Speroid Cell Culture Microfluidic Platform

What is a spheroid, and why do we use it in cell culture research?

A spheroid is a sphere-shaped, three-dimensional cell aggregate that allows cells to proliferate and migrate in a way that closely mimics their natural organization inside the human body. Unlike flat, monolayer cultures in Petri dishes, spheroids replicate cell-to-cell interactions and the physiological architecture of living tissue. They are considered the gold standard tumor cellular model, but are also widely used to study neurodegenerative diseases and test drug efficacy without relying on animal models.

What are the drawbacks of spheroid traditional monoculture?

Normal batch static culture does not provide dynamic conditions as provided in vivo. It is poorly reproducible, has little control over factors such as pH, temperature, and shear stress, and automation of long-term experiments is difficult. The rate of reagent use is high as well, and there is virtually no possibility of isolating and studying just one spheroid over time. These limitations reduce the validity of drug screening findings and increase the cost of experiments.

What is the benefit of microfluidics in enhancing the culture of the spheroid cell?

Microfluidic perfusion presents continuous, regulated fluid flow through the chip, and this presents a number of tangible benefits:

-Physiological shear stress is used incessantly, making it more in vivo-like.

-Nutrient and oxygen supply to the cells is enhanced,

-Long-term experiments can be automated and do not require human involvement.

-Strict doses of drugs or compounds can be injected in sequence,

-There is a high reduction in the reagent and medium consumption,

Differentiable and consistent reproducibility between spheroids is improved.

What is the MIC Spheroid Cell Culture Pack?

The pack is a plug-and-play platform that enables the transition from static to dynamic microfluidic culture for researchers. It includes:

-A pressure-driven flow controller without pulses,

-Flow sensors for continuous flow rate monitoring (Galileo, MIC),

-A recirculation bridge to sustain constant shear stress.

-A sequential injection system to inject various media or drug substances,

-Fittings, tubings, reservoirs, and an optional dedicated spheroid chip are all compatible.

-Automation software and control of the parameters of sequences,

-User instructions on a step-by-step basis for each instrument.

All the parts are compatible and operate through the same software interface.

What advantages does pressure-driven flow control over syringe or peristaltic pumps have on the culture of the spheroid?

Pressure-driven systems generate stable, highly responsive flow. This is extremely important in spheroid culture, since any change in flow is directly converted into an uneven shear stress on the cells. Syringe pumps cause mechanical pulsations, and peristaltic pumps cause periodic pressure fluctuations, both of which undermine the physiological relevance of the culture model. The flow controller in the MIC pack offers better accuracy and stability, which are necessary for long, controlled experiments.

Does long-term medium recirculation play a role in long-term spheroid experiments?

Continuous replenishment of fresh medium in a single-pass arrangement is prohibitively expensive, particularly with special or expensive media, in experiments that require more than a few days. Recirculation enables the same medium to be recirculated through the chip several times using a recirculation bridge or active valves, ensuring that shear stress remains constant and sufficient nutrients are delivered without requiring large volumes. This contributes to the economic feasibility and the strength of the long-spheroid culture experiments.

In which applications is this platform applicable?

The spheroid cell culture pack is applicable to:

-The development of tumor models and screening of oncology drugs,

-A 3D modeling of neurodegenerative disease with neuronal spheroids,

-Pharmacokinetic and drug efficacy evaluation under physiological flow,

-High-throughput screening using multi-spheroid chip configurations (up to 20+ spheroids in parallel).

-Single spheroid observation and longitudinal monitoring under a microscope.

The transparent chip design also allows them to be directly integrated with optical and fluorescence microscopy.

How user-friendly is the pack to particular research requirements?

It has a very modular platform. It can be modified by researchers to suit a variety of different chip geometries and surface modifications, flow configurations, or by adding other injection valves to support multi-drug protocols. MIC experts are offering special assistance to align the platform with cell types, sphere sizes, and experimental endpoints. Any commercially available chip and the design made in the labs can be used with the system.

How can MIC be involved in a Horizon Europe consortium?

MIC is a microfluidics SME with a long history of involvement in EU-funded research consortia, including projects sponsored by the French ANR within ERA-NET frameworks. In a Horizon Europe project, MIC can play a role as a non-academic beneficiary or technology partner, which can offer:

-Microfluidic hardware and automation parts of complicated bioassays,

-First deliverables, which are prototypical and anchor work packages with real, tangible milestones,

-Development of application-specific platforms, including organ-on-chip and disease-relevant model platforms (e.g., spheroid).

-Risk-proofed manufacturable designs, giving technical credibility to reviewers.