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https://www.readbyqxmd.com/read/29054969/%C3%AE-mangostin-protects-against-high-glucose-induced-apoptosis-of-human-umbilical-vein-endothelial-cells
#1
Yanli Luo, Minxiang Lei
Diabetic vascular complications result from high glucose -induced vascular endothelial cell dysfunction. There is an emerging need for novel drugs with vascular endothelial cell -protective effects for the treatment of diabetic vascular complications. This study aimed to investigate the protective effect of α-mangostin against high-glucose-induced apoptosis of cultured human umbilical vein endothelial cells (HUVECs). HUVECs were treated with glucose to induce apoptosis. The expression of the apoptosis-related proteins, Bcl-2, Bax and cleaved caspase-3, were detected by Western blotting...
October 20, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/29054965/adenovirus-mediated-artificial-microrna-targeting-fibrinogen-like-protein-2-attenuates-the-severity-of-acute-pancreatitis-in-mice
#2
Xiaohua Ye, Jin Ding, Yanping Chen, Jiayue Dong
Severe acute pancreatitis (SAP) remains to be challenging for its unpredictable inflammatory progression from acute pancreatitis to SAP. Apoptosis is an important pathology of SAP. Fibrinogen-like protein 2 (FGL2) has been reported to be involved in apoptosis. The present study aimed to explore the therapeutic effect of an adenovirus-mediated artificial microRNA targeting FGL2 (Ad-FGL2-miRNA) in taurocholate-induced murine pancreatitis models. Sodium taurocholate was retrogradely injected into the biliopancreatic ducts of the C57/BL mice to induce SAP...
October 20, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/29054697/a-novel-method-for-oxygen-glucose-deprivation-model-in-organotypic-spinal-cord-slices
#3
Jing-Jie Liu, Xiao-Yan Ding, Li Xiang, Feng Zhao, Sheng-Li Huang
This study aimed to establish a model to closely mimic spinal cord hypoxic-ischemic injury with high production and high reproducibility. Fourteen-day cultured organotypic spinal cord slices were divided into 4 groups: control (Ctrl), oxygen glucose deprived for 30min (OGD 30min), OGD 60min, and OGD 120min. The Ctrl slices were incubated with 1ml propidium iodide (PI) solution (5μg/ml) for 30minutes. The OGD groups were incubated with 1ml glucose-free DMEM/F12 medium and 5μl PI solution (1mg/ml) for 30min, 60min and 120min, respectively...
October 17, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/29054471/innate-immunity-and-tolerance-toward-mitochondria
#4
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/29054455/dadle-enhances-viability-and-anti-inflammatory-effect-of-human-mscs-subjected-to-serum-free-apoptotic-condition-in-part-via-the-dor-pi3k-akt-pathway
#5
L Vinod Kumar Reddy, Dwaipayan Sen
AIM: Nutritional deprivation and inflammation-rich zones are the major causative reasons for poor survivability of transplanted mesenchymal stem cells (MSCs). Therefore in the present study, we demonstrated the cytoprotective and anti-inflammatory effects of activated delta (δ)-opioid receptor (DOR) with synthetic peptide [D-Ala(2), D-Leu(5)]-enkephalin (DADLE) treatment on human MSCs cultured in serum-starved condition. MAIN METHODS: Cell viability was measured using MTT and Annexin V/PI assays...
October 17, 2017: Life Sciences
https://www.readbyqxmd.com/read/29054451/phenolic-alkaloid-oleracein-e-attenuates-oxidative-stress-and-neurotoxicity-in-alcl3-treated-mice
#6
Lingyu Li, Yanni Jiao, Tianyun Jin, Hongxiang Sun, Shaoqiang Li, Cuirong Jin, Shuiyao Hu, Jianbo Ji, Lan Xiang
AIMS: Chelation therapy and antioxidant supplements have been demonstrated to be useful in ameliorating aluminum (Al) induced neurotoxicity. Oleracein E (OE) is a phenolic antioxidant alkaloid which possesses a rare tetrahydroisoquinoline/pyrrolidone tricyclic skeleton and a catechol moiety. The aim of this study was to investigate whether OE can chelate with Al and alleviate AlCl3-induced oxidative stress and neurotoxicity. MAIN METHODS: Kunming mice were administered AlCl3 (40mg/kg/d, i...
October 17, 2017: Life Sciences
https://www.readbyqxmd.com/read/29054447/deletion-ofmst1-attenuates-neuronal-loss-andimproves-neurological-impairment-inarat-model-oftraumatic-brain-injury
#7
Di Li, Haibo Ni, Qin Rui, Rong Gao, Gang Chen
Neuronal cell death following traumatic brain injury (TBI) is a considerable contributor to neurological deficits. In our work, we explored the functions of Mammalian STE20-like kinase-1 (Mst1), a apoptosis-promoting kinase and aslo a pivotal bridgebuilder of apoptotic signaling, in the etiopathogenesis of an experimental rat model of TBI. We found that the phosphorylation level of Mst1 in injured area was significantly increased after TBI. Furthermore, we discovered that inhibition of Mst1 phosphorylation can effectively reduce neuronal cell death by inhibiting the activation of caspase 3 and suppressing the damage of DNA during TBI...
