Tissue analysis and kits therefor
This invention relates to methods of analyzing a tissue sample from a subject. In particular, the invention combines morphological staining and/or immunohistochemistry (IHC) with fluorescence in situ hybridization (FISH) within the same section of a tissue sample. The analysis can be automated or manual. The invention also relates to kits for use in the above methods.
1. A method for detecting the presence of a cellular target protein and a cellular target nucleic acid associated with an identified cell type in a tissue sample, comprising the steps of: (a) applying a morphological stain to said tissue sample effective to provide a stained tissue sample; (b) identifying a cell type in said stained tissue sample; (c) contacting a section of the tissue sample with an antibody which specifically binds to the target protein associated with the identified cell type in the tissue sample; (d) determining binding of the antibody to the section of tissue sample; (e) hybridizing a labeled nucleic acid probe to the target nucleic acid in the same section of tissue sample; (f) detecting the presence of the labeled nucleic acid probe in the identified cell type in the section of tissue sample; and (g) comparing the results of step (d) with the results of step (f), whereby the presence of the cellular target protein and the cellular target nucleic acid associated with the identified cell type in the tissue sample is detected.
2. The method of claim 1 wherein the label is a fluorescent dye.
3. The method of claim 1 , wherein the nucleic acid probe is constructed to hybridize to the target nucleic acid sequence indicating a genetic abnormality selected from the group consisting of amplification, addition, substitution, translocation and deletion.
4. The method of claim 1 , wherein the target nucleic acid is a HER2/neu gene.
5. The method of claim 1 , wherein the target protein is a HER2 protein.
6. The method of claim 1 , wherein the tissue sample is selected from the group consisting of breast, prostate, ovary, colon, lung, endometrium, stomach, salivary gland and pancreas tissue samples.
7. The method of claim 1 , wherein the section of tissue sample is obtained from a fixed, paraffin-embedded tissue sample.