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https://www.readbyqxmd.com/read/28772265/microrna-214-affects-fibroblast-differentiation-of-adipose-derived-mesenchymal-stem-cells-by-targeting-mitofusin-2-during-pelvic-floor-dysfunction-in-sd-rats-with-birth-trauma
#1
Jing Wu, Jiang Li, Wei-Kang Chen, Shang Liu, Jian-He Liu, Jing-Song Zhang, Ke-Wei Fang
BACKGROUND/AIMS: This study investigated whether microRNA-214 (miR-214) targets mitofusin-2 (Mfn2) in the process of fibroblast differentiation of adipose-derived mesenchymal stem cells (ADMSCs) during pelvic floor dysfunction (PFD) in Sprague Dawley (SD) rats with birth trauma. METHODS: The ADMSCs were isolated from 4-6 week male SD rats (n = 20) and were cultured and divided into the blank, miR-214 mimic negative control (NC), miR-214 mimic, miR-214 inhibitor NC, miR-214 inhibitor, empty vector, Mfn2 over-expression and miR-214 + Mfn2 over-expression groups...
August 3, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28761019/effects-of-trimetazidine-on-mitochondrial-respiratory-function-biosynthesis-and-fission-fusion-in-rats-with-acute-myocardial-ischemia
#2
Wen Shi, Wenfeng Shangguan, Yue Zhang, Can Li, Guangping Li
OBJECTIVE: Myocardial ischemia affects mitochondrial functions, leading to ionic imbalance and susceptibility to ventricular fibrillation. Trimetazidine, a metabolic agent, is clinically used in anti-anginal therapy. METHODS: In this study, the rats were orally treated by gavage with trimetazidine 10 mg/kg/d for 7 days, and the effects of trimetazidine on mitochondrial respiratory function, biosynthesis, and fission/fusion in rats with acute myocardial ischemia were evaluated...
July 25, 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28760600/hypothalamic-mitochondrial-abnormalities-occur-downstream-of-inflammation-in-diet-induced-obesity
#3
Rodrigo S Carraro, Gabriela F Souza, Carina Solon, Daniela S Razolli, Bruno Chausse, Roberta Barbizan, Sheila C Victorio, Licio A Velloso
Hypothalamic dysfunction is a common feature of experimental obesity. Studies have identified at least three mechanisms involved in the development of hypothalamic neuronal defects in diet-induced obesity: i, inflammation; ii, endoplasmic reticulum stress; and iii, mitochondrial abnormalities. However, which of these mechanisms is activated earliest in response to the consumption of large portions of dietary fats is currently unknown. Here, we used immunoblot, real-time PCR, mitochondrial respiration assays and transmission electron microscopy to evaluate markers of inflammation, endoplasmic reticulum stress and mitochondrial abnormalities in the hypothalamus of Swiss mice fed a high-fat diet for up to seven days...
July 28, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28758339/mitofusin-1-and-optic-atrophy-1-shift-metabolism-to-mitochondrial-respiration-during-aging
#4
Jyung Mean Son, Ehab H Sarsour, Anurag Kakkerla Balaraju, Jenna Fussell, Amanda L Kalen, Brett A Wagner, Garry R Buettner, Prabhat C Goswami
Replicative and chronological lifespan are two different modes of cellular aging. Chronological lifespan is defined as the duration during which quiescent normal cells retain their capacity to re-enter the proliferative cycle. This study investigated whether changes in metabolism occur during aging of quiescent normal human fibroblasts (NHFs) and the mechanisms that regulate these changes. Bioenergetics measurements were taken in quiescent NHFs from younger (newborn, 3-day, 5-month, and 1-year) and older (58-, 61-, 63-, 68-, and 70-year) healthy donors as well as NHFs from the same individual at different ages (29, 36, and 46 years)...
July 31, 2017: Aging Cell
https://www.readbyqxmd.com/read/28748372/training-and-acute-exercise-modulates-mitochondrial-dynamics-in-football-players-blood-mononuclear-cells
#5
Carla Busquets-Cortés, Xavier Capó, Miquel Martorell, Josep A Tur, Antoni Sureda, Antoni Pons
PURPOSE: Regular physical activity induces oxidative stress but also causes adaptations in antioxidant defences including the nuclear factor κB (NF-κB) pathway, which activates target genes related to antioxidant defences such as uncoupling proteins (UCPs), and mitochondrial biogenesis mediated by peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α). The aim of the study was to determine the effect of long-term training and acute exercise on oxidant/antioxidant status and the expression of mitochondrial biogenesis genes in peripheral blood mononuclear cells (PBMCs)...
