keyword
MENU ▼
Read by QxMD icon Read
search

Mitochondrial

keyword
https://www.readbyqxmd.com/read/29055110/host-conservatism-geography-and-elevation-in-the-evolution-of-a-neotropical-moth-radiation
#1
Joshua P Jahner, Matthew L Forister, Thomas L Parchman, Angela M Smilanich, James S Miller, Joseph S Wilson, Thomas R Walla, Eric J Tepe, Lora A Richards, Mario Alberto Quijano-Abril, Andrea E Glassmire, Lee A Dyer
The origins of evolutionary radiations are often traced to the colonization of novel adaptive zones, including unoccupied habitats or unutilized resources. For herbivorous insects, the predominant mechanism of diversification is typically assumed to be a shift onto a novel lineage of host plants. However, other drivers of diversification are important in shaping evolutionary history, especially for groups residing in regions with complex geological histories. We evaluated the contributions of shifts in host plant clade, bioregion, and elevation to diversification in Eois (Lepidoptera: Geometridae), a hyper-diverse genus of moths found throughout the Neotropics...
October 21, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/29055103/mitochondrial-ca-2-dynamics-in-cells-and-suspensions
#2
Benjamin Wacquier, Hugo E Romero C, Virginia González-Vélez, Laurent Combettes, Geneviève Dupont
Mitochondria play a significant role in shaping cytosolic Ca(2+) signals. Thus, Ca(2+) transfers across the mitochondrial membrane are much studied, not only in intact cells but also in artificial systems such as mitochondrial suspensions or permeabilised cells. Observed rates of Ca(2+) changes vary by at least one order of magnitude. In this work, we investigate the relationship between the Ca(2+) dynamics observed in various experimental conditions using a computational model calibrated on experimental data...
October 21, 2017: FEBS Journal
https://www.readbyqxmd.com/read/29055022/the-addition-of-a-developmental-factor-unc-62-to-already-long-lived-worms-increases-lifespan-and-healthspan
#3
Dror Sagi
Aging is a complex trait that is affected by multiple genetic pathways. A relatively unexplored approach is to manipulate multiple independent aging pathways simultaneously in order to observe their cumulative effect on lifespan. Here, we report the phenotypic characterization of a strain with changes in five aging pathways: 1) mitochondrial ROS production, 2) innate immunity, 3) stress response, 4) metabolic control and 5) developmental regulation in old age. The quintuply-modified strain has a lifespan that is 160% longer than the transgenic control strain...
October 20, 2017: Biology Open
https://www.readbyqxmd.com/read/29055012/type-i-interferon-enhances-necroptosis-of-salmonella-typhimurium-infected-macrophages-by-impairing-antioxidative-stress-responses
#4
Nina Judith Hos, Raja Ganesan, Saray Gutiérrez, Deniz Hos, Jennifer Klimek, Zeinab Abdullah, Martin Krönke, Nirmal Robinson
Salmonella enterica serovar Typhimurium exploits the host's type I interferon (IFN-I) response to induce receptor-interacting protein (RIP) kinase-mediated necroptosis in macrophages. However, the events that drive necroptosis execution downstream of IFN-I and RIP signaling remain elusive. In this study, we demonstrate that S Typhimurium infection causes IFN-I-mediated up-regulation of the mitochondrial phosphatase Pgam5 through RIP3. Pgam5 subsequently interacts with Nrf2, which sequesters Nrf2 in the cytosol, thereby repressing the transcription of Nrf2-dependent antioxidative genes...
October 20, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/29054984/overcoming-resistance-to-cetuximab-with-honokiol-a-small-molecule-polyphenol
#5
Hannah E Pearson, Mari Iida, Rachel A Orbuch, Nellie K McDaniel, Kwangok P Nickel, Randall J Kimple, Jack Arbiser, Deric L Wheeler
Overexpression and activation of the Epidermal Growth Factor Receptor (EGFR) have been linked to poor prognosis in several human cancers. Cetuximab is a monoclonal antibody against EGFR, that is used for the treatment in head and neck squamous cell carcinoma (HNSCC) and metastatic colorectal cancer. Unfortunately, most tumors have intrinsic or acquire resistance to cetuximab during the course of therapy. Honokiol is a natural compound found in the bark and leaves of the Chinese Magnolia tree and is established to have several anti-cancer properties without appreciable toxicity...
