Atomic force and electron microscopic-based study of sarcolemmal surface of living cardiomyocytes unveils unexpected mitochondrial shift in heart failure

E Dague, G Genet, V Lachaize… - Journal of Molecular and …, 2014 - Elsevier
Loss of T-tubules (TT), sarcolemmal invaginations of cardiomyocytes (CMs), was recently
identified as a general heart failure (HF) hallmark. However, whether TT per se or the overall …

Opto-SICM framework combines optogenetics with scanning ion conductance microscopy for probing cell-to-cell contacts

Q Song, A Alvarez-Laviada, SE Schrup… - Communications …, 2023 - nature.com
We present a novel framework, Opto-SICM, for studies of cellular interactions in live cells
with high spatiotemporal resolution. The approach combines scanning ion conductance …

Junctophilins: key membrane tethers in muscles and neurons

CA Piggott, Y Jin - Frontiers in Molecular Neuroscience, 2021 - frontiersin.org
Contacts between the endoplasmic reticulum (ER) and plasma membrane (PM) contain
specialized tethering proteins that bind both ER and PM membranes. In excitable cells, ER …

Age-Dependent Maturation of iPSC-CMs Leads to the Enhanced Compartmentation of β2AR-cAMP Signalling

A Hasan, N Mohammadi, A Nawaz, T Kodagoda… - Cells, 2020 - mdpi.com
The ability to differentiate induced-pluripotent stem cells into cardiomyocytes (iPSC-CMs)
has opened up novel avenues for potential cardiac therapies. However, iPSC-CMs exhibit a …

Ultrafast imaging of cardiomyocyte contractions by combining scanning ion conductance microscopy with a microelectrode array

S Simeonov, TE Schäffer - Analytical chemistry, 2019 - ACS Publications
Beating cardiomyocytes undergo fast morphodynamics during the contraction–relaxation
cycle. However, imaging these morphodynamics with a high spatial and temporal resolution …

A functional role for transverse (t-) tubules in the atria

KM Dibb, JD Clarke, DA Eisner, MA Richards… - Journal of molecular and …, 2013 - Elsevier
Mammalian ventricular myocytes are characterised by the presence of an extensive
transverse (t-) tubule network which is responsible for the synchronous rise of intracellular …

In situ single photon confocal imaging of cardiomyocyte T-tubule system from Langendorff-perfused hearts

B Chen, C Zhang, A Guo, LS Song - Frontiers in physiology, 2015 - frontiersin.org
Transverse tubules (T-tubules) are orderly invaginations of the sarcolemma in mammalian
cardiomyocytes. The integrity of T-tubule architecture is critical for cardiac excitation …

[HTML][HTML] Membrane capacitance and characteristic frequency are associated with contractile properties of skeletal muscle

Y Yamada, K Hirata, N Iida, A Kanda, M Shoji… - Medical Engineering & …, 2022 - Elsevier
The cell membrane capacitance (Cm) and characteristic frequencies (fc) of tissues can be
obtained using segmental bioelectrical impedance spectroscopy (S-BIS). Higher Cm and …

Cardiomyocyte Ca2+ handling and structure is regulated by degree and duration of mechanical load variation

M Ibrahim, P Kukadia, U Siedlecka… - Journal of Cellular …, 2012 - Wiley Online Library
Cardiac transverse (t)‐tubules are altered during disease and may be regulated by stretch‐
sensitive molecules. The relationship between variations in the degree and duration of load …

The insulin receptor family in the heart: new light on old insights

A Clerk, PH Sugden - Bioscience reports, 2022 - portlandpress.com
Insulin was discovered over 100 years ago. Whilst the first half century defined many of the
physiological effects of insulin, the second emphasised the mechanisms by which it elicits …