Sökning: "sheep erythrocytes"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden sheep erythrocytes.

1. 1. A Search for the Masked Mechanism Behind IgG-Mediated Suppression of Antibody Responses

   Författare :Joakim Bergström; Birgitta Heyman; Jenny Hallgren Martinsson; Frida Henningsson Johnson; Mats Bemark; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; FcγR; complement; sheep erythrocytes; IgG-mediated immune suppression; rhesus prophylaxis; rhesus D antigen; germinal center; Immunologi; Immunology;

   Sammanfattning : Antibodies passively administered together with their specific antigen can enhance or suppress the specific antibody response. This phenomenon is known as antibody feedback regulation. Whether this modulation causes up- or downregulation of the antibody response depends both on the antibody isotype and the antigen used. LÄS MER

3. 2. Fcγ Receptors in the Immune Response

   Författare :Teresita Díaz de Ståhl; Jan van de Winkel; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; Fc Receptors; IgG Receptors; IgE Receptors; Immune regulation; In vivo animal models; Mouse; Rh prophylaxis; Rheumatoid arthritis; Transgenic knockout; Genetik; Clinical genetics; Klinisk genetik; Pathology; patologi;

   Sammanfattning : Circulating immune complexes play an important role in the modulation of antibody responses and in the pathogenesis of immune diseases. This thesis deals with the in vivo regulatory properties of antibodies and their specific Fc receptors. LÄS MER

4. 3. Modulation of B cell access to antigen by passively administered antibodies : an explanation for antibody feedback regulation?

   Författare :Hui Xu; Birgitta Heyman; Helena Harris; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; IgG; IgG3; IgE; suppression; enhancement; epitope masking; antigen transport; antigen presentation; follicular B cells; marginal zone B cells; Immunologi; Immunology;

   Sammanfattning : Antibody responses can be up- or down-regulated by passive administration of specific antibody together with antigen. Depending on the structure of the antigen and the antibody isotype, responses can be completely suppressed or enhanced up to a 1000-fold of what is seen in animals immunized with antigen alone. LÄS MER

5. 4. Feedback Enhancement of Antibody Responses via Complement and Fc Receptors

   Författare :Jörgen Dahlström; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; Mouse; transgenic knockout; immune regulation; B lymphocytes; Fc receptors; complement; IgG; IgM; IgE; Fc-gamma-RI; Fc-gamma-RII; Fc-gamma-RIII; CR1; CR2; CD21; CD35; Genetik; Clinical genetics; Klinisk genetik; Pathology; patologi;

   Sammanfattning : IgG, IgM and IgE in complex with antigen have the capacity to regulate specific immune responses. In this investigation, the role of Fc receptors for IgG (FcγRI, FcγRII and FcγRIII) and complement receptors 1 and 2 (CR1/2) for antibody-mediated enhancement of antibody responses are investigated. LÄS MER

7. 5. Antibody Feedback Regulation and T Cells

   Författare :Fredrik Carlsson; Birgitta Heyman; Alf Grandien; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Fc receptors; B cell; T cell; antigen presentation; complement receptors; complement; IgE; IgG3; CD23; antibody; Immunology; Immunologi;

   Sammanfattning : Antibodies, passively administered or actively produced, regulate immune responses to the antigen they recognize. This phenomenon is called antibody-mediated feedback regulation. Feedback regulation can be positive or negative, resulting in >1000-fold enhancement or >99% suppression of the specific antibody response. LÄS MER