October 20, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/29054925/platelet-mitochondrial-dysfunction-and-the-correlation-with-human-diseases
#6
REVIEW
Li Wang, Qiang Wu, Zhijia Fan, Rufeng Xie, Zhicheng Wang, Yuan Lu
The platelet is considered as an accessible and valuable tool to study mitochondrial function, owing to its greater content of fully functional mitochondria compared with other metabolically active organelles. Different lines of studies have demonstrated that mitochondria in platelets have function far more than thrombogenesis regulation, and beyond hemostasis, platelet mitochondrial dysfunction has also been used for studying mitochondrial-related diseases. In this review, the interplay between platelet mitochondrial dysfunction and oxidative stress, mitochondrial DNA lesions, electron transfer chain impairments, mitochondrial apoptosis and mitophagy has been outlined...
October 20, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/29054807/ontogeny-of-skeletal-and-cardiac-muscle-mitochondria-oxygen-fluxes-in-two-breeds-of-chicken
#7
Sarah K G Sirsat, Edward M Dzialowski
From its earliest days of domestication, the domestic chicken (Gallus gallus domesticus) has been selectively bred for specific traits. Decades of genetic selection have resulted in significant dissimilarities in metabolism and growth between breeds, in particular fast-growing broilers and highly productive layers. A chicken develops the capacity to elevate metabolism in response to decreases in ambient temperature upon hatching, including well-developed methods of regulating thermogenesis. However, a differential timing between incipient endothermic capacities of broiler and layer strains exists...
October 17, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/29054798/the-antimicrobial-peptide-nisin-z-induces-selective-toxicity-and-apoptotic-cell-death-in-cultured-melanoma-cells
#8
Angélique Lewies, Johannes Frederik Wentzel, Hayley van Dyk, Lissinda Hester Du Plessis
Reprogramming of cellular metabolism is now considered one of the hallmarks of cancer. Most malignant cells Reprogramming of cellular metabolism is now considered one of the hallmarks of cancer. Most malignant cells present with altered energy metabolism which is associated with elevated reactive oxygen species (ROS) generation. This is also evident for melanoma, the leading cause of skin cancer related deaths. Altered mechanisms affecting mitochondrial bioenergetics pose attractive targets for novel anti-cancer therapies...
October 17, 2017: Biochimie
https://www.readbyqxmd.com/read/29054730/the-translocator-protein-18kda-and-its-role-in-neuropsychiatric-disorders
#9
REVIEW
Tatiana Barichello, Lutiana R Simões, Allan Collodel, Vijayasree V Giridharan, Felipe Dal-Pizzol, Danielle Macedo, Joao Quevedo
Translocator protein (TSPO) is an 18kDa translocator membrane protein expressed in the outer mitochondrial membrane of steroid-synthesizing cells in the central and peripheral nervous systems. TSPO is involved in cellular functions, including the regulation of cell proliferation, transport of cholesterol to the inner mitochondrial membranes of glial cells, regulation of mitochondrial quality control, and haem synthesis. In the brain, TSPO has been extensively used as a biomarker of injury and inflammation. Indeed, TSPO was up-regulated in several inflammatory and neurodegenerative diseases...
October 17, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/29054538/lower-mitochondrial-dysfunction-in-survivor-septic-patients-with-mitochondrial-dna-haplogroup-jt
#10
Leonardo Lorente, María M Martín, Ester López-Gallardo, José Ferreres, Jordi Solé-Violán, Lorenzo Labarta, César Díaz, Alejandro Jiménez, Julio Montoya, Eduardo Ruiz-Pesini
OBJECTIVE: The comparison on mitochondrial function between severe septic patients and healthy control subjects according to mitochondrial deoxyribonucleic acid (mtDNA) haplogroup has not been previously reported; and this was the objective of the current study. METHODS: Prospective, multicenter, observational study. We obtained blood samples from 198 severe septic patients at days 1, 4 and 8 of severe sepsis diagnosis and from 96 sex- and age-matched healthy controls to determine mtDNA haplogroup and platelet respiratory complex IV (CIV) specific activity...