July 26, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28743390/baicalin-attenuates-in-vivo-and-in-vitro-hyperglycemia-exacerbated-ischemia-reperfusion-injury-by-regulating-mitochondrial-function-in-a-manner-dependent-on-ampk
#6
Shanshan Li, Xiaoxu Sun, Lixing Xu, Ruoxi Sun, Zhanqiang Ma, Xueyang Deng, Baolin Liu, Qiang Fu, Rong Qu, Shiping Ma
Cerebral ischemia/reperfusion (I/R) is a lethal and disabling disease. Studies have suggested that hyperglycemia is a risk factor for cerebral I/R. Baicalin is a natural bioactive flavonoid extracted from Scutellaria baicalensis Georgi with neuroprotective activity. In the present study, we investigated the effects of baicalin on hyperglycemia-exacerbated cerebral I/R injury. Streptozotocin (STZ) injection aggravated the brain damage induced by middle cerebral artery occlusion (MCAO) surgery, while baicalin administration reduced blood glucose, relieved neurological deficit and decreased infarct volume...
July 22, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28742858/reduction-of-endoplasmic-reticulum-mitochondria-interactions-in-beta-cells-from-patients-with-type-2-diabetes
#7
Charles Thivolet, Guillaume Vial, Romeo Cassel, Jennifer Rieusset, Anne-Marie Madec
Type 2 diabetes develops when beta cells are not able to fulfill insulin needs. The role of the endoplasmic reticulum-mitochondria junction in coordinating the functions of these two organelles throughout the natural history of type 2 diabetes is determinant and may explain the alterations of insulin biosynthesis. Our goal was to study endoplasmic reticulum and mitochondrial interactions in human beta cells from organ donors with type 2 diabetes. Pancreas samples were obtained via the network for pancreatic organ donors with diabetes (nPOD) based on disease status with 12 subjects with type 2 diabetes and 9 non-diabetic controls...
2017: PloS One
https://www.readbyqxmd.com/read/28729638/inhibition-of-microrna-214-promotes-epithelial-mesenchymal-transition-process-and-induces-interstitial-cystitis-in-postmenopausal-women-by-upregulating-mfn2
#8
Jian-Wei Lv, Wei Wen, Chen Jiang, Qi-Bo Fu, Yin-Jun Gu, Ting-Ting Lv, Zhen-Dong Li, Wei Xue
Our study aims to investigate the roles that microRNA-214 (miR-214) plays in the epithelial mesenchymal transition (EMT) process and the development of interstitial cystitis (IC) in postmenopausal women by targeting Mitofusin 2 (Mfn2). IC bladder tissues and adjacent normal bladder tissues were collected from postmenopausal women. Immunohistochemistry (IHC) staining was conducted. The target relationship between miR-214 and Mfn2 was determined by a dual luciferase reporter gene assay. Adipose-derived mesenchymal stem cells (ADMSCs) were extracted from postmenopausal rats and assigned to the blank, mimics, miR-214 inhibitors, mimics negative control (NC), inhibitors NC, Mfn2 siRNA, miR-214 inhibitors and Mfn2 siRNA groups...
July 21, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28729291/stimulator-of-ifn-genes-mediated-dna-sensing-pathway-is-suppressed-by-nlrp3-agonists-and-regulated-by-mitofusin-1-and-tbc1d15-mitochondria-dynamics-mediators
#9
Dohyeong Kwon, Eunbyeol Park, Suk-Jo Kang
The stimulator of IFN genes (STING)-mediated DNA-sensing pathway plays an important role in the innate immune response to pathogen infection, autoimmunity, and cancer; however, its regulatory mechanism has not been fully elucidated, and we do not yet know whether the STING pathway is counter-regulated by other innate immune pathways. Here, we show that the NLRP3-activating agonists, ATP and nigericin, prevent STING pathway activation in association with mitochondrial fragmentation; however, the suppression of the STING pathway and mitochondria fission were not dependent on NLRP3 or potassium efflux...