October 17, 2017: Brain Research
https://www.readbyqxmd.com/read/29054429/surface-chemistry-induces-mitochondria-mediated-apoptosis-of-breast-cancer-cells-via-pten-pi3k-akt-signaling-pathway
#8
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/29054408/hdac6-deficiency-induces-apoptosis-in-mesenchymal-stem-cells-through-p53-k120-acetylation
#9
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/29054108/increase-in-pro-apoptotic-activity-of-inhibitory-pas-domain-protein-via-phosphorylation-by-mk2
#10
Shuya Kasai, Mary Jane Elizabeth Richardson, Satoru Torii, Ken-Ichi Yasumoto, Hiroki Shima, Kazuhiko Igarashi, Ken Itoh, Kazuhiro Sogawa, Kazutaka Murayama
Inhibitory PAS domain protein (IPAS) is a bifunctional protein that downregulates hypoxic gene expression and exerts pro-apoptotic activity by preventing pro-survival activity of Bcl-xL and its related factors. Pro-apoptotic activity of IPAS is attenuated by the activation of the PINK1-Parkin pathway, and involved in neuronal degeneration in an experimental mouse model of Parkinson's disease. The current study shows that phosphorylation of IPAS at Ser184 by MAPK-activated protein kinase 2 (MK2 or MAPKAPK2) enhances the pro-apoptotic function of IPAS...
October 20, 2017: FEBS Journal
https://www.readbyqxmd.com/read/29053994/dietary-resveratrol-confers-apoptotic-resistance-to-oxidative-stress-in-myoblasts
#11
Satoshi Haramizu, Shinichi Asano, David C Butler, David A Stanton, Ameena Hajira, Junaith S Mohamed, Stephen E Alway
High levels of reactive oxygen species (ROS) contribute to muscle cell death in aging and disuse. We have previously found that resveratrol can reduce oxidative stress in response to aging and hindlimb unloading in rodents in vivo, but it was not known if resveratrol would protect muscle stem cells during repair or regeneration when oxidative stress is high. To test the protective role of resveratrol on muscle stem cells directly, we treated the C2C12 mouse myoblast cell line with moderate (100 μM) or very high (1 mM) levels of H2O2 in the presence or absence of resveratrol...
August 24, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29053764/contribution-of-calpain-and-caspases-to-cell-death-in-cultured-monkey-rpe-cells
#12
Emi Nakajima, Katherine B Hammond, Masayuki Hirata, Thomas R Shearer, Mitsuyoshi Azuma
Purpose: AMD is the leading cause of human vision loss after 65 years of age. Several mechanisms have been proposed: (1) age-related failure of the choroidal vasculature leads to loss of RPE; (2) RPE dysfunctions due to accumulation of phagocytized, but unreleased A2E (N-retinylidene-N-retinylethanolamine); (3) zinc deficiency activation of calpain and caspase proteases, leading to cell death. The purpose of the present study is to compare activation of calpain and caspase in monkey RPE cells cultured under hypoxia or with A2E...
October 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29053706/solea-senegalensis-sperm-cryopreservation-new-insights-on-sperm-quality
#13
Marta F Riesco, Catarina Oliveira, Florbela Soares, Paulo J Gavaia, María T Dinis, Elsa Cabrita
Cryopreservation of Senegalese sole sperm can represent an alternative to overcome some reproductive problems of this species. However, it is important to guarantee the safe use of cryopreserved sperm by selecting an appropriate protocol according to a high demand quality need to be ensured. It has been demonstrated that traditional assays such as motility and viability do not provide enough information to identify specific damage caused by cryopreservation process (freezing and thawing). Specific tests, including lipid peroxidation and DNA damage, should be performed...
2017: PloS One
https://www.readbyqxmd.com/read/29053277/utilizing-inverse-emulsion-polymerization-to-generate-responsive-nanogels-for-cytosolic-protein-delivery
#14
Kishore Raghupathi, Scott J Eron, Francesca Anson, Jeanne A Hardy, S Thayumanavan
Therapeutic biologics have various advantages over synthetic drugs in terms of selectivity, their catalytic nature and thus, therapeutic efficacy. These properties offer the potential for more effective treatments that may also overcome the undesirable side effects observed due to off-target toxicities of small-molecule drugs. Unfortunately, systemic administration of biologics is challenging due to cellular penetration, renal clearance and enzymatic degradation difficulties. A delivery vehicle that can overcome these challenges and deliver biologics to specific cellular populations has the potential for significant therapeutic impact...
October 20, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29053143/momp-cell-suicide-as-a-bcl-2-family-business
#15
REVIEW
Halime Kalkavan, Douglas R Green
Apoptosis shapes development and differentiation, has a key role in tissue homeostasis, and is deregulated in cancer. In most cases, successful apoptosis is triggered by mitochondrial outer membrane permeabilization (MOMP), which defines the mitochondrial or intrinsic pathway and ultimately leads to caspase activation and protein substrate cleavage. The mitochondrial apoptotic pathway centered on MOMP is controlled by an intricate network of events that determine the balance of the cell fate choice between survival and death...
