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https://www.readbyqxmd.com/read/29774099/camptothecin-induces-g-2-m-phase-arrest-through-the-atm-chk2-cdc25c-axis-as-a-result-of-autophagy-induced-cytoprotection-implications-of-reactive-oxygen-species
#1
Rajapaksha Gedara Prasad Tharanga Jayasooriya, Matharage Gayani Dilshara, Ilandarage Menu Neelaka Molagoda, Cheol Park, Sang Rul Park, Seungheon Lee, Yung Hyun Choi, Gi-Young Kim
In the present study, we report that camptothecin (CPT) caused irreversible cell cycle arrest at the G2 /M phase, and was associated with decreased levels of cell division cycle 25C (Cdc25C) and increased levels of cyclin B1, p21, and phospho-H3. Interestingly, the reactive oxygen species (ROS) inhibitor, glutathione, decreased CPT-induced G2 /M phase arrest and moderately induced S phase arrest, indicating that the ROS is required for the regulation of CPT-induced G2 /M phase arrest. Furthermore, transient knockdown of nuclear factor-erythroid 2-related factor 2 (Nrf2), in the presence of CPT, increased the ROS' level and further shifted the cell cycle from early S phase to the G2 /M phase, indicating that Nrf2 delayed the S phase in response to CPT...
April 24, 2018: Oncotarget
https://www.readbyqxmd.com/read/29773191/anti-inflammatory-and-antinociceptive-effects-of-2-2-dipyridyl-diselenide-through-reduction-of-inducible-nitric-oxide-synthase-nuclear-factor-kappa-b-and-c-jun-n-terminal-kinase-phosphorylation-levels-in-the-mouse-spinal-cord
#2
Suzan Gonçalves Rosa, César Augusto Brüning, Ana Paula Pesarico, Ana Cristina Guerra de Souza, Cristina Wayne Nogueira
Appropriate treatment of pain requires analgesics and anti-inflammatory drugs generally associated with undesirable side effects and not fully effective in a significant proportion of patients. Organoselenium compounds elicit a plenty of pharmacological effects in different animal models. Among these compounds, the 2,2`-dipyridyl diselenide (DPD) has a potent antioxidant effect and low toxicity. In this way, the aim of this study was to investigate the possible DPD antinociceptive effect and its mechanism of action, as well as the safety of the compound...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29773103/-curcumin-alleviates-early-brain-injury-following-subarachnoid-hemorrhage-in-rats-by-inhibiting-jnk-c-jun-signal-pathway
#3
Xia Li, Ji Zhu
Objective To investigate the inhibitory effect of curcumin on early brain injury following subarachnoid hemorrhage (SAH) by inhibiting JNK/ c-Jun signal pathway. Methods Sixty adult male SD rats were randomly divided into four groups: sham operation group (sham group), SAH group, SAH group treated with 100 mg/(kg.d) curcumin and SAH group treated with 200 mg/(kg.d) curcumin, with 15 rats in each group. Endovascular puncture was used to induce SAH model. Nissl staining was used to test whether neurons were broken...
March 2018: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/29772805/ethyl-acetate-fraction-from-persimmon-diospyros-kaki-ameliorates-cerebral-neuronal-loss-and-cognitive-deficit-via-the-jnk-akt-pathway-in-tmt-induced-mice
#4
Jong Min Kim, Seon Kyeong Park, Jin Yong Kang, Su Bin Park, Seul Ki Yoo, Hye Ju Han, Chul-Woo Kim, Uk Lee, Sea-Hyun Kim, Ho Jin Heo
This study was conducted to assess the antioxidant capacity and protective effect of the ethyl acetate fraction from persimmon ( Diospyros kaki ) (EFDK) on H₂O₂-induced hippocampal HT22 cells and trimethyltin chloride (TMT)-induced Institute of Cancer Research (ICR) mice. EFDK had high antioxidant activities and neuroprotective effects in HT22 cells. EFDK ameliorated behavioral and memory deficits in Y-maze, passive avoidance and Morris water maze tests. Also, EFDK restored the antioxidant system by regulating malondialdehyde (MDA), superoxide dismutase (SOD) and reduced gluthathione (GSH), and the cholinergic system by controlling the acetylcholine (ACh) level and acetylcholinesterase (AChE) activity and expression...
May 17, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29772703/alpha-mangostin-improves-insulin-secretion-and-protects-ins-1-cells-from-streptozotocin-induced-damage
#5
Dahae Lee, Young-Mi Kim, Kiwon Jung, Young-Won Chin, Ki Sung Kang
Alpha (α)-mangostin, a yellow crystalline powder with a xanthone core structure, is isolated from mangosteen ( Garcinia mangostana ), which is a tropical fruit of great nutritional value. The aim of the present study was to investigate the anti-diabetic effects of α-mangostin and to elucidate the molecular mechanisms underlying its effect on pancreatic beta (β)-cell dysfunction. To assess the effects of α-mangostin on insulin production, rat pancreatic INS-1 cells were treated with non-toxic doses of α-mangostin (1⁻10 μM) and its impact on insulin signaling was examined by Western blotting...
