Monoclonal Antibodies Which Preferentially Bind To 22 K Human ...

Endocrinologia Japonica Online ISSN : 2185-6370 Print ISSN : 0013-7219 ISSN-L : 0013-7219

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Monoclonal Antibodies which Preferentially Bind to 22 K Human Growth Hormone Rather than Its 20 K Variant TOHRU NAKANISHI, HIROSHI MATSUI, HIROSHI NOGUCHI Author information

• TOHRU NAKANISHI

  Laboratory of Biotechnology, Takarazuka Research Center, Sumitomo Chemical Co. Ltd.

• HIROSHI MATSUI

  Laboratory of Biotechnology, Takarazuka Research Center, Sumitomo Chemical Co. Ltd.

• HIROSHI NOGUCHI

  Laboratory of Biotechnology, Takarazuka Research Center, Sumitomo Chemical Co. Ltd.

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JOURNAL FREE ACCESS

1989 Volume 36 Issue 4 Pages 481-490

DOI https://doi.org/10.1507/endocrj1954.36.481 Details

• Published: 1989 Received: January 09, 1989 Available on J-STAGE: January 25, 2011 Accepted: - Advance online publication: - Revised: -

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Abstract We have established 13 hybridoma cell lines which secrete mouse IgGi monoclonal antibodies (McAbs) to human growth hormone (hGH). Binding affinity and binding specificity of McAbs were analyzed by competitive radioimmunoassay. Among these McAbs, CL. Bl showed a high affinity of 9.8×108l/mol, and all McAbs so far tested showed very weak cross-reactivity or none at all with human prolactin (hPRL) and human chorionic somatomammotropin (hCS; human placental lactogen). Analysis of binding sites of McAbs using hGH variant and fragments in both ELISA and RIA demonstrated that McAbs could be classified into two groups. All the McAbs obtained in this study bound to plasmin-digested fragment S2 (hGH 1-134 and 141-191) and fragment α3 (hGH 1-134 and 147-191). However, five (such as 1D2) out of 13 McAbs bound to fragment F 1 (hGH 1-134) and others (such as CL. B1) did not. The McAb CL. B1 in the latter group showed low affinity with 20 K hGH (residue 32-46 deleted in native 22 K hGH) in contrast to high affinity with hGH (22K). This suggests that the former McAbs recognize an epitope located at the N-terminal two-third part of hGH. In contrast, the McAbs of the latter group are likely to recognize three-dimensional structure of native 22K hGH. References (17) Related articles (0) Figures (0) Content from these authors Supplementary material (0) Result List () Cited by (0) © The Japan Endocrine Society Previous article Next article Favorites & Alerts

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