Article
Nutrition & Dietetics
Ashley Jazzar, Danielle Jacques, Ghassan Bkaily
Summary: Insulin-induced cardiac hypertrophy is associated with changes in Na+ and Ca2+ homeostasis, with taurine pre-treatment preventing these effects. Additionally, chronic taurine treatment prevents insulin-induced morphological and ionic remodeling of cardiomyocytes.
Article
Biology
Lise M. Sjogaard-Frich, Andreas Prestel, Emilie S. Pedersen, Marc Severin, Kristian Kolby Kristensen, Johan G. Olsen, Birthe B. Kragelund, Stine Falsig Pedersen
Summary: Through various biophysical techniques, this study reveals the complex interaction mechanism between CaM and NHE1, identifying multiple states and structures of the NHE1:CaM complex that can be modulated by stoichiometries, calcium concentrations, and phosphorylation. Experimental results suggest that CaM may enhance NHE1 regulation and indicate that this structural diversity is relevant to other CaM complexes as well.
Article
Biochemistry & Molecular Biology
Xiuju Li, Benjamin Buckley, Konstantin Stoletov, Yang Jing, Marie Ranson, John D. Lewis, Mike Kelso, Larry Fliegel
Summary: This study examined the role of NHE1 and uPA in prostate cancer cell migration and colony formation, finding that only uPA activity played a critical role in cell migration and colony formation, while the effect of NHE1 was minor.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Microbiology
Joao Paulo Ferreira Rodrigues, Leonardo Loch, Thiago Souza Onofre, Nobuko Yoshida
Summary: The involvement of NHE1 in the internalization of Trypanosoma cruzi metacyclic trypomastigotes was studied. NHE1 plays a role in maintaining the activation status of diverse protein kinases and preventing inappropriate F-actin arrangement, thus affecting lysosome distribution.
Article
Cell Biology
Adam J. Trewin, Kate L. Weeks, Glenn D. Wadley, Severine Lamon
Summary: It has been found that lncRNA Tug1 regulates the expression of MCU by modulating CaMKII, thus regulating calcium signaling in cardiomyocytes. This has important implications for cardiac function.
AMERICAN JOURNAL OF PHYSIOLOGY-CELL PHYSIOLOGY
(2023)
Article
Cardiac & Cardiovascular Systems
Yu Jin Chung, Kyung Chan Park, Sergiy Tokar, Thomas R. Eykyn, William Fuller, Davor Pavlovic, Pawel Swietach, Michael J. Shattock
Summary: Research indicates that cardiac NHE1 activity is not inhibited by EMPA (or other SGLT2i's) and EMPA has no effect on [Na+] over a wide range of concentrations, including the therapeutic dose.
CARDIOVASCULAR RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Philipp Hegner, Marzena Drzymalski, Alexander Biedermann, Bernadette Memmel, Melanie Durczok, Michael Wester, Bernhard Floerchinger, Zdenek Provaznik, Christof Schmid, York Zausig, Lars S. Maier, Stefan Wagner
Summary: The novel selective NCX-inhibitor SAR296968 inhibits atrial pro-arrhythmic activity and improves diastolic and contractile function in human atrial myocardium, which may have therapeutic implications, especially for treatment of HFpEF.
Article
Cell Biology
Rui Zhao, Xianji Liu, Zenghua Qi, Xiaoqiang Yao, Suk Ying Tsang
Summary: The study found that TRPV1 channels regulate the electrophysiological characteristics of ESC-CMs by controlling calcium release from the sarcoplasmic reticulum (SR) and stimulating Na+/Ca2(+) exchanger (NCX) activity. These novel findings reveal an important interplay between TRPV1 and NCX in regulating the physiological functions of ESC-CMs.
JOURNAL OF CELLULAR PHYSIOLOGY
(2021)
Review
Cell & Tissue Engineering
Jessica C. Garbern, Richard T. Lee
Summary: Current methods to differentiate cardiomyocytes from human pluripotent stem cells inadequately recapitulate complete development, resulting in cardiomyocytes with an immature or fetal-like phenotype. Metabolic changes and mitochondrial dynamics play key roles in the maturation of cardiomyocytes, with the transitions in mitochondria responding to metabolic signals throughout development.
STEM CELL RESEARCH & THERAPY
(2021)
Review
Chemistry, Medicinal
Huiting Xia, Aqeela Zahra, Meng Jia, Qun Wang, Yunfu Wang, Susan L. Campbell, Jianping Wu
Summary: In this review, the potential role of NHE1 in cardiac hypertrophy and heart failure is discussed, along with an investigation into the underlying molecular mechanisms.