May 16, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29771436/correlations-of-neuronal-apoptosis-with-expressions-of-c-fos-and-c-jun-in-rats-with-post-ischemic-reconditioning-damage
#6
P Xiao, X-W Liu, N-N Zhao, R Fang, Q Wen, K-X Zeng, Y-L Wang
OBJECTIVE: Transcription factors (c-Fos and c-Jun) have been considered to play roles in the initiation of programmed nerve cell death. However, the roles of c-Fos and c-Jun protein expressions in neuronal apoptosis of rats with post-ischemic reconditioning damage were not clarified. Therefore, the aim of this study was to investigate the correlations of protein expressions of c-Fos and c-Jun with neuronal apoptosis of rats with post-ischemic reconditioning damage. MATERIALS AND METHODS: Rat models of post-ischemic reconditioning were established firstly...
May 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29769546/effects-of-the-th2-dominant-milieu-on-allergic-responses-in-der-f-1-activated-mouse-basophils-and-mast-cells
#7
Myung-Hee Yi, Hyoung-Pyo Kim, Kyoung Yong Jeong, Ju Yeong Kim, In-Yong Lee, Tai-Soon Yong
Although basophils and mast cells share similar phenotypic and functional properties, little is known about the difference in the initial Th2 immune responses of these cells following exposure to proteolytic allergens. Here, we investigated the mechanisms of Th2-mediated immune responses in mouse bone marrow-derived basophils (BMBs) and mast cells (BMMCs) via stimulation with the cysteine protease allergen Der f 1. Our results showed that Th2 cytokines were induced from BMBs by active recombinant Der f 1 (rDer f 1 independently with Toll-like receptor (TLR) 2 and TLR4...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29768537/the-protection-effect-and-mechanism-of-hyperbaric-oxygen-therapy-in-rat-brain-with-traumatic-injury
#8
Pengcheng Xing, Ke Ma, Lijuan Li, Donglian Wang, Guoyong Hu, Wei Long
PURPOSE: To investigate the effect of hyperbaric oxygen therapy (HBOT) on traumatic brain injury (TBI) outcome. METHODS: The modified Marmarou's weight drop device was used to generate non-lethal moderate TBI rat model, and further developed in vitro astrocytes culturing system. Then, we analyzed the expression changes of interested genes and protein by quantitative PCR and western blot. RESULTS: Multiple HBO treatments significantly reduced the expression of apoptosis promoting genes, such as c-fos, c-jun, Bax and weakened the activation of Caspase-3 in model rats...
April 2018: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/29767257/bmp%C3%A2-6-protects-retinal-pigment-epithelial-cells-from-oxidative-stress%C3%A2-induced-injury-by-inhibiting-the-mapk-signaling-pathways
#9
Li Chen, Ming Liu, Yan Luan, Yingfei Liu, Zhichao Zhang, Bo Ma, Xuan Liu, Yong Liu
Worldwide, neovascular age‑related macular degeneration (nAMD) is one of the most common causes of blindness in the elderly. In particular, degeneration of retinal pigment epithelial (RPE) cells represents the main pathological process in the development of nAMD, and oxidative stress serves a major role. The present study aimed to investigate the association between bone morphogenetic protein 6 (BMP‑6) and nAMD. BMP‑6 concentration was significantly reduced in patients with wet nAMD compared with in the control group...
May 14, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29767241/transcriptome-sequencing-analysis-reveals-the-effect-of-combinative-treatment-with-low%C3%A2-intensity-pulsed-ultrasound-and-magnesium-ions-on-hfob1-19-human-osteoblast-cells
#10
Haiyue Zu, Xueting Yi, Dewei Zhao
Biodegradable magnesium (Mg) materials are considered ideal as osteosynthesis implants. However, clinical application has proven complex. This is primarily associated with the issue of reducing the extent of implant degradation to a range acceptable for the human body, while simultaneously enhancing osteogenesis or osteoinduction. In the present study, a combination of Mg ions and low‑intensity pulsed ultrasound (LIPUS) treatment was applied in hFOB 1.19 human osteoblast cells as a potential strategy to resolve this issue...
