Improved method to raise polyclonal antibody using enhanced green fluorescent protein transgenic mice

A novel strategy for rapid construction of libraries of full-length antibodies highly expressed on mammalian cell surfaces

Development of a versatile mammalian display system is essential for the selection of functional human antibodies with high affinities. Here we described a novel strategy for rapid construction of full-length antibody libraries that could be efficiently expressed on mammalian cell surfaces. The universal vector pDGB-HC-TM was constructed by inserting multiple cloning site unique sequences recognized by restriction endonucleases BsmBI, SfiI, and BstXI for the pop-in and pop-out of genes of interest. Cytomegalovirus promoter, a commonly used promoter for high expression of proteins in a variety of mammalian cells, was used to drive expression of the inserted antibody genes and a transmembrane domain from platelet-derived growth factor receptor was fused in frame to the C-terminus of heavy chain consistent region to anchor the antibody expressed on the mammalian cell surface. Using this strategy, we constructed a full-length human antibody display library. DNA sequence analysis and expression analysis indicated that the library constructed had a combinatory expressible, detectable diversity of 6.58 x 10(10).

Expression of Cbl-interacting protein of 85 kDa in MPTP mouse model of Parkinson's disease and 1-methyl-4-phenyl-pyridinium ion-treated dopaminergic SH-SY5Y cells

The newly discovered Cbl-interacting protein of 85 kDa (CIN85) is involved in many cellular processes, but its functions in the brain and in neurodegenerative diseases remain unclear. In this paper, we investigated the distribution of CIN85 protein in different regions of adult mouse brain using Western blot analysis and immunohistochemistry, and found that CIN85 was ubiquitously expressed in mouse brain. In the striatum and substantia nigra, two regions most deeply affected in Parkinson's disease, the level of CIN85 protein was relatively high. In the MPTP mouse model of Parkinson's disease, the expression of CIN85 in the striatum and substantia nigra was complicated. But in 1-methyl-4-phenyl-pyridinium ion-treated human dopaminergic SH-SY5Y cells, the expression of CIN85 increased dramatically. Knocking down of CIN85 by short hairpin RNA reduced SH-SY5Y cell death. Therefore, CIN85 might play different roles in the dopaminergic cell line and in the nigrostriatum of mouse brain under neurotoxin challenge.