PMID- 11084220 OWN - NLM STAT- MEDLINE DCOM- 20010116 LR - 20190826 IS - 0165-1781 (Print) IS - 0165-1781 (Linking) VI - 96 IP - 3 DP - 2000 Nov 20 TI - The effects of noradrenaline and alpha-2 adrenoceptor agents on the production of monocytic products. PG - 245-53 AB - There are some reports that catecholamines may modulate the production of monocytic cytokines such as interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF alpha). The present study was carried out in order to examine the effects of noradrenaline (10(-5), 10(-6) and 10(-7) M), clonidine (10(-5), 10(-6) and 10(-7) M), an alpha2-adrenoceptor agonist, and yohimbine (10(-5), 10(-6) and 10(-7) M), an alpha 2-adrenoceptor antagonist, on the production of IL-6, the IL-1 receptor antagonist (IL-1RA) and TNF alpha by stimulated whole blood of normal humans. We measured the in vitro production of IL-6, TNF alpha and IL-1RA by stimulated (phytohemagglutinin+lipopolysaccharide), diluted whole blood of 16 normal volunteers. The results show that noradrenaline, 10(-5) M, significantly suppressed the production of IL-6; noradrenaline, 10(-5) and 10(-6) M, significantly suppressed the production of IL-1RA and TNF alpha; clonidine, 10(-5) M, significantly suppressed the production of TNF alpha; and yohimbine, 10(-5) and 10(-6) M, significantly suppressed the production of IL-1RA. It is concluded that (1) noradrenaline has significant negative immunoregulatory effects in humans through suppression of the production of (monocytic) proinflammatory cytokines, e.g. IL-6 and TNF alpha, and (2) the suppression of the production of TNF alpha may be related to alpha(2)-adrenoceptor-related mechanisms. FAU - Maes, M AU - Maes M AD - Department of Psychiatry & Neuropsychology, University Hospital of Maastricht, P.O. Box 5800, AZ 6202 Maastricht, The Netherlands. crc-mh@online.be FAU - Lin, A AU - Lin A FAU - Kenis, G AU - Kenis G FAU - Egyed, B AU - Egyed B FAU - Bosmans, E AU - Bosmans E LA - eng PT - Journal Article PL - Ireland TA - Psychiatry Res JT - Psychiatry research JID - 7911385 RN - 0 (Adrenergic alpha-2 Receptor Agonists) RN - 0 (Adrenergic alpha-2 Receptor Antagonists) RN - 0 (Adrenergic alpha-Agonists) RN - 0 (Adrenergic alpha-Antagonists) RN - 0 (IL1RN protein, human) RN - 0 (Immunosuppressive Agents) RN - 0 (Interleukin 1 Receptor Antagonist Protein) RN - 0 (Interleukin-6) RN - 0 (Sialoglycoproteins) RN - 0 (Tumor Necrosis Factor-alpha) RN - 2Y49VWD90Q (Yohimbine) RN - MN3L5RMN02 (Clonidine) RN - X4W3ENH1CV (Norepinephrine) SB - IM MH - *Adrenergic alpha-2 Receptor Agonists MH - *Adrenergic alpha-2 Receptor Antagonists MH - Adrenergic alpha-Agonists/pharmacology MH - Adrenergic alpha-Antagonists/pharmacology MH - Adult MH - Clonidine/pharmacology MH - Female MH - Humans MH - Immune Tolerance MH - Immunosuppressive Agents/metabolism MH - In Vitro Techniques MH - Interleukin 1 Receptor Antagonist Protein MH - Interleukin-6/*biosynthesis MH - Male MH - Middle Aged MH - Monocytes/drug effects/*metabolism MH - Norepinephrine/*metabolism MH - Sialoglycoproteins/*biosynthesis/drug effects MH - Stress, Psychological/immunology/*metabolism MH - Tumor Necrosis Factor-alpha/*biosynthesis/drug effects MH - Yohimbine/pharmacology EDAT- 2000/11/21 11:00 MHDA- 2001/02/28 10:01 CRDT- 2000/11/21 11:00 PHST- 2000/11/21 11:00 [pubmed] PHST- 2001/02/28 10:01 [medline] PHST- 2000/11/21 11:00 [entrez] AID - S0165-1781(00)00216-X [pii] AID - 10.1016/s0165-1781(00)00216-x [doi] PST - ppublish SO - Psychiatry Res. 2000 Nov 20;96(3):245-53. doi: 10.1016/s0165-1781(00)00216-x.