US4696905A
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Method for diagnosing cancer using ESR
Assignee: Jeol Ltd
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Filing: 1984-05-10
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Granted: 1987-09-29
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Expires: 2004-05-10
Abstract
Abstract A method for diagnosis of cancer utilizing an ESR spectrometer comprised a first step for mixing cells from a patient with a solution of hematoporphyrin or hematoporphyrin derivative, a second step for isolating said cells from unreacted reagent and obtaining ESR spectral signal on said cells, a third step for finding quantity S x of the radicals contained in said cells on the basis of the ESR signal, and a fourth step for comparing value S x at a predetermined level.
Inventors
- 👤 Masaaki Aoyama
- 👤 Mitsuharu Itabashi
- 👤 Mariko Miura
- 👤 Masahiro Kohno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:54
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/60; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/145555; Y10T436/146666; Y10T436/24
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
121 words
A method for diagnosis of cancer in vitro utilizing an ESR spectrometer for quantitative measurements of radicals found in lymphocytes taken from a patient, comprising the steps of: (a) mixing cells from a patient with a reagent solution, selected from the group consisting of hematoporphyrin and hematoporphyrin derivatives; (b) isolating the resulting reaction product from unreacted reagent; (c) irradiating said reaction product with light to generate porphyrin radicals. (d) obtaining an ESR spectral signal, S x , of said reaction product indicative of the quantity of radicals contained therein; and (e) diagnosing the presence or absence of cancer on the basis of value S x by comparing S x to S values preestablished to be indicative of cancerous and/or noncancerous states.
Claim 2
Independent Claim
121 words
A method for diagnosis of cancer in vitro utilizing an ESR spectrometer for quantitative measurements of radicals found in lymphocytes taken from a patient, comprising the steps of: (a) mixing cells from a patient with a reagent solution, selected from the group consisting of hematoporphyrin and hematoporphyrin derivatives; (b) isolating the resulting reaction product from unreacted reagent; (c) irradiating said reaction product with light to generate porphyrin radicals. (d) obtaining an ESR spectral signal, S x , of said reaction product indicative of the quantity of radicals contained therein; and (e) diagnosing the presence or absence of cancer on the basis of value S x by comparing S x to S values preestablished to be indicative of cancerous and/or noncancerous states.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein the ESR spectral signal is obtained at a temperature about 173° K.
Claim 4
Independent Claim
23 words
The method of claims 1 or 2 wherein the ESR spectral signal is obtained by irradiating the reaction product with a light beam.
Claim 5
Independent Claim
141 words
A method for diagnosis of cancer in vitro utilizing an ESR spectrometer for quantitative measurement of radicals found in lymphocytes taken from a patient, comprising the steps of: (a) isolating lymphocytes from blood extracted from a patient; (b) mixing said lymphocytes with a solution selected from the group consisting of hematoporphyrin and hematoporphyrin derivatives; (c) isolating the resulting reaction product from the mixture; (d) irradiating said reaction product with light to generate porphyrin radicals, (e) obtaining ESR spectral signal of said reaction product; (f) determining a value S x indicative of the quantity of the radicals contained in said reaction product on the basis of the ESR signal; and (g) diagnosing for the presence or absence of cancer on the basis of value S x by comparing S x to S values preestablished to be indicative of cancerous and/or noncancerous states.
Claim 6
Independent Claim
141 words
A method for diagnosis of cancer in vitro utilizing an ESR spectrometer for quantitative measurement of radicals found in lymphocytes taken from a patient, comprising the steps of: (a) isolating lymphocytes from blood extracted from a patient; (b) mixing said lymphocytes with a solution selected from the group consisting of hematoporphyrin and hematoporphyrin derivatives; (c) isolating the resulting reaction product from the mixture; (d) irradiating said reaction product with light to generate porphyrin radicals, (e) obtaining ESR spectral signal of said reaction product; (f) determining a value S x indicative of the quantity of the radicals contained in said reaction product on the basis of the ESR signal; and (g) diagnosing for the presence or absence of cancer on the basis of value S x by comparing S x to S values preestablished to be indicative of cancerous and/or noncancerous states.
Claim 7
Dependent Claim
18 words
The method of claim 4 wherein the ESR spectral signal is obtained at a temperature about 173° K.
Claim 8
Independent Claim
23 words
The method of claims 4 or 5 wherein the ESR spectral signal is obtained by irradiating said reaction product with a light beam.
Claim 9
Independent Claim
149 words
A method for diagnosis of cancer in vitro utilizing an ESR spectrometer for quantitative measurement of radicals found in lymphocytes taken from a patient, comprising the steps of: (a) mixing cells from a patient with a reagent solution, selected from the group consisting of hematoporphyrin; and hematoporphyrin, derivatives; (b) isolating the resulting reaction product from unreacted reagent; (c) irradiating said reaction product with light to generate porphyrin radicals, (d) obtaining ESR spectral signal of said reaction product; (e) determining the value, S x , indicative of the quantity of radicals contained in said reaction product and determining a g-value, g x , of said radicals on the basis of the ESR signal; and (f) diagnosing the presence or absence of cancer on the basis of the values S x and g x by comparing to S values and a value preestablished to be indicative of cancerous and/or noncancerous states.
Claim 10
Independent Claim
149 words
A method for diagnosis of cancer in vitro utilizing an ESR spectrometer for quantitative measurement of radicals found in lymphocytes taken from a patient, comprising the steps of: (a) mixing cells from a patient with a reagent solution, selected from the group consisting of hematoporphyrin; and hematoporphyrin, derivatives; (b) isolating the resulting reaction product from unreacted reagent; (c) irradiating said reaction product with light to generate porphyrin radicals, (d) obtaining ESR spectral signal of said reaction product; (e) determining the value, S x , indicative of the quantity of radicals contained in said reaction product and determining a g-value, g x , of said radicals on the basis of the ESR signal; and (f) diagnosing the presence or absence of cancer on the basis of the values S x and g x by comparing to S values and a value preestablished to be indicative of cancerous and/or noncancerous states.
Claim 11
Dependent Claim
18 words
The method of claim 7 wherein the ESR spectral signal is obtained at a temperature about 173° K.
Claim 12
Dependent Claim
45 words
The method of claim 7 or 8 wherein said step of diagnosing consists of determining the location of a point defined by S x and g x on a plot of Sg coordinates having empirically established areas which are representative of cancerous and noncancerous states.
Claim 13
Dependent Claim
59 words
The method of claim 7 wherein said step of diagnosing consists of determining a value K of a mathematical function, K, using S x and g x and determining the location of a point defined by S x and K x on a plot of S-K coordinates having empirically established areas which are representative of cancerous and noncancerous states.
Claim 14
Dependent Claim
11 words
The method of claim 10 wherein said mathematical function comprises multiplication.
Claim 15
Dependent Claim
14 words
The method of claim 10 wherein said mathematical function comprises an exponential function, K.
Claim 16
Dependent Claim
46 words
The method of claim 7 wherein said step of diagnosing comprises finding a value K x of a mathematical function, K, using S x and g x and comparing the value K x to values of K prestablished to be representative of cancerous and/or noncancerous states.
Claim 17
Dependent Claim
12 words
The method of claim 13 wherein said mathematical function, K, comprises multiplication.
Claim 18
Dependent Claim
14 words
The method of claim 13 wherein said mathematical function comprises an exponential function, K.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
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