Increased proinflammatory cytokines production by ergotamine in male BALB/c mice

被引:8
|
作者
Filipov, NM [1 ]
Thompson, FN [1 ]
Sharma, RP [1 ]
Dugyala, RR [1 ]
机构
[1] Univ Georgia, Coll Vet Med, Dept Physiol & Pharmacol, Athens, GA 30602 USA
关键词
D O I
10.1080/009841099157359
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The ergopeptine alkaloid ergotamine (ET) mimics the effects of ergopeptine alkaloids round in endophyte-infected (E+) fescue forage considered causative for fescue toxicosis. Altered immune capacity, compromised intake and thermoregulation, and inflammatory changes are observed in fescue toxicosis. Taken together, these suggest the cytokine pattern may be altered by ergot alkaloids. Thus, the objective of this study was to determine whether; major splenocyte-derived cytokines-interleukin 2 (IL-2), interleukin 4 (IL-4), interferon gamma (IFN-gamma)-and macrophage-derived cytokines-interleukin 1 beta, (IL-1 beta), interleukin 6 (IL-6), and tumor necrosis factor alpha (TNF-alpha)-were affected by ergotamine. Two sets of male BALB/c mice (n = 5/treatment) were treated with ergotamine tartrate (sc) for 10 d at doses of 0 (control), 0.4, 2, 10, or 50 mg/kg body weight. Twenty-four hours after the last treatment, splenocytes (S) were isolated from one set of animals and macrophages (MO) from the other set for determination of IL-2, IL-4, INF-gamma, and IL-1 beta, IL-6, TNF-alpha, respectively. Following activation with 5 mu g/ml concanavalin A (Con A) (S) and 10 mu g/ml lipopolysaccharide (LPS) (MO), cells were incubated for 48 and 24 h, respectively, and supernatants were collected and assayed for respective cytokines by enzyme-linked immunosorbent assay (ELISA). Additionally, differential white blood cell (WBC) counts were performed and the neutrophil (N):lymphocyte (L) ratio calculated. Ergotamine treatment significantly increased IL-6 levels at the 2.0 mg/kg dose and greater and TNF-alpha at the highest dose. There was no treatment effect on IL-1 beta, IL-2, IL-4, and IFN-gamma. Also, no effect was observed upon total and differential WBC counts as well as N:L ratio. Ergotamine affected the proinflammatory cytokine IL-6, and this increase may contribute to fescue tosicosis.
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收藏
页码:145 / 155
页数:11
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