LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 129

Search options

  1. Article: High transmission of endemic human coronaviruses before and during the COVID-19 pandemic in adolescents in Cebu, Philippines.

    Joseph, Janet O / Ylade, Michelle / Daag, Jedas Veronica / Aogo, Rosemary / Crisostomo, Maria Vinna / Mpingabo, Patrick / Premkumar, Lakshmanane / Deen, Jacqueline / Katzelnick, Leah

    Research square

    2023  

    Abstract: Background: SARS-CoV-2, the causative agent of COVID-19, is a betacoronavirus belonging to the same genus as endemic human coronaviruses (hCoVs) OC43 and HKU1 and is distinct from alpha hCoVs 229E and NL63. In a study of adolescents in the Philippines, ... ...

    Abstract Background: SARS-CoV-2, the causative agent of COVID-19, is a betacoronavirus belonging to the same genus as endemic human coronaviruses (hCoVs) OC43 and HKU1 and is distinct from alpha hCoVs 229E and NL63. In a study of adolescents in the Philippines, we evaluated the seroprevalence to hCoVs, whether pre-pandemic hCoV immunity modulated subsequent risk of SARS-CoV-2 infection, and if SARS-CoV-2 infection affected the transmission of the hCoVs.
    Methods: From 499 samples collected in 2021 and screened by SARS-CoV-2 receptor binding domain (RBD) enzyme-linked immunosorbent assay (ELISA), we randomly selected 59 SARS-CoV-2 negative and 61 positive individuals for further serological evaluation. We measured RBD and spike antibodies to the four hCoVs and SARS-CoV-2 by ELISA in samples from the same participants collected pre-pandemic (2018-2019) and mid-pandemic (2021), before COVID-19 vaccination.
    Results: We observed over 72% seropositivity to the four hCoVs pre-pandemic. Binding antibodies increased with age to 229E and OC43, suggesting endemic circulation, while immunity was flat across ages for HKU1 and NL63. During the COVID-19 pandemic, antibody level increased significantly to the RBDs of OC43, NL63, and 229E and spikes of all four hCoVs in both SARS-CoV-2 negative and positive adolescents. Those aged 12-15 years old in 2021 had higher antibodies to RBD and spike of OC43, NL63, and 229E than adolescents the same age in 2019, further demonstrating intense transmission of the hCoVs during the pandemic.
    Conclusions: We observe a limited impact of the COVID-19 pandemic on endemic hCoV transmission. This study provides insight into co-circulation of hCoVs and SARS-CoV-2.
    Language English
    Publishing date 2023-11-16
    Publishing country United States
    Document type Preprint
    DOI 10.21203/rs.3.rs-3581033/v1
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: SARS-CoV-2 Seroprevalence: Demographic and Behavioral Factors Associated With Seropositivity Among College Students in a University Setting.

    Diepstra, Karen / Bullington, Brooke W / Premkumar, Lakshmanane / Shook-Sa, Bonnie E / Jones, Corbin / Pettifor, Audrey

    The Journal of adolescent health : official publication of the Society for Adolescent Medicine

    2022  Volume 71, Issue 5, Page(s) 559–569

    Abstract: Purpose: Examine SARS-CoV-2 seroprevalence and the association of seropositivity with demographic, geographic, and behavioral variables among University of North Carolina Chapel Hill (UNC-CH) undergraduate students enrolled in the fall 2020 semester.: ...

