keyword
MENU ▼
Read by QxMD icon Read
search

Mitochondrial fission

keyword
https://www.readbyqxmd.com/read/28098754/drp1-dependent-mitochondrial-fission-plays-critical-roles-in-physiological-and-pathological-progresses-in-mammals
#1
REVIEW
Chenxia Hu, Yong Huang, Lanjuan Li
Current research has demonstrated that mitochondrial morphology, distribution, and function are maintained by the balanced regulation of mitochondrial fission and fusion, and perturbation of the homeostasis between these processes has been related to cell or organ dysfunction and abnormal mitochondrial redistribution. Abnormal mitochondrial fusion induces the fragmentation of mitochondria from a tubular morphology into pieces; in contrast, perturbed mitochondrial fission results in the fusion of adjacent mitochondria...
January 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28096973/a-fission-yeast-cell-based-system-for-multidrug-resistant-hiv-1-proteases
#2
Zsigmond Benko, Dong Liang, Ge Li, Robert T Elder, Anindya Sarkar, Jun Takayama, Arun K Ghosh, Richard Y Zhao
BACKGROUND: HIV-1 protease (PR) is an essential enzyme for viral production. Thus, PR inhibitors (PIs) are the most effective class of anti-HIV drugs. However, the main challenge to the successful use of PI drugs in patient treatment is the emergence of multidrug resistant PRs (mdrPRs). This study aimed to develop a fission yeast cell-based system for rapid testing of new PIs that combat mdrPRs. RESULTS: Three mdrPRs were isolated from HIV-infected patients that carried seven (M7PR), ten (M10PR) and eleven (M11PR) PR gene mutations, respectively...
2017: Cell & Bioscience
https://www.readbyqxmd.com/read/28093891/multifaceted-effects-of-antimetabolite-and-anticancer-drug-2-deoxyglucose-on-eukaryotic-cancer-models-budding-and-fission-yeast
#3
REVIEW
Akshay Vishwanatha, Cletus Joseph Michael D'Souza
Glycolytic inhibitors are of interest therapeutically as they are effective against cancers that display increased glycolytic rate and mitochondrial defects. 2-Deoxyglucose (2-DG) is one such glycolytic inhibitor and was identified to be a competitive inhibitor of glucose. Studies from past few decades have shown that the mechanism of action of 2-DG is complex involving several metabolic and signaling pathways. Budding yeast Saccharomyces cerevisiae and fission yeast Schizosaccharomyces pombe are two important models for studying metabolism, cell cycle and cell signaling...
January 17, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28087886/d-chiro-inositol-ameliorates-endothelial-dysfunction-via-inhibition-of-oxidative-stress-and-mitochondrial-fission
#4
Bobo Zhang, Xudan Guo, Yunlong Li, Qiang Peng, Jinfeng Gao, Baolin Liu, Min Wang
SCOPE: D-chiro inositol (DCI), an isomer of inositol, possesses anti-oxidative and endothelial protective properties. The mechanism by which DCI prevents endothelial dysfunction was investigated, with emphasis on oxidative stress. METHODS AND RESULTS: DCI was found to inhibit NOX4 induction and enhance Nrf2 activity in palmitate (PA)-stimulated cells, showing that DCI prevents oxidative stress. DCI suppressed Ser616 phosphorylation and increased Ser637 phosphorylation of Drp1 and inhibited PA-induced mitochondrial fission...
January 14, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28077713/reversible-disruption-of-neuronal-mitochondria-by-ischemic-and-traumatic-injury-revealed-by-quantitative-two-photon-imaging-in-the-neocortex-of-anesthetized-mice
#5
Mikhail Kislin, Jeremy Sword, Ioulia V Fomitcheva, Deborah Croom, Evgeny Pryazhnikov, Eero Lihavainen, Dmytro Toptunov, Heikki Rauvala, Andre S Ribeiro, Leonard Khiroug, Sergei A Kirov
: Mitochondria play a variety of functional roles in cortical neurons, from metabolic support and neuroprotection to the release of cytokines that trigger apoptosis. In dendrites, mitochondrial structure is closely linked to their function, and fragmentation (fission) of the normally elongated mitochondria indicates loss of their function under pathological conditions, such as stroke and brain trauma. Using in vivo two-photon microscopy in mouse brain, we quantified mitochondrial fragmentation in a full spectrum of cortical injuries, ranging from severe to mild...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28075229/altered-mitochondrial-dynamics-as-a-consequence-of-venezuelan-equine-encephalitis-virus-infection
#6
Forrest Keck, Taryn Brooks-Faulconer, Tyler Lark, Pavitra Ravishankar, Charles Bailey, Carolina Salvador-Morales, Aarthi Narayanan
Mitochondria are sentinel organelles that are impacted by various forms of cellular stress, including viral infections. While signaling events associated with mitochondria, including those activated by pathogen associated molecular patterns (PAMPs), are widely studied, alterations in mitochondrial distribution and changes in mitochondrial dynamics are also beginning to be associated with cellular insult. Cells of neuronal origin have been demonstrated to display remarkable alterations in several instances, including neurodegenerative disorders...
