Article
Physiology
Isabelle Duroux-Richard, Florence Apparailly, Maroun Khoury
Summary: Research indicates that MitomiR plays a crucial role in mitochondrial functions, with specific miRNAs associated with inflammation. MitomiR may impact the development of inflammatory disorders by regulating macrophage differentiation and immune functions.
FRONTIERS IN PHYSIOLOGY
(2021)
Article
Cardiac & Cardiovascular Systems
Huijing Yu, Fang Zhang, Pengyi Yan, Shasha Zhang, Yingmei Lou, Zilong Geng, Zixuan Li, Yan Zhang, Yuejuan Xu, Yanan Lu, Chen Chen, Daowen Wang, Wei Zhu, Xinyang Hu, Jian'an Wang, Tao Zhuang, Yuzhen Zhang, Gengze Wu, Junling Liu, Chunyu Zeng, William T. Pu, Kun Sun, Bing Zhang
Summary: LARP7 plays a crucial role in mitochondrial biogenesis, energy production, and cardiac function by modulating SIRT1 homeostasis and activity. Reduction of LARP7 in diseased hearts contributes to heart failure pathogenesis, while restoring LARP7 in the injured heart confers myocardial protection, identifying the ATM-LARP7-SIRT1 pathway as a potential therapeutic target in heart failure.
Article
Cell Biology
Hyunjung Lee, Young In Kim, Farida S. Nirmala, Ji-Sun Kim, Hyo-Deok Seo, Tae Youl Ha, Young-Jin Jang, Chang Hwa Jung, Jiyun Ahn
Summary: Post-menopausal conditions exacerbate the biological aging process, leading to visceral adiposity and sarcopenia. Mitochondrial impairment, along with the upregulation of miR-141-3p and subsequent downregulation of Fkbp5 and Fibin, plays a role in the development of obesogenic sarcopenia. Inhibiting miR-141-3p could be a potential therapeutic target for alleviating this condition.
Review
Biochemistry & Molecular Biology
Haikel Dridi, Gaetano Santulli, Laith Bahlouli, Marco C. Miotto, Gunnar Weninger, Andrew R. Marks
Summary: Heart failure is a global health challenge characterized by defective calcium handling, mitochondrial calcium overload, and oxidative stress. Calcium not only regulates contraction in cardiomyocytes, but also affects mitochondrial metabolism and oxidative stress signaling. Understanding the mechanisms of mitochondrial calcium uptake and the regulation of increased calcium influx is crucial for identifying therapeutic targets for heart failure.
Article
Cardiac & Cardiovascular Systems
Olga M. Rusiecka, Filippo Molica, Morten S. Nielsen, Axel Tollance, Sandrine Morel, Maud Frieden, Marc Chanson, Kerstin Boengler, Brenda R. Kwak
Summary: This study found that deletion of the Pannexin1 (Panx1) gene in cardiac endothelial cells can alleviate cardiac ischaemia/reperfusion (I/R) injury and improve left ventricular function recovery. This cardioprotective effect seems to be mediated through its influence on cardiac mitochondria rather than reducing the inflammatory response. Therefore, Panx1 may represent a new target for controlling cardiac reperfusion damage.
CARDIOVASCULAR RESEARCH
(2023)
Article
Cell Biology
Courtney E. Petersen, Junhui Sun, Kavisha Silva, Anna Kosmach, Robert S. Balaban, Elizabeth Murphy
Summary: The regulation of cell death by mitochondrial calcium overload and the potential role of mitochondrial calcium uniporter (MCU) in preventing cell death during ischemia/reperfusion are investigated using ex-vivo-perfused mouse hearts. It is found that inhibition of MCU reduces mitochondrial calcium accumulation during ischemia, but there is still an increase in mitochondrial calcium, suggesting that mitochondrial calcium overload is not solely dependent on MCU.
Review
Cell Biology
Evanthia Pangou, Izabela Sumara
Summary: Mitosis ensures genome integrity by precisely segregating genetic material, while also tightly coordinating the segregation of subcellular organelles, such as mitochondria, to meet energy demands and facilitate their efficient inheritance. Mitochondria, highly dynamic organelles, undergo fission, fusion, and transport events during the cell cycle, with kinases phosphorylating key factors to drive fragmentation for distribution to daughter cells. This review highlights the complex regulatory networks linking mitotic factors, mitochondrial dynamics, and potential implications in human disease.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2021)
Review
Pharmacology & Pharmacy
Chunfang Wang, Yating Wang, Li Shen
Summary: Heart failure is still the leading cause of death worldwide, with mitochondrial dysfunction considered a critical node in its development. SIRT3, by improving mitochondrial function, can delay the progression of HF.
PHARMACOLOGICAL RESEARCH
(2021)
Article
Cell Biology
Jessica N. Peoples, Nasab Ghazal, Duc M. Duong, Katherine R. Hardin, Janet R. Manning, Nicholas T. Seyfried, Victor Faundez, Jennifer Q. Kwong
Summary: Mitochondria can trigger various signaling pathways under stress conditions, with mitochondrial energy dysfunction leading to a pattern of acylome remodeling. This remodeling specifically impacts mitochondrial proteins, with acetylation and malonylation modifying the interactome and enzyme activity within mitochondria. Additionally, a novel cross talk between acetylation and malonylation was discovered, indicating a mechanism by which disruption to energy production can impact global mitochondrial function.