    Abstract Purpose: Examine SARS-CoV-2 seroprevalence and the association of seropositivity with demographic, geographic, and behavioral variables among University of North Carolina Chapel Hill (UNC-CH) undergraduate students enrolled in the fall 2020 semester.
    Methods: All UNC-CH undergraduate students were invited to participate in the Heelcheck study; participants were weighted to the UNC-CH undergraduate population using raking methods. We estimate SARS-CoV-2 seroprevalence at study entrance (11/12/2020-12/10/2020) and bivariable associations using log-binomial regression.
    Results: SARS-CoV-2 seroprevalence was 7.3% (95% confidence interval (CI): 5.4%-9.2%) at baseline. Compared to students who were living off-campus in the Chapel Hill/Carrboro area (CH) for the Fall 2020 semester (8.6% seroprevalence), students who never returned to CH had lower seroprevalence (1.9%, prevalence ratio (PR), 95% CI: 0.22, 0.06-0.81), whereas, students who started the semester on-campus and moved to off-campus CH housing had 18.9% seroprevalence (PR, 95% CI: 2.21, 1.04-4.72) and students who spent the semester living in a Sorority/Fraternity house had 46.8% seroprevalence (PR, 95% CI: 5.47, 2.62-11.46). Those who predicted they would join an indoor party unmasked had 3.8 times the seroprevalence of those who indicated they would not attend (PR, 95% CI: 3.80, 1.58-9.16). Compared to students who disagreed with the statement "…I am not going to let COVID-19 stop me from having fun…", those who agreed had higher seroprevalence (14.0% vs. 5.7%; (PR, 95% CI: 2.45, 1.13-5.32)).
    Discussion: Increased seroprevalence was associated with congregate living and participation (actual or endorsed) in social activities. During pandemics, universities must create safe socializing opportunities while minimizing transmission.
    MeSH term(s) Humans ; SARS-CoV-2 ; Universities ; Seroepidemiologic Studies ; COVID-19 ; Students ; Demography
    Language English
    Publishing date 2022-07-04
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1063374-1
    ISSN 1879-1972 ; 1054-139X
    ISSN (online) 1879-1972
    ISSN 1054-139X
    DOI 10.1016/j.jadohealth.2022.06.015
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article: Inapparent primary dengue virus infections reveal hidden serotype-specific epidemiological patterns and spectrum of infection outcome: a cohort study in Nicaragua.

    Bos, Sandra / Zambrana, Jose Victor / Duarte, Elias / Graber, Aaron L / Huffaker, Julia / Montenegro, Carlos / Premkumar, Lakshmanane / Gordon, Aubree / Balmaseda, Angel / Harris, Eva

    medRxiv : the preprint server for health sciences

    2024  

    Abstract: Background: Dengue is the most prevalent mosquito-borne viral disease and a major public health problem worldwide. Most primary infections with the four dengue virus serotypes (DENV1-4) are inapparent; nevertheless, prior research has primarily focused ... ...

    Abstract Background: Dengue is the most prevalent mosquito-borne viral disease and a major public health problem worldwide. Most primary infections with the four dengue virus serotypes (DENV1-4) are inapparent; nevertheless, prior research has primarily focused on symptomatic infections, which has limited our understanding of the epidemiological burden and spectrum of disease of each DENV serotype. Our study addresses this bottleneck in dengue research by providing a new method and a detailed examination of primary inapparent infections.
    Methods: Here we present (1) the evaluation of a multiplex DENV1-4 envelope domain III multiplex microsphere-based assay (EDIII-MMBA) to serotype inapparent primary infections and (2) its application leveraging 17 years of prospective sample collection from the Nicaraguan Pediatric Dengue Cohort Study. After evaluation, we analyzed 46% (N=574) of total inapparent primary DENV infections with the EDIII-MMBA. Remaining infections were inferred using stochastic imputation, taking year and neighborhood of infection into account.
    Findings: The EDIII-MMBA demonstrated excellent diagnostic accuracy of symptomatic and inapparent primary DENV infections when evaluated against gold-standard serotyping methods. Significant within- and between-year variation in serotype distribution between symptomatic and inapparent infections and circulation of serotypes undetected in symptomatic cases were observed in multiple years. Our findings reveal that a significant majority of primary infections remained inapparent: 76.8% for DENV1, 79.9% for DENV2, and 63.9% for DENV3. DENV3 exhibited the highest likelihood of symptomatic and severe primary infections (Pooled OR compared to DENV1 = 2.13, 95% CI 1.28-3.56, and 6.75, 2.01-22.62, respectively), whereas DENV2 had similar likelihood to DENV1 in both analyses.
    Interpretation: Our study indicates that case surveillance skews the perceived epidemiological footprint of DENV and reveals a more complex and intricate pattern of serotype distribution in inapparent infections. Further, the significant differences in infection outcomes by serotype emphasizes the need for serotype-informed public health strategies.
    Funding: NIH/NIAID P01AI106695, U01AI153416.
    Research in context: Evidence before this study:
    Language English
    Publishing date 2024-04-08
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2024.04.05.24305281
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Antibody Immunity to Zika Virus among Young Children in a Flavivirus-Endemic Area in Nicaragua.