January 11, 2017: Virulence
https://www.readbyqxmd.com/read/28071871/harmonization-of-mangiferin-on-methylmercury-engendered-mitochondrial-dysfunction
#7
Shubhankar Das, Ajanta Paul, Kamalesh D Mumbrekar, Satish B S Rao
Mangiferin (MGN), a C-glucosylxanthone abundantly found in mango plants, was studied for its potential to ameliorate methylmercury (MeHg) induced mitochondrial damage in HepG2 (human hepatocarcinoma) cell line. Cell viability experiments performed using 3-[4,5-dimethylthiazol-2-yl]-2,5- diphenyltetrazolium bromide (MTT) showed protective property of MGN in annulling MeHg-induced cytotoxicity. Conditioning the cells with optimal dose of MGN (50 µM) lowered MeHg-induced oxidative stress, calcium influx/efflux, depletion of mitochondrial trans-membrane potential and prevented mitochondrial fission as observed by decrease in Mitotracker red fluorescence, expression of pDRP1 (serine 616), and DRP1 levels...
February 2017: Environmental Toxicology
https://www.readbyqxmd.com/read/28063983/loss-of-laforin-or-malin-results-in-increased-drp1-level-and-concomitant-mitochondrial-fragmentation-in-lafora-disease-mouse-models
#8
Mamta Upadhyay, Saloni Agarwal, Pratibha Bhadauriya, Subramaniam Ganesh
Lafora disease (LD) is an autosomal recessive form of a fatal disorder characterized by the myoclonus epilepsy, ataxia, psychosis, dementia, and dysarthria. A hallmark of LD is the presence of abnormal glycogen inclusions called Lafora bodies in the affected tissues including the neurons. LD can be caused by defects either in the laforin phosphatase coded by the EPM2A gene or in the malin E3 ubiquitin ligase coded by the NHLRC1 gene. The mouse models of LD, created by the targeted disruption of the LD genes, display several neurodegenerative changes...
January 4, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28062662/disease-causing-mutations-affecting-surface-residues-of-mitochondrial-glutaryl-coa-dehydrogenase-impair-stability-heteromeric-complex-formation-and-mitochondria-architecture
#9
Jessica Schmiesing, Benjamin Lohmöller, Michaela Schweizer, Henning Tidow, Søren W Gersting, Ania C Muntau, Thomas Braulke, Chris Mühlhausen
The neurometabolic disorder glutaric aciduria type 1 (GA1) is caused by mutations in the GCDH gene encoding the mitochondrial matrix protein glutaryl-CoA dehydrogenase (GCDH), which forms homo- and heteromeric complexes. Twenty percent of all pathogenic mutations affect single amino acid residues on the surface of GCDH resulting in a severe clinical phenotype. We report here on heterologous expression studies of 18 missense mutations identified in GA1 patients affecting surface amino acids. Western blot and pulse chase experiments revealed that the stability of half of the GCDH mutants was significantly reduced...
January 5, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28060865/agent-based-modeling-of-mitochondria-links-sub-cellular-dynamics-to-cellular-homeostasis-and-heterogeneity
#10
Giovanni Dalmasso, Paula Andrea Marin Zapata, Nathan Ryan Brady, Anne Hamacher-Brady
Mitochondria are semi-autonomous organelles that supply energy for cellular biochemistry through oxidative phosphorylation. Within a cell, hundreds of mobile mitochondria undergo fusion and fission events to form a dynamic network. These morphological and mobility dynamics are essential for maintaining mitochondrial functional homeostasis, and alterations both impact and reflect cellular stress states. Mitochondrial homeostasis is further dependent on production (biogenesis) and the removal of damaged mitochondria by selective autophagy (mitophagy)...