May 11, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29766567/melatonin-attenuates-osteosarcoma-cell-invasion-by-suppression-of-c-c-motif-chemokine-ligand-24-through-inhibition-of-the-c-jun-n-terminal-kinase-pathway
#11
Ko-Hsiu Lu, Shih-Chi Su, Chiao-Wen Lin, Yi-Hsien Hsieh, Ya-Chiu Lin, Ming-Hsien Chien, Russel J Reiter, Shun-Fa Yang
Osteosarcoma, with its high metastatic potential, is the most prevalent malignant bone tumor in children and adolescents. Melatonin possesses multiple tumor-suppressing properties for a myriad of tumors, but little is known about the effects of melatonin on osteosarcoma metastasis. In this study, we demonstrated that melatonin elicited very low cytotoxicity and significantly inhibited cellular motility, migration, and invasion in human osteosarcoma U2OS and HOS cells. Moreover, using RNA sequencing technology, we revealed that melatonin repressed C-C motif chemokine ligand 24 (CCL24) gene expression in U2OS cells...
May 16, 2018: Journal of Pineal Research
https://www.readbyqxmd.com/read/29760914/gas-stunning-with-co-2-affected-meat-color-lipid-peroxidation-oxidative-stress-and-gene-expression-of-mitogen-activated-protein-kinases-glutathione-s-transferases-and-cu-zn-superoxide-dismutase-in-the-skeletal-muscles-of-broilers
#12
Lei Xu, Haijun Zhang, Hongyuan Yue, Shugeng Wu, Haiming Yang, Zhiyue Wang, Guanghai Qi
Background: Meat color and lipid peroxidation are important traits related to meat quality. CO2 concentration is a critical factor that can affect meat quality in the commercial use of gas stunning (GS). However, the effect and mechanism of CO2 stunning on meat color and lipid peroxidation during long-term storage remain poorly studied. We aimed to study the effects of GS methods, especially CO2 concentration, on meat color and meat lipid peroxidation in broilers during long-term storage at 4 °C and to explore the potential mechanism of meat color change via lipid peroxidation and the inner lipid peroxide scavenging system...
2018: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/29754474/oxymatrine-causes-hepatotoxicity-by-promoting-the-phosphorylation-of-jnk-and-induction-of-endoplasmic-reticulum-stress-mediated-by-ros-in-lo2-cells
#13
Li-Li Gu, Zhe-Lun Shen, Yang-Lei Li, Yi-Qi Bao, Hong Lu
Oxymatrine (OMT) often used in treatment for chronic hepatitis B virus infection in clinic. However, OMT-induced liver injury has been reported. In this study, we aim to investigate the possible mechanism of OMT-induced hepatotoxicity in human normal liver cells (L02). Exposed cells to OMT, the cell viability were decreased and apoptosis rate increased, the intracellular markers of oxidative stress were changed. Simultaneously, OMT altered apoptotic related proteins levels, including Bcl-2, Bax and pro-caspase-8/-9/-3...
May 10, 2018: Molecules and Cells
https://www.readbyqxmd.com/read/29753890/characterization-of-the-promoter-of-white-spot-syndrome-virus-immediate-early-gene-wsv249
#14
Zi Yang, Xiaomin Xu, Fang Li, Feng Yang
White spot syndrome virus immediate early (IE) gene wsv249 encodes an E3 ubiquitin ligase that can interact with a shrimp ubiquitin-conjugating enzyme to mediate ubiquitination. In this study, to understand the transcriptional regulation of wsv249, a serial of 5'-truncated mutations were made on its promoter and the activities of mutated promoters was analyzed. Four 25 bp regions potentially containing either positive or negative regulatory elements were identified. Notably, the deletion of -275/-250, which abolished a cAMP-response element (CRE), greatly reduced the promoter activity by 84...
May 10, 2018: Virus Research
https://www.readbyqxmd.com/read/29753785/lactoferrin-inhibits-aflatoxin-b1-and-aflatoxin-m1-induced-cytotoxicity-and-dna-damage-in-caco-2-hek-hep-g2-and-sk-n-sh-cells
#15
Nan Zheng, Huan Zhang, Songli Li, Jiaqi Wang, Jia Liu, Hui Ren, Yanan Gao
Aflatoxins, including aflatoxin B1 (AFB1 ) and M1 (AFM1 ), are natural potent carcinogens produced by Aspergillus spp. These compounds, which can often be detected in dairy foods, can cause diseases in human beings. However, the molecular mechanisms involved in cytotoxicity, as well as methods for intervention, remain largely unexplored. For example, it is unclear whether lactoferrin (LF), a major antioxidant in milk, can inhibit the cytotoxicity of AFB1 and AFM1 . In this study, we assessed AFB1 - and AFM1 -induced cell toxicity by measuring cell viability, membrane permeability, and genotoxicity, and then investigated the ability of LF to protect cells against AFB1 and AFM1 ...
