Identification of human antibody fragment clones specific for tetanus toxoid in a bacteriophage lambda immunoexpression library.

Abstract:

:We have applied a molecular biology approach to the identification of human monoclonal antibodies. Human peripheral blood lymphocyte mRNA was converted to cDNA and a select subset was amplified by the polymerase chain reaction. These products, containing coding sequences for numerous immunoglobulin heavy- and kappa light-chain variable and constant region domains, were inserted into modified bacteriophage lambda expression vectors and introduced into Escherichia coli by infection to yield a combinatorial immunoexpression library. Clones with binding activity to tetanus toxoid were identified by filter hybridization with radiolabeled antigen and appeared at a frequency of 0.2% in the library. These human antigen binding fragments, consisting of a heavy-chain fragment covalently linked to a light chain, displayed high affinity of binding to tetanus toxoid with equilibrium constants in the nanomolar range but did not cross-react with other proteins tested. We estimate that this human immunoexpression library contains 20,000 clones with high affinity and specificity to our chosen antigen.

authors

Mullinax RL,Gross EA,Amberg JR,Hay BN,Hogrefe HH,Kubitz MM,Greener A,Alting-Mees M,Ardourel D,Short JM

doi

10.1073/pnas.87.20.8095

subject

Has Abstract,Author List Incomplete

pub_date

1990-10-01 00:00:00

pages

8095-9

issue

20

eissn

0027-8424

issn

1091-6490

journal_volume

87

pub_type

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