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https://www.readbyqxmd.com/read/29331340/hsp72-protects-from-liver-injury-via-attenuation-of-hepatocellular-death-oxidative-stress-and-jnk-signaling
#1
Kateryna Levada, Nurdan Guldiken, Xiaoji Zhang, Giovanna Vella, Fa-Rong Mo, Laura P James, Johannes Haybaeck, Sonja M Kessler, Alexandra K Kiemer, Thomas Ott, Daniel Hartmann, Norbert Hüser, Marianne Ziol, Christian Trautwein, Pavel Strnad
BACKGROUND AND AIMS: Heat shock protein (Hsp) 72 is a molecular chaperone that is upregulated in response to stress and possesses broad cytoprotective functions. To determine its hepatic function, we studied its expression in human liver disorders and its biological significance in newly generated transgenic animals. AIM AND METHODS: Double transgenic mice overexpressing Hsp72 (gene HSPA1A) under the control of a tissue-specific tetracycline-inducible system (Hsp72-LAP mice) were produced...
January 10, 2018: Journal of Hepatology
https://www.readbyqxmd.com/read/29316840/protective-effect-of-motiliperm-in-varicocele-induced-oxidative-injury-in-rat-testis-by-activating-phosphorylated-inositol-requiring-kinase-1%C3%AE-p-ire1%C3%AE-and-phosphorylated-c-jun-n-terminal-kinase-p-jnk-pathways
#2
Kiran Kumar Soni, Li Tao Zhang, Bo Ram Choi, Keshab Kumar Karna, Jae Hyung You, Yu Seob Shin, Sung Won Lee, Chul Young Kim, Chen Zhao, Han-Jung Chae, Hye Kyung Kim, Jong Kwan Park
CONTEXT: MOTILIPERM was prepared as a mixture of extracts of three medicinal herbs [roots of Morinda officinalis How (Rubiaceae), outer scales of Allium cepa L. (Liliaceae) and seeds of Cuscuta chinensis Lamark (Convolvulaceae)]. OBJECTIVE: To investigate the role of reactive oxygen species (ROS)-based endoplasmic reticulum (ER) stress in a rat model of varicocele and the therapeutic efficacy of MOTILIPERM in this model. MATERIALS AND METHODS: Sixty male rats were divided into five experimental groups: a normal control group (CTR + vehicle), a control group administered MOTILIPERM 200 mg/kg (CTR + M 200), a varicocele-induced control group (VC + vehicle) and two varicocele-induced groups administered MOTILIPERM 100 (VC + M 100) or 200 (VC + M 200) mg/kg for 4 weeks...
December 2018: Pharmaceutical Biology
https://www.readbyqxmd.com/read/29278652/parp1-induces-cardiac-fibrosis-by-mediating-mtor-activity
#3
Shuya Sun, Yuehuai Hu, Qiyao Zheng, Zhen Guo, Duanping Sun, Shaorui Chen, Yiqiang Zhang, Peiqing Liu, Jing Lu, Jianmin Jiang
Cardiac fibrosis is involved in nearly all forms of heart diseases, and is characterized by excessive deposition of extracellular matrix (ECM) proteins by cardiac fibroblasts (CFs). We and others have reported the possibility of poly(ADP-ribose) polymerase 1 (PARP1), the founding subtype of the PARPs enzyme family, as a novel therapeutic target of heart diseases. The cardiac fibrotic induction of mTOR (mammalian target of rapamycin) is mainly due to collagen expression, Smad3 and p53/JNK-mediated apoptosis...
