US4797475A
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Method and composition for isolating white cell elements
Assignee: University of California, San Diego
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Filing: 1985-07-17
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Granted: 1989-01-10
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Expires: 2005-07-17
Abstract
Abstract A composition of matter and method for using the composition of matter to isolate various cell elements from a heterogeneous cell suspension in a simple one step procedure. The composition is a monoclonal antibody mixture including complement and a non-toxic density gradient media. The composition provides a negative selection technique in which undesired subpopulation cells are lysed and separated from the desired cell subpopulation. The invention has particular application to isolation of white cell elements.
Inventors
- 👤 Paul I. Terasaki
- 👤 Jimmy Loon
- 👤 Steven Hardiwidjaja
- 👤 Nadim El-Awar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:00
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/5002; B; B01; B01D; B01D43/00; G01N33/53; G01N33/569; G01N33/56966; G01N33/56972; G01N33/80; Y; Y10; Y10S; Y10S436/00; Y10S436/821; Y10S436/824; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
183 words
A composition of matter adapted for use in separating a given amount of a subpopulation of cells bearing a specific immunogenic marker from a heterogeneous cell suspension, said composition of matter consisting essentially of an aqueous solution of: a sufficient amount of a monoclonal antibody which recognizes a specific immunogenic marker and is immunoreactive with a subpopulation of cells to form an antibody tagged subpopulation of cells, said subpopulation of cells being present within a heterogeneous cell suspension; complement in an amount sufficient to provide lysing of substantially all of said antibody tagged subpopulation cells to provide lysed subpopulation cells having a density less than the density of the non-lysed cells in said heterogeneous cell suspension; and a sufficient amount of a density gradient media consisting essentially of colloidal silica or cesium chloride to provide a solution after addition of said heterogeneous cell suspension having a density greater than said lysed subpopulation cells, but less than the density of the nonlysed cells in said heterogeneous cell suspension, said density gradient media being nontoxic with respect to the cells in said heterogeneous cell suspension.
Claim 2
Dependent Claim
183 words
A composition of matter adapted for use in separating a given amount of a subpopulation of cells bearing a specific immunogenic marker from a heterogeneous cell suspension, said composition of matter consisting essentially of an aqueous solution of: a sufficient amount of a monoclonal antibody which recognizes a specific immunogenic marker and is immunoreactive with a subpopulation of cells to form an antibody tagged subpopulation of cells, said subpopulation of cells being present within a heterogeneous cell suspension; complement in an amount sufficient to provide lysing of substantially all of said antibody tagged subpopulation cells to provide lysed subpopulation cells having a density less than the density of the non-lysed cells in said heterogeneous cell suspension; and a sufficient amount of a density gradient media consisting essentially of colloidal silica or cesium chloride to provide a solution after addition of said heterogeneous cell suspension having a density greater than said lysed subpopulation cells, but less than the density of the nonlysed cells in said heterogeneous cell suspension, said density gradient media being nontoxic with respect to the cells in said heterogeneous cell suspension.
Claim 3
Dependent Claim
111 words
A composition of matter according to claim 1 wherein said heterogeneous cell population includes lymphocytes, granulocytes, red blood cells and monocytes, said composition of matter adapted for use in separating red blood cells, granulocytes and monocytes from lymphocytes in said heterogeneous cell suspension wherein said composition includes monoclonal antibodies which recognize and are immunoreactive with specific immunogenic markers on said red blood cells, granulocytes and monocytes to form an antibody tagged subpopulation of red blood cells, granulocytes and monocytes which are susceptible to lysing by said complement, said composition of matter being useful in removing said red blood cells, granulocytes and monocytes from said heterogeneous cell suspension to isolate said lymphocytes.
Claim 4
Dependent Claim
57 words
A composition of matter according to claim 2 where in said heterogeneous cell population includes B lymphocytes and T lymphocytes, said specific antibody further including monoclonal antibodies which recognize B lymphocytes, said composition of matter being useful in removing said red blood cells, granulocytes, monocytes and B lymphocytes from said heterogeneous cell suspension to isolate T lymphocytes.
Claim 5
Dependent Claim
65 words
A composition of matter according to claim 3 wherein said heterogeneous cell population includes helper T lymphocytes and suppressor T lymphocytes, said specific antibody further including monoclonal antibodies which recognize helper T lymphocytes, said composition of matter being useful in removing said red blood cells, granulocytes, monocytes and B lymphocytes and helper T lymphocytes from said heterogeneous cell suspension to isolate said suppressor T lymphocytes.
Claim 6
Dependent Claim
65 words
A composition of matter according to claim 3 wherein said heterogeneous cell population includes helper T lymphocytes and suppressor T lymphocytes, said specific antibody further including monoclonal antibodies which recognize suppressor T lymphocytes, said composition of matter being useful in removing said red blood cells, granulocytes, monocytes and B lymphocytes and suppressor T lymphocytes from said heterogeneous cell suspension to isolate said helper T lymphocytes.
