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  1. Article: Insulin Dosing and Glycemic Outcomes Among Steroid-treated Hospitalized Patients.

    Bajaj, Mira A / Zale, Andrew D / Morgenlander, William R / Abusamaan, Mohammed S / Mathioudakis, Nestoras

    Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists

    2022  Volume 28, Issue 8, Page(s) 774–779

    Abstract: Objective: To determine the optimal insulin-to-steroid dose ratio for the attainment of glycemic control in hospitalized patients.: Methods: We retrospectively studied data collected from the electronic health records within an academic medical ... ...

    Abstract Objective: To determine the optimal insulin-to-steroid dose ratio for the attainment of glycemic control in hospitalized patients.
    Methods: We retrospectively studied data collected from the electronic health records within an academic medical center from 18 599 patient-days where patients were treated concurrently with insulin and steroids. Multivariate logistic regression analyses, which included demographic and clinical variables, were performed to assess the relationships between the exposures of total and basal insulin-to-steroid ratios and the outcomes of glycemic control (all blood glucose readings on the following patient-day were >70 and ≤180 mg/dL) and hypoglycemia within 3 subgroups of steroid dosing: low (≤10-mg prednisone equivalent dose [PED]), medium (from >10-mg to ≤40-mg PED), and high (>40-mg PED).
    Results: Increased insulin-to-steroid ratio was associated with increased odds of both glycemic control and hypoglycemia. The optimal total insulin-to-steroid ratio for attaining glycemic control was 0.294 U/kg/10-mg PED in the low-dose subgroup, 0.257 U/kg/10-mg PED in the medium-dose subgroup, and 0.085 U/kg/10-mg PED in the high-dose subgroup. The optimal basal insulin-to-steroid ratio was 0.215 U/kg/10-mg PED in the low-dose subgroup, 0.126 U/kg/10-mg PED in the medium-dose subgroup, and 0.036 U/kg/10-mg PED in the high-dose subgroup.
    Conclusion: Increasing insulin-to-steroid ratios are positively associated with glycemic control and hypoglycemia. Our study suggests that approximately 0.3 U/kg/10-mg PED is an optimal dose for low- and medium-dose steroids, whereas approximately 0.1 U/kg/10-mg PED is an optimal dose for high-dose steroids. Further prospective studies are needed to identify insulin regimens that will optimize glycemic control in steroid-treated patients while minimizing the risk of hypoglycemia.
    MeSH term(s) Blood Glucose ; Humans ; Hyperglycemia/drug therapy ; Hyperglycemia/prevention & control ; Hypoglycemia/chemically induced ; Hypoglycemia/epidemiology ; Hypoglycemic Agents ; Inpatients ; Insulin ; Insulin, Regular, Human/therapeutic use ; Retrospective Studies ; Steroids/therapeutic use
    Chemical Substances Blood Glucose ; Hypoglycemic Agents ; Insulin ; Insulin, Regular, Human ; Steroids
    Language English
    Publishing date 2022-05-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1473503-9
    ISSN 1530-891X
    ISSN 1530-891X
    DOI 10.1016/j.eprac.2022.05.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Efficient encoding of large antigenic spaces by epitope prioritization with Dolphyn.

    Liebhoff, Anna-Maria / Venkataraman, Thiagarajan / Morgenlander, William R / Na, Miso / Kula, Tomasz / Waugh, Kathleen / Morrison, Charles / Rewers, Marian / Longman, Randy / Round, June / Elledge, Stephen / Ruczinski, Ingo / Langmead, Ben / Larman, H Benjamin

    Nature communications

    2024  Volume 15, Issue 1, Page(s) 1577

    Abstract: We investigate a relatively underexplored component of the gut-immune axis by profiling the antibody response to gut phages using Phage Immunoprecipitation Sequencing (PhIP-Seq). To cover large antigenic spaces, we develop Dolphyn, a method that uses ... ...

