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https://www.readbyqxmd.com/read/29227732/%C3%AE-8-oxoguanine-dna-glycosylase-overexpression-reduces-oxidative-stress-induced-mitochondrial-dysfunction-and-apoptosis-through-the-jnk-signaling-pathway-in-human-bronchial-epithelial-cells
#1
Ziying Lin, Wenya Xu, Chunyan Li, Yahong Wang, Lawei Yang, Bao'an Zou, Shenglan Gao, Weimin Yao, Zeqing Song, Gang Liu
8-Oxoguanine DNA glycosylase (OGG1) is responsible for repairing 8-oxo-7,8-dihydroguanine (8-oxoG). Our previous study demonstrated that α-OGG1 protects cells from oxidative damage-induced apoptosis and mitochondrial dysfunction in human lung cancer cells. However, the function of β-OGG1 remains to be elucidated. In this study, we demonstrated that overexpressed β-OGG1 has the same role as α-OGG1 in protecting human bronchial epithelial cells from apoptosis and mitochondrial dysfunction. Furthermore, flow cytometry, confocal microscopy, and western blotting showed that the overexpression of β-OGG1 could block oxidant-induced apoptosis in human bronchial epithelial cells...
December 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/29227281/targeting-mcl-1-enhances-dna-replication-stress-sensitivity-to-cancer-therapy
#2
Guo Chen, Andrew T Magis, Ke Xu, Dongkyoo Park, David S Yu, Taofeek K Owonikoko, Gabriel L Sica, Sarah W Satola, Suresh S Ramalingam, Walter J Curran, Paul W Doetsch, Xingming Deng
DNA double-strand breaks (DSBs) are mainly repaired either by homologous recombination (HR) or by nonhomologous end-joining (NHEJ) pathways. Here, we showed that myeloid cell leukemia sequence 1 (Mcl-1) acts as a functional switch in selecting between HR and NHEJ pathways. Mcl-1 was cell cycle-regulated during HR, with its expression peaking in S/G2 phase. While endogenous Mcl-1 depletion reduced HR and enhanced NHEJ, Mcl-1 overexpression resulted in a net increase in HR over NHEJ. Mcl-1 directly interacted with the dimeric Ku protein complex via its Bcl-2 homology 1 and 3 (BH1 and BH3) domains, which are required for Mcl-1 to inhibit Ku-mediated NHEJ...
December 11, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29226997/participation-and-interest-in-support-services-among-family-caregivers-of-older-adults-with-cancer
#3
J Nicholas Dionne-Odom, Allison J Applebaum, Katherine Ornstein, Andres Azuero, Paula P Warren, Richard A Taylor, Gabrielle Rocque, Elizabeth Kvale, Wendy Demark-Wahnefried, Maria Pisu, Edward Partridge, Michelle Y Martin, Marie Bakitas
OBJECTIVE: To describe distressed and underprepared family caregiver's use of and interest in formal support services (e.g., professional counseling, education, organizational assistance). METHODS: Cross-sectional mail survey conducted in communities of eight cancer centers in Tennessee, Alabama, and Florida (response rate: 42%). Family caregivers of Medicare beneficiaries with pancreatic, lung, brain, ovarian, head and neck, hematologic, and stage IV cancers reported support service use and completed validated measures of depression, anxiety, burden, preparedness, and health...
December 11, 2017: Psycho-oncology
https://www.readbyqxmd.com/read/29226550/alpha-klotho-enrichment-in-induced-pluripotent-stem-cell-secretome-contributes-to-antioxidative-protection-in-acute-lung-injury
#4
Amiq Gazdhar, Priya Ravikumar, Johanne Pastor, Manfred Heller, Jianfeng Ye, Jianning Zhang, Orson W Moe, Thomas Geiser, Connie C W Hsia
Induced pluripotent stem cells (iPSCs) has been reported to alleviate organ injury, although the mechanisms of action remain unclear and administration of intact cells faces many limitations. We hypothesized that cell-free conditioned media (CM) containing the secretome of iPSCs possess antioxidative constituents that can alleviate pulmonary oxidant stress damage. We derived iPSCs from human dermal fibroblasts and harvested the CM. Addition of iPSC CM to cultured human alveolar type-1 epithelial cells mitigated hyperoxia-induced depletion of endogenous total antioxidant capacity (TAC) while tracheal instillation of iPSC CM into adult rat lungs enhanced hyperoxia-induced increase in TAC...
