Human endometrial interleukin-6 (IL-6): in vivo messenger ribonucleic acid expression, in vitro protein production, and stimulation thereof by IL-1 beta

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This paper investigated human endometrial IL-6 mRNA expression in vivo and IL-6 protein production in vitro, finding that IL-1β stimulates its production.

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Abstract

OBJECTIVE: To investigate human endometrial interleukin-6 (IL-6) expression and effects thereon by IL-1 beta. DESIGN: Prospective. SETTING: Academic medical center. PATIENT(S): Endometrial biopsy specimens from normal volunteers (n = 20) at four specific menstrual stages were used for in vivo study. Endometrial specimens for in vitro study were obtained from patients (n = 19) undergoing gynecologic surgery. INTERVENTION(S): Time and dose-response treatment of endometria with IL-1 beta in tissue culture. MAIN OUTCOME MEASURE(S): In vivo IL-6 messenger RNA expression by Northern analysis and in vitro endometrial IL-6 protein production by assay of the conditioned media. RESULT(S): Midsecretory and late secretory phase endometria expressed more IL-6 messenger RNA than late proliferative phase endometria in vivo. Similarly in vitro, in pg/mg endometrium per hour secretory endometria IL-6 protein production, 25.7 +/- 7.1 (mean +/- SEM), exceeded that of proliferative endometria, 4.7 +/- 1.0. With IL-1 beta treatment, secretory endometria IL-6 protein production exceeded that of proliferative endometria. Interleukin-1 beta stimulated endometrial IL-6 protein production in time- and dose-dependent manners. CONCLUSION(S): Human endometrial IL-6 expression varies with the menstrual cycle, occurs more highly in secretory endometria, and in vitro is stimulated by interleukin-1 beta. Human endometrial IL-6 may therefore mediate some actions of IL-1 beta involving the endometrium and trophoblast.

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MeSH descriptors

Endometrium Gene Expression Interleukin-1 Interleukin-6 Interleukin-6 RNA, Messenger Adolescent Adult Blotting, Northern Culture Techniques Endometrium Female Humans Interleukin-1 Interleukin-6 Menstrual Cycle RNA, Messenger

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openalex
last seen: 2026-05-13T18:38:08.563906+00:00
pubmed
last seen: 2026-10-08T21:59:55.756364+00:00
unpaywall
last seen: 2026-09-17T06:32:46.214484+00:00
License: CC0 · commercial use OK