Plasma and rectal adenosine in inflammatory bowel disease: effect of methotrexate.

Plasma and rectal adenosine in inflammatory bowel disease: effect of methotrexate.
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炎症性肠病中的血浆和直肠腺苷:甲氨蝶呤的作用。

DOI:
10.1097/00054725-199908000-00004
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发表时间:
1999
影响因子:
4.9
通讯作者:
Lipsky,JJ
Lipsky,JJ
中科院分区:
医学2区
文献类型:
--
作者:
Egan,LJ;Sandborn,WJ;Mays,DC;Tremaine,WJ;Lipsky,JJ

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在动物模型中,甲氨蝶呤的抗肿瘤作用机制归因于内源性autocoid腺苷的细胞外浓度升高。我们的目标是确定甲氨蝶呤是否升高炎症性肠病患者血浆和疾病部位的腺苷浓度。在10例克罗恩病或溃疡性结肠炎患者中,在皮下注射甲氨蝶呤(15或25 mg)之前和之后立即测量直肠腺苷和血浆腺苷浓度。平均给药前直肠腺苷浓度2.4 μmol/l与给药后浓度2.1 μmol/l无显著差异,p = 0.17(配对双尾t检验)。直肠腺苷浓度倾向于与直肠内镜疾病活动性相关,r= 0.59,p = 0.067(斯皮尔曼等级相关性)。甲氨蝶呤注射后,无论是平均每日血浆腺苷浓度,也没有血浆腺苷在任何个别时间点,显着不同,从注射前的值。在炎症性肠病患者中,注射临床有效剂量范围内的甲氨蝶呤不会升高直肠或血浆腺苷浓度。不支持腺苷作为甲氨蝶呤抑制作用的介体的作用。
In animal models, the antiinflammatory mechanism of action of methotrexate has been attributed to elevation of the extracellular concentration of the endogenous autocoid, adenosine. Our goal was to determine if methotrexate elevates adenosine concentrations in plasma and at the site of disease in patients with inflammatory bowel disease. In 10 patients with Crohn's disease or ulcerative colitis, rectal adenosine and plasma adenosine concentrations were measured before and immediately after a subcutaneous injection of methotrexate, 15 or 25 mg. The mean predose rectal adenosine concentration of 2.4 μmol/l was not significantly different from the postdose concentration of 2.1 μmol/l, p = 0.17, (paired two-tailedttest). Rectal adenosine concentration tended to correlate with rectal endoscopic disease activity,r= 0.59, p = 0.067 (Spearman rank order correlation). After methotrexate injection, neither the mean daily plasma adenosine concentration, nor the plasma adenosine at any individual time point, were significantly different from preinjection values. In patients with inflammatory bowel disease, an injection of methotrexate in the clinically effective dose range does not raise rectal or plasma adenosine concentrations. A role for adenosine as the mediator of the antiinflammatory action of methotrexate is not supported.
开始接受甲氨蝶呤治疗的类风湿性关节炎患者的中性粒细胞离体白三烯 B4 合成受到急性和慢性抑制。
DOI: 10.1002/art.1780350403
发表时间: 1992
影响因子: --
作者:
Sperling,RI;Benincaso,AI;Anderson,RJ;Coblyn,JS;Austen,KF;Weinblatt,ME
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DOI: 10.4049/jimmunol.148.7.2201
发表时间: 1992-04
影响因子: 4.4
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DOI: 10.1016/0006-291x(73)90949-2
发表时间: 1973-01-01
影响因子: 3.1
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通讯作者: NAIR, MG
DOI: 10.1136/bmj.1.5375.89
发表时间: 1964-01-01
影响因子: --
作者:
BARON, JH;CONNELL, AM;LENNARDJONES, JE
通讯作者: LENNARDJONES, JE
DOI: --
发表时间: 1988-07
期刊: The Journal of biological chemistry
影响因子: --
作者:
J. Appleman;N. Prendergast;T. Delcamp;J. Freisheim;Raymond L. Blakley
通讯作者: J. Appleman;N. Prendergast;T. Delcamp;J. Freisheim;Raymond L. Blakley