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Mitochondrial health

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https://www.readbyqxmd.com/read/28094012/mammalian-mitochondria-and-aging-an-update
#1
REVIEW
Timo E S Kauppila, Johanna H K Kauppila, Nils-Göran Larsson
Mitochondria were first postulated to contribute to aging more than 40 years ago. During the following decades, multiple lines of evidence in model organisms and humans showed that impaired mitochondrial function can contribute to age-associated disease phenotypes and aging. However, in contrast to the original theory favoring oxidative damage as a cause for mtDNA mutations, there are now strong data arguing that most mammalian mtDNA mutations originate as replication errors made by the mtDNA polymerase. Currently, a substantial amount of mitochondrial research is focused on finding ways to either remove or counteract the effects of mtDNA mutations with the hope of extending the human health- and lifespan...
January 10, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28092013/sharpening-the-cutting-edge-additional-considerations-for-the-uk-debates-on-embryonic-interventions-for-mitochondrial-diseases
#2
Erica Haimes, Ken Taylor
In October 2015 the UK enacted legislation to permit the clinical use of two cutting edge germline-altering, IVF-based embryonic techniques: pronuclear transfer and maternal spindle transfer (PNT and MST). The aim is to use these techniques to prevent the maternal transmission of serious mitochondrial diseases. Major claims have been made about the quality of the debates that preceded this legislation and the significance of those debates for UK decision-making on other biotechnologies, as well as for other countries considering similar legislation...
December 2017: Life Sciences, Society and Policy
https://www.readbyqxmd.com/read/28088897/multiplex-pcr-as-a-rapid-and-sensitive-method-for-identification-of-meat-species-in-halal-meat-products
#3
Mahsa Alikord, Javad Keramat, Mahdi Kadivar, Hassan Momtaz, Mohammad Naghi Eshtiaghi, Aziz Homayouni Rad
BACKGROUND: Species identification and authentication in meat products are important subjects for ensuring the health of consumers. The multiplex-PCR amplification and species-specific primer set were used for identification of horse, donkey, pig and other ruminants in raw and processed meat products. METHODS: Oligonucleotid primers were designed for amplification of species-specific mitochondrial DNA sequences of each species and samples were prepared from binary meat mixtures...
January 13, 2017: Recent Patents on Food, Nutrition & Agriculture
https://www.readbyqxmd.com/read/28088628/methods-needed-to-measure-predictive-accuracy-a-study-of-diabetic-patients
#4
Hafiz M R Khan, Sarah Mende, Aamrin Rafiq, Kemesha Gabbidon, P Hemachandra Reddy
Diabetes is one of the leading causes of morbidity and mortality and it can result in several complications such as kidney failure, heart failure, stroke, and blindness making it a major medical and public health concern in the United States. Statistical methods are important to detect risk factors and identify the best sampling plan to determine predictive bounds for diabetic patients' data. The main objective of this paper is to identify the best fit bootstrapping sampling method and to draw the predictive bound considering diabetes patient data...
January 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28081256/inhibition-of-acetyl-coa-carboxylase-1-acc1-and-2-acc2-reduces-proliferation-and-de-novo-lipogenesis-of-egfrviii-human-glioblastoma-cells
#5
Jessica E C Jones, William P Esler, Rushi Patel, Adhiraj Lanba, Nicholas B Vera, Jeffrey A Pfefferkorn, Cecile Vernochet
Tumor cell proliferation and migration processes are regulated by multiple metabolic pathways including glycolysis and de novo lipogenesis. Since acetyl-CoA carboxylase (ACC) is at the junction of lipids synthesis and oxidative metabolic pathways, we investigated whether use of a dual ACC inhibitor would provide a potential therapy against certain lipogenic cancers. The impact of dual ACC1/ACC2 inhibition was investigated using a dual ACC1/ACC2 inhibitor as well as dual siRNA knock down on the cellular viability and metabolism of two glioblastoma multiform cancer cell lines, U87 and a more aggressive form, U87 EGFRvIII...
2017: PloS One
https://www.readbyqxmd.com/read/28080992/microevolutionary-traits-and-comparative-population-genomics-of-the-emerging-pathogenic-fungus-cryptococcus-gattii
#6
Rhys A Farrer, Kerstin Voelz, Daniel A Henk, Simon A Johnston, Matthew C Fisher, Robin C May, Christina A Cuomo
Emerging fungal pathogens cause an expanding burden of disease across the animal kingdom, including a rise in morbidity and mortality in humans. Yet, we currently have only a limited repertoire of available therapeutic interventions. A greater understanding of the mechanisms of fungal virulence and of the emergence of hypervirulence within species is therefore needed for new treatments and mitigation efforts. For example, over the past decade, an unusual lineage of Cryptococcus gattii, which was first detected on Vancouver Island, has spread to the Canadian mainland and the Pacific Northwest infecting otherwise healthy individuals...
