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Intercellular transfer of Ras: Implications for immunity

机译:Ras的细胞间转移:对免疫的影响

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The imidazoline I2 receptor ligand BU99006 binds to and attenuates effects mediated by I2 receptors in vitro, although its effects in vivo have not been studied previously. This study examined the effects of BU99006 in two behavioral assays in rats: hypothermia and 2-BFI discrimination. BU99006 (3.2-15 mg/kg, intraperitoneally) produced a dose-dependent hypothermic effect (rectal temperature), which was antagonized by the I2 receptor antagonist idazoxan. BU99006 (3.2 or 10 mg/kg administered 10 min or 2 h before the session, respectively) did not significantly alter hypothermia produced by the I2 receptor agonist 2-BFI (10 mg/kg). In rats discriminating 5.6 mg/kg 2-BFI, BU99006 (1.78-17.8 mg/kg, intraperitoneally) produced 40 and 82% responding on the 2-BFI-associated lever when it was administered immediately or 2 h before the test sessions, respectively. BU99006 enhanced the discriminative stimulus and rate-suppressing effects of 2-BFI. Collectively, these data suggest that BU99006 is an imidazoline I2 receptor agonist with no evidence of I2 receptor antagonism in rats.
机译:咪唑啉I2受体配体BU99006在体外可结合并减弱I2受体介导的作用,尽管之前尚未对其体内作用进行研究。这项研究检查了BU99006在大鼠的两种行为分析中的作用:体温过低和2-BFI辨别。 BU99006(3.2-15 mg / kg,腹膜内)产生剂量依赖性的体温降低作用(直肠温度),该作用被I2受体拮抗剂艾达唑烷拮抗。 BU99006(分别在疗程前10分钟或2小时施用3.2或10 mg / kg)不会显着改变I2受体激动剂2-BFI(10 mg / kg)产生的体温过低。在区分5.6 mg / kg 2-BFI的大鼠中,BU99006(1.78-17.8 mg / kg,腹膜内)分别在即刻或试验前2小时给予2-BFI相关杠杆产生40%和82%的应答。 。 BU99006增强了2-BFI的歧视性刺激和速率抑制作用。总的来说,这些数据表明BU99006是咪唑啉I 2受体激动剂,在大鼠中没有I 2受体拮抗作用的证据。

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