Inhibition of human polymorphonuclear cell oxidative burst by 17-beta-estradiol and 2,3,7,8-tetrachlorodibenzo-p-dioxin.
OBJECTIVE
Polymorphonuclear cell (PMN) function may be directly influenced by 17-beta-estradiol and the endocrine disruptor, 2,3,7,8-tetrachloro-dibenzo-p-dioxin (TCDD). This may have significant consequences on PMN function within the female reproductive tract. This study evaluated the effects of 17-beta-estradiol and TCDD on PMN oxidative burst.


METHODS
Peripheral blood PMN were isolated from normal male donors. Following treatment with 17-beta-estradiol, TCDD or both, PMN were stimulated with phorbol 12-myristate 13-acetate. Superoxide production was measured by lucigenin-enhanced chemiluminescence.


RESULTS
Following 24-hr culture with either 17-beta-estradiol or TCDD, PMN superoxide production was significantly reduced, however, no such inhibition was observed when PMN were cultured with both estradiol and TCDD. Using antagonists, the estradiol and TCDD effects on PMN superoxide production was shown to be estrogen and aryl hydrocarbon receptor mediated.


CONCLUSIONS
Estradiol and TCDD influence PMN oxidative burst through receptor mediated events. Such altered PMN function may have profound effects upon the normal endometrial cycle.
Abrahams
Vikki M
VM
Department of Microbiology and Immunology, Dartmouth Medical School, 1 Medical Center Drive, Lebanon, NH 03756, USA. vikki.abrahams@yale.edu
Collins
Jane E
JE
Wira
Charles R
CR
Fanger
Michael W
MW
Yeaman
Grant R
GR
D045744:Cell Line, Tumor; D004958:Estradiol / Q000494:pharmacology*; D005260:Female; D006801:Humans; D008297:Male; D009504:Neutrophils / Q000187:drug effects* / Q000378:metabolism; D000072317:Polychlorinated Dibenzodioxins / Q000494:pharmacology*; D018336:Receptors, Aryl Hydrocarbon / Q000037:antagonists & inhibitors / Q000378:metabolism; D011960:Receptors, Estrogen / Q000037:antagonists & inhibitors; D016897:Respiratory Burst / Q000187:drug effects; D013481:Superoxides / Q000378:metabolism
D000072317:Polychlorinated Dibenzodioxins; D018336:Receptors, Aryl Hydrocarbon; D011960:Receptors, Estrogen; D013481:Superoxides; D004958:Estradiol