{"id":{"repo_id":"cape-town","oai_identifier":"oai:open.uct.ac.za:11427/3380"},"canonical_url":"https://search.dev.ndltd.org/etd/cape-town/oai:open.uct.ac.za:11427/3380","repository":{"repo_id":"cape-town","name":"University of Cape Town","base_url":"https://open.uct.ac.za/oai/request"},"display":{"title":"Investigating the role of B and T lymphocytes in the course of murine Leishmania Major infection","abstract":"This thesis is composed of two parts. The first is an investigation of the role of B-effector cells in the course of murine Leishmania Major (L. major). The second is a bioinformatic analysis of microarray slides of activated CD4 T-cells from L. major infected BALB/c and C57BL/6 mice in order to investigate the genetic determinants of their divergent disease phenotypes. Overall this thesis is an investigation of the role of B-and T-lymphocytes during the course of L. major infection in mice. B-cells are not traditionally thought to play a role in the pathogenesis of Leishmania major infection. It is well documented that T-helper 1(Th1) and T-helper 2 (Th2) responses lead to resistance and susceptiblity to L. major respectively. Recent studies have now shown that B-cells are capable to producing key T-cell differentiating cytokines such as IL-4 and IFN-γ. More specifically, two new B-cell populations have been identified: B effector 1 (Be1) and B effector 2 (Be2) cells, which produce IFN-γ and IL-4 respectively. Using mice lacking the IL-4Rα on B-cells, and thus incapble of producing Be2 cells, we investigate the contribution of Be2 cells to BALB/c susceptibility. We confirm that the delection of the IL-4Rα on B-cells renders the previously susceptible BALB/c mice resistant to L. major strain LV39 and further confirm the phenotype using the more the virulent IL81 strain. We demonstrate that mice lacking Be2 cells exhibit a dimished Th2 response and an enhanced Th1 response, suggesting that B-cells, in addition to their role in antibody production, may also play a role in shaping T-helper responses in vivo. In the case of L.major, this provides evidence for a novel link between B cells and the cellular immune response.","abstract_html":"This thesis is composed of two parts. The first is an investigation of the role of B-effector cells in the course of murine Leishmania Major (L. major). The second is a bioinformatic analysis of microarray slides of activated CD4 T-cells from L. major infected BALB/c and C57BL/6 mice in order to investigate the genetic determinants of their divergent disease phenotypes. Overall this thesis is an investigation of the role of B-and T-lymphocytes during the course of L. major infection in mice. B-cells are not traditionally thought to play a role in the pathogenesis of Leishmania major infection. It is well documented that T-helper 1(Th1) and T-helper 2 (Th2) responses lead to resistance and susceptiblity to L. major respectively. Recent studies have now shown that B-cells are capable to producing key T-cell differentiating cytokines such as IL-4 and IFN-γ. More specifically, two new B-cell populations have been identified: B effector 1 (Be1) and B effector 2 (Be2) cells, which produce IFN-γ and IL-4 respectively. Using mice lacking the IL-4Rα on B-cells, and thus incapble of producing Be2 cells, we investigate the contribution of Be2 cells to BALB/c susceptibility. We confirm that the delection of the IL-4Rα on B-cells renders the previously susceptible BALB/c mice resistant to L. major strain LV39 and further confirm the phenotype using the more the virulent IL81 strain. We demonstrate that mice lacking Be2 cells exhibit a dimished Th2 response and an enhanced Th1 response, suggesting that B-cells, in addition to their role in antibody production, may also play a role in shaping T-helper responses in vivo. In the case of L.major, this provides evidence for a novel link between B cells and the cellular immune response.","abstract_has_math":false,"creators":["Einhorn, Andrew"],"institution":"Department of Medicine","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Brombacher, Frank"],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013","date_published":"2013","updated_at":"2026-07-22T22:22:58Z","subjects":[],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11427/3380","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Brombacher, Frank"]},{"key":"dc:creator","label":"Author","values":["Einhorn, Andrew"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-07-29T09:03:20Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-07-29T09:03:20Z"]},{"key":"dc:date.issued","label":"Date","values":["2013"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Department of Medicine"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Cape Town"]},{"key":"dc:type","label":"Dc Type","values":["Master Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Masters"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["MSc"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11427/3380"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Includes abstract.","Includes bibliographical references."]