optical-control-living-cells-electrical-activity-conjugated

Optical Control of Living Cells Electrical Activity by Conjugated Polymers

Hybrid interfaces between organic semiconductors and living tissues represent a new tool for in-vitro and in-vivo applications. In particular, conjugated ...

Istituto Italiano di Tecnologia

Strategies involved in mesenchymal stem cell (MSC) differentiation toward neuronal cells for screening purposes are characterized by quality and quantity issues. Differentiated cells are often scarce with respect to starting undifferentiated population, and the differentiation process is usually quite long, with high risk of contamination and low yield efficiency. Here, we describe a novel simple method to induce direct differentiation of MSCs into neuronal cells, without neurosphere formation. Differentiated cells are characterized by clear morphological changes, expression of neuronal specific markers, showing functional response to depolarizing stimuli and electrophysiological properties similar to those of developing neurons. The method described here represents a valuable tool for future strategies aimed at personalized screening of therapeutic agents in vitro.

A simple method to generate adipose stem cell-derived neurons for screening purposes.

To speed up the osteointegration process, surface-treated titanium has been widely used in dental and orthopedic applications. The present work describes a new silicon-based anodic spark deposition (ASD) treatment and investigates the properties of the surfaces obtained, focusing on their capability to modulate the osteogenic differentiation potential of adult mesenchymal stem cells (MSCs).

Mesenchymal stem cell differentiation on electrochemically modified titanium: an optimized approach for biomedical  applications.

Hybrid interfaces between organic semiconductors and living tissues represent a new tool for in-vitro and in-vivo applications, bearing a huge potential, from basic researches to clinical applications. In particular, light sensitive conjugated polymers can be exploited as a new approach for optical modulation of cellular activity. In this work we focus on light-induced changes in the membrane potential of Human Embryonic Kidney (HEK-293) cells grown on top of a poly(3-hexylthiophene) (P3HT) thin film. On top of a capacitive charging of the polymer interface, we identify and fully characterize two concomitant mechanisms, leading to membrane depolarization and hyperpolarisation, both mediated by a thermal effect. Our results can be usefully exploited in the creation of a new platform for light-controlled cell manipulation, with possible applications in neuroscience and medicine.

Caterina Bossio

Center for Nano Science and Technology @PoliMi

Istituto Italiano di Tecnologia

Optical Control of Living Cells Electrical Activity by Conjugated Polymers

Caterina Bossio

.css-o250i3{font-size:18px;font-family:Open Sans,sans-serif;line-height:21.6px;}Center for Nano Science and Technology @PoliMi

Istituto Italiano di Tecnologia

Optical Control of Living Cells Electrical Activity by Conjugated Polymers

Center for Nano Science and Technology @PoliMi