    Abstract We investigate a relatively underexplored component of the gut-immune axis by profiling the antibody response to gut phages using Phage Immunoprecipitation Sequencing (PhIP-Seq). To cover large antigenic spaces, we develop Dolphyn, a method that uses machine learning to select peptides from protein sets and compresses the proteome through epitope-stitching. Dolphyn compresses the size of a peptide library by 78% compared to traditional tiling, increasing the antibody-reactive peptides from 10% to 31%. We find that the immune system develops antibodies to human gut bacteria-infecting viruses, particularly E.coli-infecting Myoviridae. Cost-effective PhIP-Seq libraries designed with Dolphyn enable the assessment of a wider range of proteins in a single experiment, thus facilitating the study of the gut-immune axis.
    MeSH term(s) Humans ; Epitopes ; Amino Acid Sequence ; Peptide Library ; Peptides/genetics ; Antibodies ; Bacteriophages/genetics ; Epitope Mapping/methods
    Chemical Substances Epitopes ; Peptide Library ; Peptides ; Antibodies
    Language English
    Publishing date 2024-02-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-024-45601-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Efficient encoding of large antigenic spaces by epitope prioritization with Dolphyn.

    Liebhoff, Anna-Maria / Venkataraman, Thiagarajan / Morgenlander, William R / Na, Miso / Kula, Tomasz / Waugh, Kathleen / Morrison, Charles / Rewers, Marian / Longman, Randy / Round, June / Elledge, Stephen / Ruczinski, Ingo / Langmead, Ben / Larman, H Benjamin

    bioRxiv : the preprint server for biology

    2023  

    Abstract: We investigated a relatively underexplored component of the gut-immune axis by profiling the antibody response to gut phages using Phage Immunoprecipitation Sequencing (PhIP-Seq). To enhance this approach, we developed Dolphyn, a novel method that uses ... ...

    Abstract We investigated a relatively underexplored component of the gut-immune axis by profiling the antibody response to gut phages using Phage Immunoprecipitation Sequencing (PhIP-Seq). To enhance this approach, we developed Dolphyn, a novel method that uses machine learning to select peptides from protein sets and compresses the proteome through epitope-stitching. Dolphyn improves the fraction of gut phage library peptides bound by antibodies from 10% to 31% in healthy individuals, while also reducing the number of synthesized peptides by 78%. In our study on gut phages, we discovered that the immune system develops antibodies to bacteria-infecting viruses in the human gut, particularly
    Language English
    Publishing date 2023-07-31
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.07.30.551179
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Epitope Mapping of SARS-CoV-2 Spike Antibodies in Vaccinated Kidney Transplant Recipients Reveals Poor Spike Coverage Compared to Healthy Controls.

    Karaba, Andrew H / Morgenlander, William R / Johnston, Trevor S / Hage, Camille / Pekosz, Andrew / Durand, Christine M / Segev, Dorry L / Robien, Mark A / Heeger, Peter S / Larsen, Christian P / Blankson, Joel N / Werbel, William A / Larman, H Benjamin / Tobian, Aaron A R

    The Journal of infectious diseases

    2023  

    Abstract: Kidney transplant recipients (KTRs) develop decreased antibody titers to SARS-CoV-2 vaccination compared to healthy controls (HCs), but whether KTRs generate antibodies against key epitopes associated with neutralization is unknown. Plasma from 78 KTRs ... ...