October 17, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/29054537/calcium-signaling-at-the-endoplasmic-reticulum-fine-tuning-stress-responses
#11
REVIEW
Amado Carreras-Sureda, Philippe Pihán, Claudio Hetz
Endoplasmic reticulum (ER) calcium signaling is implicated in a myriad of coordinated cellular processes. The ER calcium content is tightly regulated as it allows a favorable environment for protein folding, in addition to operate as a major reservoir for fast and specific release of calcium. Altered ER homeostasis impacts protein folding, activating the unfolded protein response (UPR) as a rescue mechanism to restore proteostasis. ER calcium release impacts mitochondrial metabolism and also fine-tunes the threshold to undergo apoptosis under chronic stress...
August 20, 2017: Cell Calcium
https://www.readbyqxmd.com/read/29054530/a-molecular-morphometric-approach-to-diabetic%C3%A2-kidney-disease-can-link-structure-to%C3%A2-function-and-outcome
#12
Viji Nair, Claudiu V Komorowsky, E Jennifer Weil, Berne Yee, Jeffrey Hodgin, Jennifer L Harder, Bradley Godfrey, Wenjun Ju, Carine M Boustany-Kari, Margrit Schwarz, Kevin V Lemley, Peter J Nelson, Robert G Nelson, Matthias Kretzler
Diabetic kidney disease is the leading cause of kidney failure. However, studies of molecular mechanisms of early kidney damage are lacking. Here we examined for possible linkage between transcriptional regulation and quantitative structural damage in early diabetic kidney disease in Pima Indians with type 2 diabetes. Tissue obtained from protocol kidney biopsies underwent genome-wide compartment-specific gene expression profiling and quantitative morphometric analysis. The ultrastructural lesion most strongly associated with transcriptional regulation was cortical interstitial fractional volume (VvInt), an index of tubule-interstitial damage...
October 18, 2017: Kidney International
https://www.readbyqxmd.com/read/29054473/mitochondrial-disorders-of-the-retinal-ganglion-cells-and-the-optic-nerve
#13
REVIEW
Josef Finsterer, Michelangelo Mancuso, Davide Pareyson, Jean-Marc Burgunder, Thomas Klopstock
OBJECTIVES: To summarise and discuss recent findings and future perspectives concerning mitochondrial disorders (MIDs) affecting the retinal ganglion cells and the optic nerve and (mitochondrial optic neuropathy. MON). METHOD: Literature review. RESULTS: MON in MIDs is more frequent than usually anticipated. MON may occur in specific as well as non-specific MIDs. In specific and non-specific MIDs, MON may be a prominent or non-prominent phenotypic feature and due to mutations in genes located either in the mitochondrial DNA (mtDNA) or the nuclear DNA (nDNA)...
October 17, 2017: Mitochondrion
https://www.readbyqxmd.com/read/29054472/the-mitochondrial-respiratory-chain-a-metabolic-rheostat-of-innate-immune-cell-mediated-antibacterial-responses
#14
REVIEW
Leif E Sander, Johan Garaude
Upon microbial infection, cells of the innate immune system undergo profound metabolic reprogramming in order to eradicate pathogens, promote inflammation, and eventually restore tissue homeostasis. Mitochondria are at the core of these adaptations, given their dual role as metabolic hubs and innate immune signaling platforms. The mitochondrial electron transport chain (ETC) is very well characterized at the genetic, molecular, structural, and biochemical level. In contrast, the role for mitochondrial ETC and metabolites beyond fulfilling cellular ATP synthesis in innate immune cell biology was not understood until recently...
October 17, 2017: Mitochondrion
https://www.readbyqxmd.com/read/29054471/innate-immunity-and-tolerance-toward-mitochondria
#15
REVIEW
Anthony Rongvaux
Mitochondria are intracellular organelles that originate from a bacterial symbiont, and they retain multiple features of this bacterial ancestry. The immune system evolved to detect the presence of invading pathogens, including bacteria, to eliminate them by a diversity of antimicrobial mechanisms and to mount long-term protective immunity. Due to their bacterial ancestry, mitochondria are sensed by the innate immune system, and trigger inflammatory responses comparable to those induced by pathogenic bacteria...
