author_facet Aras, Siddhesh
Purandare, Neeraja
Gladyck, Stephanie
Somayajulu-Nitu, Mallika
Zhang, Kezhong
Wallace, Douglas C.
Grossman, Lawrence I.
Aras, Siddhesh
Purandare, Neeraja
Gladyck, Stephanie
Somayajulu-Nitu, Mallika
Zhang, Kezhong
Wallace, Douglas C.
Grossman, Lawrence I.
author Aras, Siddhesh
Purandare, Neeraja
Gladyck, Stephanie
Somayajulu-Nitu, Mallika
Zhang, Kezhong
Wallace, Douglas C.
Grossman, Lawrence I.
spellingShingle Aras, Siddhesh
Purandare, Neeraja
Gladyck, Stephanie
Somayajulu-Nitu, Mallika
Zhang, Kezhong
Wallace, Douglas C.
Grossman, Lawrence I.
Proceedings of the National Academy of Sciences
Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
Multidisciplinary
author_sort aras, siddhesh
spelling Aras, Siddhesh Purandare, Neeraja Gladyck, Stephanie Somayajulu-Nitu, Mallika Zhang, Kezhong Wallace, Douglas C. Grossman, Lawrence I. 0027-8424 1091-6490 Proceedings of the National Academy of Sciences Multidisciplinary http://dx.doi.org/10.1073/pnas.2005877117 <jats:title>Significance</jats:title> <jats:p> Pathogenic mtDNA tRNA mutations, such as the 3243A&gt;G MELAS mutation, generally result in multisystem failure. In cybrids harboring ∼70% 3243G mutant mtDNA, the mitochondrial unfolded protein response (UPR <jats:sup>mt</jats:sup> ) is impaired. Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1, or CHCHD2) is a bi-organellar (mitochondrial and nuclear) protein that is reduced in ∼70% 3243G cybrid cells. Under stress conditions, MNRR1 import into mitochondria is impaired, resulting in its preferential concentration in the nucleus. Increased nuclear MNRR1 induces the UPR <jats:sup>mt</jats:sup> through regulation of the ATF5 transcription factor. Overexpression of MNRR1 in ∼70% 3243G cybrid cells induces the UPR <jats:sup>mt</jats:sup> , autophagy, and mitochondrial biogenesis and restores mitochondrial respiratory function; furthermore, the proportion of wild-type mtDNA increases. Thus, MNRR1 overexpression might be beneficial for mtDNA diseases. </jats:p> Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms Proceedings of the National Academy of Sciences
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title Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
title_unstemmed Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
title_full Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
title_fullStr Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
title_full_unstemmed Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
title_short Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
title_sort mitochondrial nuclear retrograde regulator 1 (mnrr1) rescues the cellular phenotype of melas by inducing homeostatic mechanisms
topic Multidisciplinary
url http://dx.doi.org/10.1073/pnas.2005877117
publishDate 2020
physical 32056-32065
description <jats:title>Significance</jats:title> <jats:p> Pathogenic mtDNA tRNA mutations, such as the 3243A&gt;G MELAS mutation, generally result in multisystem failure. In cybrids harboring ∼70% 3243G mutant mtDNA, the mitochondrial unfolded protein response (UPR <jats:sup>mt</jats:sup> ) is impaired. Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1, or CHCHD2) is a bi-organellar (mitochondrial and nuclear) protein that is reduced in ∼70% 3243G cybrid cells. Under stress conditions, MNRR1 import into mitochondria is impaired, resulting in its preferential concentration in the nucleus. Increased nuclear MNRR1 induces the UPR <jats:sup>mt</jats:sup> through regulation of the ATF5 transcription factor. Overexpression of MNRR1 in ∼70% 3243G cybrid cells induces the UPR <jats:sup>mt</jats:sup> , autophagy, and mitochondrial biogenesis and restores mitochondrial respiratory function; furthermore, the proportion of wild-type mtDNA increases. Thus, MNRR1 overexpression might be beneficial for mtDNA diseases. </jats:p>
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author Aras, Siddhesh, Purandare, Neeraja, Gladyck, Stephanie, Somayajulu-Nitu, Mallika, Zhang, Kezhong, Wallace, Douglas C., Grossman, Lawrence I.
author_facet Aras, Siddhesh, Purandare, Neeraja, Gladyck, Stephanie, Somayajulu-Nitu, Mallika, Zhang, Kezhong, Wallace, Douglas C., Grossman, Lawrence I., Aras, Siddhesh, Purandare, Neeraja, Gladyck, Stephanie, Somayajulu-Nitu, Mallika, Zhang, Kezhong, Wallace, Douglas C., Grossman, Lawrence I.
author_sort aras, siddhesh
container_issue 50
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container_title Proceedings of the National Academy of Sciences
container_volume 117
description <jats:title>Significance</jats:title> <jats:p> Pathogenic mtDNA tRNA mutations, such as the 3243A&gt;G MELAS mutation, generally result in multisystem failure. In cybrids harboring ∼70% 3243G mutant mtDNA, the mitochondrial unfolded protein response (UPR <jats:sup>mt</jats:sup> ) is impaired. Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1, or CHCHD2) is a bi-organellar (mitochondrial and nuclear) protein that is reduced in ∼70% 3243G cybrid cells. Under stress conditions, MNRR1 import into mitochondria is impaired, resulting in its preferential concentration in the nucleus. Increased nuclear MNRR1 induces the UPR <jats:sup>mt</jats:sup> through regulation of the ATF5 transcription factor. Overexpression of MNRR1 in ∼70% 3243G cybrid cells induces the UPR <jats:sup>mt</jats:sup> , autophagy, and mitochondrial biogenesis and restores mitochondrial respiratory function; furthermore, the proportion of wild-type mtDNA increases. Thus, MNRR1 overexpression might be beneficial for mtDNA diseases. </jats:p>
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imprint_str_mv Proceedings of the National Academy of Sciences, 2020
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spelling Aras, Siddhesh Purandare, Neeraja Gladyck, Stephanie Somayajulu-Nitu, Mallika Zhang, Kezhong Wallace, Douglas C. Grossman, Lawrence I. 0027-8424 1091-6490 Proceedings of the National Academy of Sciences Multidisciplinary http://dx.doi.org/10.1073/pnas.2005877117 <jats:title>Significance</jats:title> <jats:p> Pathogenic mtDNA tRNA mutations, such as the 3243A&gt;G MELAS mutation, generally result in multisystem failure. In cybrids harboring ∼70% 3243G mutant mtDNA, the mitochondrial unfolded protein response (UPR <jats:sup>mt</jats:sup> ) is impaired. Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1, or CHCHD2) is a bi-organellar (mitochondrial and nuclear) protein that is reduced in ∼70% 3243G cybrid cells. Under stress conditions, MNRR1 import into mitochondria is impaired, resulting in its preferential concentration in the nucleus. Increased nuclear MNRR1 induces the UPR <jats:sup>mt</jats:sup> through regulation of the ATF5 transcription factor. Overexpression of MNRR1 in ∼70% 3243G cybrid cells induces the UPR <jats:sup>mt</jats:sup> , autophagy, and mitochondrial biogenesis and restores mitochondrial respiratory function; furthermore, the proportion of wild-type mtDNA increases. Thus, MNRR1 overexpression might be beneficial for mtDNA diseases. </jats:p> Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms Proceedings of the National Academy of Sciences
spellingShingle Aras, Siddhesh, Purandare, Neeraja, Gladyck, Stephanie, Somayajulu-Nitu, Mallika, Zhang, Kezhong, Wallace, Douglas C., Grossman, Lawrence I., Proceedings of the National Academy of Sciences, Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms, Multidisciplinary
title Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
title_full Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
title_fullStr Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
title_full_unstemmed Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
title_short Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
title_sort mitochondrial nuclear retrograde regulator 1 (mnrr1) rescues the cellular phenotype of melas by inducing homeostatic mechanisms
title_unstemmed Mitochondrial Nuclear Retrograde Regulator 1 (MNRR1) rescues the cellular phenotype of MELAS by inducing homeostatic mechanisms
topic Multidisciplinary
url http://dx.doi.org/10.1073/pnas.2005877117