    Abstract Kidney transplant recipients (KTRs) develop decreased antibody titers to SARS-CoV-2 vaccination compared to healthy controls (HCs), but whether KTRs generate antibodies against key epitopes associated with neutralization is unknown. Plasma from 78 KTRs from a clinical trial of third doses of SARS-CoV-2 vaccines and 12 HCs underwent phage display immunoprecipitation and sequencing (PhIP-Seq) to map antibody responses against SARS-CoV-2. KTRs had lower antibody reactivity to SARS-CoV-2 than HCs, but KTRs and HCs recognized similar epitopes associated with neutralization. Thus, epitope gaps in antibody breadth of KTRs are unlikely responsible for decreased efficacy of SARS-CoV-2 vaccines in this immunosuppressed population.
    Language English
    Publishing date 2023-11-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3019-3
    ISSN 1537-6613 ; 0022-1899
    ISSN (online) 1537-6613
    ISSN 0022-1899
    DOI 10.1093/infdis/jiad534
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Unbiased discovery of autoantibodies associated with severe COVID-19 via genome-scale self-assembled DNA-barcoded protein libraries.

    Credle, Joel J / Gunn, Jonathan / Sangkhapreecha, Puwanat / Monaco, Daniel R / Zheng, Xuwen Alice / Tsai, Hung-Ji / Wilbon, Azaan / Morgenlander, William R / Rastegar, Andre / Dong, Yi / Jayaraman, Sahana / Tosi, Lorenzo / Parekkadan, Biju / Baer, Alan N / Roederer, Mario / Bloch, Evan M / Tobian, Aaron A R / Zyskind, Israel / Silverberg, Jonathan I /
    Rosenberg, Avi Z / Cox, Andrea L / Lloyd, Tom / Mammen, Andrew L / Benjamin Larman, H

    Nature biomedical engineering

    2022  Volume 6, Issue 8, Page(s) 992–1003

    Abstract: Pathogenic autoreactive antibodies that may be associated with life-threatening coronavirus disease 2019 (COVID-19) remain to be identified. Here, we show that self-assembled genome-scale libraries of full-length proteins covalently coupled to unique DNA ...

    Abstract Pathogenic autoreactive antibodies that may be associated with life-threatening coronavirus disease 2019 (COVID-19) remain to be identified. Here, we show that self-assembled genome-scale libraries of full-length proteins covalently coupled to unique DNA barcodes for analysis by sequencing can be used for the unbiased identification of autoreactive antibodies in plasma samples. By screening 11,076 DNA-barcoded proteins expressed from a sequence-verified human ORFeome library, the method, which we named MIPSA (for Molecular Indexing of Proteins by Self-Assembly), allowed us to detect circulating neutralizing type-I and type-III interferon (IFN) autoantibodies in five plasma samples from 55 patients with life-threatening COVID-19. In addition to identifying neutralizing type-I IFN-α and IFN-ω autoantibodies and other previously known autoreactive antibodies in patient plasma, MIPSA enabled the detection of as yet unidentified neutralizing type-III anti-IFN-λ3 autoantibodies that were not seen in healthy plasma samples or in convalescent plasma from ten non-hospitalized individuals with COVID-19. The low cost and simple workflow of MIPSA will facilitate unbiased high-throughput analyses of protein-antibody, protein-protein and protein-small-molecule interactions.
    MeSH term(s) Autoantibodies ; COVID-19/therapy ; Gene Library ; Humans ; Immunization, Passive ; Interferon-alpha ; COVID-19 Serotherapy
    Chemical Substances Autoantibodies ; Interferon-alpha
    Language English
    Publishing date 2022-08-19
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural ; Research Support, N.I.H., Intramural
    ISSN 2157-846X
    ISSN (online) 2157-846X
    DOI 10.1038/s41551-022-00925-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Comprehensive profiling of pre-infection antibodies identifies HIV targets associated with viremic control and viral load.