Article
Biochemistry & Molecular Biology
Pi-Cheng Cheng, Ruo-Ciao Cheng, Rong-Chi Huang
Summary: Glutamate induces Ca2+ signaling in the suprachiasmatic nucleus (SCN) by activating intracellular mechanisms involving Na+ loads, Na+/K+-ATPase (NKA), and Na+/Ca2+-exchanger (NCX). The presence of Na+ loads leads to slower Ca2+ clearance and increased rebound Ca2+ suppression. However, even in the absence of external Na+, additional Ca2+ handlers are involved in the slower Ca2+ clearance induced by glutamate.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Biochemistry & Molecular Biology
Ayako Takeuchi, Satoshi Matsuoka
Summary: The gene SLC24A6/SLC8B1 has been identified as the responsible gene for mitochondrial Na+-Ca2+ exchange for over 10 years, leading to a deeper understanding of the structure-function relationships and physiological/pathophysiological contributions of NCLX. Recent achievements regarding NCLX, focusing on its heart-specific characteristics, biophysical properties, spatial distribution in cardiomyocytes, and roles in cardiac functions under physiological and pathophysiological conditions, have been summarized in this review.
Article
Cardiac & Cardiovascular Systems
Natalia S. Torres
Summary: This study demonstrates that the skeletal Na channel isoform (Na(v)1.4) is the primary isoform involved in the priming mechanism in rabbit ventricular cells, regulating the efficiency of excitation-contraction coupling by activating reverse-mode NCX. The results suggest that Na(v)1.4 plays a crucial role in modulating the calcium handling properties during EC coupling in cardiomyocytes.
AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY
(2021)
Article
Immunology
Jose R. Lopez, Nancy Linares, Jose A. Adams, Alfredo Mijares
Summary: Chagas disease is a leading cause of death and morbidity in Latin America, and this study reveals that chronic elevation of diastolic Ca2+ concentration is associated with the disease. The role of Na+/Ca2+ exchanger (NCX) in this process is also explored, suggesting that inhibitors of NCX may be a potential therapeutic approach for Chagas cardiomyopathy.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Xu Liu, Yue Qiu, Ning Huang, Yan-Hua Liu, Huan-Huan Wang, Ya-Nan Yu, Yu-Ting Song, Guang-Rui Wan, Shuang-Xi Wang, Peng Li, Ya-Ling Yin
Summary: This study found that CT could alleviate DOX-induced cardiotoxicity in rats by regulating oxidative stress and apoptosis-related factors, as well as inhibiting NHE1 upregulation. The protective effects of CT were affected by the concurrent administration of LiCl.
JOURNAL OF BIOCHEMICAL AND MOLECULAR TOXICOLOGY
(2022)
Review
Genetics & Heredity
Sabzali Javadov, Sehwan Jang, Xavier R. Chapa-Dubocq, Zaza Khuchua, Amadou K. S. Camara
Summary: Mitochondria are the main source of ATP for cellular energy demands, and the study of ETC complexes has been focused on solid-state and fluid-state models. Respiratory supercomplexes, according to the solid-state model, play a potential role in maintaining energy balance within the cell.
JOURNAL OF MOLECULAR MEDICINE-JMM
(2021)
Article
Chemistry, Multidisciplinary
Louis J. Sparvero, Hua Tian, Andrew A. Amoscato, Wan-Yang Sun, Tamil S. Anthonymuthu, Yulia Y. Tyurina, Oleksandr Kapralov, Sabzali Javadov, Rong-Rong He, Simon C. Watkins, Nicholas Winograd, Valerian E. Kagan, Hulya Bayir
Summary: Using gas cluster ion beam secondary ion mass spectrometry (GCIB-SIMS) imaging, peroxidized phosphatidylethanolamine (PEox) could be mapped with high spatial resolution in ferroptotic cardiomyocytes and neurons after traumatic brain injury, revealing their accumulation at very low physiological levels in subcellular compartments.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Biochemistry & Molecular Biology
Andrey Kuznetsov, Sabzali Javadov, Raimund Margreiter, Michael Grimm, Judith Hagenbuchner, Michael J. Ausserlechner
Summary: Inhibition of glycolysis leads to ATP depletion in various cells but does not affect cell viability. Treatment with 2-DG enhances mitochondrial respiration and membrane potential while altering mitochondrial morphology towards network organization. Additionally, activation of AMPK and changes in mitochondrial fusion proteins were observed after 2-DG treatment.
