Development and Characterization of a Novel Anti-idiotypic Monoclonal Antibody to Growth Hormone, Which Can Mimic Physiological Functions of Growth Hormone in Primary Porcine Hepatocytes

  • Lan, Hai-Nan (College of animal science and technology Jilin Agricultural University) ;
  • Jiang, Hai-Long (College of animal science and technology Jilin Agricultural University) ;
  • Li, Wei (State Key Laboratory of Animal Nutrition, China Agricultural University) ;
  • Wu, Tian-Cheng (College of animal science and technology Jilin Agricultural University) ;
  • Hong, Pan (College of animal science and technology Jilin Agricultural University) ;
  • Li, Yu Meng (College of animal science and technology Jilin Agricultural University) ;
  • Zhang, Hui (College of animal science and technology Jilin Agricultural University) ;
  • Cui, Huan-Zhong (College of animal science and technology Jilin Agricultural University) ;
  • Zheng, Xin (College of animal science and technology Jilin Agricultural University)
  • Received : 2014.08.06
  • Accepted : 2014.11.20
  • Published : 2015.04.01


B-32 is one of a panel of monoclonal anti-idiotypic antibodies to growth hormone (GH) that we developed. To characterize and identify its potential role as a novel growth hormone receptor (GHR) agonist, we determined that B-32 behaved as a typical $Ab2{\beta}$ based on a series of enzyme-linked immunosorbent assay assays. The results of fluorescence-activated cell sorting, indirect immunofluorescence and competitive receptor binding assays demonstrated that B-32 specifically binds to the GHR expressed on target cells. Next, we examined the resulting signal transduction pathways triggered by this antibody in primary porcine hepatocytes. We found that B-32 can activate the GHR and Janus kinase (2)/signal transducers and activators of transcription (JAK2/STAT5) signalling pathways. The phosphorylation kinetics of JAK2/STAT5 induced by either GH or B-32 were analysed in dose-response and time course experiments. In addition, B32 could also stimulate porcine hepatocytes to secrete insulin-like growth factors-1. Our work indicates that a monoclonal anti-idiotypic antibody to GH (B-32) can serve as a GHR agonist or GH mimic and has application potential in domestic animal (pig) production.


Supported by : Jilin Agricultural University, Ministry of Science and Technology


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