    Grant-McAuley, Wendy / Morgenlander, William / Hudelson, Sarah E / Thakar, Manjusha / Piwowar-Manning, Estelle / Clarke, William / Breaud, Autumn / Blankson, Joel / Wilson, Ethan / Ayles, Helen / Bock, Peter / Moore, Ayana / Kosloff, Barry / Shanaube, Kwame / Meehan, Sue-Ann / van Deventer, Anneen / Fidler, Sarah / Hayes, Richard / Ruczinski, Ingo /
    Kammers, Kai / Laeyendecker, Oliver / Larman, H Benjamin / Eshleman, Susan H

    Frontiers in immunology

    2023  Volume 14, Page(s) 1178520

    Abstract: Background: High HIV viral load (VL) is associated with increased transmission risk and faster disease progression. HIV controllers achieve viral suppression without antiretroviral (ARV) treatment. We evaluated viremic control in a community-randomized ... ...

    Abstract Background: High HIV viral load (VL) is associated with increased transmission risk and faster disease progression. HIV controllers achieve viral suppression without antiretroviral (ARV) treatment. We evaluated viremic control in a community-randomized trial with >48,000 participants.
    Methods: A massively multiplexed antibody profiling system, VirScan, was used to quantify pre- and post-infection antibody reactivity to HIV peptides in 664 samples from 429 participants (13 controllers, 135 viremic non-controllers, 64 other non-controllers, 217 uninfected persons). Controllers had VLs <2,000 copies/mL with no ARV drugs detected at the first HIV-positive visit and one year later. Viremic non-controllers had VLs 2,000 copies/mL with no ARV drugs detected at the first HIV-positive visit. Other non-controllers had either ARV drugs detected at the first HIV-positive visit (n=47) or VLs <2,000 copies/mL with no ARV drugs detected at only one HIV-positive visit (n=17).
    Results: We identified pre-infection HIV antibody reactivities that correlated with post-infection VL. Pre-infection reactivity to an epitope in the HR2 domain of gp41 was associated with controller status and lower VL. Pre-infection reactivity to an epitope in the C2 domain of gp120 was associated with non-controller status and higher VL. Different patterns of antibody reactivity were observed over time for these two epitopes.
    Conclusion: These studies suggest that pre-infection HIV antibodies are associated with controller status and modulation of HIV VL. These findings may inform research on antibody-based interventions for HIV treatment.
    MeSH term(s) Humans ; Viral Load ; HIV Antibodies ; Anti-Retroviral Agents/therapeutic use ; Epitopes ; Viremia/drug therapy ; HIV-1 ; HIV Infections/drug therapy
    Chemical Substances HIV Antibodies ; Anti-Retroviral Agents ; Epitopes
    Language English
    Publishing date 2023-09-06
    Publishing country Switzerland
    Document type Randomized Controlled Trial ; Journal Article ; Research Support, N.I.H., Intramural ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2023.1178520
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Neutralizing IFNL3 Autoantibodies in Severe COVID-19 Identified Using Molecular Indexing of Proteins by Self-Assembly.

    Credle, Joel J / Gunn, Jonathan / Sangkhapreecha, Puwanat / Monaco, Daniel R / Zheng, Xuwen Alice / Tsai, Hung-Ji / Wilbon, Azaan / Morgenlander, William R / Dong, Yi / Jayaraman, Sahana / Tosi, Lorenzo / Parekkadan, Biju / Baer, Alan N / Roederer, Mario / Bloch, Evan M / Tobian, Aaron A R / Zyskind, Israel / Silverberg, Jonathan I / Rosenberg, Avi Z /
    Cox, Andrea L / Lloyd, Tom / Mammen, Andrew L / Larman, H Benjamin

    bioRxiv : the preprint server for biology

    2021  

    Abstract: Unbiased antibody profiling can identify the targets of an immune reaction. A number of likely pathogenic autoreactive antibodies have been associated with life-threatening SARS-CoV-2 infection; yet, many additional autoantibodies likely remain unknown. ... ...