October 20, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29052919/oamdp-a-novel-podophyllotoxin-derivative-induces-apoptosis-cell-cycle-arrest-and-autophagy-in-hepatoma-hepg2-cells
#16
Jie Ren, Yu Liu, Lixia Li, Yuexin Zhao, Zhongyu Li, Chao Wu, Lin Chen, Kun Hu
4β-(1,3,4-oxadiazole-2-amino-5-methyl)-4-deoxypodophyllotoxin (OAMDP), a novel podophyllotoxin derivative, has demonstrated potent anti-tumor activity with significant cytotoxic effect. Here we report the anti-proliferative effect of OAMDP, for which OAMDP could suppress the proliferation of HepG2 cells (human hepatoma cell line) in a dose- and time-dependent manner. After treating with OAMDP, cell apoptosis was confirmed by Annexin V-FITC/PI double staining assay. Furthermore, flow cytometry analysis revealed the loss of mitochondrial membrane potential and the increase of intracellular reactive oxygen species in HepG2 cells...
October 20, 2017: Cell Biology International
https://www.readbyqxmd.com/read/29052839/effects-of-microrna-206-and-its-target-gene-igf-1-on-sevoflurane-induced-activation-of-hippocampal-astrocytes-in-aged-rats-through-the-pi3k-akt-creb-signaling-pathway
#17
Tie-Jun Liu, Bin Wang, Qun-Xi Li, Xiao-Liu Dong, Xiao-Liang Han, Shu-Bo Zhang
The study aims to explore the effects of microRNA-206 (miR-206) targeting IGF-1 on the activation of hippocampal astrocytes in aged rats induced by sevoflurane through the PI3K/AKT/CREB signaling pathway. Wistar rats and astrocytes were divided into the normal/blank, sham/negative control (NC), sevoflurane (sevo), miR-206 mimics + sevo, miR-206 inhibitors + sevo, miR-206 NC + sevo, IGF-1 shRNA + sevo and miR-206 inhibitors + IGF-1 shRNA + sevo groups. The Morris water maze test was exhibited to assess the cognitive functions...
October 20, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29052227/adjuvant-pretreatment-with-alum-protects-neonatal-mice-in-sepsis-through-myeloid-cell-activation
#18
Jaimar C Rincon, Angela L Cuenca, Steven L Raymond, Brittany Mathias, Dina C Nacionales, Ricardo Ungaro, Philip A Efron, James L Wynn, Lyle L Moldawer, Shawn D Larson
The high mortality in neonatal sepsis has been related to both quantitative and qualitative differences in host protective immunity. Especially in the premature neonate where outcomes from sepsis are so dismal, pretreatment strategies to prevent sepsis have received inadequate consideration. Aluminum-based adjuvants (alum) are currently used in many pediatric vaccines, but their use as an innate immune stimulant alone has not been well studied. We asked whether pre-treatment with alum adjuvant alone could improve outcome and host innate immunity in neonatal mice given polymicrobial sepsis...
October 20, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/29052145/cell-death-pathways-a-novel-therapeutic-approach-for-neuroscientists
#19
REVIEW
G Morris, A J Walker, M Berk, M Maes, B K Puri
In the first part, the following mechanisms involved in different forms of cell death are considered, with a view to identifying potential therapeutic targets: tumour necrosis factor receptors (TNFRs) and their engagement by tumour necrosis factor-alpha (TNF-α); poly [ADP-ribose] polymerase (PARP)-1 cleavage; the apoptosis signalling kinase (ASK)-c-Jun N-terminal kinase (JNK) axis; lysosomal permeability; activation of programmed necrotic cell death; oxidative stress, caspase-3 inhibition and parthanatos; activation of inflammasomes by reactive oxygen species and the development of pyroptosis; oxidative stress, calcium dyshomeostasis and iron in the development of lysosomal-mediated necrosis and lysosomal membrane permeability; and oxidative stress, lipid peroxidation, iron dyshomeostasis and ferroptosis...
October 19, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/29051813/differential-impact-of-various-reactive-oxygen-species-ros-on-hif-1%C3%AE-p53-direct-interaction-in-sk-n-mc-neuroblastoma-cells
#20
Elham Parandavar, Razieh Yazdanparast
BACKGROUND: A vital property of eukaryotic cells physiology is their rather quick response to variation of oxygen tension, mainly by a transcription factor known as hypoxia-inducible factor-1 (HIF-1). Aside from its transcriptional regulation, other mechanisms, such as post translational modifications and protein-protein interactions, the interaction between HIF-1α and p53 has attracted more attention mainly due to simultaneous enhancement in the protein levels of these two anti- and pro-apoptotic vital transcriptional factors within the ROS-stressed cells...
2017: Cell & Bioscience
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