2017: PloS One
https://www.readbyqxmd.com/read/28060722/polyphyllin-i-induces-mitophagic-and-apoptotic-cell-death-in-human-breast-cancer-cells-by-increasing-mitochondrial-pink1-levels
#11
Guo-Bing Li, Ruo-Qiu Fu, Han-Ming Shen, Jing Zhou, Xiao-Ye Hu, Yan-Xia Liu, Yu-Nong Li, Hong-Wei Zhang, Xin Liu, Yan-Hao Zhang, Cheng Huang, Rong Zhang, Ning Gao
The molecular mechanisms underlying the anti-breast cancer effects of polyphyllin I, a natural compound extracted from Paris polyphylla rhizomes, are not fully understood. In the present study, we found that polyphyllin I induces mitochondrial translocation of DRP1 by dephosphorylating DRP1 at Ser637, leading to mitochondrial fission, cytochrome c release from mitochondria into the cytosol and, ultimately apoptosis. Polyphyllin I also increased the stabilization of full-length PINK1 at the mitochondrial surface, leading to the recruitment of PARK2, P62, ubiquitin, and LC3B-II to mitochondria and culminating in mitophagy...
January 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28055012/aif-independent-parthanatos-in-the-pathogenesis-of-dry-age-related-macular-degeneration
#12
Ki-Hong Jang, Yun-Ju Do, Dongwon Son, Eunji Son, Jun-Sub Choi, Eunhee Kim
Cell death of retinal pigment epithelium (RPE) is characterized as an essential late-stage phenomenon of dry age-related macular degeneration (AMD). The aim of this study was to elucidate the molecular mechanism underlying RPE cell death after exposure to oxidative stress, which occurs often because of the anatomical location of RPE cells. ARPE-19, an established RPE cell line, exhibited necrotic features involving poly (ADP-ribose) polymerase-1 (PARP-1) activation in response to hydrogen peroxide (H2O2). ARPE-19 cells were resistant to H2O2 when PARP-1 was depleted using siRNA or inhibited by a pharmacological inhibitor of PARP-1, olaparib...
January 5, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28053612/ischemic-brain-injury-decreases-dynamin-like-protein-1-expression-in-a-middle-cerebral-artery-occlusion-animal-model-and-glutamate-exposed-ht22-cells
#13
Ah-Ram Jang, Phil-Ok Koh
Dynamin-like protein I (DLP-1) is an important mitochondrial fission and fusion protein that is associated with apoptotic cell death in neurodegenerative diseases. In this study, we investigated DLP-1 expression in a focal cerebral ischemia animal model and glutamate-exposed hippocampal-derived cell line. Middle cerebral artery occlusion (MCAO) was surgically induced in adult male rats to induce focal cerebral ischemic injury. Brain tissues were collected 24 hours after the onset of MCAO. MCAO induces an increase in infarct volume and histopathological changes in the cerebral cortex...
December 2016: Laboratory Animal Research
https://www.readbyqxmd.com/read/28049718/patterns-of-organelle-ontogeny-through-a-cell-cycle-revealed-by-whole-cell-reconstructions-using-3d-electron-microscopy
#14
Louise Hughes, Samantha Borrett, Katie Towers, Tobias Starborg, Sue Vaughan
The major mammalian bloodstream form of the African sleeping sickness parasite Trypanosoma brucei multiplies rapidly and it is important to understand how these cells divide. Organelle inheritance involves complex spatiotemporal re-arrangements to ensure correct distribution to daughter cells. Serial block face scanning electron microscopy (SBF-SEM) was used to reconstruct whole individual cells at different stages of the cell cycle to give an unprecedented temporal, spatial and quantitative view of organelle division, inheritance and abscission in a eukaryotic cell...
January 3, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28040850/mitochondrial-fission-in-human-diseases
#15
Madhavika N Serasinghe, Jerry E Chipuk
Mitochondria are an essential component of multicellular life - from primitive organisms, to highly complex entities like mammals. The importance of mitochondria is underlined by their plethora of well-characterized essential functions such as energy production through oxidative phosphorylation (OX-PHOS), calcium and reactive oxygen species (ROS) signaling, and regulation of apoptosis. In addition, novel roles and attributes of mitochondria are coming into focus through the recent years of mitochondrial research...