    Abstract Unbiased antibody profiling can identify the targets of an immune reaction. A number of likely pathogenic autoreactive antibodies have been associated with life-threatening SARS-CoV-2 infection; yet, many additional autoantibodies likely remain unknown. Here we present Molecular Indexing of Proteins by Self Assembly (MIPSA), a technique that produces ORFeome-scale libraries of proteins covalently coupled to uniquely identifying DNA barcodes for analysis by sequencing. We used MIPSA to profile circulating autoantibodies from 55 patients with severe COVID-19 against 11,076 DNA-barcoded proteins of the human ORFeome library. MIPSA identified previously known autoreactivities, and also detected undescribed neutralizing interferon lambda 3 (IFN-λ3) autoantibodies. At-risk individuals with anti- IFN-λ3 antibodies may benefit from interferon supplementation therapies, such as those currently undergoing clinical evaluation.
    Language English
    Publishing date 2021-03-03
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2021.03.02.432977
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Antibody responses to endemic coronaviruses modulate COVID-19 convalescent plasma functionality.

    Morgenlander, William R / Henson, Stephanie N / Monaco, Daniel R / Chen, Athena / Littlefield, Kirsten / Bloch, Evan M / Fujimura, Eric / Ruczinski, Ingo / Crowley, Andrew R / Natarajan, Harini / Butler, Savannah E / Weiner, Joshua A / Li, Mamie Z / Bonny, Tania S / Benner, Sarah E / Balagopal, Ashwin / Sullivan, David / Shoham, Shmuel / Quinn, Thomas C /
    Eshleman, Susan H / Casadevall, Arturo / Redd, Andrew D / Laeyendecker, Oliver / Ackerman, Margaret E / Pekosz, Andrew / Elledge, Stephen J / Robinson, Matthew / Tobian, Aaron Ar / Larman, H Benjamin

    The Journal of clinical investigation

    2022  Volume 131, Issue 7

    Abstract: SARS-CoV-2 (CoV2) antibody therapies, including COVID-19 convalescent plasma (CCP), monoclonal antibodies, and hyperimmune globulin, are among the leading treatments for individuals with early COVID-19 infection. The functionality of convalescent plasma ... ...

    Abstract SARS-CoV-2 (CoV2) antibody therapies, including COVID-19 convalescent plasma (CCP), monoclonal antibodies, and hyperimmune globulin, are among the leading treatments for individuals with early COVID-19 infection. The functionality of convalescent plasma varies greatly, but the association of antibody epitope specificities with plasma functionality remains uncharacterized. We assessed antibody functionality and reactivities to peptides across the CoV2 and the 4 endemic human coronavirus (HCoV) genomes in 126 CCP donations. We found strong correlation between plasma functionality and polyclonal antibody targeting of CoV2 spike protein peptides. Antibody reactivity to many HCoV spike peptides also displayed strong correlation with plasma functionality, including pan-coronavirus cross-reactive epitopes located in a conserved region of the fusion peptide. After accounting for antibody cross-reactivity, we identified an association between greater alphacoronavirus NL63 antibody responses and development of highly neutralizing antibodies against CoV2. We also found that plasma preferentially reactive to the CoV2 spike receptor binding domain (RBD), versus the betacoronavirus HKU1 RBD, had higher neutralizing titer. Finally, we developed a 2-peptide serosignature that identifies plasma donations with high anti-spike titer, but that suffer from low neutralizing activity. These results suggest that analysis of coronavirus antibody fine specificities may be useful for selecting desired therapeutics and understanding the complex immune responses elicited by CoV2 infection.
    MeSH term(s) Antibodies, Neutralizing/blood ; Antibodies, Viral/blood ; Antibody Specificity ; COVID-19/immunology ; COVID-19/therapy ; COVID-19/virology ; Coronavirus/classification ; Coronavirus/genetics ; Coronavirus/immunology ; Cross Reactions ; Endemic Diseases ; Genome, Viral ; Humans ; Immunization, Passive ; Immunodominant Epitopes/chemistry ; Immunodominant Epitopes/genetics ; Immunodominant Epitopes/immunology ; Models, Molecular ; Pandemics ; SARS-CoV-2/genetics ; SARS-CoV-2/immunology ; Species Specificity ; Spike Glycoprotein, Coronavirus/chemistry ; Spike Glycoprotein, Coronavirus/genetics ; Spike Glycoprotein, Coronavirus/immunology
    Chemical Substances Antibodies, Neutralizing ; Antibodies, Viral ; Immunodominant Epitopes ; Spike Glycoprotein, Coronavirus ; spike protein, SARS-CoV-2
    Language English
    Publishing date 2022-08-31
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 3067-3
    ISSN 1558-8238 ; 0021-9738
    ISSN (online) 1558-8238
    ISSN 0021-9738
    DOI 10.1172/JCI146927
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Pharmacokinetics of high-titer anti-SARS-CoV-2 human convalescent plasma in high-risk children.