October 17, 2017: Mitochondrion
https://www.readbyqxmd.com/read/29054429/surface-chemistry-induces-mitochondria-mediated-apoptosis-of-breast-cancer-cells-via-pten-pi3k-akt-signaling-pathway
#16
Jing Zhang, Li Li, Yueting Peng, Yu Chen, Xiaoying Lv, Shun Li, Xiang Qin, Hong Yang, Chunhui Wu, Yiyao Liu
Tumor cell can be significantly influenced by various chemical groups of the extracellular matrix proteins. However, the underlying molecular mechanisms involved in the interaction between cancer cells and functional groups in the extracellular matrix remain unknown. Using chemically modified surfaces with biological functional groups (CH3, NH2, OH), it was found that hydrophobic surfaces modified with CH3 and NH2 suppressed cell proliferation and induced the number of apoptotic cells. Mitochondrial dysfunction, cytochrome c release, Bax upregulation, cleaved caspase-3 and PARP, and Bcl-2 downregulation indicated that hydrophobic surfaces with CH3 and NH2 triggered the activation of intrinsic apoptotic signaling pathway...
October 17, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29054413/a-2-bp-deletion-in-the-mitochondrial-atp-6-gene-responsible-for-the-narp-neuropathy-ataxia-and-retinitis-pigmentosa-syndrome
#17
Patrick Mordel, Stéphane Schaeffer, Quentin Dupas, Marie-Alice Laville, Marion Gérard, Françoise Chapon, S Allouche
Mitochondrial (mt) DNA-associated NARP (neurogenic muscle weakness, ataxia, and retinitis pigmentosa) syndrome is due to mutation in the MT-ATP6 gene. We report the case of a 18-year-old man who presented with deafness, a myoclonic epilepsy, muscle weakness since the age of 10 and further developed a retinitis pigmentosa and ataxia. The whole mtDNA analysis by next-generation sequencing revealed the presence of the 2 bp microdeletion m.9127-9128 del AT in the ATP6 gene at 82% heteroplasmy in muscle and to a lower load in blood (10-20%) and fibroblasts (50%)...
October 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29054408/hdac6-deficiency-induces-apoptosis-in-mesenchymal-stem-cells-through-p53-k120-acetylation
#18
Song-Yi Park, Sophors Phorl, Suna Jung, Korm Sovannarith, Se-In Lee, Solhee Noh, Miae Han, Rema Naskar, Jae-Young Kim, Yun-Jaie Choi, Joo-Yong Lee
The acetylation of p53 is critical in modulating its pro-apoptotic roles. However, its regulatory mechanism and physiological significance are unclear. Here, we show HDAC6 negatively regulates pro-apoptotic acetylation of p53 at lysine residue 120 (K120) in mesenchymal stem cells (MSCs). The loss of HDAC6 expression in MSCs increases K120 acetylation of p53, which is successfully reversed by the wild type but not by catalytically dead HDAC6. Deletion of HDAC6 induces caspase-dependent apoptosis by promoting transactivation of Bax and suppression of Bcl-2...
October 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29054283/desmin-expression-profile-in-reactive-astrocytes-in-the-3-nitropropionic-acid-lesioned-striatum-of-rat-characterization-and-comparison-with-glial-fibrillary-acidic-protein-and-nestin
#19
Jeong-Heon Choi, Tae-Ryong Riew, Hong Lim Kim, Xuyan Jin, Mun-Yong Lee
Desmin, a muscle-specific, type-III intermediate-filament protein, is reportedly expressed in astrocytes in the central nervous system. These cells become reactive astrocytes in response to brain injuries. To elucidate whether desmin is involved in this process, we examined the spatiotemporal expression profiles of desmin and their relationship with two astroglial intermediate filaments, glial fibrillary acidic protein (GFAP) and nestin, in the striatum of rats treated with the mitochondrial toxin 3-nitropropionic acid (3-NP)...
October 18, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/29054140/acetaminophen-toxicity-novel-insights-into-mechanisms-and-future-perspectives
#20
Anup Ramachandran, Hartmut Jaeschke
Acetaminophen (APAP) overdose is the most common cause of acute liver failure in the United States and decades of intense study of its pathogenesis resulted in development of the antidote Nacetylcysteine, which facilitates scavenging of the reactive metabolite and is the only treatment in clinical use. However, the narrow therapeutic window of this intervention necessitates a better understanding of the intricacies of APAP-induced liver injury for development of additional therapeutic approaches which can benefit late presenting patients...
October 20, 2017: Gene Expression
keyword
keyword
15521
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"