Lorenzo Moroni

Sheet stacking could be an option. On Earth, technologies exist that can place and fuse tissue sheets using robotic systems. In microgravity, it would be more challenging to implement, but in principle, it’s technically possible and could make sense if the right technology is developed.

In principle, yes. Magnetic devices are currently insulated, but even with partial loss of insulation, the low magnetic field strengths we use should not pose significant problems. The potential interaction with other magnetic devices, such as future portable MRI machines, would need to be evaluated case by case.

Parabolic flights cannot fully reproduce continuous microgravity, but they are essential testbeds. They allow us to demonstrate that our technology works in microgravity conditions before moving to the ISS. In our case, we will focus on imaging data during each parabola to confirm whether levitation and assembly occur as expected.

Yes, gadolinium is toxic at high concentrations, though it is already used in medicine as a paramagnetic agent for MRI at safe doses. Other paramagnetic agents are far more toxic and were excluded from consideration. If this technology is applied to different cell types, specific toxicity testing will be required.

Placenta-derived matrix will always be allogenic, but partners like METATISSUE are working on standardization. They process placentas from multiple donors into blended, quality-controlled products to minimize variability. This should ensure a reliable and safe material, even in space applications.

Yes, although adapting it for Earth use is challenging because it is designed for microgravity. On Earth, much larger magnets would be required. Still, the technology has potential advantages: it could assemble tissue patches of about one cubic centimeter within minutes, with full fusion in a few hours. Conventional bioprinting usually takes much longer. Levitation also allows easier parallelization, producing multiple constructs simultaneously. The main competitor in speed is volumetric bioprinting, but that method depends on photo-reactive materials, which raise concerns about long-term cell compatibility.

The printing process itself should not induce mutations. However, cosmic radiation—particularly long-term or high-intensity exposure—could increase mutation rates. This is a general spaceflight risk rather than a specific issue with the printing technology.