Methods for detection by in situ hybridization of multiple chromosomes or regions thereof
First Claim
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1. A method for the detection by in situ hybridization of a plurality of target chromosomes or a plurality of target regions of chromosomes comprising:
- (a) contacting under hybridizing conditions a plurality of target chromosomes or a plurality of target regions of chromosomes, which are contained within a cytological or histological preparation or specimen, with a multiple probe composition comprising a plurality of direct label DNA probe compositions, wherein;
(i) each of the direct label DNA probe compositions is detectable by use of a different fluorescent label, each label being detectable in the presence of the other fluorescent label or labels, and(ii) each of the direct label DNA probe compositions comprises direct label DNA segments which;
(1) are complementary to different target chromosomes or target regions of a chromosome to be detected,(2) have multiple fluorescent labels covalently attached thereto, and(3) have 0.3 to 6 mole percent of total nucleotides in each direct label DNA segment fluorescently labeled, and(b) detecting the presence or absence of hybridization of each of the direct label DNA probe compositions to the chromosomes or regions of a chromosome by fluorescent techniques.
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Abstract
Direct label probe compositions which stain DNA of a preselected single chromosome or region of a chromosome of a multi-chromosomal genome are provided that comprise mixed DNA segments which are covalently bound to fluorophore groups through linking groups. The mixed DNA segments are derived from the DNA present in the preselected chromosome or chromosome region. These probe compositions can be used concurrently or sequentially with other probe compositions.
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10 Claims
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1. A method for the detection by in situ hybridization of a plurality of target chromosomes or a plurality of target regions of chromosomes comprising:
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(a) contacting under hybridizing conditions a plurality of target chromosomes or a plurality of target regions of chromosomes, which are contained within a cytological or histological preparation or specimen, with a multiple probe composition comprising a plurality of direct label DNA probe compositions, wherein; (i) each of the direct label DNA probe compositions is detectable by use of a different fluorescent label, each label being detectable in the presence of the other fluorescent label or labels, and (ii) each of the direct label DNA probe compositions comprises direct label DNA segments which; (1) are complementary to different target chromosomes or target regions of a chromosome to be detected, (2) have multiple fluorescent labels covalently attached thereto, and (3) have 0.3 to 6 mole percent of total nucleotides in each direct label DNA segment fluorescently labeled, and (b) detecting the presence or absence of hybridization of each of the direct label DNA probe compositions to the chromosomes or regions of a chromosome by fluorescent techniques. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification