Androgen binding site in J111 cell line.

Abstract:

BACKGROUND:The finding of sex steroid receptor protein in non classical reproductive tissues suggested the possibility that sex steroids may have a relevance to the immune system. MATERIAL/METHODS:The J111 cells were maintained in RPMI 1640 complete medium at 37 degrees C in 5% CO2 in air. Cells were resuspended at 1x10(6) cells in 0.2 ml complete medium in 1.5 ml eppendorf tubes. A single saturating concentration 1x10(-9) M of [3H]5alpha-DHT was added to the cells suspension. Unlabelled steroids (5alpha-DHT, 17-beta estradiol, or the synthetic glucocorticoid triamcinolone acetonid) were added over the range 1x10(-8) to 1x10(-9) M. Duplicate tubes were incubated at 37 degrees C for 1h. For autoradiography, the supernatant was discarded and the pellet resuspended in 0.2 ml medium. For binding assay, Labeled cells were separated from unbound steroid by immunomagnetic bead using anti-CD68 antibody. RESULTS:In autoradiography, a population of approximately 96% of J111 cells that contain receptors for androgen has been demonstrated. The results of immunomagnetic showed that binding identified in the J111 cells was modest selective towards androgenic compounds. Schatchard analysis of data showed the KD value of 2.5x10(-9) M and the number of receptor in each cell was found to be 257+/-1. Little competition was seen from 17 beta estradiol or the synthetic glucocorticoid triamcinolone acetonid. CONCLUSIONS:These data indicate that androgen binding in J111 cells is of modest affinity and specific, due to the inability of 100-fold molar excess of estradiol to displace bound [3H]-5alphaDHT.

journal_name

Med Sci Monit

authors

Ahmadi K,McCruden AB

subject

Has Abstract

pub_date

2006-07-01 00:00:00

pages

BR239-44

issue

7

eissn

1234-1010

issn

1643-3750

pii

8643

journal_volume

12

pub_type

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