July 20, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28727070/short-term-heat-stress-causes-altered-intracellular-signaling-in-oxidative-skeletal-muscle
#10
S Ganesan, C M Summers, S C Pearce, N K Gabler, R J Valentine, L H Baumgard, R P Rhoads, J T Selsby
Heat stress (HS) causes morbidities and mortalities, in part by inducing organ-specific injury and dysfunction. Further, HS markedly reduces farm animal productivity, and this is especially true for lean tissue accretion. The purpose of this investigation was to determine the extent to which short-term HS caused muscle dysfunction in skeletal muscle. We have previously found increased free radical injury in skeletal muscle following 24 h of HS. Thus, we hypothesized that HS would lead to apoptosis, autophagy, and decreased mitochondrial content in skeletal muscle...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28713932/human-trypsin-inhibitor-reduces-the-apoptosis-of-lipopolysaccharide%C3%A2-induced-human-kidney%C3%A2-2-cells-by-promoting-mitochondrial-fusion
#11
Ning Liu, Zhiyi Jiang, Yongjun Liu, Yao Nie, Juan Chen, Bin Ouyang, Xiangdong Guan, Minying Chen
Imbalance in mitochondrial fusion/fission is one of the mechanisms leading to sepsis‑induced mitochondrial dysfunction and cell apoptosis. The present study examined the effects of human trypsin inhibitor (UTI), a well‑known antioxidant and anti‑inflammatory substance, on mitochondrial dynamics and cell apoptosis in lipopolysaccharide (LPS)‑induced human kidney‑2 (HK‑2) cells. The HK‑2 cells were incubated for 24 h either with LPS (800 ng/ml) or LPS (800 ng/ml) mixed with UTI (250 U/ml). Cell viability was assessed using a3‑(4,5‑dimethyl‑2‑thiazolyl)‑2, 5‑diphenyl‑2‑H‑tetrazolium bromide assay...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28705612/cardiac-mitochondrial-dynamics-mir-mediated-regulation-during-cardiac-injury
#12
Anusha Sivakumar, Ramasamy Subbiah, Rekha Balakrishnan, Jeyaprakash Rajendhran
Mitochondrial integrity is indispensable for cardiac health. With the advent of modern imaging technologies, mitochondrial motility and dynamics within the cell are extensively studied. Terminally differentiated and well-structured cardiomyocytes depict little mitochondrial division and fusion, questioning the contribution of mitochondrial fusion proteins (Mitofusin 1/2 and Optic Atrophy 1 protein) and fission factors (Dynamin-like protein 1 and mitochondrial fission 1 protein) in cardiomyocyte homeostasis...
July 10, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28684211/age-related-accumulation-of-phosphorylated-mitofusin-2-protein-in-retinal-ganglion-cells-correlates-with-glaucoma-progression
#13
Mary P Nivison, Nolan G Ericson, Virginia M Green, Jason H Bielas, Jean S Campbell, Philip J Horner
Dysregulation of axonal bioenergetics is likely a key mechanism in the initiation and progression of age-related neurodegenerative diseases. Glaucoma is a quintessential neurodegenerative disorder characterized by progressive deterioration of the optic nerve (ON) and eventual death of retinal ganglion cells (RGCs). Age and elevation of intraocular pressure are key risk factors in glaucoma, but the common early hallmarks of decreased axonal transport and increased bioenergetic vulnerability likely underlie disease initiation...
July 3, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28677814/involvement-of-mitochondrial-dynamics-in-the-antineoplastic-activity-of-cisplatin-in-murine-leukemia-l1210-cells
#14
Xiao-Jian Han, Sheng-Lan Shi, Yong-Fang Wei, Li-Ping Jiang, Miao-Yu Guo, Hong-Li Wu, Yu-Ying Wan
Leukemia is a type of hematopoietic stem cell malignant cloned disease with high mortality. Cisplatin-based chemotherapy is one of the most common treatments for leukemia. Similar to other chemotherapeutic agents, cisplatin resistance has become a serious issue in cancer therapy. In the present study, we investigated the role of mitochondrial dynamics in the antineoplastic activity of cisplatin in murine leukemia L1210 cells. Firstly, the L1210 cell line resistant to cisplatin (L1210/DDP) was established. Compared to its parental cell line, the IC50 value of cisplatin in the L1210/DDP cells was increased 10-fold...
August 2017: Oncology Reports
https://www.readbyqxmd.com/read/28672961/salidroside-inhibits-high-glucose-induced-proliferation-of-vascular-smooth-muscle-cells-via-inhibiting-mitochondrial-fission-and-oxidative-stress
#15
Xinyu Zhuang, Alimujiang Maimaitijiang, Yong Li, Haiming Shi, Xiaofei Jiang
The mitochondria are highly dynamic organelles, carefully maintaining network homeostasis by regulating mitochondrial fusion and fission. Mitochondrial dynamics are involved in the regulation of a variety of pathophysiological processes, including cell proliferation. Oxidative stress serves an important role in the remodeling of arterial vascular tissue in diabetic patients by affecting the proliferation of vascular smooth muscle cells (VSMCs). Salidroside is the primary active component of Rhodiola rosea and has been demonstrated to be an antioxidant with cardio- and vascular-protective effects, in addition to improving glucose metabolism...
