蛋白过敏性研究——BN大鼠动物模型

目的　用BN大鼠模型探讨不同蛋白的过敏性。方法　通过腹腔注射 (1mg ml)或口服 (10mg ml)给予BN大鼠卵清蛋白 (OVA)或牛血清白蛋白 (BSA) ,时间为 6周。在不同时间取血清 ,进行被动皮肤致敏试验 (PCA) ;分离血浆进行组胺测定 ;此外 ,对OVA组和对照组的大鼠进行血压测定。结果　PCA试验结果表明OVA特异性IgE抗体滴度较高 (1 32～ 1 12 8) ,而BSA特异性IgE抗体滴度较低 (1 2～ 1 4 )。与对照组相比 ,腹腔注射或口服OVA均使组胺水平升高。口服OVA对大多数大鼠的血压没有明显的影响 ,然而 ,有 2只大鼠收缩压暂时降低。结论　该研究结果表明BN大鼠模型可能是一种较理想的蛋白过敏性模型。

Determination of protein allergenicity--BN rat model

Objective Protein allergenicity was investigated in BN rat model. Methods OVA or BSA was administered i.p.(1mg/ml) or orally (10mg/ml) to male BN rats for 6 weeks. In different intervals, blood samples were obtained from the orbital plexus for PCA and histamine determination. In addition, blood pressure of rats in OVA-treated group and control group was measured. Results Relatively high titres (1/32-1/128) IgE responses were provoked by administration of OVA, while BSA stimulated only low titres (1/2-1/4)IgE. Compared with the controls, the plasma histamine concentrations of OVA groups were higher. An oral challenge with OVA did not induce a clear effect on blood pressure in the majority of rats. However, two rats demonstrated a temporary drop in blood pressure.Conclusion BN rat model may be a suitable animal model to determine protein allergenicity.