May 10, 2018: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29753743/jlp-jnk-signaling-protects-cancer-cells-from-reactive-oxygen-species-induced-cell-death
#16
Rong Li, I Ketut Gunarta, Ryusuke Suzuki, Jambaldorj Boldbaatar, Ryota Nakazato, Dewi Yuliana, Gantulga Davaakhuu, Tsendsuren Oyunsuren, Nobuhiko Takamatsu, Masahiko Kobayashi, Atsushi Hirao, Katsuji Yoshioka
Oxidative stress, which can be caused by an overproduction of reactive oxygen species (ROS), often leads to cell death. In recent years, c-Jun NH2 -terminal kinase (JNK)-associated leucine zipper protein (JLP, also known as SPAG9 or JIP4), a scaffold protein for JNK mitogen-activated protein kinase (MAPK) signaling pathways, was found to serve as a novel biomarker for cancer. However, although JNK MAPK pathways are reported to be activated in response to various stimuli, including oxidative stress, whether JLP is involved in ROS signaling remains unknown...
May 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29752466/mir-5591-5p-regulates-the-effect-of-adscs-in-repairing-diabetic-wound-via-targeting-ages-ager-jnk-signaling-axis
#17
Qiang Li, Sizhan Xia, Yating Yin, Yanping Guo, Feifei Chen, Peisheng Jin
Advanced glycation end products/advanced glycation end products receptor (AGEs/AGER) interaction triggers reactive oxygen species (ROS) generation and activates downstream signal pathways and induces apoptosis in endothelial progenitor cells. A number of studies have revealed the involvement of microRNAs (miRNAs) in regulating intracellular ROS production and apoptosis. However, few studies explore the role of miRNAs in regulating the effect of adipose tissue-derived stem cells (ADSCs) in repairing diabetic wound and the associated cellular mechanisms remain unclear...
May 11, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29751779/essential-role-of-atp6ap2-enrichment-in-caveolae-lipid-raft-microdomains-for-the-induction-of-neuronal-differentiation-of-stem-cells
#18
Nehman Makdissy, Katia Haddad, Jeanne D'arc AlBacha, Diana Chaker, Bassel Ismail, Albert Azar, Ghada Oreibi, David Ayoub, Ibrahim Achkar, Didier Quilliot, Ziad Fajloun
BACKGROUND: The subcellular distribution of prorenin receptor and adaptor protein ATP6AP2 may affect neurogenesis. In this study, we hypothesized that ATP6AP2 expression and subcellular relocalization from caveolae/lipid raft microdomains (CLR-Ms) to intracellular sites may correlate with neuronal differentiation (Neu-Dif) of adipose-derived mesenchymal stem cells (ADSCs). METHODS: Human ADSCs isolated from 24 healthy donors and 24 patients with neurological disorders (ND) were cultured and induced for Neu-Dif...
May 11, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29751609/pterostilbene-and-4-methoxyresveratrol-inhibited-lipopolysaccharide-induced-inflammatory-response-in-raw264-7-macrophages
#19
Yun Yao, Kehai Liu, Yueliang Zhao, Xiaoqian Hu, Mingfu Wang
Pterostilbene (Pte) and 4′-Methoxyresveratrol (4MR) are methylated derivatives of resveratrol. We investigated the anti-inflammatory effect of Pte and 4MR in lipopolysaccharide (LPS)-stimulated RAW264.7 murine macrophages. Both Pte and 4MR significantly reduced LPS-induced nitric oxide release by inhibiting the inducible nitric oxide synthase mRNA expression. Moreover, both of them inhibited LPS-induced mRNA expression of inflammatory cytokines including monocyte chemoattractant protein (MCP)-1, interleukin (IL)-6 and IL-1β, and tumor necrosis factor α (TNF-α), and attenuated LPS-induced nuclear factor-κB (NF-κB) activation by decreasing p65 phosphorylation...
May 11, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29751034/a-novel-jnk-is-involved-in-immune-response-by-regulating-il-expression-in-oyster-crassostrea-gigas
#20
Jiejie Sun, Yinan Li, Meijia Li, Yu Liu, Chen Qu, Lingling Wang, Linsheng Song
The c-Jun N-terminal kinase (JNK) is a member of mitogen-activated protein kinases (MAPK) highly conserved from yeast to mammals and participates in regulating many physiological and pathological processes. In the present study, a novel JNK was identified from oyster Crassostrea gigas (designated as CgJNK) and its biological functions were investigated in response against lipopolysaccharide (LPS) injection. The CgJNK consists of 415 amino acids, which includes a serine/threonine protein kinase (S_TKc) domain with a conserved Thr-Pro-Tyr (TPY) motif...
May 8, 2018: Fish & Shellfish Immunology
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