    Gordon, Oren / Brosnan, Mary Katherine / Yoon, Steve / Jung, Dawoon / Littlefield, Kirsten / Ganesan, Abhinaya / Caputo, Christopher A / Li, Maggie / Morgenlander, William R / Henson, Stephanie N / Ordonez, Alvaro A / De Jesus, Patricia / Tucker, Elizabeth W / Peart Akindele, Nadine / Ma, Zexu / Wilson, Jo / Ruiz-Bedoya, Camilo A / Younger, M Elizabeth M / Bloch, Evan M /
    Shoham, Shmuel / Sullivan, David / Tobian, Aaron Ar / Cooke, Kenneth R / Larman, Ben / Gobburu, Jogarao Vs / Casadevall, Arturo / Pekosz, Andrew / Lederman, Howard M / Klein, Sabra L / Jain, Sanjay K

    JCI insight

    2022  Volume 7, Issue 2

    Abstract: BACKGROUNDWhile most children who contract COVID-19 experience mild disease, high-risk children with underlying conditions may develop severe disease, requiring interventions. Kinetics of antibodies transferred via COVID-19 convalescent plasma early in ... ...

    Abstract BACKGROUNDWhile most children who contract COVID-19 experience mild disease, high-risk children with underlying conditions may develop severe disease, requiring interventions. Kinetics of antibodies transferred via COVID-19 convalescent plasma early in disease have not been characterized.METHODSIn this study, high-risk children were prospectively enrolled to receive high-titer COVID-19 convalescent plasma (>1:320 anti-spike IgG; Euroimmun). Passive transfer of antibodies and endogenous antibody production were serially evaluated for up to 2 months after transfusion. Commercial and research ELISA assays, virus neutralization assays, high-throughput phage-display assay utilizing a coronavirus epitope library, and pharmacokinetic analyses were performed.RESULTSFourteen high-risk children (median age, 7.5 years) received high-titer COVID-19 convalescent plasma, 9 children within 5 days (range, 2-7 days) of symptom onset and 5 children within 4 days (range, 3-5 days) after exposure to SARS-CoV-2. There were no serious adverse events related to transfusion. Antibodies against SARS-CoV-2 were transferred from the donor to the recipient, but antibody titers declined by 14-21 days, with a 15.1-day half-life for spike protein IgG. Donor plasma had significant neutralization capacity, which was transferred to the recipient. However, as early as 30 minutes after transfusion, recipient plasma neutralization titers were 6.2% (range, 5.9%-6.7%) of donor titers.CONCLUSIONConvalescent plasma transfused to high-risk children appears to be safe, with expected antibody kinetics, regardless of weight or age. However, current use of convalescent plasma in high-risk children achieves neutralizing capacity, which may protect against severe disease but is unlikely to provide lasting protection.Trial registrationClinicalTrials.gov NCT04377672.FundingThe state of Maryland, Bloomberg Philanthropies, and the NIH (grants R01-AI153349, R01-AI145435-A1, K08-AI139371-A1, and T32-AI052071).
    MeSH term(s) Adolescent ; Antibodies, Neutralizing/administration & dosage ; Antibodies, Viral/administration & dosage ; COVID-19/blood ; COVID-19/therapy ; Child ; Child, Preschool ; Female ; Humans ; Immunization, Passive ; Infant ; Male ; Pharmacokinetics ; Risk Factors ; SARS-CoV-2/metabolism ; COVID-19 Serotherapy
    Chemical Substances Antibodies, Neutralizing ; Antibodies, Viral
    Language English
    Publishing date 2022-01-25
    Publishing country United States
    Document type Clinical Trial ; Journal Article ; Research Support, N.I.H., Extramural
    ISSN 2379-3708
    ISSN (online) 2379-3708
    DOI 10.1172/jci.insight.151518
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Pharmacokinetics of high-titer anti–SARS-CoV-2 human convalescent plasma in high-risk children

