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FISH and chips: a review of microfluidic platforms for FISH analysis

Rodriguez-Mateos, Pablo; Azevedo, Nuno Filipe; Almeida, Carina; Pamme, Nicole

Authors

Pablo Rodriguez-Mateos

Nuno Filipe Azevedo

Carina Almeida



Abstract

Fluorescence in situ hybridization (FISH) allows visualization of specific nucleic acid sequences within an intact cell or a tissue section. It is based on molecular recognition between a fluorescently labeled probe that penetrates the cell membrane of a fixed but intact sample and hybridizes to a nucleic acid sequence of interest within the cell, rendering a measurable signal. FISH has been applied to, for example, gene mapping, diagnosis of chromosomal aberrations and identification of pathogens in complex samples as well as detailed studies of cellular structure and function. However, FISH protocols are complex, they comprise of many fixation, incubation and washing steps involving a range of solvents and temperatures and are, thus, generally time consuming and labor intensive. The complexity of the process, the relatively high-priced fluorescent probes and the fairly high-end microscopy needed for readout render the whole process costly and have limited wider uptake of this powerful technique. In recent years, there have been attempts to transfer FISH assay protocols onto microfluidic lab-on-a-chip platforms, which reduces the required amount of sample and reagents, shortens incubation times and, thus, time to complete the protocol, and finally has the potential for automating the process. Here, we review the wide variety of approaches for lab-on-chip-based FISH that have been demonstrated at proof-of-concept stage, ranging from FISH analysis of immobilized cell layers, and cells trapped in arrays, to FISH on tissue slices. Some researchers have aimed to develop simple devices that interface with existing equipment and workflows, whilst others have aimed to integrate the entire FISH protocol into a fully autonomous FISH on-chip system. Whilst the technical possibilities for FISH on-chip are clearly demonstrated, only a small number of approaches have so far been converted into off-the-shelf products for wider use beyond the research laboratory.

Journal Article Type Review
Journal Medical Microbiology and Immunology
Print ISSN 0300-8584
Electronic ISSN 1432-1831
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
APA6 Citation Rodriguez-Mateos, P., Azevedo, N. F., Almeida, C., & Pamme, N. (in press). FISH and chips: a review of microfluidic platforms for FISH analysis. Medical Microbiology and Immunology, https://doi.org/10.1007/s00430-019-00654-1
DOI https://doi.org/10.1007/s00430-019-00654-1
Keywords Immunology; Immunology and Allergy; Microbiology (medical); General Medicine; Microfluidics-assisted FISH; µFISH; Microfluidics; Lab-on-a-Chip (LOC); Fluorescence in situ hybridization (FISH)
Publisher URL https://link.springer.com/article/10.1007/s00430-019-00654-1?wt_mc=Internal.Event.1.SEM.ArticleAuthorOnlineFirst&utm_source=ArticleAuthorOnlineFirst&utm_medium=email&utm_content=AA_en_06082018&ArticleAuthorOnlineFirst_20200122
Additional Information Received: 29 August 2019; Accepted: 19 December 2019; First Online: 21 January 2020

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