},{"key":"dc:description.abstract","label":"Abstract","values":["This thesis is composed of two parts. The first is an investigation of the role of B-effector cells in the course of murine Leishmania Major (L. major). The second is a bioinformatic analysis of microarray slides of activated CD4 T-cells from L. major infected BALB/c and C57BL/6 mice in order to investigate the genetic determinants of their divergent disease phenotypes. Overall this thesis is an investigation of the role of B-and T-lymphocytes during the course of L. major infection in mice. B-cells are not traditionally thought to play a role in the pathogenesis of Leishmania major infection. It is well documented that T-helper 1(Th1) and T-helper 2 (Th2) responses lead to resistance and susceptiblity to L. major respectively. Recent studies have now shown that B-cells are capable to producing key T-cell differentiating cytokines such as IL-4 and IFN-γ. More specifically, two new B-cell populations have been identified: B effector 1 (Be1) and B effector 2 (Be2) cells, which produce IFN-γ and IL-4 respectively. Using mice lacking the IL-4Rα on B-cells, and thus incapble of producing Be2 cells, we investigate the contribution of Be2 cells to BALB/c susceptibility. We confirm that the delection of the IL-4Rα on B-cells renders the previously susceptible BALB/c mice resistant to L. major strain LV39 and further confirm the phenotype using the more the virulent IL81 strain. We demonstrate that mice lacking Be2 cells exhibit a dimished Th2 response and an enhanced Th1 response, suggesting that B-cells, in addition to their role in antibody production, may also play a role in shaping T-helper responses in vivo. In the case of L.major, this provides evidence for a novel link between B cells and the cellular immune response."]},{"key":"dc:title","label":"Title","values":["Investigating the role of B and T lymphocytes in the course of murine Leishmania Major infection"]}]}],"canonical_facts":{"dc:contributor.advisor":["Brombacher, Frank"],"dc:creator":["Einhorn, Andrew"],"dc:date.accessioned":["2014-07-29T09:03:20Z"],"dc:date.available":["2014-07-29T09:03:20Z"],"dc:date.issued":["2013"],"dc:description":["Includes abstract.","Includes bibliographical references."],"dc:description.abstract":["This thesis is composed of two parts. The first is an investigation of the role of B-effector cells in the course of murine Leishmania Major (L. major). The second is a bioinformatic analysis of microarray slides of activated CD4 T-cells from L. major infected BALB/c and C57BL/6 mice in order to investigate the genetic determinants of their divergent disease phenotypes. Overall this thesis is an investigation of the role of B-and T-lymphocytes during the course of L. major infection in mice. B-cells are not traditionally thought to play a role in the pathogenesis of Leishmania major infection. It is well documented that T-helper 1(Th1) and T-helper 2 (Th2) responses lead to resistance and susceptiblity to L. major respectively. Recent studies have now shown that B-cells are capable to producing key T-cell differentiating cytokines such as IL-4 and IFN-γ. More specifically, two new B-cell populations have been identified: B effector 1 (Be1) and B effector 2 (Be2) cells, which produce IFN-γ and IL-4 respectively. Using mice lacking the IL-4Rα on B-cells, and thus incapble of producing Be2 cells, we investigate the contribution of Be2 cells to BALB/c susceptibility. We confirm that the delection of the IL-4Rα on B-cells renders the previously susceptible BALB/c mice resistant to L. major strain LV39 and further confirm the phenotype using the more the virulent IL81 strain. We demonstrate that mice lacking Be2 cells exhibit a dimished Th2 response and an enhanced Th1 response, suggesting that B-cells, in addition to their role in antibody production, may also play a role in shaping T-helper responses in vivo. In the case of L.major, this provides evidence for a novel link between B cells and the cellular immune response."],"dc:identifier.uri":["http://hdl.handle.net/11427/3380"],"dc:language.iso":["eng"],"dc:publisher.department":["Department of Medicine"],"dc:publisher.institution":["University of Cape Town"],"dc:title":["Investigating the role of B and T lymphocytes in the course of murine Leishmania Major infection"],"dc:type":["Master Thesis"],"dc:type.qualificationlevel":["Masters"],"dc:type.qualificationname":["MSc"]},"updated_at":"2026-07-22T22:22:58Z"}