Piezo buffers mechanical stress via modulation of intracellular Ca<sup>2+</sup> handling in the Drosophila heart

Authors: Zechini, L., Camilleri-Brennan, J., Walsh, J., Beaven, R., Moran, O., Hartley, P.S., Diaz, M. and Denholm, B.

Journal: Frontiers in Physiology

Volume: 13

eISSN: 1664-042X

DOI: 10.3389/fphys.2022.1003999

Abstract:

Throughout its lifetime the heart is buffeted continuously by dynamic mechanical forces resulting from contraction of the heart muscle itself and fluctuations in haemodynamic load and pressure. These forces are in flux on a beat-by-beat basis, resulting from changes in posture, physical activity or emotional state, and over longer timescales due to altered physiology (e.g. pregnancy) or as a consequence of ageing or disease (e.g. hypertension). It has been known for over a century of the heart’s ability to sense differences in haemodynamic load and adjust contractile force accordingly (Frank, Z. biology, 1895, 32, 370–447; Anrep, J. Physiol., 1912, 45 (5), 307–317; Patterson and Starling, J. Physiol., 1914, 48 (5), 357–79; Starling, The law of the heart (Linacre Lecture, given at Cambridge, 1915), 1918). These adaptive behaviours are important for cardiovascular homeostasis, but the mechanism(s) underpinning them are incompletely understood. Here we present evidence that the mechanically-activated ion channel, Piezo, is an important component of the Drosophila heart’s ability to adapt to mechanical force. We find Piezo is a sarcoplasmic reticulum (SR)-resident channel and is part of a mechanism that regulates Ca2+ handling in cardiomyocytes in response to mechanical stress. Our data support a simple model in which Drosophila Piezo transduces mechanical force such as stretch into a Ca2+ signal, originating from the SR, that modulates cardiomyocyte contraction. We show that Piezo mutant hearts fail to buffer mechanical stress, have altered Ca2+ handling, become prone to arrhythmias and undergo pathological remodelling.

http://eprints.bournemouth.ac.uk/37396/

Source: Scopus

Piezo buffers mechanical stress via modulation of intracellular Ca2+ handling in the Drosophila heart.

Authors: Zechini, L., Camilleri-Brennan, J., Walsh, J., Beaven, R., Moran, O., Hartley, P.S., Diaz, M. and Denholm, B.

Journal: Front Physiol

Volume: 13

Pages: 1003999

ISSN: 1664-042X

DOI: 10.3389/fphys.2022.1003999

Abstract:

Throughout its lifetime the heart is buffeted continuously by dynamic mechanical forces resulting from contraction of the heart muscle itself and fluctuations in haemodynamic load and pressure. These forces are in flux on a beat-by-beat basis, resulting from changes in posture, physical activity or emotional state, and over longer timescales due to altered physiology (e.g. pregnancy) or as a consequence of ageing or disease (e.g. hypertension). It has been known for over a century of the heart's ability to sense differences in haemodynamic load and adjust contractile force accordingly (Frank, Z. biology, 1895, 32, 370-447; Anrep, J. Physiol., 1912, 45 (5), 307-317; Patterson and Starling, J. Physiol., 1914, 48 (5), 357-79; Starling, The law of the heart (Linacre Lecture, given at Cambridge, 1915), 1918). These adaptive behaviours are important for cardiovascular homeostasis, but the mechanism(s) underpinning them are incompletely understood. Here we present evidence that the mechanically-activated ion channel, Piezo, is an important component of the Drosophila heart's ability to adapt to mechanical force. We find Piezo is a sarcoplasmic reticulum (SR)-resident channel and is part of a mechanism that regulates Ca2+ handling in cardiomyocytes in response to mechanical stress. Our data support a simple model in which Drosophila Piezo transduces mechanical force such as stretch into a Ca2+ signal, originating from the SR, that modulates cardiomyocyte contraction. We show that Piezo mutant hearts fail to buffer mechanical stress, have altered Ca2+ handling, become prone to arrhythmias and undergo pathological remodelling.

http://eprints.bournemouth.ac.uk/37396/

Source: PubMed

Piezo buffers mechanical stress via modulation of intracellular Ca2+ handling in the Drosophila heart

Authors: Zechini, L., Camilleri-Brennan, J., Walsh, J., Beaven, R., Moran, O., Hartley, P.S.S., Diaz, M. and Denholm, B.

Journal: FRONTIERS IN PHYSIOLOGY

Volume: 13

eISSN: 1664-042X

DOI: 10.3389/fphys.2022.1003999

http://eprints.bournemouth.ac.uk/37396/

Source: Web of Science (Lite)

Piezo buffers mechanical stress via modulation of intracellular Ca 2+ handling in the Drosophila heart

Authors: Zechini, L., Camilleri-Brennan, J., Walsh, J., Beavan, R., Moran, O., Hartley, P., Diaz, M. and Denholm, B.