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
(2021)
Article
Biochemistry & Molecular Biology
Sehwan Jang, Xavier R. Chapa-Dubocq, Yulia Y. Tyurina, Claudette M. St Croix, Alexandr A. Kapralov, Vladimir A. Tyurin, Hulya Bayir, Valerian E. Kagan, Sabzali Javadov
Summary: Ferroptosis is a programmed iron-dependent cell death associated with lipid peroxidation, particularly phospholipids. Mitochondria play a crucial role in ferroptosis by being sensitive to ferroptotic stimuli and contributing to lipid peroxidation. The transport of reduced glutathione to mitochondria through DIC and OGC carrier proteins plays a key role in ferroptosis, and inhibiting these carriers can aggravate the process. Additionally, dihydrolipoic acid acts as an essential cofactor for mitochondrial enzymes and can attenuate ferroptosis by directly reducing peroxidized phospholipids.
Article
Biochemistry & Molecular Biology
Andrey V. V. Kuznetsov, Sabzali Javadov, Raimund Margreiter, Judith Hagenbuchner, Michael J. J. Ausserlechner
Summary: Analyzing the function, structure, and intracellular organization of mitochondria is crucial for understanding energy metabolism and transfer. Differences between in situ and in vitro observations of mitochondria necessitate careful interpretation of experimental and clinical data. Crosstalk between mitochondria and the cell environment plays a vital role in regulating metabolism and physiology. Therefore, analyzing mitochondria in their natural setting is important.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Physiology
Sehwan Jang, Xavier R. Chapa-Dubocq, Silvia Fossati, Sabzali Javadov
Summary: The study compared the quantification of mitochondrial CRC in isolated cell mitochondria and permeabilized cells, demonstrating higher CRC in saponin-permeabilized cells. This indicates that quantifying mitochondrial CRC in cultured cells permeabilized by saponin has more advantages compared to isolated mitochondria.
FRONTIERS IN PHYSIOLOGY
(2021)
Review
Cell Biology
Rebecca M. Parodi-Rullan, Sabzali Javadov, Silvia Fossati
Summary: Alzheimer's disease and cerebral amyloid angiopathy are characterized by pathological features related to mitochondrial dysfunction, which activates inflammatory pathways leading to cerebrovascular inflammation and neurodegeneration, ultimately resulting in neuroinflammation and neurodegeneration.
Article
Cell Biology
Sehwan Jang, Xavier R. Chapa-Dubocq, Rebecca M. Parodi-Rullan, Silvia Fossati, Sabzali Javadov
Summary: This study demonstrates the toxic effects of Aβ on cell survival and mitochondria function in cardiac cells, highlighting the different impacts of Aβ(1-40) and Aβ(1-42) and the association between mitochondrial dysfunction and cell apoptosis.
Article
Biochemistry & Molecular Biology
Keishla M. Rodriguez-Graciani, Xavier R. Chapa-Dubocq, Esteban J. Ayala-Arroyo, Ivana Chaves-Negron, Sehwan Jang, Nataliya Chorna, Taber S. Maskrey, Peter Wipf, Sabzali Javadov
Summary: In this study, the metabolome of H9c2 cardioblasts during RSL3-induced ferroptosis was elucidated using gas chromatography-mass spectrometry. The results showed that RSL3 decreased the levels of amino acids involved in glutathione synthesis and increased the levels of saturated fatty acids. RSL3 also significantly altered the levels of mitochondrial tricarboxylic acid cycle intermediates. Furthermore, ferrostatin-1, XJB-5-131, and TSM-1005-44 protected against RSL3-induced cell death and preserved the metabolomic profile of the cells.
Article
Cell Biology
Xavier R. Chapa-Dubocq, Jorge F. Garcia-Baez, Jason N. Bazil, Sabzali Javadov
Summary: This study investigates the modulation of mitochondrial metabolism and function by changes in matrix Ca2+. It identifies the main mechanism responsible for mitochondrial Ca2+ overload and proposes a potential role of adenine nucleotide translocator (ANT) in the gating of mitochondrial permeability transition pores (PTP).