January 1, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28040727/a-conserved-retromer-sorting-motif-is-essential-for-mitochondrial-dlp1-recycling-by-vps35-in-parkinson-s-disease-model
#16
Wenzhang Wang, Xiaopin Ma, Leping Zhou, Jun Liu, Xiongwei Zhu
Impaired mitochondria dynamics and quality control are involved in mitochondrial dysfunction and pathogenesis of Parkinson's disease (PD). VPS35 mutations cause autosomal dominant PD and we recently demonstrated that fPD-associated VPS35 mutants can cause mitochondrial fragmentation through enhanced VPS35-DLP1 interaction. In this study, we focused on the specific sites on DLP1 responsible for the VPS35-DLP1 interaction. A highly conserved FLV motif was identified in the C-terminus of DLP1, mutation of which significantly reduced VPS35-DLP1 interaction...
December 30, 2016: Human Molecular Genetics
https://www.readbyqxmd.com/read/28039408/nrf2-deficiency-does-not-affect-denervation-induced-alterations-in-mitochondrial-fission-and-fusion-proteins-in-skeletal-muscle
#17
Yu Kitaoka, Kohei Takeda, Yuki Tamura, Shin Fujimaki, Tohru Takemasa, Hideo Hatta
Oxidative stress-induced mitochondrial dysfunction is associated with age-related and disuse-induced skeletal muscle atrophy. However, the role of nuclear factor erythroid 2-related factor 2 (Nrf2) during muscle fiber atrophy remains to be elucidated. In this study, we examined whether deficiency of Nrf2, a master regulator of antioxidant transcription, promotes denervation-induced mitochondrial fragmentation and muscle atrophy. We found that the expression of Nrf2 and its target antioxidant genes was upregulated at 2 weeks after denervation in wild-type (WT) mice...
December 2016: Physiological Reports
https://www.readbyqxmd.com/read/28035046/the-pleckstrin-homology-domain-of-dynamin-is-dispensable-for-membrane-constriction-and-fission
#18
Srishti Dar, Thomas J Pucadyil
Classical dynamins bind the plasma membrane-localized phosphatidylinositol-4,5-bisphosphate using the pleckstrin-homology domain (PHD) and engage in rapid membrane fission during synaptic vesicle recycling. This domain is conspicuously absent among extant bacterial and mitochondrial dynamins, however, where loop regions manage membrane recruitment. Inspired by the core design of bacterial and mitochondrial dynamins, we reengineered the classical dynamin by replacing its PHD with a polyhistidine or polylysine linker...
January 1, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28031252/compound-heterozygosity-for-severe-and-hypomorphic-ndufs2-mutations-cause-non-syndromic-lhon-like-optic-neuropathy
#19
Sylvie Gerber, Martina G Ding, Xavier Gérard, Klaus Zwicker, Xavier Zanlonghi, Marlène Rio, Valérie Serre, Sylvain Hanein, Arnold Munnich, Agnès Rotig, Lucas Bianchi, Patrizia Amati-Bonneau, Orly Elpeleg, Josseline Kaplan, Ulrich Brandt, Jean-Michel Rozet
BACKGROUND: Non-syndromic hereditary optic neuropathy (HON) has been ascribed to mutations in mitochondrial fusion/fission dynamics genes, nuclear and mitochondrial DNA-encoded respiratory enzyme genes or nuclear genes of poorly known mitochondrial function. However, the disease causing gene remains unknown in many families. The objective of the present study was to identify the molecular cause of non-syndromic LHON-like disease in siblings born to non-consanguineous parents of French origin...
December 28, 2016: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28027494/ultrastructural-evidence-for-impaired-mitochondrial-fission-in-the-aged-rhesus-monkey-dorsolateral-prefrontal-cortex
#20
Yury M Morozov, Dibyadeep Datta, Constantinos D Paspalas, Amy F T Arnsten
Dorsolateral prefrontal cortex mediates high-order cognitive functions that are impaired early in the aging process in monkeys and humans. Here, we report pronounced changes in mitochondrial morphology in dendrites of dorsolateral prefrontal cortex neurons from aged rhesus macaques. Electron microscopy paired with 3D reconstruction from serial sections revealed an age-related increase in mitochondria with thin segments that intermingled with enlarged ones, the 'mitochondria-on-a-string' phenotype, similar to those recently reported in patients with Alzheimer's disease...
December 10, 2016: Neurobiology of Aging
keyword
keyword
102378
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"