Article
Cardiac & Cardiovascular Systems
Hikaru Hagiwara, Masaya Watanabe, Yoichiro Fujioka, Takahide Kadosaka, Takuya Koizumi, Taro Koya, Motoki Nakao, Rui Kamada, Taro Temma, Kazufumi Okada, Jose Antonio Moreno, Ohyun Kwon, Hisakata Sabe, Yusuke Ohba, Toshihisa Anzai
Summary: The study aimed to investigate whether enhanced Ca2+ uptake of mitochondria could compensate for an abnormal increase in the diastolic calcium concentration ([Ca2+] ;) in ventricular myocytes in heart failure (HF) to effectively mitigate ventricular arrhythmia (VA). The results demonstrated that stimulating the mitochondrial Ca2+ uniporter could reduce the abnormal [Ca2+] ; induced by HF and effectively decrease the occurrence of VA. This finding provides a novel therapeutic target for treating HF-associated VA.
Article
Cell Biology
Emily Fernandez Garcia, Usha Paudel, Michael C. Noji, Caitlyn E. Bowman, Anil K. Rustgi, Jason R. Pitarresi, Kathryn E. Wellen, Zolt Arany, Jillian S. Weissenrieder, J. Kevin Foskett
Summary: Inhibition of MCU in oncogenic cell lines leads to an energetic crisis and reduced cell proliferation unless media is supplemented with nucleosides, pyruvate or a-KG.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2023)
Article
Plant Sciences
Chenyue Yuan, Zong Wu, Cuiliu Jin, Weiwei Cao, Yaorong Dong, Jiahui Chen, Chenping Liu
Summary: This study aimed to investigate whether the Qiangxin recipe can induce glucose metabolism and inhibit cardiomyocyte apoptosis by promoting the activation of the transcription factor Kruppel like factor 5 (KLF5). The results showed that the Qiangxin recipe can improve congestive heart failure by enhancing glucose metabolism and reducing apoptosis. The KLF5-mediated signaling pathways play an important role in the treatment of congestive heart failure, and the Qiangxin recipe can be used as a novel targeted therapy.
Review
Pharmacology & Pharmacy
Chennan Wu, Zhen Zhang, Weidong Zhang, Xia Liu
Summary: Cardiovascular diseases, including heart failure, are leading causes of death globally. Despite advancements in therapies, life expectancy for heart failure remains poor. Targeting mitochondrial dysfunction, which is closely related to heart failure, may be an effective approach for treatment.
PHARMACOLOGICAL RESEARCH
(2022)
Article
Cell Biology
Travis R. Madaris, Manigandan Venkatesan, Soumya Maity, Miriam C. Stein, Neelanjan Vishnu, Mridula K. Venkateswaran, James G. Davis, Karthik Ramachandran, Sukanthathulse Uthayabalan, Cristel Allen, Ayodeji Osidele, Kristen Stanley, Nicholas P. Bigham, Terry M. Bakewell, Melanie Narkunan, Amy Le, Varsha Karanam, Kang Li, Aum Mhapankar, Luke Norton, Jean Ross, M. Imran Aslam, W. Brian Reeves, Brij B. Singh, Jeffrey Caplan, Justin J. Wilson, Peter B. Stathopulos, Joseph A. Baur, Muniswamy Madesh
Summary: In mice consuming a Western diet, genetic ablation of the mitochondrial Mg2+ channel Mrs2 prevents weight gain and promotes metabolism, leading to decreased fat accumulation in the liver and browning of white adipose. Mrs2 deficiency restrains citrate efflux from the mitochondria, making it unavailable to support de novo lipogenesis. Lowering mMg2+ promotes metabolism and dampens diet-induced obesity and metabolic syndrome.
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
Biochemistry & Molecular Biology
Emilia R. Gutierrez-Mireles, Jose Carlos Paez-Franco, Raul Rodriguez-Ruiz, Juan Manuel German-Acacio, M. Casandra Lopez-Aquino, Manuel Gutierrez-Aguilar
Summary: Plant metabolism relies on input signals for regulation, and the mitochondrial calcium uniporter (MCU) plays a crucial role in this process. Genetic deletion of AtMICU in Arabidopsis thaliana leads to alterations in mitochondrial calcium handling and ultrastructure, causing changes in carbohydrate, amino acid, and phytol metabolism. The implications of these findings are discussed.
