Serotonin Increases Interleukin-6 Release and Decreases Tumor Necrosis Factor Release from Rat Adrenal Zona Glomerulosa Cells in Vitro

Overview

Journal Endocrine

Specialty Endocrinology

Date 2010 Dec 15

PMID 21153080

Citations 2

Authors

P K Ritchie

H H Knight

M Ashby

A M Judd

Affiliations

Soon will be listed here.

Abstract

Interleukin-6 (IL-6) and tumor necrosis factor (TNF) are secreted by rat adrenal zona glomerulosa cells. Serotonin increases the release of aldosterone, corti-costerone, and cortisol from the adrenal cortex. Therefore, the effects of serotonin on IL-6 and TNF release from rat adrenal zona glomerulosa cells were investigated. Cultures of rat adrenal zona glomerulosa cells were enzymatically prepared and cultured for 4-6 d. The cells were then exposed to serum-free RPMl-1640 medium containing vehicle (RPMl medium alone), serotonin, and/or endotoxin, interleukin-1β, or adrenocorticotrophic hormone (ACTH). Following a 5-h incubation, medium was removed from the cells, and IL-6 and TNF content of this medium determined with bioassays. Serotonin (1-1000 nM) increased basal IL-6 release from zona glomerulosa cells, but inhibited basal TNF release from these cells. Endotoxin and interleukin-1β (IL-1β) increased IL-6 and TNF release from zona glomerulosa cells. Serotonin potentiated IL-6 release stimulated by endotoxin and IL-1β, but inhibited TNF release stimulated by these agents. Serotonin potentiated ACTH-stimulated IL-6 release. Serotonin had no effect on IL-6 release from rat anterior pituitary cells. Because IL-6, TNF, and serotonin modify the release of aldosterone and glucocorticoids from adrenal cells, the stimulatory effects of serotonin on aldosterone and glucocorticoid release may be mediated in part by the effects of serotonin on IL-6 and TNF release from adrenal cells.

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