Use of porphyrins as a universal label
First Claim
Patent Images
1. A process for detecting particles comprising the steps of:
- a) mixing porphyrin, in the absence of a bridging agent, with said particles for a time sufficient for the porphyrin to bind to the particles;
b) separating the porphyrin labeled particles from the unbound porphyrin; and
c) detecting said porphyrin labeled particles.
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Abstract
A process is provided for using porphyrin or porphyrin derived compounds as universal labels for various assays and other quantification techniques without the need for a bridging agent to couple the label to the target particles. Particles which can be labeled include beads, microorganisms, cells, and molecules. The porphyrin label irreversibly attaches to target particles and afterwards can be detected and quantified by any number of ways, such as chemiluminometrically, fluorometrically or radiometrically in an amount which is proportional to the number of labeled particles.
89 Citations
33 Claims
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1. A process for detecting particles comprising the steps of:
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a) mixing porphyrin, in the absence of a bridging agent, with said particles for a time sufficient for the porphyrin to bind to the particles; b) separating the porphyrin labeled particles from the unbound porphyrin; and c) detecting said porphyrin labeled particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An adhesion assay comprising the steps of:
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a) providing a suspension of particles to be tested; b) mixing porphyrin, in the absence of a bridging agent, with said suspension; c) separating porphyrin labeled particles from unbound porphyrin; d) incubating the porphyrin labeled particles with a target surface; e) removing non-adherent porphyrin labeled particles; and f) detecting the adherent porphyrin labeled particles. - View Dependent Claims (19, 20)
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21. A particle diameter or surface size assay comprising the steps of:
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a) providing a suspension of a predetermined number of particles to be tested; b) mixing porphyrin, in the absence of a bridging agent, with the suspension; c) removing porphyrin labeled particles from unbound porphyrin; d) detecting a signal generated by the predetermined number of particles; and e) calculating the signal per particle as an indication of the diameter or surface size of the particles. - View Dependent Claims (22, 23)
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24. A particle uptake study comprising the steps of:
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a) providing a suspension of particles to be studied; b) mixing porphyrin, in the absence of a bridging agent, with the suspension; c) removing unbound porphyrin from porphyrin labeled particles; d) resuspending labeled particles in an appropriate medium; e) injecting the labeled particles and appropriate medium into biologic objects; and f) tracing the injected particles. - View Dependent Claims (25, 26)
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- 27. An assay kit for detecting particles, in the absence of a bridging agent, comprising a first container containing porphyrin and a set of directions for chemiluminometric, radiometric, or fluorometric processes.
- 32. A composition comprising a porphyrin bound particle, wherein there is no bridging agent to couple the porphyrin to the particle.
Specification