December 5, 2016: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28078981/resilience-to-alzheimer-s-disease-the-role-of-physical-activity
#7
Pedrinolla Anna, Schena Federico, Venturelli Massimo
BACKGROUND: Although Alzheimer's disease (AD) is a neurodegenerative pathology characterized by accumulation of β-amyloid plaques and neurofibrillary tangles at cerebral level, recent studies highlighted that AD might be the result of many altered physiological processes occurring at whole-organism level. The ability to adapt to stressors by "bending" but not "breaking" can be considered as "resilience". Individuals incline to withstand such pathophysiological challenges, can be considered more resilient than those that do not...
January 11, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28078497/anti-inflammatory-effect-of-naravelia-zeylanica-dc-via-suppression-of-inflammatory-mediators-in-carrageenan-induced-abdominal-oedema-in-zebrafish-model
#8
Sanmuga Priya Ekambaram, Senthamil Selvan Perumal, Selvaranjani Pavadai
The traditional herbal medicines are receiving great importance in the health care sector, especially in Indian system of medicine, i.e, Ayurveda. The present study focused on the standardization of Naravelia zeylanica (L.) DC in terms of its active phytochemicals and to evaluate the anti-inflammatory activity of ethanol extract of N. zeylanica (ENZ). An analytical method was developed by high-performance liquid chromatography for simultaneous determination of β-sitosterol, lupeol and oleanolic acid in ENZ...
January 11, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28071871/harmonization-of-mangiferin-on-methylmercury-engendered-mitochondrial-dysfunction
#9
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/28071691/comparative-mitochondrial-genomics-toward-exploring-molecular-markers-in-the-medicinal-fungus-cordyceps-militaris
#10
Shu Zhang, Ai-Jing Hao, Yu-Xiang Zhao, Xiao-Yu Zhang, Yong-Jie Zhang
Cordyceps militaris is a fungus used for developing health food, but knowledge about its intraspecific differentiation is limited due to lack of efficient markers. Herein, we assembled the mitochondrial genomes of eight C. militaris strains and performed a comparative mitochondrial genomic analysis together with three previously reported mitochondrial genomes of the fungus. Sizes of the 11 mitochondrial genomes varied from 26.5 to 33.9 kb mainly due to variable intron contents (from two to eight introns per strain)...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28069037/health-and-genetic-ancestry-testing-time-to-bridge-the-gap
#11
Andrew Smart, Deborah A Bolnick, Richard Tutton
BACKGROUND: It is becoming increasingly difficult to keep information about genetic ancestry separate from information about health, and consumers of genetic ancestry tests are becoming more aware of the potential health risks associated with particular ancestral lineages. Because some of the proposed associations have received little attention from oversight agencies and professional genetic associations, scientific developments are currently outpacing governance regimes for consumer genetic testing...
January 9, 2017: BMC Medical Genomics
https://www.readbyqxmd.com/read/28067471/traditional-and-novel-tools-to-probe-the-mitochondrial-metabolism-in-health-and-disease
#12
REVIEW
Yanfei Zhang, José L Avalos
Mitochondrial metabolism links energy production to other essential cellular processes such as signaling, cellular differentiation, and apoptosis. In addition to producing adenosine triphosphate (ATP) as an energy source, mitochondria are responsible for the synthesis of a myriad of important metabolites and cofactors such as tetrahydrofolate, α-ketoacids, steroids, aminolevulinic acid, biotin, lipoic acid, acetyl-CoA, iron-sulfur clusters, heme, and ubiquinone. Furthermore, mitochondria and their metabolism have been implicated in aging and several human diseases, including inherited mitochondrial disorders, cardiac dysfunction, heart failure, neurodegenerative diseases, diabetes, and cancer...
January 9, 2017: Wiley Interdisciplinary Reviews. Systems Biology and Medicine
https://www.readbyqxmd.com/read/28065781/ischemic-brain-injury-new-insights-on-the-protective-role-of-melatonin
#13
REVIEW
Eva Ramos, Paloma Patiño, Russel J Reiter, Emilio Gil-Martín, José Marco-Contelles, Esther Parada, Cristobal de Los Rios, Alejandro Romero, Javier Egea
Stroke represents one of the most common causes of brain's vulnerability for many millions of people worldwide. The plethora of physiopathological events associated with brain ischemia are regulate through multiple signaling pathways leading to the activation of oxidative stress process, Ca(2+) dyshomeostasis, mitochondrial dysfunction, proinflammatory mediators, excitotoxicity and/or programmed neuronal cell death. Understanding this cascade of molecular events is mandatory in order to develop new therapeutic strategies for stroke...
