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Cytokine. 2013 Oct;64(1):351-6. doi: 10.1016/j.cyto.2013.05.017. Epub 2013 Jun 15.

Interleukin-1β (IL-1β) increases pain behavior and the blood glucose level: possible involvement of glucocorticoid system.

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1
Department of Pharmacology, Institute of Natural Medicine, College of Medicine Hallym University, 39 Hallymdaehak-gil, Chuncheon, Gangwon-do 200-702, Republic of Korea.

Abstract

The possible involvement of glucocorticoid system in interleukin-1β (IL-1β)-induced nociception and the blood glucose level was studied in ICR mice. In the first experiment, mice were treated intrathecally (i.t.) with IL-1β (100 pg). Corticotrophin releasing hormone (CRH) mRNA (hypothalamus) and c-Fos mRNA (pituitary gland, spinal cord, and the adrenal gland) levels were measured at 30, 60 and 120 min after IL-1β administration. We found that i.t. injection with IL-1β increased CRH mRNA level in the hypothalamus. The IL-1β administered i.t. elevated c-Fos mRNA levels in the spinal cord, pituitary and adrenal glands. Furthermore, i.t. administration of IL-1β significantly increased the plasma corticosterone level up to 60 min. In addition, the adrenalectomy caused the reductions of the blood glucose level and pain behavior induced by IL-1β injected i.t. in normal and D-glucose-fed groups. Furthermore, intraperitoneal (i.p.) pretreatment with RU486 (100mg/kg) attenuated the blood glucose level and pain behavior induced by IL-1β administered i.t. in normal and D-glucose-fed groups. Our results suggest that IL-1β administered i.t. increases the blood glucose level and pain behavior via an activation of the glucocorticoid system.

KEYWORDS:

Adrenalectomy; Blood glucose; CRH; Glucocorticoid; IL-1β; IP; IT; Interleukin-1β; Signal molecules pathway; corticotrophin releasing hormone; interleukin-1β; intraperitoneal; intrathecal

PMID:
23773309
DOI:
10.1016/j.cyto.2013.05.017
[Indexed for MEDLINE]
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