A pilot study of estrogen's effects on bronchial myocyte adhesion molecule expression

We examined the effects of estrogen on tumor necrosis factor alpha (TNF-alpha)-induced expression of intracellular adhesion molecule (ICAM-1) and vascular adhesion molecule (VCAM-1) in cultured human bronchial smooth muscle cells (BSMC). Experiments were performed in triplicate in T-75 tissue cultur...

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Published inPharmacotherapy Vol. 19; no. 12; p. 1426
Main Authors Dickens, G R, Matheny, C J, Morris, P E, Clifton, G D, Ensom, M H
Format Journal Article
LanguageEnglish
Published United States 01.12.1999
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Abstract We examined the effects of estrogen on tumor necrosis factor alpha (TNF-alpha)-induced expression of intracellular adhesion molecule (ICAM-1) and vascular adhesion molecule (VCAM-1) in cultured human bronchial smooth muscle cells (BSMC). Experiments were performed in triplicate in T-75 tissue culture flasks containing normal human BSMC. Four experiments were carried out: untreated BSMC cells (control); TNF-alpha 1000 U/ml stimulation of BSMC; forskolin 5 microM before TNF-alpha stimulation of BSMC; and estradiol 30 microM before TNF-alpha stimulation of BSMC. Cyclic adenosine monophosphate was measured by a commercially available radioimmunoassay kit. Cell expression of ICAM-1 and VCAM-1 was quantified by flow cytometry Incubation of cells with TNF-alpha 1000 U/ml for 24 hours elicited a 27-fold increase in basal expression of ICAM-1 and a 2-fold increase in VCAM-1 (p>0.05). Incubation of BSMC with forskolin 5 microM, for 1 hour before TNF-alpha, decreased TNF-alpha-induced expression of ICAM-1 by 62% and VCAM-1 slightly by 17%. The BSMC incubated with estradiol 30 microM, 1 hour before TNF-alpha, decreased TNF-alpha-induced expression of ICAM-1 by 21%; VCAM-1 remained unchanged (p>0.05). We found a trend toward inhibition of TNF-alpha-stimulated ICAM-1 expression in cultured BSMC with pretreatment with estradiol. However, due to large variability within the cell culture model, statistical significance was not reached.
AbstractList We examined the effects of estrogen on tumor necrosis factor alpha (TNF-alpha)-induced expression of intracellular adhesion molecule (ICAM-1) and vascular adhesion molecule (VCAM-1) in cultured human bronchial smooth muscle cells (BSMC). Experiments were performed in triplicate in T-75 tissue culture flasks containing normal human BSMC. Four experiments were carried out: untreated BSMC cells (control); TNF-alpha 1000 U/ml stimulation of BSMC; forskolin 5 microM before TNF-alpha stimulation of BSMC; and estradiol 30 microM before TNF-alpha stimulation of BSMC. Cyclic adenosine monophosphate was measured by a commercially available radioimmunoassay kit. Cell expression of ICAM-1 and VCAM-1 was quantified by flow cytometry Incubation of cells with TNF-alpha 1000 U/ml for 24 hours elicited a 27-fold increase in basal expression of ICAM-1 and a 2-fold increase in VCAM-1 (p>0.05). Incubation of BSMC with forskolin 5 microM, for 1 hour before TNF-alpha, decreased TNF-alpha-induced expression of ICAM-1 by 62% and VCAM-1 slightly by 17%. The BSMC incubated with estradiol 30 microM, 1 hour before TNF-alpha, decreased TNF-alpha-induced expression of ICAM-1 by 21%; VCAM-1 remained unchanged (p>0.05). We found a trend toward inhibition of TNF-alpha-stimulated ICAM-1 expression in cultured BSMC with pretreatment with estradiol. However, due to large variability within the cell culture model, statistical significance was not reached.
Author Clifton, G D
Dickens, G R
Ensom, M H
Matheny, C J
Morris, P E
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Snippet We examined the effects of estrogen on tumor necrosis factor alpha (TNF-alpha)-induced expression of intracellular adhesion molecule (ICAM-1) and vascular...
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StartPage 1426
SubjectTerms Bronchi - drug effects
Bronchi - metabolism
Cells, Cultured
Colforsin - pharmacology
Cyclic AMP - biosynthesis
Estradiol - pharmacology
Flow Cytometry
Humans
Intercellular Adhesion Molecule-1 - metabolism
Muscle, Smooth - drug effects
Muscle, Smooth - metabolism
Pilot Projects
Radioimmunoassay
Time Factors
Tumor Necrosis Factor-alpha - pharmacology
Vascular Cell Adhesion Molecule-1 - metabolism
Title A pilot study of estrogen's effects on bronchial myocyte adhesion molecule expression
URI https://www.ncbi.nlm.nih.gov/pubmed/10600091
Volume 19
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