Imaging the electrocatalytic activity of single nanoparticles

An IBEC researcher has collaborated on a paper published in Nature Nanotechnology that outlines an effective new way to characterize and improve nanoparticle catalysts, which play essential roles in biomedicine, industry and everyday life by affecting the rate at which chemical reactions take place.

Nanoparticle catalysts are used in making polymers and biofuels, synthesising new drugs, pollution control devices and fuel cell technology, and both characterising them and finding more effective ones is vital.

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Smart biomaterial promotes angiogenesis

IBEC researchers have stuck tissue engineering gold with the creation of a new ‘smart’ biomaterial that triggers angiogenesis by providing the biochemical and mechanical cues needed for the process to begin.

Researchers in Josep Planell’s Biomaterials for Regenerative Therapies group, in a paper led by Elisabeth Engel, reveal their calcium phosphate glass/PLA composite that itself promotes the mobilization and differentiation of endothelial progenitor cells – those that become the cells making up the lining of blood vessels.

“In regenerative medicine, successful tissue repair hinges on being able to recreate the right environment, so that the biomaterial not only acts as a scaffold for the new tissue but also contributes to the activation of the regeneration process,” explains Elizabeth.

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Scientists discover a new type of wave in living tissues

The Integrative Cell and Tissue Dynamics group published their latest results in the quest to understand how the cells in our bodies collectively migrate in Nature Physics this week.

In studying the motion of cell clusters, the researchers detected evidence of wave-like crests of deformation launched at the edges of the clusters and propagating from cell to cell at roughly twice the speed at which cells were moving.

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‘Fingerprinting’ nanoscale objects and viruses

IBEC’s Nanoscale Bioelectrical Characterisation group are celebrating the publication of their latest results in Nature Materials this week.

In their paper “Label-free identification of single dielectric nanoparticles and viruses with ultraweak polarization forces”, Laura Fumagalli, group leader Gabriel Gomila and their colleagues present their work on a new technique to identify nano-objects such as viruses without the need for labeling, which could offer a breakthrough for biomedical diagnostics, environmental protection and nano-electronics.

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Cells mind the gap: cell protrusions close gaps in epithelia

Epithelial tissues line cavities and the surfaces of structures throughout the body, and also form many glands. During development, injury and in various disease conditions, gaps appear in the epidermis, which have to be quickly filled in.

The timely closure of the gaps that occur in these cell layers has been studied in great detail, and two possible mechanisms have been suggested; the closure of cells like the strings of a purse over a gap, and the extension of cellular protrusions by the cells surrounding the gap, which will eventually seal it. Different molecular players have been found to be key components of these mechanisms.

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How the nose knows

The mammalian sense of smell is an excellent chemical sensing system that far outshines any man-made reproduction, so researchers have long been trying to analyze and recreate the animal olfactory system to develop artificial ‘noses’.

Now researchers at IBEC have shed new light on this highly efficient system that could allow better chemical sensing systems with important applications in such critical areas as health, security or the food industry.

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The mattress test: cells do it too

Just as people are picky about the type of mattress they want to sleep on – not too hard, but not so soft either – so are cells. In fact, the rigidity of the cellular environment is so important that it can be the determining factor of whether a stem cell will differentiate into bone or fat, for example – or whether a cell behaves normally or turns cancerous.

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A breakthrough in understanding 
age-related disease

Researchers at IBEC have made an important leap towards understanding the second most common neurodegenerative illness, Parkinson’s disease (PD), which affects around 5% of the population by age 85.

Previously, it wasn’t clear whether induced pluripotent stem cells (iPSCs) – adult cells genetically reprogrammed to an embryonic stem cell-like state, which offer an unrivalled opportunity to understand many human diseases – were able to shed any light on illnesses which are age-related.

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