title: Development of new versions of anti-human CD34 monoclonal antibodies with potentially reduced immunogenicity.
abstract: Despite the widespread clinical use of CD34 antibodies for the purification of human hematopoietic stem/progenitor cells, all the current anti-human CD34 monoclonal antibodies (mAbs) are murine, which have the potential to elicit human antimouse antibody (HAMA) immune response. In the present study, we developed three new mouse anti-human CD34 mAbs which, respectively, belonged to class I, class II and class III CD34 epitope antibodies. In an attempt to reduce the immunogenicity of these three murine mAbs, their chimeric antibodies, which consisted of mouse antibody variable regions fused genetically to human antibody constant regions, were constructed and characterized. The anti-CD34 chimeric antibodies were shown to possess affinity and specificity similar to that of their respective parental murine antibodies. Due to the potentially better safety profiles, these chimeric antibodies might become alternatives to mouse anti-CD34 antibodies routinely used for clinical application.
authors.affiliation: International Joint Cancer Institute, Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, People's Republic of China.
authors.forename: Weizhu
authors.initials: W
authors.lastname: Qian
authors.forename: Ling
authors.initials: L
authors.lastname: Wang
authors.forename: Bohua
authors.initials: B
authors.lastname: Li
authors.forename: Hao
authors.initials: H
authors.lastname: Wang
authors.forename: Sheng
authors.initials: S
authors.lastname: Hou
authors.forename: Xueyu
authors.initials: X
authors.lastname: Hong
authors.forename: Dapeng
authors.initials: D
authors.lastname: Zhang
authors.forename: Yajun
authors.initials: Y
authors.lastname: Guo
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology* / Q000378:metabolism*; D018952:Antigens, CD34 / Q000235:genetics / Q000276:immunology* / Q000378:metabolism*; D016466:CHO Cells; D006224:Cricetinae; D003412:Cricetulus; D006801:Humans; D051379:Mice; D008807:Mice, Inbred BALB C; D015202:Protein Engineering
chemical_list: D000911:Antibodies, Monoclonal; D018952:Antigens, CD34