Claim 7
Dependent Claim
57 words
A composition of matter according to claim 2 wherein said heterogeneous cell population includes B lymphocytes and T lymphocytes, said specific antibody further including monoclonal antibodies which recognize T lymphocytes, said composition of matter being useful in removing said red blood cells, granulocytes, monocytes and T lymphocytes from said heterogeneous cell suspension to isolate said B lymphocytes.
Claim 8
Dependent Claim
66 words
A composition of matter according to claim 1 wherein said heterogeneous cell suspension includes lymphocytes, granulocytes, red blood cells and monocytes, wherein said composition includes one or more monoclonal antibodies which recognize and are immunoreactive with red blood cells, granulocytes and lymphocytes, said composition of matter being useful in removing said red blood cells, lymphocytes and granulocytes from said heterogeneous cell suspension to isolate said monocytes.
Claim 9
Dependent Claim
66 words
A composition of matter according to claim 1 wherein said heterogeneous cell suspension includes lymphocytes, granulocytes, red blood cells and monocytes, wherein said composition includes one or more monoclonal antibodies which recognize and are immunoreactive with red blood cells, lymphocytes and monocytes, said composition of matter being useful in removing said red blood cells, lymphocytes and monocytes from said heterogeneous cell suspension to isolate said granulocytes.
Claim 10
Dependent Claim
72 words
A composition of matter according to claim 1 wherein said heterogeneous cell suspension includes lymphocytes, granulocytes, red blood cells and monocytes, wherein said lymphocytes include B lymphocytes, T lymphocytes and null lymphocytes, said composition including one or more monoclonal antibodies which recognize and are immunoreactive with red blood cells, monocytes, granulocytes, T lymphocytes and B lymphocytes, said composition of matter being useful in isolating said null lymphocytes from said heterogeneous cell suspension.
Claim 11
Dependent Claim
65 words
A composition of matter according to claim 1 wherein said heterogeneous cell suspension includes lymphocytes, granulocytes, red blood cells and monocytes, wherein said granulocytes include basophils, eosinophils and neutrophils said composition including one or more monoclonal antibodies which recognize and are immunoreactive with monocytes, lymphocytes, red blood cells, neutrophils and basophils, said composition of matter being useful in isolating eosinophils from said heterogeneous cell suspension.
Claim 12
Dependent Claim
65 words
A composition of matter according to claim 1 wherein said heterogeneous cell suspension includes lymphocytes, granulocytes, red blood cells and monocytes, wherein said granulocytes include basophils, eosinophils and neutrophils, said composition including one or more monoclonal antibodies which recognize and are immunoreactive with monocytes, lymphocytes, red blood cells, basophils and easinophils, said composition of matter being useful in isolating neutrophils from said heterogeneous cell suspension.
Claim 13
Dependent Claim
65 words
A composition of matter according to claim 1 wherein said heterogeneous cell suspension includes lymphocytes, granulocytes, red blood cells and monocytes, wherein said granulocytes include basophils, eosinophils and neutrophils, said composition including one or more monoclonal antibodies which recognize and are immunoreactive with monocytes, lymphocytes, red blood cells, eosinophils and neutrophils, said composition of matter being useful in isolating basophils from said heterogeneous cell suspension.
Claim 14
Dependent Claim
22 words
A composition of matter according to claim 1 wherein said density gradient media comprises colloidal silica particles coated with a non-toxic polymer.
Claim 15
Dependent Claim
16 words
A composition of matter according to claim 13 wherein said polymer coating consists essentially of polyvinylpyrolidone.
Claim 16
Dependent Claim
14 words
A composition according to claim 13 wherein said colloidal silica particles are different sizes.
Claim 17
Dependent Claim
12 words
A composition according to claim 1 wherein said complement is rabbit complement.
Claim 18
Dependent Claim
19 words
A composition according to claim 1 wherein said solution comprises from 40 to 60 volume percent density gradient media.
Claim 19
Dependent Claim
114 words
A composition of matter according to claim 1 adapted for use in removing red blood cells and granulocytes bearing specific immunogenic markers from a heterogeneous cell population including lymphocytes, granulocytes, red blood cells and monocytes, said composition further including: a sufficient amount of a monoclonal antibody which recognizes and is immunoreactive with an immunogenic marker on said red blood cell to form an antibody tagged subpopulation of red blood cells which are susceptible to lysing by said complement; and a sufficient amount of a monoclonal antibody which recognizes and is immunoreactive with said immunogenic marker on said granulocyte to form an antibody tagged subpopulation of granulocytes which are susceptible to lysing by said complement.
References Cited (Backward Citations)
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| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
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