Journal: Frontiers in Physiology

Publisher: Frontiers Media

ISSN: 1664-042X

Abstract:

Throughout its lifetime the heart is buffeted continuously by dynamic mechanical forces resulting from contraction of the heart muscle itself and fluctuations in haemodynamic load and pressure. These forces are in flux on a beat-by-beat basis, resulting from changes in posture, physical activity or emotional state, and over longer timescales due to altered physiology (e.g. pregnancy) or as a consequence of ageing or disease (e.g. hypertension). It has been known for over a century of the heart’s ability to sense differences in haemodynamic load and adjust contractile force accordingly[1-4]. These adaptive behaviours are important for cardiovascular homeostasis, but the mechanism(s) underpinning them are incompletely understood. Here we present evidence that the mechanically-activated ion channel, Piezo, is an important component of the Drosophila heart’s ability to adapt to mechanical force. We find Piezo is a sarcoplasmic reticulum (SR)-resident channel and is part of a mechanism that regulates Ca2+ handling in cardiomyocytes in response to mechanical stress. Our data support a simple model in which Drosophila Piezo transduces mechanical force such as stretch into a Ca2+ signal, originating from the SR, that modulates cardiomyocyte contraction. We show that Piezo mutant hearts fail to buffer mechanical stress, have altered Ca2+ handling, become prone to arrhythmias and undergo pathological remodelling.

http://eprints.bournemouth.ac.uk/37396/

Source: Manual

Piezo buffers mechanical stress via modulation of intracellular Ca<sup>2+</sup> handling in the <i>Drosophila</i> heart.

Authors: Zechini, L., Camilleri-Brennan, J., Walsh, J., Beaven, R., Moran, O., Hartley, P.S., Diaz, M. and Denholm, B.

Journal: Frontiers in physiology

Volume: 13

Pages: 1003999

eISSN: 1664-042X

ISSN: 1664-042X

DOI: 10.3389/fphys.2022.1003999

Abstract:

Throughout its lifetime the heart is buffeted continuously by dynamic mechanical forces resulting from contraction of the heart muscle itself and fluctuations in haemodynamic load and pressure. These forces are in flux on a beat-by-beat basis, resulting from changes in posture, physical activity or emotional state, and over longer timescales due to altered physiology (e.g. pregnancy) or as a consequence of ageing or disease (e.g. hypertension). It has been known for over a century of the heart's ability to sense differences in haemodynamic load and adjust contractile force accordingly (Frank, Z. biology, 1895, 32, 370-447; Anrep, J. Physiol., 1912, 45 (5), 307-317; Patterson and Starling, J. Physiol., 1914, 48 (5), 357-79; Starling, The law of the heart (Linacre Lecture, given at Cambridge, 1915), 1918). These adaptive behaviours are important for cardiovascular homeostasis, but the mechanism(s) underpinning them are incompletely understood. Here we present evidence that the mechanically-activated ion channel, Piezo, is an important component of the Drosophila heart's ability to adapt to mechanical force. We find Piezo is a sarcoplasmic reticulum (SR)-resident channel and is part of a mechanism that regulates Ca2+ handling in cardiomyocytes in response to mechanical stress. Our data support a simple model in which Drosophila Piezo transduces mechanical force such as stretch into a Ca2+ signal, originating from the SR, that modulates cardiomyocyte contraction. We show that Piezo mutant hearts fail to buffer mechanical stress, have altered Ca2+ handling, become prone to arrhythmias and undergo pathological remodelling.

http://eprints.bournemouth.ac.uk/37396/

Source: Europe PubMed Central

Piezo buffers mechanical stress via modulation of intracellular Ca 2+ handling in the Drosophila heart

Authors: Zechini, L., Camilleri-Brennan, J., Walsh, J., Beavan, R., Moran, O., Hartley, P., Diaz, M. and Denholm, B.

Journal: Frontiers in Physiology

Volume: 13

Publisher: Frontiers Media

ISSN: 1664-042X

Abstract:

Throughout its lifetime the heart is buffeted continuously by dynamic mechanical forces resulting from contraction of the heart muscle itself and fluctuations in haemodynamic load and pressure. These forces are in flux on a beat-by-beat basis, resulting from changes in posture, physical activity or emotional state, and over longer timescales due to altered physiology (e.g. pregnancy) or as a consequence of ageing or disease (e.g. hypertension). It has been known for over a century of the heart’s ability to sense differences in haemodynamic load and adjust contractile force accordingly[1-4]. These adaptive behaviours are important for cardiovascular homeostasis, but the mechanism(s) underpinning them are incompletely understood. Here we present evidence that the mechanically-activated ion channel, Piezo, is an important component of the Drosophila heart’s ability to adapt to mechanical force. We find Piezo is a sarcoplasmic reticulum (SR)-resident channel and is part of a mechanism that regulates Ca2+ handling in cardiomyocytes in response to mechanical stress. Our data support a simple model in which Drosophila Piezo transduces mechanical force such as stretch into a Ca2+ signal, originating from the SR, that modulates cardiomyocyte contraction. We show that Piezo mutant hearts fail to buffer mechanical stress, have altered Ca2+ handling, become prone to arrhythmias and undergo pathological remodelling.

http://eprints.bournemouth.ac.uk/37396/

Source: BURO EPrints