PLANT SIGNALING & BEHAVIOR
(2023)
Article
Multidisciplinary Sciences
Macarena Rodriguez-Prados, Elena Berezhnaya, Maria Teresa Castromonte, Sergio L. Menezes-Filho, Melanie Paillard, Gyorgy Hajnoczky
Summary: Mitochondrial Ca2+ uptake is regulated by the mtCU complex, which consists of MCU, EMRE, and MICU1/2/3 subunits. MICU1 has been proposed to physically block the mtCU pore and regulate Ca2+ flux at different cytoplasmic [Ca2+]. We studied the mtCU in divalent-free conditions and found that MICU1 restricts Na+ influx, but some mtCU channels appear to lack MICU1-dependent gating in cells with high endogenous MICU1 expression. The rearrangement of mtCU and loss of MICU1 during mitoplast preparation might have affected previous studies in divalent-free conditions.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Shubhi Srivastava, Priyanka Gajwani, Jordan Jousma, Hiroe Miyamoto, Youjeong Kwon, Arundhati Jana, Peter T. Toth, Gege Yan, Sang-Ging Ong, Jalees Rehman
Summary: Chemotherapy can cause severe damage to cardiomyocytes, but it is unclear how the cells protect themselves. This study shows that cardiomyocytes initiate a protective response by moving mitochondrial enzymes to the nucleus when exposed to chemotherapy drugs. The protective effect is mediated by metabolite-induced chromatin accessibility and AMP-kinase signaling. The discovery of this adaptive mechanism provides a potential strategy to attenuate chemotherapy-induced cardiomyocyte injury.
NATURE COMMUNICATIONS
(2023)
Article
Pharmacology & Pharmacy
Aya Shiraki, Jun-ichi Oyama, Takahiko Shimizu, Takayuki Nakajima, Takashi Yokota, Koichi Node
Summary: This study found that empagliflozin can improve cardiac mitochondrial function, enhance energy metabolism, and improve the survival rate and cardiac fibrosis in HF mice. The findings provide novel mechanisms for the beneficial effects of SGLT2 inhibitors on HF.
EUROPEAN JOURNAL OF PHARMACOLOGY
(2022)
Article
Cardiac & Cardiovascular Systems
Lingfang Zhuang, Kangni Jia, Chen Chen, Zhigang Li, Jiaxin Zhao, Jian Hu, Hang Zhang, Qin Fan, Chunkai Huang, Hongyang Xie, Lin Lu, Weifeng Shen, Guang Ning, Jiqiu Wang, Ruiyan Zhang, Kang Chen, Xiaoxiang Yan
Summary: This study reveals the significant role of DYRK1B in mitochondrial bioenergetics and the progression of cardiac hypertrophy and heart failure. DYRK1B promotes impaired mitochondrial bioenergetics by directly binding with STAT3, leading to the downregulation of PGC-1 alpha. Inhibition of DYRK1B or STAT3 activity restores cardiac performance by rejuvenating mitochondrial bioenergetics. These findings may offer new therapeutic options for heart failure patients.
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
Pharmacology & Pharmacy
Ju Tang, Weixia Duan, Ping Deng, Huijuan Li, Cong Liu, Yu Duan, Min Feng, Shangcheng Xu
Summary: Cadmium exposure slows down the rapid movement of mitochondria in neurons, leading to abnormal distribution and excessive fragmentation of mitochondria, ultimately causing mitochondrial membrane potential loss and neuronal damage. Chelating overloaded cytosolic calcium is a promising strategy to prevent cadmium-induced neurotoxicity.
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
Biochemistry & Molecular Biology
Tom Kretzschmar, Jasmine M. F. Wu, P. Christian Schulze
Summary: Heart failure remains the most common cause of death in the industrialized world, and despite new therapeutic interventions, complete prevention of its development and progression is still not possible, highlighting the need for further research to understand the underlying mechanisms. This review provides a detailed overview of the contribution of impaired mitochondrial dynamics and energy homeostasis during heart failure progression.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)