December 11, 2017: Stem Cells
https://www.readbyqxmd.com/read/29225158/exendin-4-partly-ameliorates-of-hyperglycemia-mediated-tissue-damage-in-lungs-of-streptozotocin-induced-diabetic-mice
#5
Fusun Oztay, Serap Sancar Bas, Selda Gezginci-Oktayoglu, Merve Ercin, Sehnaz Bolkent
Glucagon-like peptide-1 (GLP-1) stimulates insulin secretion, and plays anti-inflammatory role in atherosclerosis, and has surfactant-releasing effects in lungs. GLP-1 analogues are used in diabetes therapy. This is the first study to investigate the effects of exendin-4, a GLP-1 receptor agonist, on lung injury in diabetic mice. BALB/c male mice were divided into four groups. The first group was given only citrate buffer, the second group was given only exendin-4, the third group was given only streptozotocin (STZ), and the fourth group was given both exendin-4 and STZ...
December 7, 2017: Peptides
https://www.readbyqxmd.com/read/29224851/the-effects-of-exercise-on-depressive-and-anxiety-like-behaviors-as-well-as-lung-and-hippocampus-oxidative-stress-in-ovalbumin-sensitized-juvenile-rats
#6
Amin Mokhtari-Zaer, Mahmoud Hosseini, Mohammad Hossein Boskabady
Allergic asthma during early life period has been reported to be associated with neurochemical and behavioral disorders, including anxiety and depression. We aimed to determine the effects of exercise on depressive- and anxiety-like behaviors as well as lung and hippocampus oxidative stress in ovalbumin (OVA)-sensitized juvenile rats. Animals were divided into 4 groups including control (non-exercised and non-sensitized), Exe (exercise and non-sensitized); OVA (non-exercised and OVA-sensitized); and OVA+Exe (exercised and OVA-sensitized)...
December 7, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/29224009/itraq-based-proteomics-analysis-of-acute-lung-injury-induced-by-oleic-acid-in-mice
#7
Xiaotao Xu, Qingwei Zhu, Rong Zhang, Yan Wang, Fangfang Niu, Wenying Wang, Dawei Sun, Aizhong Wang
BACKGROUND/AIMS: This study was conducted to investigate the relationship between differentially expressed proteins (DEPs) and the pathogenesis of oleic acid (OA)-induced acute lung injury (ALI) in mice. METHODS: Eight-week-old male C57BL/6 mice were injected with OA through the tail vein and sacrificed 6 hours after OA administration to identify protein expression levels in lung tissue using isobaric tags for relative and absolute quantification (iTRAQ) technology...
December 8, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29222191/nfs1-expression-protects-lung-tumor-cells-from-ferroptosis
#8
(no author information available yet)
NFS1 activity is essential for maintenance of iron-sulfur cluster biosynthesis in response to oxidative stress.
December 8, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/29222111/rap1b-promotes-vegf-induced-endothelial-permeability-and-is-required-for-dynamic-regulation-of-endothelial-barrier
#9
Sribalaji Lakshmikanthan, Magdalena Sobczak, Sergio Li Calzi, Lynn Shaw, Maria B Grant, Magdalena Chrzanowska-Wodnicka
Vascular Endothelial Growth Factor (VEGF), a key angiogenic and permeability factor, plays an important role in new blood vessel formation. However, abnormal VEGF-induced VEGFR2 signaling leads to hyper-permeability. We demonstrated that Rap1, best known for promoting cell adhesion and vessel stability, is a critical regulator of VEGFR2-mediated angiogenic and shear-stress EC responses. To determine Rap1's role in endothelial barrier dynamics, we examined vascular permeability in EC-specific Rap1A- and Rap1B- knockout mice, cell-cell junction remodeling and EC monolayer resistivity in Rap1-deficient ECs under basal, inflammatory or elevated VEGF conditions...
