SRBC致敏对大鼠脾脏淋巴细胞β-受体的影响  

Effects of SRBC immunization on beta-adrenoceptors in lymphocytes isolated from the spleens of rats

作　　者：葛志东[1] 陈敏珠[1] 徐叔云[1] 

机构地区：[1]安徽医科大学临床药理研究所,合肥230032

出　　处：《中国免疫学杂志》1991年第6期352-354,共3页Chinese Journal of Immunology

基　　金：国家自然科学基金

摘　　要：用受体结合实验测定大鼠脾脏淋巴细胞β-受体Bmax和Kd。5×10~9个SRBC ip大鼠后,d1 Bmax比对照组明显升高,d2达峰值,以后逐渐下降,d6降至对照水平。+d1-+d3 β-受体Bmax与72h后血清IgM量高度正相关(r=0.86),ipl.8 mg/kg普萘洛尔后,+d2 Bmax和+d5血清IgM量平行降低。在体外诱生抗体中,10μmol/LNE显著提高诱生的IgM量。可被1μmoI/L普萘洛尔阻断。上述结果表明:(1)SRBC致敏上行调节大鼠脾脏淋巴细胞β-受体密度;(2)脾脏淋巴细胞β-受体Bmax的上行调节可能促进其IgM的合成;(3)NE促进脾淋巴细胞IgM合成通过β-受体介导。The Bmax and Kd of beta-adrenoceptors in splenie lymphocytes of rats were determined by direct binding of radioligand, ~3H-dihydroalpranolol. Bmax of beta-adrenoceptors was significantly increased on day+1, was peak on day+2 and gradually reduced to control values on day+ 6 after the intraperitoneal injection of 5×10~9SRBC. A positive correlation (r=0. 86) was found between the Bmax of beta-adrtenoceptors on day+1 to+3 and the amount of Ig M in s(?)rum after 72 hours. Both the Bmax of beta-adrenoceptors on day+2 and the amount of Ig M in serum on day+5 were reduced by the intraperitoneal injection of propranolol. In study on antibody response to SRBC.in vitro, Ig M Synthesis in mouse spleen cells was enhanced by norepinephrine (10μmol/L), and blocked by propranolol (1μmol/L). These results indicated that: (1) the immune response to SRBC in vivo up-regulates the density of beta-adrenoceptors in splenic lymphocytes; (2) the up-regulation of Bmax of beta-adrenceptors in splenic lymphocytes may increase its Ig M synthesis;(3) the enhancement of the Ig M antibody response to SRBC in vitro by norepinephrine was mediated by the beta-adrenoceptors.

关 键 词：脾脏 淋巴细胞 SRBC 

分 类 号：R392.12[医药卫生—免疫学]