Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/12762
Title: 17beta-estradiol promotes the synthesis and the secretion of annexin I in the CCRF-CEM human cell line
Authors: Castro-Caldas, Margarida
Duarte, Carlos B.
Carvalho, Arsélio P.
Lopes, M. Celeste
Keywords: Annexin I
17 b-Estradiol
Lymphoblastic cell line
ICI 182,780
Issue Date: Oct-2001
Publisher: Taylor & Francis Ltd
Citation: Mediators of Inflammation. 10:5 (2001) 245-251
Abstract: AIMS: Annexin I (ANXA1), a 37kDa member of the annexin family of Ca2+-binding and phospholipid-binding proteins, is particularly abundant in various populations of peripheral blood leukocytes. Since this protein modulates the anti-inflammatory actions of the steroid hormones, the purpose of this study was to investigate the effects of the female sex steroid hormone, 17beta-estradiol (E2beta), on the synthesis and secretion of ANXA1 in the human CCRF-CEM acute lymphoblastic leukemia cell line. METHODS: Complementary reverse transcription-polymerase chain reaction and Western blot assays were performed to study the effect of E2beta on the expression of mRNA and protein ANXA1, respectively. RESULTS AND DISCUSSION: Treatment of CCRF-CEM cells with E2beta, for 30 min, stimulated the synthesis of ANXA1 mRNA molecules, and increased the cellular level of ANXA1 protein. Moreover, when the cells were incubated with E2beta under the same experimental conditions, a significant increase in the amount of ANXA1 secreted from the cells was also detected. ICI 182,780, a selective inhibitor of the intracellular estrogen receptor, had no effect on the E2beta-stimulated expression and externalisation of ANXA1. Taken together, these results indicate that E2beta induces de novo synthesis of ANXA1 and stimulates its secretion in the CCRF-CEM cell line, apparently through a mechanism independent of the intracellular estrogen receptor
URI: http://hdl.handle.net/10316/12762
ISSN: 0962-9351
Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais
FFUC- Artigos em Revistas Internacionais

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