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Synthetic Neurons and Artificial Photoactivated Synapses

Project description

Artificial neurons

Neurons communicate with each other through structures known as synapses where electrical and chemical signals are transmitted in a regulated manner. Better understanding of the communication processes involved may lead to advanced chemical computing devices. Funded by the European Research Council, the SYNAPS project aims to develop artificial synapses to mimic natural neurons. The idea is to use liposomes as artificial cells and light as an external stimulus to synthesise and transmit messenger compounds. Researchers will mimic synapses by placing these artificial cells in specific biomolecular structures that facilitate communication. The SYNAPS setup is expected to find applications in the energy field, as well as in chemical sensing and smart drug-delivery.

Objective

The brain is a complex network of inter-connected neurons that communicate through synapses. SYNAPS aims to for the first time mimic such synapses using liposomes as artificial cells, and visible light to trigger a signal from a ‘sender’- to a ‘receiver’-liposome. Mimicking such communication processes will help with understanding how complex natural emergent properties arise, and could ultimately allow for the construction of a chemical computer. SYNAPS will excel beyond the state-of-the-art by maintaining chemical isolation between liposome interiors, ensuring local, time-bound communication between connected liposomes, and using light as an external stimulus and fuel. These concepts are essential to construct artificial tissues that can communicate on an individual liposome-to-liposome basis, in contrast to the state-of-the-art where communication generally occurs with the bulk solution. To achieve this, a messenger compound will be locally photosynthesised through transmembrane electron transfer by porphyrin dimers that portray a charge-transfer excited state. The liposomes will be organised into a synaptic cleft through the use of synthetic complementary clustering compounds that provide stable adhesion between sender and receiver liposomes. The messenger compound will be recognised by reversible and selective membrane-spanning receptors in the receiver liposome, that will output the signal through fluorescence. In addition, a reaction cascade network will be constructed involving the messenger to produce an artificial action potential, that is, a transient peak in the concentration of the messenger, ensuring a time-bound dissipative signal. Altogether, SYNAPS will provide advances in systems chemistry by providing a nanoscale platform for communication between chemically isolated systems, but also results that are useful for applications such as light-to-chemical energy conversion, chemical sensing and smart drug-delivery.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-ERC - HORIZON ERC Grants

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Call for proposal

(opens in new window) ERC-2022-STG

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Host institution

UNIVERSITAT DE BARCELONA
Net EU contribution
€ 1 688 047,00
Address
GRAN VIA DE LES CORTS CATALANES 585
08007 Barcelona
Spain
Region
Este Cataluña Barcelona
Activity type
Higher or Secondary Education Establishments
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Total cost
€ 1 688 047,00

Beneficiaries (1)