    Zepeda, Omar / Espinoza, Daniel O / Martinez, Evelin / Cross, Kaitlyn A / Becker-Dreps, Sylvia / de Silva, Aravinda M / Bowman, Natalie M / Premkumar, Lakshmanane / Stringer, Elizabeth M / Bucardo, Filemón / Collins, Matthew H

    Viruses

    2023  Volume 15, Issue 3

    Abstract: Objective: ...

    Abstract Objective:
    MeSH term(s) Infant ; Infant, Newborn ; Female ; Humans ; Child ; Pregnancy ; Child, Preschool ; Zika Virus ; Flavivirus ; Zika Virus Infection ; Nicaragua/epidemiology ; Dengue Virus ; Antibodies, Viral ; Immunoglobulin G ; Cross Reactions ; Dengue
    Chemical Substances Antibodies, Viral ; Immunoglobulin G
    Language English
    Publishing date 2023-03-21
    Publishing country Switzerland
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2516098-9
    ISSN 1999-4915 ; 1999-4915
    ISSN (online) 1999-4915
    ISSN 1999-4915
    DOI 10.3390/v15030796
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article: Targets and cross-reactivity of human T cell recognition of Common Cold Coronaviruses.

    Tarke, Alison / Zhang, Yun / Methot, Nils / Narowski, Tara M / Phillips, Elizabeth / Mallal, Simon / Frazier, April / Filaci, Gilberto / Weiskopf, Daniela / Dan, Jennifer M / Premkumar, Lakshmanane / Scheuermann, Richard H / Sette, Alessandro / Grifoni, Alba

    bioRxiv : the preprint server for biology

    2023  

    Abstract: The Coronavirus (CoV) family includes a variety of viruses able to infect humans. Endemic CoVs that can cause common cold belong to the alphaCoV and betaCoV genera, with the betaCoV genus also containing subgenera with zoonotic and pandemic concern, ... ...

    Abstract The Coronavirus (CoV) family includes a variety of viruses able to infect humans. Endemic CoVs that can cause common cold belong to the alphaCoV and betaCoV genera, with the betaCoV genus also containing subgenera with zoonotic and pandemic concern, including sarbecoCoV (SARS-CoV and SARS-CoV-2) and merbecoCoV (MERS-CoV). It is therefore warranted to explore pan-CoV vaccine concepts, to provide adaptive immune protection against new potential CoV outbreaks, particularly in the context of betaCoV sub lineages. To explore the feasibility of eliciting CD4
    Language English
    Publishing date 2023-01-05
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.01.04.522794
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Production of the Receptor-binding Domain of the Viral Spike Proteins from 2003 and 2019 SARS CoVs and the Four Common Human Coronaviruses for Serologic Assays and Inhibitor Screening.

    Segovia-Chumbez, Bruno / Graham, Stephen D / Jadi, Ramesh / de Silva, Aravinda M / Premkumar, Lakshmanane

    Bio-protocol

    2021  Volume 11, Issue 10, Page(s) e4026

    Abstract: The recombinant receptor-binding domain (RBD) of the viral spike protein from SARS-CoV-1 and 2 are reliable antigens for detecting viral-specific antibodies in humans. We and others have shown that the levels of RBD-binding antibodies and SARS-CoV-2 ... ...

