Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Szekeres-Bartho, J; Polgar, B; Kozma, N; Miko, E; Par, G; Szereday, L; Barakonyi, A; Palkovics, T; Papp, O; Varga, P.
Progesterone-dependent immunomodulation.
Chem Immunol Allergy. 2005; 89:118-125
Doi: 10.1159/000087953
PubMed
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- Co-Autor*innen der Med Uni Graz
- Kozma Noemi
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- Abstract:
- The biological effects of progesterone are mediated by a 34-kDa protein named the progesterone-induced blocking factor (PIBF). PIBF, synthesized by lymphocytes of healthy pregnant women in the presence of progesterone, inhibits arachidonic acid release as well as NK activity, and modifies the cytokine balance. Within the cell the full-length PIBF is associated with the centrosome, while secretion of shorter forms is induced by activation of the cell. PIBF induces nuclear translocation of STAT6 as well as PKC phosphorylation and exerts a negative effect on STAT4 phosphorylation. The concentration of PIBF in pregnancy urine is related to the positive or negative outcome of pregnancy; furthermore, premature pregnancy termination is predictable by lower than normal pregnancy PIBF values. In vivo data suggest the biological importance of the above findings. Treatment of pregnant Balb/c mice with the antiprogesterone RU 486 results in an increased resorption rate, which is associated with the inability of spleen cells to produce PIBF. High resorption rates induced by progesterone receptor block as well as those due to high NK activity are corrected by simultaneous PIBF treatment.
- Find related publications in this database (using NLM MeSH Indexing)
- Abortifacient Agents, Steroidal - pharmacology
- Animals -
- Cytokines - metabolism
- Female -
- Humans -
- Immunologic Factors - metabolism
- Killer Cells, Natural - immunology
- Mice -
- Mifepristone - pharmacology
- Pregnancy -
- Pregnancy Outcome -
- Pregnancy Proteins - immunology Pregnancy Proteins - urine
- Progesterone - immunology
- Signal Transduction -
- Suppressor Factors, Immunologic - urine