The role of cytokines in immunological tolerance: potential for therapy

Author:

McNeil Nicole,Ried Thomas

Abstract

Molecular cytogenetic techniques that are based on fluorescence in situ hybridisation (FISH) have become invaluable tools for the diagnosis and identification of the numerous chromosomal aberrations that are associated with neoplastic disease, including both haematological malignancies and solid tumours. FISH can be used to identify chromosomal rearrangements, by detecting specific DNA sequences with fluorescently labelled DNA probes. The technique of comparative genomic hybridisation (CGH) involves two-colour FISH. It can be used to establish ratios of fluorescence intensity values between tumour DNA and control DNA along normal reference metaphase chromosomes, and thereby to detect DNA copy-number changes such as gains and losses of specific chromosomal regions and gene amplifications. Spectral karyotyping (SKY) is a novel molecular cytogenetic method for characterising numerical and structural chromosomal aberrations. SKY involves the simultaneous hybridisation of 24 differentially labelled chromosome-painting probes, followed by spectral imaging and chromosome classification, and produces a colour karyotype of the entire genome. The use of SKY has contributed significantly to the identification of chromosomal anomalies that are associated with constitutional and cancer cytogenetics, and has revealed many aberrations that go undetected by traditional banding techniques. In this article, we have reviewed these new molecular cytogenetic techniques and described their various applications in molecular medicine.

Publisher

Cambridge University Press (CUP)

Subject

Molecular Biology,Molecular Medicine

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