December 8, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/29221328/uncontrolled-and-under-diagnosed-asthma-in-a-damascus-shelter-during-the-syrian-crisis
#10
Yousser Mohammad, Shaaban Rafea, Youssef Latifeh, Ali Khaddam, Bisher Sawaf, Mhd Ismael Zakaria, Mohammad Sadek Al Masalmeh, Yaser Fawaz, Abdoulraouf Allaham, Imad Almani, Hiba El-Tarcheh, Ayham Ghazal, Ali Zaher, Hala Rifai, Hamed Joumah, S Dresden Glockler-Lauf, Teresa To
Background: Studies have shown that poor shelter or dwelling conditions may lead to deteriorations in health. Those with asthma may be more susceptible to compromised living conditions and stress leading to a higher risk of asthma exacerbations. To describe the asthma control and quality of life of individuals with diagnosed asthma living in a shelter in Damascus, Syria and estimate the prevalence of respiratory symptoms in shelter dwellers without diagnosed asthma. Methods: In this cross-sectional study, all individuals 5 years and older living in Al-Herjalleh shelter with diagnosed asthma were recruited to complete a questionnaire, which included items related to their respiratory symptoms, asthma exacerbations, exposure to asthma triggers, medication use, and health-related quality of life before and since entering the shelter...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29218257/pulmonary-tuberculosis-versus-recurrent-chemotherapy-induced-pneumonitis-a-clinical-dilemma
#11
Gulrayz Ahmed, Muhammad W Saif
Chemotherapy-induced lung toxicity can affect pulmonary parenchyma, pleura, airways, pulmonary vascular system, mediastinum or the neuromuscular system that is responsible for respiration. Chemotherapy-induced pulmonary toxicity is a diagnosis of exclusion. When the patients with malignancies develop pulmonary toxicity such as pneumonitis and distinguishing it from alternative diseases such as infectious, thrombotic, cardiac, malignant or exacerbation of chronic lung conditions can be difficult. Moreover, such patients are often immunosuppressed, physically stressed from the underlying disease and the cancer treatment and hence, more susceptible to usual and unusual or opportunistic infections...
October 4, 2017: Curēus
https://www.readbyqxmd.com/read/29218106/extracorporeal-shock-wave-therapy-effectively-protects-brain-against-chronic-cerebral-hypo-perfusion-induced-neuropathological-changes
#12
Han-Tan Chai, Kuan-Hung Chen, Christopher Glenn Wallace, Chih-Hung Chen, Pei-Hsun Sung, Yung-Lung Chen, Chun-Man Yuen, Pei-Lin Shao, Cheuk-Kwan Sun, Hsueh-Wen Chang, Ching-Jen Wang, Mel S Lee, Hon-Kan Yip, Sheung-Fat Ko
This study tested the hypothesis that extracorporeal shock wave (ECSW) therapy could protect mouse brain from chronic cerebral hypoperfusion (CHP)-induced neuropathological changes in a bilateral carotid arterial stenosis (CAS) model. Adult-male C57BL/6 (B6) mice (n=36) were randomized into group 1 (sham-control), group 2 (CHP) and group 3 [CHP+ECSW (100 impulses at 0.15 mJ/mm2) on day 5, 10 and 15 after CHP induction]. By day 60 after CHP induction, the white matter lesion, protein expressions of inflammatory (TNF-α/NF-κB/iNOS), oxidative-stress (NOX-1/NOX-2/NOX-4/nitrotyrosine), angiogenesis (eNOS/CD31), apoptotic (Bax/caspase-3/PARP), fibrotic (Smad3/TGF-ß) and mitochondrial-damaged (cytosolic cytochrome-C) biomarkers were significantly higher in group 2 than in groups 1 and 3, and significantly higher in group 3 than in group 1, whereas the protein expressions of anti-apoptotic (Bcl-2), anti-fibrotic (BMP-2/Smad1/5), and mitochondrial-integrity (mitochondrial cytochrome-C) biomarkers showed an opposite pattern to inflammation among the three groups (all P<0...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/29218013/lung-oxidative-stress-dna-damage-apoptosis-and-fibrosis-in-adenine-induced-chronic-kidney-disease-in-mice
