Sökning: "negative feedback regulation"

Visar resultat 1 - 5 av 58 avhandlingar innehållade orden negative feedback regulation.

  1. 1. 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

  3. 2. Regulation of B cell development by antigen receptors

    Författare :Jannek Hauser; Thomas Grundström; Yuan Zhuang; Umeå universitet; []
    Nyckelord :calcium; calmodulin; e-proteins; E2A; B cell development; antigen receptor signaling; surrogate light chains; RAG; allelic exclusion; V D J recombination; AID; negative feedback regulation; plasma cell differentiation;

    Sammanfattning : The developmental processes of lymphopoiesis generate mature B lymphocytes from hematopoietic stem cells through increasingly restricted intermediates. Networks of transcription factors regulate these cell fate choices and are composed of both ubiquitously expressed and B lineage-specific factors. LÄS MER

  4. 3. Regulation of innate and adaptive immune responses by Gram-positive and Gram-negative bacteria

    Författare :Anna Martner; Göteborgs universitet; []
    Nyckelord :Gram-positive; Gram-negative bacteria; Streptococcus pneumoniae; IL-12; autolysin; pneumolysin; CD4 T cells; monocytes macrophages; dendritic cells;

    Sammanfattning : Bacteria are classified as Gram-positive or Gram-negative, depending on their cell wall structure. The role of the bacterial cell wall in immune regulation is the focus of the current work. Most Gram-positive bacteria stimulate monocytes to produce large amounts of IL-12. LÄS MER

  5. 4. The brain-pituitary-gonadal axis of the three-spined stickleback, Gasterosteus aculeatus

    Författare :Yi Ta Shao; Bertil Borg; Sylvie Dufou; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; BPG axis; GnRH; lh-β; fsh-β; three-spined stickleback; Gasterosteus aculeatus; homeostasis; feedback; funktionell zoomorfologi; Functional Zoomorphology;

    Sammanfattning : The seasonal reproduction of the three-spined stickleback is stimulated by long day photoperiod. As in other vertebrates, the reproductive system of stickleback is regulated by the brain-pituitary-gonadal (BPG) axis which is largely controlled by feedback effects. Both negative and positive feedback effects on the BPG axis have been found in fish. LÄS MER

  7. 5. The Cerebello-Olivary Feedback System

    Författare :Fredrik Bengtsson; Neurofysiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; neuropsykologi; neurofysiologi; neurophysiology; Neurology; neuropsychology; Fysiologi; Physiology; Cerebellum; Purkinje cell; Inferior olive; Neurologi; Nucleo-olivary; Climbing fibre.; Deep cerebellar nuclei;

    Sammanfattning : The pathway from the deep cerebellar nuclei to the inferior olive, the nucleo-olivary pathway, is known to be inhibitory. The physiological and temporal properties, as well as the localisation, of the nucleo-olivary pathway were characterised in the decerebrate ferret. LÄS MER