Method and probes for the detection of chromosome aberrations

A method of determining the presence of chromosome aberrations in a sample of eukaryotic origin using in situ hybridisation, comprising the steps of

• a) producing a preparation of the sample, whereby the sample will be subject to a fixation,
• b) contacting said preparation with a hybridisation solution comprising at least two sets of hybridisation probes, at lest one set comprising one or more peptide nucleic acid probes capable of hybridising to specific nucleic acid sequences related to a potential aberration in a chromosome, and at least one set comprising one or more peptide nucleic acid probes capable of hybridising to specific nucleic acid sequences related to another or the same potential aberration in a chromosome, and optionally a hybrid destabilising agent in an amount effective to decrease the melting temperature of hybrids formed between said nucleic acid sequences and said peptide nucleic acid probes so as to increase the ratio between specific an non-specific binding,
• c) removing any unbound and any non-specifically bound peptide nucleic acid probe, and
• d) determining the presence of peptide nucleic acid probes in the preparation.