Go with the flow: advances and trends in magnetic flow cytometry

Abstract

The growing need for biological information at the single cell level has driven the development of improved cytometry technologies. Flow cytometry is a particularly powerful method that has evolved over the past few decades. Flow cytometers have become essential instruments in biomedical research and routine clinical tests for disease diagnosis, prognosis, and treatment monitoring. However, the increasing number of cellular parameters unveiled by genomic, proteomic, and metabolomic data platforms demands an augmented multiplexability. Also, the need for identification and quantification of relevant biomarkers at low levels requires outstanding analytical sensitivity and reliability. In addition, growing awareness of the advantages associated with miniaturization of analytical devices is pushing forward the progress in integrated and compact, microfluidic-based devices at the point-of-care. In this context, novel types of flow cytometers are emerging during the search to tackle these challenges. Notwithstanding the relevance of other promising alternatives to standard optical flow cytometry (e.g., mass cytometry, various optical and electrical microcytometers), this report focuses on a recent microcytometric technology based on magnetic sensors and magnetic particles integrated into microfluidic structures for dynamic bioanalysis of fluid samples—magnetic flow cytometry. Its concept, main developments, targeted applications, as well as the challenges and trends behind this technology are presented and discussed.

Graphical abstract

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