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EP0044722A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Human hybridomas, precursors and products

Assignee: Leland Stanford Junior University
•
Filing: 1981-07-16
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Granted: —
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Expires: 2001-07-16
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Abstract

Abstract Human monoclonal antibody compositions, human-human monoclonal hybridoma cells, human non-viral transformed particularly non-Epstein-Barr virus transformed, neoplastic lymphoid cells, human antibody genes and their uses. Human neoplastic cells are developed for fusing with immunized lymphoid cells to provide stable human-human hybridoma strains producing complete monoclonal antibodies for a predefined antigen. From a myeloma cell line, rapidly growing 8-azaguanine resistant HAT sensitive cells are selected. The selected myeloma cells are crossed with immunized lymphoid cells and the resulting cell mixture grown under controlled selective conditions. Lymphoma cells may be substituted for the myeloma cells. After expansion of the desired hybridoma cells, the monoclonal antibodies may be harvested. The hybridomas serve as a source for messenger RNA for light and heavy chains which may be used for production of light and heavy chain immunoglobulin proteins through hybrid DNA techniques. U-266-AR, cell line has been deposited at Cell Distribution Center, The Salk Institute on July 17, 1980, and the A.T.C.C. on September 11, 1980.

Inventors

  • 👤 Henry S. Kaplan
  • 👤 Lennart Olsson

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 20:40
CPC Classifications
C; C07; C07K; C07K16/00; C12; C12N; C12N5/00; C12N5/10; C12N5/12; C12N5/16; C12N5/163

Claims Analysis

Total Claims: 18
Claim 1
Independent Claim 121 words
A method for producing human-human hybridomas producing specific human monoclonal antibodies against a predefined determinant site which comprises: fusing lymphoid cells immunized against a predefined determinant site with rapidly growing HAT 'sensitive non-Epstein-Barr virus transformed neoplastic lymphoid cell in a fusing medium at an approximately equivalent cell ratio to produce a cell mixture; dividing into each of a plurality of wells a sufficient number of cells of said cell mixture to encourage growth and incubating said cells in a nutrient medium for a sufficient time to expand the number of viable cells in each well; growing the cells in HAT medium to produce clones free of HAT sensitive cells; and selecting for clones producing monoclonal antibodies for said predefined determinant site.
Claim 2
Independent Claim 121 words
A method for producing human-human hybridomas producing specific human monoclonal antibodies against a predefined determinant site which comprises: fusing lymphoid cells immunized against a predefined determinant site with rapidly growing HAT 'sensitive non-Epstein-Barr virus transformed neoplastic lymphoid cell in a fusing medium at an approximately equivalent cell ratio to produce a cell mixture; dividing into each of a plurality of wells a sufficient number of cells of said cell mixture to encourage growth and incubating said cells in a nutrient medium for a sufficient time to expand the number of viable cells in each well; growing the cells in HAT medium to produce clones free of HAT sensitive cells; and selecting for clones producing monoclonal antibodies for said predefined determinant site.
Claim 3
Dependent Claim 26 words
A method according to Claim 1, wherein said neoplastic lymphoid cells are HAT sensitive myeloma cells which are grown in the presence of 8-azaguanine before fusing.
Claim 4
Dependent Claim 26 words
A method according to Claim 1, wherein said neoplastic lymphoid cells are HAT sensitive lymphoma cells, which are grown in the presence of 8-azaguanine before fusing.
Claim 5
Dependent Claim 8 words
Human monoclonal antibodies derived from a human-human hybridoma.
Claim 6
Dependent Claim 8 words
Human monoclonal antibodies derived from a human-human hybridoma.
Claim 7
Dependent Claim 20 words
Antibodies according to Claim 4, wherein said human-human hybridoma is derived from non-Epstein-Barr virus transformed neoplastic lymphoid cell fusion partners.
Claim 8
Dependent Claim 15 words
Antibodies according to Claim 5, wherein said human-human hybridoma is derived from a myeloma cell.
Claim 9
Dependent Claim 17 words
. Human monoclonal antibodies according to any of Claims 4 to 6, wherein said antibodies are IgM.
Claim 10
Dependent Claim 16 words
Human monoclonal antibodies according to any of Claims 4 to 6, wherein said antibodies are IgA.
Claim 11
Dependent Claim 11 words
Myeloma cells of the U-266-AR l strain or cells derived therefrom.
Claim 12
Dependent Claim 11 words
Myeloma cells of the U-266-AR l strain or cells derived therefrom.
Claim 13
Dependent Claim 3 words
Human hybridoma cells
Claim 14
Dependent Claim 3 words
Human hybridoma cells
Claim 15
Independent Claim 46 words
A method for treating a human host subject to an undesirable physiological response from contact with a surface antigen of a pathogenic cell, which comprises: administering to said human host human monoclonal antibodies specific for said antigen in an amount sufficient to diminish said undesirable response.
Claim 16
Independent Claim 46 words
A method for treating a human host subject to an undesirable physiological response from contact with a surface antigen of a pathogenic cell, which comprises: administering to said human host human monoclonal antibodies specific for said antigen in an amount sufficient to diminish said undesirable response.
Claim 17
Dependent Claim 37 words
A composition of matter consisting essentially of human IgG molecules characterized by being: a) substantially free of incomplete IgG molecules; b) homogeneous in chemical composition; and c) specifically binding to a predefined determinant site on an antigen.
Claim 18
Dependent Claim 37 words
A composition of matter consisting essentially of human IgG molecules characterized by being: a) substantially free of incomplete IgG molecules; b) homogeneous in chemical composition; and c) specifically binding to a predefined determinant site on an antigen.

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