January 6, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28062576/cardiolipin-regulates-mitophagy-through-the-pkc-pathway
#14
Zheni Shen, Yiran Li, Alexander N Gasparski, Hagai Abeliovich, Miriam L Greenberg
Cardiolipin (CL), the signature phospholipid of mitochondrial membranes, is important for cardiovascular health, and perturbation of CL metabolism is implicated in cardiovascular disease (CVD). While the role of CL in mitochondrial function, biogenesis, and genome stability has been studied, recent findings indicate that it is essential for functions apart from mitochondrial bioenergetics. In this study, we report that mitophagy is perturbed in CL deficient yeast cells. Mutants of autophagy/mitophagy genes ATG8, ATG18 and ATG32 synthetically interact with CL synthase mutant crd1Δ CL-deficient cells exhibited decreased GFP-tagged mitochondrial proteins inside the vacuole and decreased free GFP, consistent with decreased mitophagy...
January 5, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28059794/oxidative-stress-synaptic-dysfunction-and%C3%A2-alzheimer-s-disease
#15
Eric Tönnies, Eugenia Trushina
Alzheimer's disease (AD) is a devastating neurodegenerative disorder without a cure. Most AD cases are sporadic where age represents the greatest risk factor. Lack of understanding of the disease mechanism hinders the development of efficacious therapeutic approaches. The loss of synapses in the affected brain regions correlates best with cognitive impairment in AD patients and has been considered as the early mechanism that precedes neuronal loss. Oxidative stress has been recognized as a contributing factor in aging and in the progression of multiple neurodegenerative diseases including AD...
December 3, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28044359/mitochondria-in-complex-psychiatric-disorders-lessons-from-mouse-models-of-22q11-2-deletion-syndrome-hemizygous-deletion-of-several-mitochondrial-genes-in-the-22q11-2-genomic-region-can-lead-to-symptoms-associated-with-neuropsychiatric-disease
#16
Prakash Devaraju, Stanislav S Zakharenko
Mitochondrial ATP synthesis, calcium buffering, and trafficking affect neuronal function and survival. Several genes implicated in mitochondrial functions map within the genomic region associated with 22q11.2 deletion syndrome (22q11DS), which is a key genetic cause of neuropsychiatric diseases. Although neuropsychiatric diseases impose a serious health and economic burden, their etiology and pathogenesis remain largely unknown because of the dearth of valid animal models and the challenges in investigating the pathophysiology in neuronal circuits...
January 3, 2017: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/28040850/mitochondrial-fission-in-human-diseases
#17
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/28034363/the-screening-of-novel-inhibitors-against-leishmania-donovani-calcium-ion-channel-to-fight-leishmaniasis
#18
Mohammad Kashif, Partha Pratim Manna, Yusuf Akhter, Mohammed Alaidarous, Abdur Rub
Leishmania is an intracellular protozoan parasite which causes Leishmaniasis, a global health problem affecting millions of people throughout 89 different countries in the world. The current treatment which includes use of amphotericin B, antimonials, and others has major drawbacks due to toxicity, resistance, and extraordinary high cost. So there is an urgent need of development of new drug targets to fight against leishmaniasis. In this regard we have selected Leishmania donovani Ca2+ ion channel (Ld-CC) as potential drug target...
December 30, 2016: Infectious Disorders Drug Targets
https://www.readbyqxmd.com/read/28030582/therapeutic-targeting-of-the-mitochondria-initiates-excessive-superoxide-production-and-mitochondrial-depolarization-causing-decreased-mtdna-integrity
#19
Kaytee L Pokrzywinski, Thomas G Biel, Dmitry Kryndushkin, V Ashutosh Rao
Mitochondrial dysregulation is closely associated with excessive reactive oxygen species (ROS) production. Altered redox homeostasis has been implicated in the onset of several diseases including cancer. Mitochondrial DNA (mtDNA) and proteins are particularly sensitive to ROS as they are in close proximity to the respiratory chain (RC). Mitoquinone (MitoQ), a mitochondria-targeted redox agent, selectively damages breast cancer cells possibly through damage induced via enhanced ROS production. However, the effects of MitoQ and other triphenylphosphonium (TPP+) conjugated agents on cancer mitochondrial homeostasis remain unknown...
2016: PloS One
https://www.readbyqxmd.com/read/28028686/biomarkers-of-chondriome-topology-and-function-implications-for-the-extension-of-healthy-aging
#20
David W Hollar
Multiple theories of aging (e.g., free radical, error catastrophe, mitochondrial) are complementary but fail to provide adequate models that comprehensively predict lifelong aging processes and that are valid across species. Hayflick (PLoS Genet 3(12):2351-2354, 2007) described six universal characteristics of aging that focus upon post-reproductive molecular entropy. Here we present a thermodynamic potential model of aging in which the energetic and topological properties of the mitochondrion drive functional and structural stabilities within living systems...
December 27, 2016: Biogerontology
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