#13
Abderrahim Nemmar, Turan Karaca, Sumaya Beegam, Priya Yuvaraju, Javed Yasin, Badreldin H Ali
It is well-established that there is a crosstalk between the lung and the kidney, and several studies have reported association between chronic kidney disease (CKD) and pulmonary pathophysiological changes. Experimentally, CKD can be caused in mice by dietary intake of adenine. Nevertheless, the consequence of such intervention on the lung received only scant attention. Here, we assessed the pulmonary effects of adenine (0.2% w/w in feed for 4 weeks)-induced CKD in mice by assessing various physiological histological and biochemical endpoints...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29216224/cytotoxicity-of-portoamides-in-human-cancer-cells-and-analysis-of-the-molecular-mechanisms-of-action
#14
Tiago Ribeiro, Filipa Lemos, Marco Preto, Joana Azevedo, Maria Lígia Sousa, Pedro N Leão, Alexandre Campos, Stig Linder, Rui Vitorino, Vitor Vasconcelos, Ralph Urbatzka
Portoamides are cyclic peptides produced and released by the cyanobacterial strain Phormidium sp. presumably to interfere with other organisms in their ecosystems ("allelopathy"). Portoamides were previously demonstrated to have an antiproliferative effect on human lung carcinoma cells, but the underlying mechanism of this activity has not been described. In the present work, the effects of portoamides on proliferation were examined in eight human cancer cell lines and two non-carcinogenic cell lines, and major differences in sensitivities were observed...
2017: PloS One
https://www.readbyqxmd.com/read/29212215/betanodavirus-b2-protein-triggers-apoptosis-and-necroptosis-in-lung-cancer-cells-that-suppresses-autophagy
#15
Hsuan-Wen Chiu, Yu-Chin Su, Jiann-Ruey Hong
The betanodavirus B2 protein targets the mitochondria and acts as a "death factor", but its effect on lung cancer cells is unknown. We examined the effect of the B2 protein on triggering apoptosis or necroptosis via P53-dependent and P53-independent pathways and increased in suppression of autophagy. The B2 protein targets the mitochondria of A549 (P53+/+) and H1299 (P53-/-) lung cancer cells due to a specific signal sequence (41RTFVISAHAA50). This triggers generation of reactive oxygen species within the mitochondria, and a minor stress response in A549 cells, but a strong stress response in H1299 cells...
November 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/29212036/%C3%AE-np63-inhibits-oxidative-stress-induced-cell-death-including-ferroptosis-and-cooperates-with-the-bcl-2-family-to-promote-clonogenic-survival
#16
Gary X Wang, Ho-Chou Tu, Yiyu Dong, Anders Jacobsen Skanderup, Yufeng Wang, Shugaku Takeda, Yogesh Tengarai Ganesan, Song Han, Han Liu, James J Hsieh, Emily H Cheng
The BCL-2 family proteins are central regulators of apoptosis. However, cells deficient for BAX and BAK or overexpressing BCL-2 still succumb to oxidative stress upon DNA damage or matrix detachment. Here, we show that ΔNp63α overexpression protects cells from oxidative stress induced by oxidants, DNA damage, anoikis, or ferroptosis-inducing agents. Conversely, ΔNp63α deficiency increases oxidative stress. Mechanistically, ΔNp63α orchestrates redox homeostasis through transcriptional control of glutathione biogenesis, utilization, and regeneration...
