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Sagot :
Molecular cloning strategies and V gene phage show have revolutionized the production of human monoclonal antibodies.
Antibodies of a defined specificity can be received by using selecting phage show libraries on antigens in a system known as panning. we've got applied these techniques to the isolation of 3 HLA-A2-specific single-chain variable domain fragments (scFv) from a patient alloimmunised by using blood transfusion. evaluation of specificity with cells of HLA genotyped donors revealed the following:
i) similarly to the primary reactivity with HLA-A2, pass-reactivity with the HLA-A28 epitope.
ii) Inhibition of scFv binding to the antigen by means of the patient's antibodies. The heavy chain variable genes of all three have been derived from the germline gene Cos-3, deliver the hallmarks of somatic hypermutation, and are most probably derived from clonally associated B cells. The light chain variable domain names have been encoded by DPK1 and DPK8 from the VkappaI own family. these facts show that phage show can be used to clone HLA-precise alloantibodies that understand the local antigen from alloimmunised patients.
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