Project description:We leverage the extraordinary molecular diversity of modified heparan sulfate (HS) glycans 8 to establish cellular glycotypes, defined by binding patterns of a panel of flow-cytometry compatible single-chain variable fragment antibodies (scFvs) specific for differentially modified HS. We find distinct glycotypes between closely related hematopoietic progenitors and lineages. The glycotypes of murine and human hematopoietic stem and progenitor cells (HSPCs) reveal dynamic yet similar HS modification patterns in vivo and in vitro, including along megakaryocyte and erythrocyte differentiation. Prospective HS scFv-based sorting identifies new cellular subtypes from both immunophenotypic megakaryocyte-erythrocyte progenitors and heterogeneous pools of HSPCs, thus offering additional discriminative power beyond conventional CD markers. Mechanistically, single-cell RNAseq revealed that a heptad of HS-related genes participate in megakaryocyte-erythrocyte fate determination and are reflective of the HS epitope recognized by specific HS scFvs. In summary, HS glycotyping establishes a role for HS modification patterns in hematopoietic lineage differentiation in mouse and human, and provides an orthogonal approach to define and isolate viable cell types across different cell lineages and species at unprecedented resolution.
Project description:We leverage the extraordinary molecular diversity of modified heparan sulfate (HS) glycans to establish cellular glycotypes, defined by binding patterns of a panel of flow-cytometry compatible single-chain variable fragment antibodies (scFvs) specific for differentially modified HS. We find distinct glycotypes between closely related hematopoietic progenitors and lineages. The glycotypes of murine and human hematopoietic stem and progenitor cells (HSPCs) reveal dynamic yet similar HS modification patterns in vivo and in vitro, including along megakaryocyte and erythrocyte differentiation. Prospective HS scFv-based sorting identifies new cellular subtypes from both immunophenotypic megakaryocyte-erythrocyte progenitors and heterogeneous pools of HSPCs, thus offering additional discriminative power beyond conventional CD markers. Mechanistically, single-cell RNAseq revealed that a heptad of HS-related genes participate in megakaryocyte-erythrocyte fate determination and are reflective of the HS epitope recognized by specific HS scFvs. In summary, HS glycotyping establishes a role for HS modification patterns in hematopoietic lineage differentiation in mouse and human, and provides an orthogonal approach to define and isolate viable cell types across different cell lineages and species at unprecedented resolution.
Project description:Purpose: This study uses a high-throughput glycan microarray to develop a novel method to assign ABO blood type. The method will then be applied to samples from patients treated with PROSTVAC to determine if blood type correlates with survival Results: Many blood group A and B antigens correlate with blood type. Blood typing is best achieved using a combination of 10 signals Conclusion: ABO blood type can be determined with greater than 97% accuracy using only 4 microliters of serum.
Project description:We studied the membrane protein compositions of Streptococcus pneumoniae WT and scRNA mutant strains, with or without the CSP1 induction into competence state.
Project description:This SuperSeries is composed of the following subset Series: GSE11944: Mucosal Glycan Foraging Enhances the Fitness and Transmission of a Saccharolytic Human Distal Gut Symbiont GSE11953: Mucosal Glycan Foraging Enhances the Fitness and Transmission of a Saccharolytic Human Distal Gut Symbiont: ECF mutant GSE11962: Growth of B. thetaiotaomicron on purified host mucosal glycans and glycan fragments Refer to individual Series