rechallenge. However, these currently used biomarkers to measure senescence do not predict proliferative potential or protective ability, but merely reflect initial priming conditions.

Published
2012
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