December 5, 2017: Cell Reports
https://www.readbyqxmd.com/read/29211841/perioperative-benefit-and-outcome-of-thoracic-epidural-in-esophageal-surgery-a-clinical-review
#17
P Feltracco, A Bortolato, S Barbieri, E Michieletto, E Serra, A Ruol, S Merigliano, C Ori
Surgery for esophageal cancer is a highly stressful and painful procedure, and a significant amount of analgesics may be required to eliminate perioperative pain and blunt the stress response to surgery. Proper management of postoperative pain has invariably been shown to reduce the incidence of postoperative complications and accelerate recovery. Neuraxial analgesic techniques after major thoracic and upper abdominal surgery have long been established to reduce respiratory, cardiovascular, metabolic, inflammatory, and neurohormonal complications...
December 2, 2017: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/29209456/novel-glutathione-containing-dry-yeast-extracts-inhibit-eosinophilia-and-mucus-overproduction-in-a-murine-model-of-asthma
#18
Yun-Ho Kim, Yean-Jung Choi, Eun-Jung Lee, Min-Kyung Kang, Sin-Hye Park, Dong Yeon Kim, Hyeongjoo Oh, Sang-Jae Park, Young-Hee Kang
BACKGROUND/OBSECTIVE: Airway inflammation by eosinophils, neutrophils and alveolar macrophages is a characteristic feature of asthma that leads to pathological subepithelial thickening and remodeling. Our previous study showed that oxidative stress in airways resulted in eosinophilia and epithelial apoptosis. The current study investigated whether glutathione-containing dry yeast extract (dry-YE) ameliorated eosinophilia, goblet cell hyperplasia and mucus overproduction. MATERIALS/METHOD: This study employed 2 µg/mL lipopolysaccharide (LPS)- or 20 ng/mL eotaxin-1-exposed human bronchial epithelial cells and ovalbumin (OVA)-challenged mice...
December 2017: Nutrition Research and Practice
https://www.readbyqxmd.com/read/29207557/lobocrassin-b-induces-apoptosis-of-human-lung-cancer-and-inhibits-tumor-xenograft-growth
#19
Meng-Xian Lin, Shen-Hao Lin, Yi-Rong Li, Ya-Hsuan Chao, Ching-Hsiung Lin, Jui-Hsin Su, Chi-Chien Lin
Lobocrassin B, a natural cembrane-type compound isolated from the soft coral Lobophytum crassum, has been shown to have significant biological effects, including anticancer activity. As the most common cause of cancer mortality worldwide, lung cancer remains a major concern threatening human health. In the current study, we conducted in vitro experiments to demonstrate the inhibiting effect of Lobocrassin B on CL1-5 and H520 human lung cancer cells growth and to explore the underlying mechanisms, as well as in nude mice bearing CL1-5 tumor xenografts...
December 4, 2017: Marine Drugs
https://www.readbyqxmd.com/read/29207156/mapk-inhibitors-particularly-the-jnk-inhibitor-increase-cell-death-effects-in-h2o2-treated-lung-cancer-cells-via-increased-superoxide-anion-and-glutathione-depletion
#20
Woo Hyun Park
Reactive oxygen species (ROS), especially hydrogen peroxide (H2O2), induce apoptosis in cancer cells by regulating mitogen-activated protein kinase (MAPK) signaling pathways. The present study investigated the effects of MAPK inhibitors on cell growth and death as well as changes in ROS and glutathione (GSH) levels in H2O2-treated Calu-6 and A549 lung cancer cells. H2O2 inhibited growth and induced death of Calu-6 and A549 lung cancer cells. All MAPK inhibitors appeared to enhance growth inhibition in H2O2-treated Calu-6 and A549 lung cancer cells and increased the percentage of Annexin V-FITC-positive cells in these cancer cells...
November 24, 2017: Oncology Reports
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