Abstract:
:Distinguishing between bull Y- and X-bearing sperm populations is advantageous for techniques using sexed bull semen. The aim of this study was to produce a single-chain fragment variable (scFv) antibody against plasma membrane epitopes on bull Y-bearing sperm. Variable heavy (VH)- and variable light (VL)-region genes generated from a hybridoma cell secreting a specific Y-bearing sperm monoclonal antibody (mAb-1F9) were cloned and expressed. The expected sizes of the DNA bands were ∼350 bp for the VH gene and ∼318 bp for the VL gene. The VH and VL genes were generated and used to construct an scFv gene (∼650 bp), which was expressed in E.coli TG1 cells and produced the corresponding soluble scFv antibody. Compared with the parent mAb-1F9, the scFv antibodies presented a high affinity for Y-bearing sperm and low cross-reactivity with X-bearing sperm. An immunofluorescence analysis confirmed that the scFv antibodies and mAb-1F9 recognize epitopes on the Y-bearing sperm surface. The fluorescence signal was strong on the plasma membrane of Y-bearing sperm but very weak for X-bearing sperm. This study aids the application and production of engineered scFv antibodies specific to Y-bearing sperm to distinguish between Y- and X-bearing sperm populations for techniques involving sexed bull semen.
journal_name
Anim Biotechnoljournal_title
Animal biotechnologyauthors
Thaworn W,Hongsibsong S,Thongkham M,Mekchay S,Pattanawong W,Sringarm Kdoi
10.1080/10495398.2020.1811294subject
Has Abstractpub_date
2020-08-31 00:00:00pages
1-11eissn
1049-5398issn
1532-2378pub_type
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