Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA317685 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Broadly neutralizing antibodies (bnAbs) to the HIV envelope (Env) V2-apex region are important leads for HIV vaccine design. Most V2-apex bnAbs engage Env with an uncommonly long heavy chain complementarity-determining region 3 (HCDR3), suggesting that rarity of bnAb precursors poses a challenge for vaccine priming. We created precursor sequence definitions for V2-apex HCDR3-dependent bnAbs and searched for related precursors in human antibody heavy chain ultradeep sequencing data from 14 HIV-unexposed donors. We found potential precursors in a majority of donors for only two long-HCDR3 V2-apex bnAbs, PCT64 and PG9, identifying these bnAbs as priority vaccine targets. We then engineered ApexGT Env trimers that bind inferred germlines for PCT64 and PG9 and have higher affinities for bnAbs; determined cryo-EM structures of ApexGT trimers bound to inferred germline and bnAb forms of PCT64 and PG9; and developed an mRNA-encoded cell-surface trimer for our lead ApexGT candidate. The methods and immunogens developed here have promise to assist the development of an HIV vaccine.
2023-03-11 | PXD033766 | Pride
Project description:<p>The study sequenced antibody heavy chain gene rearrangements from 4 identical twin pairs undergoing vaccination with Varicella Zoster viral vaccine.</p>
| phs000817 | dbGaP
Project description:<p>The data consist of the DNA sequences of antibody gene rearrangements from peripheral blood human B cells of subjects vaccinated with trivalent seasonal influenza or monovalent pandemic H1N1 vaccine. Multiple replicate libraries of immunoglobulin heavy chain gene rearrangements were prepared from each subject for each time point.</p>
| phs000760 | dbGaP
Project description:<p>We developed an improved high throughput sequencing approach to measure the quantities and sequences of the repertoire of antibody heavy chain RNA in a blood sample. Using this approach we analyzed the antibody repertoire in response to yearly vaccinations with influenza vaccines TIV and LAIV in healthy adults in two subsequent years. We determined vaccine response patterns specific to LAIV and TIV and found antibody sequences that were shared between two samples of the same individuals following influenza vaccination in subsequent years, thereby providing a genetic measurement of B-cell memory recall.</p>
| phs000656 | dbGaP
Project description:The development of a prophylactic vaccine for Kaposi sarcoma-associated Herpesvirus (KSHV) would prevent consequences from infection including disorders such as Kaposi sarcoma and primary effusion lymphoma. Here, we study the immunogenicity of noninfectious virus-like vesicles (VLVs) of KSHV as a potential future vaccine platform. VLVs present a repertoire of viral structural proteins but are noninfectious due to a defect in capsid formation that prevents viral DNA packaging. Immunization of mice with adjuvanted VLVs results in virus-specific antibodies and T cells. These antibodies neutralize viral infection, and this neutralization is enhanced by the complement system. Complement-enhanced neutralization is dependent on antibodies targeting the SCR region of viral ORF4. However, this activity was not present in serum from KSHV-infected humans. Our study highlights an important role of antibody effector functions in the development of a future KSHV vaccine
2023-02-01 | PXD035478 | Pride
Project description:Mus musculus antibody heavy chain genes
| PRJNA234768 | ENA
Project description:Paired antibody heavy-light chain sequencing
| PRJEB25901 | ENA
Project description:In response to antigen challenge, human B cells clonally expand, undergo selection and differentiate within secondary lymphoid tissues to produce mature B cell subsets and high affinity antibodies necessary for an effective immune response. However, the interplay between affinity, antibody class and different B cell fates has proved challenging to decipher in primary human tissue. We have applied an integrated analysis of bulk and single-cell antibody repertoires paired with single-cell transcriptomics of human B cells from a model secondary lymphoid tissue. Specifically, here we have performed bulk B cell repertoire sequencing of the immunoglobulin heavy chain (IgH) for sorted B cell subsets from paediatric tonsil tissue. Matched single-cell gene expression and single-cell VDJ data are also available for the same patient donors.
2020-05-01 | E-MTAB-8999 | biostudies-arrayexpress
Project description:Human antibody heavy chain repertoires in dengue
| PRJNA205206 | ENA
Project description:Combining variant antigens into a multivalent vaccine is a traditional approach used to provide broad coverage against antigenically variable pathogens, such as polio, human papilloma and influenza viruses. However, strategies for increasing the breadth of antibody coverage beyond the vaccine are not well understood, but may provide more anticipatory protection. Influenza virus hemagglutinin (HA) is a prototypic variant antigen. Vaccines that induce HA-specific neutralizing antibodies lose efficacy as amino acid substitutions accumulate in neutralizing epitopes during influenza virus evolution. Here we studied the effect of a potent combination adjuvant (CpG/MPLA/squalene-in-water emulsion) on the breadth and maturation of the antibody response to a representative variant of HA subtypes H1, H5 and H7. Using HA protein microarrays and antigen-specific B cell labelling, we show when administered individually, each HA elicits a cross-reactive antibody profile for multiple variants within the same subtype and other closely-related subtypes (homosubtypic and heterosubtypic cross-reactivity, respectively). Despite a capacity for each subtype to induce heterosubtypic cross-reactivity, broader coverage was elicited by simply combining the subtypes into a multivalent vaccine. Importantly, multiplexing did not compromise antibody avidity or affinity maturation to the individual HA constituents. The use of adjuvants to increase the breadth of antibody coverage beyond the vaccine antigens may help future-proof vaccines against newly-emerging variants.
2021-06-26 | GSE178932 | GEO