    Abstract The recombinant receptor-binding domain (RBD) of the viral spike protein from SARS-CoV-1 and 2 are reliable antigens for detecting viral-specific antibodies in humans. We and others have shown that the levels of RBD-binding antibodies and SARS-CoV-2 neutralizing antibodies in patients are correlated. Here, we report the expression and purification of properly folded RBD proteins from SARS and common-cold HCoVs in mammalian cells. RBD proteins were produced with cleavable tags for affinity purification from the cell culture medium and to support multiple immunoassay platforms and drug discovery efforts. Graphic abstract: High-Yield Production of Viral Spike RBDs for Diagnostics and Drug Discovery.
    Language English
    Publishing date 2021-05-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2833269-6
    ISSN 2331-8325 ; 2331-8325
    ISSN (online) 2331-8325
    ISSN 2331-8325
    DOI 10.21769/BioProtoc.4026
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Targets and cross-reactivity of human T cell recognition of common cold coronaviruses.

    Tarke, Alison / Zhang, Yun / Methot, Nils / Narowski, Tara M / Phillips, Elizabeth / Mallal, Simon / Frazier, April / Filaci, Gilberto / Weiskopf, Daniela / Dan, Jennifer M / Premkumar, Lakshmanane / Scheuermann, Richard H / Sette, Alessandro / Grifoni, Alba

    Cell reports. Medicine

    2023  Volume 4, Issue 6, Page(s) 101088

    Abstract: The coronavirus (CoV) family includes several viruses infecting humans, highlighting the importance of exploring pan-CoV vaccine strategies to provide broad adaptive immune protection. We analyze T cell reactivity against representative Alpha (NL63) and ... ...

    Abstract The coronavirus (CoV) family includes several viruses infecting humans, highlighting the importance of exploring pan-CoV vaccine strategies to provide broad adaptive immune protection. We analyze T cell reactivity against representative Alpha (NL63) and Beta (OC43) common cold CoVs (CCCs) in pre-pandemic samples. S, N, M, and nsp3 antigens are immunodominant, as shown for severe acute respiratory syndrome 2 (SARS2), while nsp2 and nsp12 are Alpha or Beta specific. We further identify 78 OC43- and 87 NL63-specific epitopes, and, for a subset of those, we assess the T cell capability to cross-recognize sequences from representative viruses belonging to AlphaCoV, sarbecoCoV, and Beta-non-sarbecoCoV groups. We find T cell cross-reactivity within the Alpha and Beta groups, in 89% of the instances associated with sequence conservation >67%. However, despite conservation, limited cross-reactivity is observed for sarbecoCoV, indicating that previous CoV exposure is a contributing factor in determining cross-reactivity. Overall, these results provide critical insights in developing future pan-CoV vaccines.
    MeSH term(s) Humans ; Common Cold ; T-Lymphocytes ; COVID-19 ; SARS-CoV-2 ; Cross Reactions
    Language English
    Publishing date 2023-05-29
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ISSN 2666-3791
    ISSN (online) 2666-3791
    DOI 10.1016/j.xcrm.2023.101088
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article: Magnitude and Durability of the Antibody Response to mRNA-Based Vaccination Among SARS-CoV-2 Seronegative and Seropositive Health Care Personnel.

    Ciccone, Emily J / Zhu, Deanna R / Gunderson, Annika K / Hawke, Sam / Ajeen, Rawan / Lodge, Evans K / Shook-Sa, Bonnie E / Abernathy, Haley / Garrett, Haley E / King, Elise / Alavian, Naseem / Reyes, Raquel / Taylor, Jasmine L / Beatty, Cherese / Chung, Christy / Mendoza, Carmen E / Weber, David J / Markmann, Alena J / Premkumar, Lakshmanane /
    Juliano, Jonathan J / Boyce, Ross M / Aiello, Allison E

    Open forum infectious diseases

    2024  Volume 11, Issue 1, Page(s) ofae009

    Abstract: Few studies have described changes in SARS-CoV-2 antibody levels in response to infection and vaccination at frequent intervals and over extended follow-up periods. The purpose of this study was to assess changes in SARS-CoV-2-specific antibody responses ...

