Abstract: Nucleic acid probes are immobilized on polystyrene surfaces such as the wells of microtiter plates for use in solution phase nucleic acid sandwich hybridization assays, particularly those using large branched DNA amplification multimers, by: (a) cleansing the surface by washing it sequentially with a strong acid, a strong base, and water, (b) passively adsorbing a polypeptide having primary amino groups onto the cleansed surface, and (c) covalently bonding the probe to the adsorbed polypeptide via a base-stable bifunctional crosslinking agent, and (d) subjecting the surface to conditions that simulate the hybridization conditions used in the assay.
Type:
Grant
Filed:
December 23, 1991
Date of Patent:
May 5, 1998
Assignee:
Chiron Corporation
Inventors:
Patrick Sheridan, Chu-An Chang, Joyce Running, Michael S. Urdea
Abstract: Novel DNA probe sequences for detection of HBV in a sample in a solution phase sandwich hybridization assay are described. Amplified nucleic acid hybridization assays using the probes are exemplified.
Type:
Grant
Filed:
January 24, 1994
Date of Patent:
April 7, 1998
Assignee:
Chiron Corporation
Inventors:
Bruce D. Irvine, Janice A. Kolberg, Joyce A. Running, Michael S. Urdea
Abstract: Nucleic acid probes are immobilized on polystyrene surfaces such as the wells of microtiter plates for use in solution phase nucleic acid sandwich hybridization assays, particularly those using large branched DNA amplification multimers, by: (a) cleansing the surface by washing it sequentially with a strong acid, a strong base, and water, (b) passively adsorbing a polypeptide having primary amino groups onto the cleansed surface, and (c) covalently bonding the probe to the adsorbed polypeptide via a base-stable bifunctional crosslinking agent, and (d) subjecting the surface to conditions that simulate the hybridization conditions used in the assay.
Type:
Grant
Filed:
May 10, 1995
Date of Patent:
January 27, 1998
Assignee:
Chiron Corporation
Inventors:
Patrick Sheridan, Chu-An Chang, Joyce Running, Michael S. Urdea
Abstract: Large comb-type branched polynucleotides useful as amplifier molecules in nucleic acid hybridization assays are provided, the polynucleotides comprising: a polynucleotide backbone having at least about 15 multifunctional nucleotides, each of which defines a sidechain site and a first single-stranded oligonucleotide unit that is capable of binding specifically to a first single-stranded polynucleotide sequence of interest; and pendant polynucleotide sidechains extending from said multifunctional nucleotides each comprising iterations of a second single-stranded oligonucleotide unit that is capable of binding specifically to a second single-stranded polynucleotide sequence of interest, the total number of iterations in all sidechains being at least 20. Methods of making these polynucleotides are also provided.
Type:
Grant
Filed:
June 7, 1995
Date of Patent:
January 20, 1998
Assignee:
Chiron Corporation
Inventors:
Michael S. Urdea, Thomas Horn, Chu-An Chang, Brian Warner, Timothy J. Fultz
Abstract: Novel DNA probe sequences for detection of HAV in a sample in a solution phase sandwich hybridization assay are described. Amplified nucleic acid hybridization assays using the probes are exemplified.
Abstract: In one aspect of this invention, various protein/nucleic acid hybrid probes are described which can be used to amplify the detectable signal in immunoassays. The protein moiety is capable of functioning either as an antibody or an antigen. The nucleic acid moiety serves as a signal amplifier. In another aspect, various methods of amplifying the detectable signal in immunoassays by use of the hybrid probes and related polynucleotide probes are disclosed.
Abstract: Linear or branched oligonucleotide multimers useful as amplifiers in biochemical assays which comprise (1) at least one first single-stranded oligonucleotide unit that is complementary to a single-stranded oligonucleotide sequence of interest, and (2) a multiplicity of second single-stranded oligonucleotide units that are complementary to a single-stranded labeled oligonucleotide. Amplified sandwich nucleic acid hybridizations and immunoassays using the multimers are exemplified.
Type:
Grant
Filed:
June 7, 1995
Date of Patent:
April 29, 1997
Assignee:
Chiron Corporation
Inventors:
Michael S. Urdea, Brian Warner, Thomas Horn
Abstract: Novel DNA probe sequences for detection of Chlamydiae in a sample in a solution phase sandwich hybridization assay are described. Amplified nucleic acid hybridization assays using the probes are exemplified.
Type:
Grant
Filed:
June 7, 1995
Date of Patent:
April 8, 1997
Assignee:
Chiron Corporation
Inventors:
Ray Sanchez-Pescador, Diana J. Besemer, Michael S. Urdea
Abstract: Novel DNA probe sequences for detection of CMV in a sample in a solution phase sandwich hybridization assay are described. Amplified nucleic acid hybridization assays using the probes are exemplified.
Type:
Grant
Filed:
October 15, 1993
Date of Patent:
April 18, 1995
Assignee:
Chiron Corporation
Inventors:
Janice A. Kolberg, Lu-Ping Shen, Michael S. Urdea