Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
An Ultrasensitive Genetically Encoded Voltage Indicator Uncovers the Electrical Activity of Non‐Excitable Cells
https://orcid.org/0000-0002-3554-3107
AbstractMost animal cell types are classified as non‐excitable because they do not generate action potentials observed in excitable cells, such as neurons and muscle cells. Thus, resolving voltage signals in non‐excitable cells demands sensors with exceptionally high voltage sensitivity. In this study, the ultrabright, ultrasensitive, and calibratable genetically encoded voltage sensor rEstus is developed using structure‐guided engineering. rEstus is most sensitive in the resting voltage range of non‐excitable cells and offers a 3.6‐fold improvement in brightness change for fast voltage spikes over its precursor ASAP3. Using rEstus, it is uncovered that the membrane voltage in several non‐excitable cell lines (A375, HEK293T, MCF7) undergoes spontaneous endogenous alterations on a second to millisecond timescale. Correlation analysis of these optically recorded voltage alterations provides a direct, real‐time readout of electrical cell–cell coupling, showing that visually connected A375 and HEK293T cells are also largely electrically connected, while MCF7 cells are only weakly coupled. The presented work provides enhanced tools and methods for non‐invasive voltage imaging in living cells and demonstrates that spontaneous endogenous membrane voltage alterations are not limited to excitable cells but also occur in a variety of non‐excitable cell types.
An Ultrasensitive Genetically Encoded Voltage Indicator Uncovers the Electrical Activity of Non‐Excitable Cells
https://orcid.org/0000-0002-3554-3107
AbstractMost animal cell types are classified as non‐excitable because they do not generate action potentials observed in excitable cells, such as neurons and muscle cells. Thus, resolving voltage signals in non‐excitable cells demands sensors with exceptionally high voltage sensitivity. In this study, the ultrabright, ultrasensitive, and calibratable genetically encoded voltage sensor rEstus is developed using structure‐guided engineering. rEstus is most sensitive in the resting voltage range of non‐excitable cells and offers a 3.6‐fold improvement in brightness change for fast voltage spikes over its precursor ASAP3. Using rEstus, it is uncovered that the membrane voltage in several non‐excitable cell lines (A375, HEK293T, MCF7) undergoes spontaneous endogenous alterations on a second to millisecond timescale. Correlation analysis of these optically recorded voltage alterations provides a direct, real‐time readout of electrical cell–cell coupling, showing that visually connected A375 and HEK293T cells are also largely electrically connected, while MCF7 cells are only weakly coupled. The presented work provides enhanced tools and methods for non‐invasive voltage imaging in living cells and demonstrates that spontaneous endogenous membrane voltage alterations are not limited to excitable cells but also occur in a variety of non‐excitable cell types.
An Ultrasensitive Genetically Encoded Voltage Indicator Uncovers the Electrical Activity of Non‐Excitable Cells
https://orcid.org/0000-0002-3554-3107
AbstractMost animal cell types are classified as non‐excitable because they do not generate action potentials observed in excitable cells, such as neurons and muscle cells. Thus, resolving voltage signals in non‐excitable cells demands sensors with exceptionally high voltage sensitivity. In this study, the ultrabright, ultrasensitive, and calibratable genetically encoded voltage sensor rEstus is developed using structure‐guided engineering. rEstus is most sensitive in the resting voltage range of non‐excitable cells and offers a 3.6‐fold improvement in brightness change for fast voltage spikes over its precursor ASAP3. Using rEstus, it is uncovered that the membrane voltage in several non‐excitable cell lines (A375, HEK293T, MCF7) undergoes spontaneous endogenous alterations on a second to millisecond timescale. Correlation analysis of these optically recorded voltage alterations provides a direct, real‐time readout of electrical cell–cell coupling, showing that visually connected A375 and HEK293T cells are also largely electrically connected, while MCF7 cells are only weakly coupled. The presented work provides enhanced tools and methods for non‐invasive voltage imaging in living cells and demonstrates that spontaneous endogenous membrane voltage alterations are not limited to excitable cells but also occur in a variety of non‐excitable cell types.
An Ultrasensitive Genetically Encoded Voltage Indicator Uncovers the Electrical Activity of Non‐Excitable Cells
Advanced Science
Rühl, Philipp (Autor:in) / Nair, Anagha G. (Autor:in) / Gawande, Namrata (Autor:in) / Dehiwalage, Sassrika N. C. W. (Autor:in) / Münster, Lukas (Autor:in) / Schönherr, Roland (Autor:in) / Heinemann, Stefan H. (Autor:in)
Advanced Science ; 11
01.05.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| Wiley | 2024
Genetically encoded ``smart'' peptide polymers for biomedicine
| British Library Online Contents | 2014
British Library Online Contents | 2016
Electrical properties of Na^+ channels in excitable membranes
| British Library Online Contents | 1994
An electrical model for ion channels in excitable membranes
| British Library Online Contents | 1994