CELL BIOLOGY AND TOXICOLOGY
(2023)
Article
Neurosciences
Sehwan Jang, Nataliya Chorna, Keishla M. Rodriguez-Graciani, Mikhail Inyushin, Silvia Fossati, Sabzali Javadov
Summary: The study investigated the effects of amyloid-beta (Aβ) 1-40 and Aβ1-42 on the metabolism of cardiomyocytes and coronary artery endothelial cells. The results showed that Aβ1-42 affected the metabolism of different amino acids, and disrupted fatty acid metabolism in both cell types. Lipid peroxidation was increased while mitochondrial respiration was decreased in response to Aβ1-42 in both cell types. This study revealed the disruptive effects of Aβ on lipid metabolism and mitochondrial function in cardiac cells.
JOURNAL OF ALZHEIMERS DISEASE
(2023)
Article
Biochemistry & Molecular Biology
Sehwan Jang, Sabzali Javadov
Summary: Cardiolipin is a unique phospholipid that plays vital roles in resisting osmotic rupture and stabilizing large membrane proteins in the inner mitochondrial membrane. It forms covalently bonded net-like structures through oxidative polymerization, which is essential for maintaining the complex geometry of the mitochondria and gluing the quaternary structure of large protein complexes.
Article
Physiology
Sabzali Javadov
Summary: Ferroptosis is a regulated iron-dependent cell death mechanism characterized by the accumulation of peroxidized phospholipids, particularly phosphatidylethanolamine. It is involved in the pathogenesis of various human diseases, with mitochondria potentially mediating the signaling pathways of ferroptosis.
CURRENT OPINION IN PHYSIOLOGY
(2022)
Meeting Abstract
Biochemistry & Molecular Biology
Keishla Rodriguez-Graciani, Xavier Chapa-Dubocq, Nataliya Chorna, Sabzali Javadov
Meeting Abstract
Biochemistry & Molecular Biology
Xavier Chapa-Dubocq, Sehwan Jang, Esteban Ayala, Sabzali Javadov
Article
Cardiac & Cardiovascular Systems
Andrew B. Harvey, Renelyn A. Woltes, Raymond N. Deepe, Hannah G. Tarolli, Jenna R. Drummond, Allison Trouten, Auva Zandi, Jeremy L. Barth, Rupak Mukherjee, Martin J. Romeo, Silvia G. Vaena, Ge Tao, Robin Muise-Helmericks, Paula S. Ramos, Russell A. Norris, Andy Wessels
Summary: This study highlights the importance of SOX9 in the regulation of epicardial cell invasion and emphasizes the role of EPDCs in regulating atrioventricular valve development and homeostasis. It also reports a novel expression profile of Cd109, a gene with previously unknown relevance in heart development.
JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY
(2024)
Review
Cardiac & Cardiovascular Systems
MariaSanta C. Mangione, Jinhua Wen, Dian J. Cao
Summary: mTOR, a mechanistic target of rapamycin, is an evolutionarily conserved pathway that plays a fundamental role in nutrient sensing, growth, metabolism, lifespan, and aging. Recent studies have highlighted the regulatory role of mTOR in innate immune responses and its involvement in the pathogenesis of cardiovascular diseases, especially in acute inflammation and atherosclerotic cardiovascular disease. This review also discusses mTOR's role in trained immunity, immune senescence, and clonal hematopoiesis, as well as its architecture and regulatory complexes.
JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY
(2024)
Article
Cardiac & Cardiovascular Systems
Junlin Li, Yajun Gong, Yiren Wang, Huihui Huang, Huan Du, Lianying Cheng, Cui Ma, Yongxiang Cai, Hukui Han, Jianhong Tao, Gang Li, Panke Cheng
Summary: Myocardial ischemia-reperfusion injury is closely related to the final infarct size in acute myocardial infarction. Regulatory T cells play an important role in the inflammatory response after AMI, but different subtypes of Tregs have different effects on the injury.
JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY
(2024)
Article
Cardiac & Cardiovascular Systems
Yuxin Chu, Yutao Hua, Lihao He, Jin He, Yunxi Chen, Jing Yang, Ismail Mahmoud, Fanfang Zeng, Xiaochang Zeng, Gloria A. Benavides, Victor M. Darley-Usmar, Martin E. Young, Scott W. Ballinger, Sumanth D. Prabhu, Cheng Zhang, Min Xie
Summary: This study demonstrates that administering beta-hydroxybutyrate (beta-OHB) at the time of reperfusion can reduce infarct size and preserve cardiac function by activating autophagy and preserving mitochondrial homeostasis, potentially through mTOR inhibition.
JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY
(2024)