    Oren Gordon / Mary Katherine Brosnan / Steve Yoon / Dawoon Jung / Kirsten Littlefield / Abhinaya Ganesan / Christopher A. Caputo / Maggie Li / William R. Morgenlander / Stephanie N. Henson / Alvaro A. Ordonez / Patricia De Jesus / Elizabeth W. Tucker / Nadine Peart Akindele / Zexu Ma / Jo Wilson / Camilo A. Ruiz-Bedoya / M. Elizabeth M. Younger / Evan M. Bloch /
    Shmuel Shoham / David Sullivan / Aaron A.R. Tobian / Kenneth R. Cooke / Ben Larman / Jogarao V.S. Gobburu / Arturo Casadevall / Andrew Pekosz / Howard M. Lederman / Sabra L. Klein / Sanjay K. Jain

    JCI Insight, Vol 7, Iss

    2022  Volume 2

    Abstract: BACKGROUND While most children who contract COVID-19 experience mild disease, high-risk children with underlying conditions may develop severe disease, requiring interventions. Kinetics of antibodies transferred via COVID-19 convalescent plasma early in ... ...

    Abstract BACKGROUND While most children who contract COVID-19 experience mild disease, high-risk children with underlying conditions may develop severe disease, requiring interventions. Kinetics of antibodies transferred via COVID-19 convalescent plasma early in disease have not been characterized.METHODS In this study, high-risk children were prospectively enrolled to receive high-titer COVID-19 convalescent plasma (>1:320 anti-spike IgG; Euroimmun). Passive transfer of antibodies and endogenous antibody production were serially evaluated for up to 2 months after transfusion. Commercial and research ELISA assays, virus neutralization assays, high-throughput phage-display assay utilizing a coronavirus epitope library, and pharmacokinetic analyses were performed.RESULTS Fourteen high-risk children (median age, 7.5 years) received high-titer COVID-19 convalescent plasma, 9 children within 5 days (range, 2–7 days) of symptom onset and 5 children within 4 days (range, 3–5 days) after exposure to SARS-CoV-2. There were no serious adverse events related to transfusion. Antibodies against SARS-CoV-2 were transferred from the donor to the recipient, but antibody titers declined by 14–21 days, with a 15.1-day half-life for spike protein IgG. Donor plasma had significant neutralization capacity, which was transferred to the recipient. However, as early as 30 minutes after transfusion, recipient plasma neutralization titers were 6.2% (range, 5.9%–6.7%) of donor titers.CONCLUSION Convalescent plasma transfused to high-risk children appears to be safe, with expected antibody kinetics, regardless of weight or age. However, current use of convalescent plasma in high-risk children achieves neutralizing capacity, which may protect against severe disease but is unlikely to provide lasting protection.Trial registration ClinicalTrials.gov NCT04377672.Funding The state of Maryland, Bloomberg Philanthropies, and the NIH (grants R01-AI153349, R01-AI145435-A1, K08-AI139371-A1, and T32-AI052071).
    Keywords COVID-19 ; Infectious disease ; Medicine ; R
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher American Society for Clinical investigation
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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