    Abstract Few studies have described changes in SARS-CoV-2 antibody levels in response to infection and vaccination at frequent intervals and over extended follow-up periods. The purpose of this study was to assess changes in SARS-CoV-2-specific antibody responses among a prospective cohort of health care personnel over 18 months with up to 22 samples per person. Antibody levels and live virus neutralization were measured before and after mRNA-based vaccination with results stratified by (1) SARS-CoV-2 infection status prior to initial vaccination and (2) SARS-CoV-2 infection at any point during follow-up. We found that the antibody response to the first dose was almost 2-fold higher in individuals who were seropositive prior to vaccination, although neutralization titers were more variable. The antibody response induced by vaccination appeared to wane over time but generally persisted for 8 to 9 months, and those who were infected at any point during the study had slightly higher antibody levels over time vs those who remained uninfected. These findings underscore the need to account for SARS-CoV-2 natural infection as a modifier of vaccine responses, and they highlight the importance of frequent testing of longitudinal antibody titers over time. Together, our results provide a clearer understanding of the trajectories of antibody response among vaccinated individuals with and without prior SARS-CoV-2 infection.
    Language English
    Publishing date 2024-01-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2757767-3
    ISSN 2328-8957
    ISSN 2328-8957
    DOI 10.1093/ofid/ofae009
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Structure and neutralization mechanism of a human antibody targeting a complex Epitope on Zika virus.

    Adams, Cameron / Carbaugh, Derek L / Shu, Bo / Ng, Thiam-Seng / Castillo, Izabella N / Bhowmik, Ryan / Segovia-Chumbez, Bruno / Puhl, Ana C / Graham, Stephen / Diehl, Sean A / Lazear, Helen M / Lok, Shee-Mei / de Silva, Aravinda M / Premkumar, Lakshmanane

    PLoS pathogens

    2023  Volume 19, Issue 1, Page(s) e1010814

    Abstract: We currently have an incomplete understanding of why only a fraction of human antibodies that bind to flaviviruses block infection of cells. Here we define the footprint of a strongly neutralizing human monoclonal antibody (mAb G9E) with Zika virus (ZIKV) ...

    Abstract We currently have an incomplete understanding of why only a fraction of human antibodies that bind to flaviviruses block infection of cells. Here we define the footprint of a strongly neutralizing human monoclonal antibody (mAb G9E) with Zika virus (ZIKV) by both X-ray crystallography and cryo-electron microscopy. Flavivirus envelope (E) glycoproteins are present as homodimers on the virion surface, and G9E bound to a quaternary structure epitope spanning both E protomers forming a homodimer. As G9E mainly neutralized ZIKV by blocking a step after viral attachment to cells, we tested if the neutralization mechanism of G9E was dependent on the mAb cross-linking E molecules and blocking low-pH triggered conformational changes required for viral membrane fusion. We introduced targeted mutations to the G9E paratope to create recombinant antibodies that bound to the ZIKV envelope without cross-linking E protomers. The G9E paratope mutants that bound to a restricted epitope on one protomer poorly neutralized ZIKV compared to the wild-type mAb, demonstrating that the neutralization mechanism depended on the ability of G9E to cross-link E proteins. In cell-free low pH triggered viral fusion assay, both wild-type G9E, and epitope restricted paratope mutant G9E bound to ZIKV but only the wild-type G9E blocked fusion. We propose that, beyond antibody binding strength, the ability of human antibodies to cross-link E-proteins is a critical determinant of flavivirus neutralization potency.
    MeSH term(s) Humans ; Zika Virus/genetics ; Epitopes ; Zika Virus Infection ; Antibodies, Neutralizing ; Antibodies, Viral ; Protein Subunits ; Cryoelectron Microscopy ; Viral Envelope Proteins/genetics ; Antibodies, Monoclonal
    Chemical Substances Epitopes ; Antibodies, Neutralizing ; Antibodies, Viral ; Protein Subunits ; Viral Envelope Proteins ; Antibodies, Monoclonal
    Language English
    Publishing date 2023-01-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2205412-1
    ISSN 1553-7374 ; 1553-7374
    ISSN (online) 1553-7374
    ISSN 1553-7374
    DOI 10.1371/journal.ppat.1010814
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Investigation of the Host Kinome Response to Coronavirus Infection Reveals PI3K/mTOR Inhibitors as Betacoronavirus Antivirals.

