Quantum dot biolabeling and immunomagnetic separation for detection of contaminants
First Claim
1. A method of detecting a contaminant in a starting material, comprising:
- a) immunomagnetically separating the contaminant,b) quantum dot-immunolabeling the contaminant, andc) detecting and analyzing a characteristic emission spectrum of the quantum dot.
1 Assignment
0 Petitions
Accused Products
Abstract
Methods are provided for detecting, separating, isolating and quantifying contaminants in starting materials by separating the contaminant from the starting material using a bead coupled to an affinity moiety and quantum dot-labeling the contaminant. The contaminant is detected by the characteristic emission spectrum of the quantum dot. Also, competitive binding methods are provided wherein the starting material and a control material are contacted with a quantum dot coupled to an affinity moiety capable of binding the contaminant and a competitor complex. A decrease in the intensity of the characteristic emission spectrum of the quantum dot associated with the competitor complex from the starting material as compared to that of the control material is indicative of the presence of the contaminant in the starting material.
35 Citations
55 Claims
-
1. A method of detecting a contaminant in a starting material, comprising:
-
a) immunomagnetically separating the contaminant, b) quantum dot-immunolabeling the contaminant, and c) detecting and analyzing a characteristic emission spectrum of the quantum dot. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method of detecting a contaminant in a starting material, the method comprising:
-
a) contacting the starting material with a bead coupled to a first affinity moiety capable of binding the contaminant to form a target, the target comprising the bead coupled to the contaminant; b) separating the target from the starting material; c) contacting the target with a quantum dot coupled to a second affinity moiety capable of binding the contaminant of the target of step (a) to form a labeled target, the labeled target comprising the target coupled to the quantum dot, the quantum dot having a characteristic emission spectrum; and d) detecting the characteristic emission spectrum of the quantum dot in the labeled target of step (c), wherein the presence of the characteristic emission spectrum is indicative of the detection of the contaminant. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
-
-
34. A method of quantifying contaminants in a starting material, the method comprising:
-
a) contacting the starting material with a bead coupled to a first affinity moiety capable of binding the contaminant to form a target, the target comprising the bead coupled to the contaminant; b) separating the target from the starting material; c) contacting the target with a quantum dot coupled to a second affinity moiety capable of binding to the contaminant to form a labeled target, the labeled target comprising the target coupled to the quantum dot, the quantum dot having a characteristic emission spectrum; d) detecting the intensity of the characteristic emission spectrum of the quantum dot in the labeled target of step (c); and e) determining the quantity of the contaminant in the starting material by correlating the emission spectrum intensity of step (d) with the emission spectrum intensity of a labeled target containing a known number of contaminants. - View Dependent Claims (35, 36, 37, 38)
-
-
39. A method of separating a contaminant from a starting material, the method comprising:
-
a) contacting the starting material with a composition comprising a magnetic bead coupled to a first affinity moiety capable of binding the contaminant to form a target, the target comprising the magnetic bead coupled to the contaminant; b) contacting the target with a quantum dot coupled to a second affinity moiety capable of binding the contaminant of the target of step (a) to form a labeled target, the labeled target comprising the target coupled to the quantum dot, the quantum dot having a characteristic emission spectrum; c) separating the labeled target from the starting material; and d) detecting the characteristic emission spectrum of the quantum dot in the labeled target of step (c), wherein the presence of the characteristic emission spectrum is indicative of the detection of the contaminant.
-
-
40. A kit for detecting a contaminant in a starting material, the kit comprising:
-
a) a bead capable of being coupled to a first affinity moiety; b) the first affinity moiety capable of binding the contaminant; c) a quantum dot capable of being coupled to a second affinity moiety, the quantum dot having a characteristic emission spectrum; and d) the second affinity moiety capable of binding to the contaminant. - View Dependent Claims (41, 42, 43, 44, 45, 46)
-
-
47. A method of detecting a contaminant in a starting material, the method comprising:
-
a) contacting the starting material containing a contaminant and a control material not containing the contaminant each with
1) a quantum dot coupled to an affinity moiety, the affinity moiety capable of binding the contaminant and
2) a competitor complex comprising a bead coupled to the contaminant;b) separating the competitor complex from each of the starting material and the control material; and c) detecting the characteristic emission spectrum of the quantum dot associated with the competitor complex from each of the starting material and the control material, wherein a decrease in the intensity of the characteristic emission spectrum of the competitor complex from the starting material as compared to the intensity of the characteristic emission spectrum of the competitor complex from the control material is indicative of the presence of the contaminant in the starting material. - View Dependent Claims (48, 49, 50, 51, 52, 53)
-
-
54. A method for quantifying a contaminant in a starting material, the method comprising:
-
a) contacting the starting material containing the contaminant, a control material not containing the contaminant and at least one control material containing a known amount of the contaminant each with
1) a quantum dot coupled to an affinity moiety capable of binding the contaminant and
2) a competitor complex comprising a bead coupled to the contaminant;b) separating the competitor complex from each of the starting material, the control material not containing the contaminant and at least one control material containing a known amount of the contaminant; c) detecting the characteristic emission spectrum of the quantum dot associated with the competitor complex from each of the starting material, the control material not containing the contaminant and at least one control material containing a known amount of the contaminant; and d) comparing the intensity of the characteristic emission spectrum of the quantum dot-competitor complex from the starting material to the intensity of the characteristic emission spectrum of the quantum dot-competitor complex from the control material containing a known amount of the contaminant, wherein the intensity of the characteristic emission spectrum is indicative of the quantity of the contaminant in the starting material. - View Dependent Claims (55)
-
Specification