Jung, Hyunsu Kim, Su Yeon Canbakis Cecen, Fatma Sema Cho, Yongcheol Kwon, Seok-Kyu 2024-01-19T16:00:50Z 2024-01-19T16:00:50Z 2022-01-10 2020-12 2296-634X https://pubs.kist.re.kr/handle/201004/117672 Calcium ions (Ca2+) play critical roles in neuronal processes, such as signaling pathway activation, transcriptional regulation, and synaptic transmission initiation. Therefore, the regulation of Ca2+ homeostasis is one of the most important processes underlying the basic cellular viability and function of the neuron. Multiple components, including intracellular organelles and plasma membrane Ca2+-ATPase, are involved in neuronal Ca2+ control, and recent studies have focused on investigating the roles of mitochondria in synaptic function. Numerous mitochondrial Ca2+ regulatory proteins have been identified in the past decade, with studies demonstrating the tissue- or cell-type-specific function of each component. The mitochondrial calcium uniporter and its binding subunits are major inner mitochondrial membrane proteins contributing to mitochondrial Ca2+ uptake, whereas the mitochondrial Na+/Ca2+ exchanger (NCLX) and mitochondrial permeability transition pore (mPTP) are well-studied proteins involved in Ca2+ extrusion. The level of cytosolic Ca2+ and the resulting characteristics of synaptic vesicle release properties are controlled via mitochondrial Ca2+ uptake and release at presynaptic sites, while in dendrites, mitochondrial Ca2+ regulation affects synaptic plasticity. During brain aging and the progress of neurodegenerative disease, mitochondrial Ca2+ mishandling has been observed using various techniques, including live imaging of Ca2+ dynamics. Furthermore, Ca2+ dysregulation not only disrupts synaptic transmission but also causes neuronal cell death. Therefore, understanding the detailed pathophysiological mechanisms affecting the recently discovered mitochondrial Ca2+ regulatory machineries will help to identify novel therapeutic targets. Here, we discuss current research into mitochondrial Ca2+ regulatory machineries and how mitochondrial Ca2+ dysregulation contributes to brain aging and neurodegenerative disease. English Frontiers Media S.A. Dysfunction of Mitochondrial Ca2+ Regulatory Machineries in Brain Aging and Neurodegenerative Diseases Article 10.3389/fcell.2020.599792 1 Frontiers in Cell and Developmental Biology, v.8 Frontiers in Cell and Developmental Biology 8 N scie scopus 000603975500001 2-s2.0-85098729665 Cell Biology Developmental Biology Cell Biology Developmental Biology Review CALCIUM BUFFERING CAPACITY ENDOPLASMIC-RETICULUM PERMEABILITY TRANSITION MOLECULAR-MECHANISMS PARKINSONS-DISEASE ALZHEIMERS-DISEASE MOTOR-NEURONS HIPPOCAMPAL-NEURONS HUNTINGTONS-DISEASE ESSENTIAL COMPONENT calcium regulation aging neurodegenerative disease synaptic regulation mitochondria