AMERICAN JOURNAL OF PHYSIOLOGY-CELL PHYSIOLOGY
(2021)
Article
Cell Biology
Cesar Vasquez-Trincado, Mario Navarro-Marquez, Pablo E. Morales, Francisco Westermeier, Mario Chiong, Valentina Parra, Alejandra Espinosa, Sergio Lavandero
Summary: Cardiovascular diseases caused by high-fat foods are on the rise, leading to lipotoxicity at the cellular level. This study established a cardiomyocyte lipotoxicity model using the saturated fatty acid myristate and found that increased levels of the mitochondrial protein MUL1 were associated with mitochondrial fragmentation and cardiomyocyte hypertrophy. These findings reveal a novel connection between cardiomyocytes and lipotoxic stress.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2023)
Article
Cell Biology
Hao Zhang, Meng Yan, Ting Liu, Peiling Wei, Nannan Chai, Lingxu Li, Junying Wang, Xue Yu, Yan Lin, Bintao Qiu, Yajun Zhao
Summary: The study found that treatment with polyamines can prevent heart dysfunction, improve mitochondrial function, and reduce cell apoptosis in aged rats. Analysis of the mitochondrial proteome identified candidate proteins associated with anti-aging effects in the heart. Experimental results also demonstrated that polyamines can retard cardiomyocyte aging by regulating the expression of PDK4.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2022)
Review
Biochemistry & Molecular Biology
Giampaolo Morciano, Caterina Boncompagni, Daniela Ramaccini, Gaia Pedriali, Esmaa Bouhamida, Elena Tremoli, Carlotta Giorgi, Paolo Pinton
Summary: The most common alterations affecting mitochondria in cardiac pathological conditions include impairments of the electron transport chain activity, leading to a decrease in energy formation and ATP generation, as well as increased ROS generation and inflammation. These alterations contribute to the impairment of cardiac electrical characteristics, loss of myocyte contractility, and cardiomyocyte damage. The dysregulation of mitochondrial dynamics, which plays a role in maintaining mitochondrial fitness, is also observed in cardiac diseases. However, the translation and therapeutic applications of this knowledge are still in the early stages.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Cell Biology
Nasab Ghazal, Jessica N. Peoples, Tahmina A. Mohiuddin, Jennifer Q. Kwong
Summary: Contrary to previous beliefs, the adult heart shows remarkable resilience to acute insults to mtDNA regulation, maintaining mitochondrial function and cardiac function even with decreased TFAM protein levels. This resilience is only compromised with long-term TFAM inactivation, leading to mitochondrial dysfunction and cardiomyopathy.
AMERICAN JOURNAL OF PHYSIOLOGY-CELL PHYSIOLOGY
(2021)
Review
Biology
Christina Schenkl, Estelle Heyne, Torsten Doenst, Paul Christian Schulze, Tien Dung Nguyen
Summary: Despite advances in treating cardiac disorders, heart failure (HF) continues to increase globally and poses a medical and economic burden. HF is characterized by metabolic remodeling in the mitochondria, affecting energy homeostasis, calcium handling, oxidative stress, and inflammation. This study focuses on highlighting mitochondrial metabolic alterations and their impact on the pathophysiology of HF, as well as discussing potential metabolic approaches to improve cardiac function.
Article
Biochemistry & Molecular Biology
Yuting Zheng, Andrew A. Gibb, Hongkai Xu, Siqi Liu, Bradford G. Hill
Summary: In this study, we investigated the composition and abundance of mitochondrial supercomplexes in murine cardiac mitochondria. We found that the provision of respiratory substrates and the alteration of the cardiac glucose-fatty acid cycle can influence the levels of supercomplexes. Our findings suggest that the energetic state of the heart plays a regulatory role in supercomplex assembly and stability.
Article
Medicine, Research & Experimental
W. Brian Dalton, Eric Helmenstine, Noel Walsh, Lukasz P. Gondek, Dhanashree S. Kelkar, Abigail Read, Rachael Natrajan, Eric S. Christenson, Barbara Roman, Samarjit Das, Liang Zhao, Robert D. Leone, Daniel Shinn, Taylor Groginski, Anil K. Madugundu, Arun Patil, Daniel J. Zabransky, Arielle Medford, Justin Lee, Alex J. Cole, Marc Rosen, Maya Thakar, Alexander Ambinder, Joshua Donaldson, Amy E. DeZern, Karen Cravero, David Chu, Rafael Madero-Marroquin, Akhilesh Pandey, Paula J. Hurley, Josh Lauring, Ben Ho Park
JOURNAL OF CLINICAL INVESTIGATION
(2019)
Article
Multidisciplinary Sciences
Ravi K. Anchoori, Marietta Tan, Ssu-Hsueh Tseng, Shiwen Peng, Ruey-Shyang Soong, Aliyah Algethami, Palmer Foran, Samarjit Das, Chenguang Wang, Tian-Li Wang, Hong Liang, Chien-Fu Hung, Richard B. S. Roden
Article
Multidisciplinary Sciences
Kei Akiyoshi, Gretha J. Boersma, Miranda D. Johnson, Fernanda Carrizo Velasquez, Brittany Dunkerly-Eyring, Shannon O'Brien, Atsushi Yamaguchi, Charles Steenbergen, Kellie L. K. Tamashiro, Samarjit Das
Summary: miR-181c regulates lipid biosynthesis in hepatocytes, and miR-181c/d(-/-) mice exhibited increased body fat percentage, insulin insensitivity, and elevated liver triglyceride levels after a high-fat diet.
Article
Cardiac & Cardiovascular Systems
Fernanda Carrizo Velasquez, Barbara Roman, Erick O. Hernandez-Ochoa, Michelle K. Leppo, Sharon K. Truong, Charles Steenbergen, Martin F. Schneider, Robert G. Weiss, Samarjit Das
Summary: Insulin resistance is a hallmark of heart failure, and abnormalities in skeletal muscle metabolism have been identified in HF patients. This study shows that HF upregulates miR-133b in skeletal muscle, leading to altered glucose metabolism and the development of insulin resistance.
AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY
(2023)