Single cell analysis: spectral cytometry

Leader

Dra. Eulalia Rodríguez Martín

Personnel

Paula Batres Faba (TGS Lab)

Contact

Hospital Universitario Ramón y Cajal

Servicio de Inmunología

Planta -1 izquierda

paulabatres03(ELIMINAR)@gmail.com

eulalia.rodriguez@salud.madrid.org

  • Spectral cytometry: description and highlights

    The service


    In the Single Cell Analysis service, we use advanced cytometry techniques, combining conventional cytometers and a spectral cytometer with a sorting module. Flow cytometry is a technique that allows the simultaneous measurement of multiple optical characteristics (light scattering and fluorescence) of each of the cells or particles present in a suspension. This allows us to define the properties of a cell population or its subpopulations. Cytometers have a combined flow, optical and electronic system to carry out this process. The flow system introduces and restricts the cells for individual analysis, the optical system excites the sample and collects the light signals coming from the sample, and the electronic system converts the optical signal into an electronic signal and digitises it for computer analysis.

    Current research studies in the field of cell biology investigate the individual properties of the cells that make up a system. To do this, it is necessary to be able to purify cell populations in order to remove them from a sample or to enrich it. Cell sorting by flow cytometry or cell sorting, carried out by separation of electrically charged droplets, is the process of physically separating cell populations that differ in one or more parameters that are analysable by flow cytometry. This process is essential in investigations of complex biological processes, such as immune response and disease progression. Our unit is designed to facilitate innovative discoveries through these cutting-edge technologies.

    Conventional cytometers offer highly resolved analyses, but are limited in the number of fluorochromes they can detect simultaneously and require offsets, one of the most complex elements in the use of cytometry. In contrast, spectral cytometry allows potentially more than 25 fluorochromes to be discriminated in a single marker tube, without requiring compensation between the different fluorochromes. It also allows the use of very similar fluorescent molecules as they can be distinguished from each other due to the unique spectral fingerprint that allows them to be differentiated.

    Highlights

    • Advice on suitable panels and monoclonal antibodies on a customised basis for each investigation
    • Portfolio of conventional and spectral flow cytometry services
    • Possibility of isolating and collecting specific cells based on their unique characteristics, facilitating more precise and personalised subsequent studies in collaboration with the IRYCIS Central Support Units.
  • Availability

  • Equipment
    • 1 Cytek CS Aurora 3-laser (36 colours) spectral cytometer with sorting module - Infrastructure financed by the Instituto de Salud Carlos III (ISCIII) and Next Generation EU funds (IFEQ21/00175).

    This equipment has 41 detectors (38 fluorescence, 2 SSC and 1 FSC). In addition, the equipment is installed with a laminar flow hood and has nozzles of 70, 85, 100 and 130 microns. It is capable of separating 4 lanes in 5 millilitre tubes, 6 lanes in eppendorf tubes and 96-well plates. In addition, it can maintain both the sample and the collection tubes at the chosen temperature. Analysis software: SpectroFlo.

    • 2 FACSLyric with 3 lasers (blue, red and violet) with 12 colours. High sensitivity

    • 1 FACSCANTO II 3-laser (blue, red and violet) with 8 colours

  • Services portfolio
    • Sorting Aurora CS 1 sample
    • Acquisition Aurora CS 1 sample
    • 3-laser FACSLyric (12 colours)
    • 3-laser FACsCANTO II (8 colours)
    • Study design (including: selection of populations, choice of markers and fluorochromes, compensation matrix) Essential before acquisition and/or sorting
    • Set-up of new experiments (including: negative controls, spectral profiling, QC control) Essential prior to acquisition and/or sorting.
    • Set-up of new fluorochromes 
    • Analysis of conventional and spectral cytometry data
    • Use of workstation with FlowJo software (Aurora) (per hour)
    • Use of workstation with Infinicyt software (per hour)
    • Study and immunophenotypic screening of mastocytosis in Spectral Cytometry (processing, marking and analysis).
    • Study and immunophenotypic screening of mastocytosis on Spectral Cytometer (processing, marking, analysis and cell population separation).
    • CAR-T Cells monitoring study (processing, marking and analysis)
    • CAR-T Cells separation
    • Scientific and technical advice and technical support