INTRODUCTIONSialyl Lewis-X antigen ,correlated with carcinoma, is a group of carbohydrate antigen containing oligosaccharide expressed of embryonic tisue and glycoproteins on cell surface of embryonic tissue[1].The SL...INTRODUCTIONSialyl Lewis-X antigen ,correlated with carcinoma, is a group of carbohydrate antigen containing oligosaccharide expressed of embryonic tisue and glycoproteins on cell surface of embryonic tissue[1].The SLeX antigen located on cell surface is synthesized principally by two enzymes ,al ,3fucosyltransfrease and a2, 3sialyctransferase.In adults ,SLeX antigen is expressed principally on the surfaces of granulocytic cells and some tumor cells .展开更多
AIM To determine whether proliferating cell nuclear antigen (PCNA) is present in the peripheral circulation and whether PCNA levels correlate with enhanced regenerative activity.METHODS In animal studies, adult male S...AIM To determine whether proliferating cell nuclear antigen (PCNA) is present in the peripheral circulation and whether PCNA levels correlate with enhanced regenerative activity.METHODS In animal studies, adult male Sprague-Dawley rats (n=3-4/ group) were sacrificed at 0, 12, 24, 36, 48, 72 and 96 hours following 70% partial hepatectomy. At each interval, sera were analyzed by Western blot for PCNA by two monoclonal antibodies (PC-10 and 19F-4). In human studies, sera from 4 patients with liver cirrhosis and 4 healthy controls were tested in a similar manner.RESULTS The PC-10 monoclonal antibody identified a protein with a molecular mass of 120 KD which remained stable in rat sera for 24 hours following partial hepatectomy, then increased 1.5-fold at 48 hours prior to returning to baseline at 96 hours after partial hepatectomy. However, it was not detected in the sera of patients with or without liver disease. In the 19F-4 monoclonal antibody, a protein with a molecular mass of approximately 46 KD was found. which was present in rat sera prior to partial hepatectomy and for 12 hours after surgery. Thereafter, levels fell by approximately 50% at 24 hours, 65% at 36 hours and 75% at 48 hours where they remained until 96 hours after partial hepatectomy. The decrease in levels correlated with the extent of partial hepatectomy. In human sera, the appearance of this inhibitory cell nuclear antigen (ICNA) was higher in the sera of patients with cirrhosis than in healthy controls.CONCLUSION The PC-10 monoclonal antibody can detect a protein in the circulation when active hepatic regenerative activity is taking place. The 19F-4 monoclonal antibody, however, identifies a protein in both rat and human sera that inversely correlates with hepatic regenerative activity. This protein which is tentatively referred to as inhibitory cell nuclear antigen (ICNA) may be used in documenting the extent of suppression of hepatic regeneration.展开更多
目的制备抗重组人肝再生增强因子(recombinant human augmenter of liver regeneration,rhALR)单克隆抗体,鉴定其特性,为建立一种稳定、特异及简便的临床检测方法奠定基础。方法以纯化的rhALR免疫Balb/c小鼠,通过细胞融合建立能稳定分泌...目的制备抗重组人肝再生增强因子(recombinant human augmenter of liver regeneration,rhALR)单克隆抗体,鉴定其特性,为建立一种稳定、特异及简便的临床检测方法奠定基础。方法以纯化的rhALR免疫Balb/c小鼠,通过细胞融合建立能稳定分泌抗rhALR单抗的杂交瘤细胞株,间接ELISA方法和Western blot方法鉴定McAb特异性并对杂交瘤细胞的染色体进行分析。采用快速定性试纸鉴定McAb的Ig亚类,间接ELISA方法检测McAb的效价及亲和常数。结果筛选出一株可分泌特异性McAb的杂交瘤细胞2A6;其抗体亚类重链为IgG2b,轻链为К链,腹水效价为10-6;亲和常数为3.19×107。间接ELISA法和Western bolt检测证明这株杂交瘤细胞所分泌的McAb特异性良好。结论成功制备出高效价的抗rhALR单克隆抗体,为建立一种稳定、可靠的ALR检测方法,以便深入研究ALR在肾脏疾病中的作用奠定基础。展开更多
文摘INTRODUCTIONSialyl Lewis-X antigen ,correlated with carcinoma, is a group of carbohydrate antigen containing oligosaccharide expressed of embryonic tisue and glycoproteins on cell surface of embryonic tissue[1].The SLeX antigen located on cell surface is synthesized principally by two enzymes ,al ,3fucosyltransfrease and a2, 3sialyctransferase.In adults ,SLeX antigen is expressed principally on the surfaces of granulocytic cells and some tumor cells .
文摘AIM To determine whether proliferating cell nuclear antigen (PCNA) is present in the peripheral circulation and whether PCNA levels correlate with enhanced regenerative activity.METHODS In animal studies, adult male Sprague-Dawley rats (n=3-4/ group) were sacrificed at 0, 12, 24, 36, 48, 72 and 96 hours following 70% partial hepatectomy. At each interval, sera were analyzed by Western blot for PCNA by two monoclonal antibodies (PC-10 and 19F-4). In human studies, sera from 4 patients with liver cirrhosis and 4 healthy controls were tested in a similar manner.RESULTS The PC-10 monoclonal antibody identified a protein with a molecular mass of 120 KD which remained stable in rat sera for 24 hours following partial hepatectomy, then increased 1.5-fold at 48 hours prior to returning to baseline at 96 hours after partial hepatectomy. However, it was not detected in the sera of patients with or without liver disease. In the 19F-4 monoclonal antibody, a protein with a molecular mass of approximately 46 KD was found. which was present in rat sera prior to partial hepatectomy and for 12 hours after surgery. Thereafter, levels fell by approximately 50% at 24 hours, 65% at 36 hours and 75% at 48 hours where they remained until 96 hours after partial hepatectomy. The decrease in levels correlated with the extent of partial hepatectomy. In human sera, the appearance of this inhibitory cell nuclear antigen (ICNA) was higher in the sera of patients with cirrhosis than in healthy controls.CONCLUSION The PC-10 monoclonal antibody can detect a protein in the circulation when active hepatic regenerative activity is taking place. The 19F-4 monoclonal antibody, however, identifies a protein in both rat and human sera that inversely correlates with hepatic regenerative activity. This protein which is tentatively referred to as inhibitory cell nuclear antigen (ICNA) may be used in documenting the extent of suppression of hepatic regeneration.
文摘目的制备抗重组人肝再生增强因子(recombinant human augmenter of liver regeneration,rhALR)单克隆抗体,鉴定其特性,为建立一种稳定、特异及简便的临床检测方法奠定基础。方法以纯化的rhALR免疫Balb/c小鼠,通过细胞融合建立能稳定分泌抗rhALR单抗的杂交瘤细胞株,间接ELISA方法和Western blot方法鉴定McAb特异性并对杂交瘤细胞的染色体进行分析。采用快速定性试纸鉴定McAb的Ig亚类,间接ELISA方法检测McAb的效价及亲和常数。结果筛选出一株可分泌特异性McAb的杂交瘤细胞2A6;其抗体亚类重链为IgG2b,轻链为К链,腹水效价为10-6;亲和常数为3.19×107。间接ELISA法和Western bolt检测证明这株杂交瘤细胞所分泌的McAb特异性良好。结论成功制备出高效价的抗rhALR单克隆抗体,为建立一种稳定、可靠的ALR检测方法,以便深入研究ALR在肾脏疾病中的作用奠定基础。