July 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28669827/mitochondria-elongation-is-mediated-through-sirt1-mediated-mfn1-stabilization
#16
Nguyen Thi Kim Oanh, Yong-Yea Park, Hyeseong Cho
Mitochondria are highly dynamic organelles that change size and morphology by fusing together or dividing through fission. In response to cellular cues, signaling cascades may post-translationally modify mitochondria-shaping proteins, which lead to a change in mitochondria morphology. Here we show that nicotinamide (NAM), an inhibitor of sirtuin deacetylases, promotes degradation of mitochondria fusion protein mitofusin 1 (MFN1), suggesting that acetylation status of MFN1 is important for its protein stability...
June 29, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28666985/keratins-regulate-%C3%AE-cell-mitochondrial-morphology-motility-and-homeostasis
#17
Jonas S G Silvander, Sofie M Kvarnström, Angeli Kumari-Ilieva, Anup Shrestha, Catharina M Alam, Diana M Toivola
Loss of the epithelial intermediate filament protein keratin 8 (K8) in murine β-cells leads to irregular insulin vesicles and decreased insulin levels. Because mitochondria are central in glucose-stimulated insulin secretion, the relationship between keratins and β-cell mitochondrial function and morphology was investigated. β-cells in murine K8 knockout (K8(-/-)) islets of Langerhans have increased numbers of mitochondria, which are rounder and have diffuse cristae, as seen by electron microscopy. The mitochondrial network in primary cultured K8(-/-) β-cells is more fragmented compared with K8(+/+) mitochondria, correlating with decreased levels of mitofusin 2 and the mitofusin 2- and keratin-binding protein trichoplein...
June 30, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28626117/physiological-roles-of-mitochondria-and-mitofusins-on-ca-2-signaling-in-smooth-muscles
#18
Hisao Yamamura, Yoshiaki Suzuki, Yuji Imaizumi
No abstract text is available yet for this article.
2017: Nihon Yakurigaku Zasshi. Folia Pharmacologica Japonica
https://www.readbyqxmd.com/read/28608965/hydrogen-sulphide-modulating-mitochondrial-morphology-to-promote-mitophagy-in-endothelial-cells-under-high-glucose-and-high-palmitate
#19
Ning Liu, Jichao Wu, Linxue Zhang, Zhaopeng Gao, Yu Sun, Miao Yu, Yajun Zhao, Shiyun Dong, Fanghao Lu, Weihua Zhang
Endothelial cell dysfunction is one of the main reasons for type II diabetes vascular complications. Hydrogen sulphide (H2 S) has antioxidative effect, but its regulation on mitochondrial dynamics and mitophagy in aortic endothelial cells under hyperglycaemia and hyperlipidaemia is unclear. Rat aortic endothelial cells (RAECs) were treated with 40 mM glucose and 200 μM palmitate to imitate endothelium under hyperglycaemia and hyperlipidaemia, and 100 μM NaHS was used as an exogenous H2 S donor. Firstly, we demonstrated that high glucose and palmitate decreased H2 S production and CSE expression in RAECs...
June 13, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28607589/overexpression-of-mitochondrial-gtpase-mfn2-represents-a-negative-prognostic-marker-in-human-gastric-cancer-and-its-inhibition-exerts-anti-cancer-effects
#20
Chia-Lang Fang, Ding-Ping Sun, Han-Kun Chen, Chih-Chan Lin, Shih-Ting Hung, Yih-Huei Uen, Kai-Yuan Lin
Background: As one of the most common malignancies in the world, little is known about the molecular mechanism underlying gastric cancer (GC) and its progression. In this study, we aimed to investigate the clinical impact of the mitochondrial GTPase mitofusin 2 (MFN2) in GC. Methods: Immunohistochemistry was used to examine the expression levels of MFN2 in gastric tissues obtained from 141 patients with GC. The correlations between MFN2 protein level and clinicopathologic parameters, as well as the significance of MFN2 protein level for overall and disease-free survival were assessed...
2017: Journal of Cancer
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