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1. US20070026384 - Detection of transmembrane potentials by optical methods

Office United States of America
Application Number 11529838
Application Date 29.09.2006
Publication Number 20070026384
Publication Date 01.02.2007
Grant Number 7687282
Grant Date 30.03.2010
Publication Kind B2
IPC
G01N 21/77
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
75Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
77by observing the effect on a chemical indicator
G01N 21/78
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
75Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
77by observing the effect on a chemical indicator
78producing a change of colour
G01N 33/533
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/-G01N31/131
48Biological material, e.g. blood, urine; Haemocytometers
50Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
53Immunoassay; Biospecific binding assay; Materials therefor
531Production of immunochemical test materials
532Production of labelled immunochemicals
533with fluorescent label
C07D 209/00
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
209Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
C07D 209/08
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
209Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
02condensed with one carbocyclic ring
04Indoles; Hydrogenated indoles
08with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to carbon atoms of the hetero ring
C07D 213/00
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
213Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
CPC
C07D 209/08
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
209Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
02condensed with one carbocyclic ring
04Indoles; Hydrogenated indoles
08with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to carbon atoms of the hetero ring
C07D 239/60
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
239Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
02not condensed with other rings
24having three or more double bonds between ring members or between ring members and non-ring members
28with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
46Two or more oxygen, sulfur or nitrogen atoms
60Three or more oxygen or sulfur atoms
C07D 239/62
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
239Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
02not condensed with other rings
24having three or more double bonds between ring members or between ring members and non-ring members
28with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
46Two or more oxygen, sulfur or nitrogen atoms
60Three or more oxygen or sulfur atoms
62Barbituric acids
C07D 239/66
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
239Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
02not condensed with other rings
24having three or more double bonds between ring members or between ring members and non-ring members
28with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
46Two or more oxygen, sulfur or nitrogen atoms
60Three or more oxygen or sulfur atoms
66Thiobarbituric acids
C07D 311/16
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
311Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
02ortho- or peri-condensed with carbocyclic rings or ring systems
04Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
06with oxygen or sulfur atoms directly attached in position 2
08not hydrogenated in the hetero ring
16substituted in position 7
C07F 5/003
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
5Compounds containing elements of Groups 3 or 13 of the Periodic System
003without C-Metal linkages
Applicants The Regents of the University of California
Inventors Tsien Roger Y.
Gonzalez, III Jesus E.
Agents Townsend and Townsend and Crew LLP
Title
(EN) Detection of transmembrane potentials by optical methods
Abstract
(EN)

Methods and compositions are provided for determining the potential of a membrane. In one aspect, the method comprises:

    • (a) introducing a first reagent comprising a hydrophobic fluorescent ion capable of redistributing from a first face of the membrane to a second face of the membrane in response to changes in the potential of the membrane, as described by the Nernst equation,
    • (b) introducing a second reagent which labels the first face or the second face of the membrane, which second reagent comprises a chromophore capable of undergoing energy transfer by either (i) donating excited state energy to the fluorescent ion, or (ii) accepting excited state energy from the fluorescent ion,
    • (c) exposing the membrane to radiation;
    • (d) measuring energy transfer between the fluorescent ion and the second reagent, and
    • (e) relating the energy transfer to the membrane potential.

Energy transfer is typically measured by fluorescence resonance energy transfer. In some embodiments the first and second reagents are bound together by a suitable linker.

In one aspect the method is used to identify compounds which modulate membrane potentials in biological membranes.

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