Abstract |
Estrogen has extensive effects on the immune system. The aim of the present experiments was to compare the effects of 17beta-estradiol (E2) and 4-estren-3alpha,17beta-diol ( estren) on T lymphopoiesis and T cell-dependent inflammation. In order to investigate the role of estrogen receptors (ER) in the effects of E2 and estren on the immune system, ER knock-out mice lacking both ERalpha and ERbeta (DERKO) were used. T lymphopoiesis and T cell-dependent inflammation were studied by investigating thymus cellularity, the delayed-type hypersensitivity (DTH) reaction, CD4(+) T cells in spleen and serum levels of interleukin (IL)-6. As expected, the presence of ERs was mandatory for all the effects of E2. In contrast, treatment with estren reduced thymus cellularity in ER knock-out mice, indicating an effect through ER-independent pathways. Interestingly, estren suppressed only DTH, the frequency of CD4(+) T cells in spleen and serum levels of IL-6 in wild-type (WT) mice, but not in mice lacking ERs. Thus, our study is the first to show that estren inhibits T lymphopoiesis via ER-independent pathways, whereas its suppressive effects on inflammation are ER-dependent.
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Authors | U Islander, M C Erlandsson, T Chavoshi, C Jochems, S Movérare, S Nilsson, C Ohlsson, J-A Gustafsson, H Carlsten |
Journal | Clinical and experimental immunology
(Clin Exp Immunol)
Vol. 139
Issue 2
Pg. 210-5
(Feb 2005)
ISSN: 0009-9104 [Print] England |
PMID | 15654819
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- 4-estren-3,17-diol
- Estrenes
- Interleukin-6
- Receptors, Estrogen
- Estradiol
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Topics |
- Animals
- CD4-Positive T-Lymphocytes
(drug effects, immunology)
- Depression, Chemical
- Estradiol
(blood, immunology)
- Estrenes
(pharmacology)
- Female
- Flow Cytometry
- Hypersensitivity, Delayed
(drug therapy, immunology)
- Interleukin-6
(blood, immunology)
- Lymphopoiesis
(drug effects)
- Male
- Mice
- Mice, Knockout
- Receptors, Estrogen
(immunology)
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