    Fritch, Ethan J / Mordant, Angie L / Gilbert, Thomas S K / Wells, Carrow I / Yang, Xuan / Barker, Natalie K / Madden, Emily A / Dinnon, Kenneth H / Hou, Yixuan J / Tse, Longping V / Castillo, Izabella N / Sims, Amy C / Moorman, Nathaniel J / Lakshmanane, Premkumar / Willson, Timothy M / Herring, Laura E / Graves, Lee M / Baric, Ralph S

    Journal of proteome research

    2023  Volume 22, Issue 10, Page(s) 3159–3177

    Abstract: Host kinases play essential roles in the host cell cycle, innate immune signaling, the stress response to viral infection, and inflammation. Previous work has demonstrated that coronaviruses specifically target kinase cascades to subvert host cell ... ...

    Abstract Host kinases play essential roles in the host cell cycle, innate immune signaling, the stress response to viral infection, and inflammation. Previous work has demonstrated that coronaviruses specifically target kinase cascades to subvert host cell responses to infection and rely upon host kinase activity to phosphorylate viral proteins to enhance replication. Given the number of kinase inhibitors that are already FDA approved to treat cancers, fibrosis, and other human disease, they represent an attractive class of compounds to repurpose for host-targeted therapies against emerging coronavirus infections. To further understand the host kinome response to betacoronavirus infection, we employed multiplex inhibitory bead mass spectrometry (MIB-MS) following MERS-CoV and SARS-CoV-2 infection of human lung epithelial cell lines. Our MIB-MS analyses revealed activation of mTOR and MAPK signaling following MERS-CoV and SARS-CoV-2 infection, respectively. SARS-CoV-2 host kinome responses were further characterized using paired phosphoproteomics, which identified activation of MAPK, PI3K, and mTOR signaling. Through chemogenomic screening, we found that clinically relevant PI3K/mTOR inhibitors were able to inhibit coronavirus replication at nanomolar concentrations similar to direct-acting antivirals. This study lays the groundwork for identifying broad-acting, host-targeted therapies to reduce betacoronavirus replication that can be rapidly repurposed during future outbreaks and epidemics. The proteomics, phosphoproteomics, and MIB-MS datasets generated in this study are available in the Proteomics Identification Database (PRIDE) repository under project identifiers PXD040897 and PXD040901.
    MeSH term(s) Humans ; Antiviral Agents/pharmacology ; COVID-19 ; MTOR Inhibitors ; Phosphatidylinositol 3-Kinases ; SARS-CoV-2 ; Virus Replication ; Hepatitis C, Chronic ; Middle East Respiratory Syndrome Coronavirus/physiology ; TOR Serine-Threonine Kinases
    Chemical Substances Antiviral Agents ; MTOR Inhibitors ; Phosphatidylinositol 3-Kinases (EC 2.7.1.-) ; TOR Serine-Threonine Kinases (EC 2.7.11.1)
    Language English
    Publishing date 2023-08-27
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2078618-9
    ISSN 1535-3907 ; 1535-3893
    ISSN (online) 1535-3907
    ISSN 1535-3893
    DOI 10.1021/acs.jproteome.3c00182
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top