December 26, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29222028/sodium-butyrate-enhanced-physical-barrier-function-referring-to-nrf2-jnk-and-mlck-signaling-pathways-in-the-intestine-of-young-grass-carp-ctenopharyngodon-idella
#4
Pei Wu, Li Tian, Xiao-Qiu Zhou, Wei-Dan Jiang, Yang Liu, Jun Jiang, Fei Xie, Sheng-Yao Kuang, Ling Tang, Wu-Neng Tang, Juan Yang, Yong-An Zhang, He-Qun Shi, Lin Feng
This study evaluated the effect of dietary sodium butyrate (SB) supplementation on the intestinal physical barrier function of young grass carp (Ctenopharyngodon idella). The fish were fed one powdery sodium butyrate (PSB) diet (1000.0 mg kg-1 diet) and five graded levels of microencapsulated sodium butyrate (MSB) diets: 0.0 (control), 500.0, 1000.0, 1500.0 and 2000.0 mg kg-1 diet for 60 days. Subsequently, a challenge test was conducted by injection of Aeromonas hydrophila to explore the effect of SB supplementation on intestinal physical barrier function and the potential mechanisms in fish...
December 5, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29187900/the-cytotoxic-effects-of-dimethyl-sulfoxide-in-mouse-preimplantation-embryos-a-mechanistic-study
#5
Min-Hee Kang, Joydeep Das, Sangiliyandi Gurunathan, Hwan-Woo Park, Hyuk Song, Chankyu Park, Jin-Hoi Kim
Rationale: Dimethyl sulfoxide (DMSO) is commonly used as a solvent for water-insoluble substances, a vehicle for drug therapy, and a cryoprotectant for cultured cells. DMSO induced embryonic defects and its mechanism of action remains unclear. The rationale is based on the assumption that DMSO supplementation should induce long-term negative effects on both pre- and post-implantation embryo development. Methods: DMSO induced oxidative stress, ER stress, autophagy, mitophagy, signaling responsible genes and proteins were determined by RT-qPCR, Western blotting, immunofluorescence, and confocal microscopy...
2017: Theranostics
https://www.readbyqxmd.com/read/29184072/adrenomedullin-protects-leydig-cells-against-lipopolysaccharide-induced-oxidative-stress-and-inflammatory-reaction-via-mapk-nf-%C3%AE%C2%BAb-signalling-pathways
#6
Wei Hu, Lei Shi, Ming-Yong Li, Pang-Hu Zhou, Bo Qiu, Ke Yin, Hui-Hui Zhang, Yong Gao, Ran Kang, Song-Lin Qin, Jin-Zhuo Ning, Wei Wang, Li-Jun Zhang
This study aimed to explore the possible benefits of adrenomedullin (ADM) in preventing oxidative stress and inflammation by using an in vitro primary culture model of rat Leydig cells exposed to lipopolysaccharide (LPS). Cell proliferation was detected through CCK-8 and BrdU incorporation assays. ROS were determined with a DCFDA kit, and cytokine concentrations were measured with ELISA assay kits. Protein production was examined by immunohistochemical staining and Western blot, and gene expression was observed through RT-qPCR...
November 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29183244/sodium-butyrate-enhances-intestinal-integrity-inhibits-mast-cell-activation-inflammatory-mediator-production-and-jnk-signaling-pathway-in-weaned-pigs
#7
Chun Chun Wang, Huan Wu, Fang Hui Lin, Rong Gong, Fei Xie, Yan Peng, Jie Feng, Cai Hong Hu
The present study aimed to investigate the effects of sodium butyrate on the intestinal barrier and mast cell activation, as well as inflammatory mediator production, and determine whether mitogen-activated protein kinase signaling pathways are involved in these processes. A total of 72 piglets, weaned at 28 ± 1 d age, were allotted to two dietary treatments (control vs. 450 mg/kg sodium butyrate) for 2 wk. The results showed that supplemental sodium butyrate increased daily gain, improved intestinal morphology, as indicated by greater villus height and villus height:crypt depth ratio, and intestinal barrier function reflected by increased transepithelial electrical resistance and decreased paracellular flux of dextran (4 kDa)...
January 1, 2017: Innate Immunity
https://www.readbyqxmd.com/read/29107025/association-of-changes-in-er-stress-mediated-signaling-pathway-with-lead-induced-insulin-resistance-and-apoptosis-in-rats-and-their-prevention-by-a-type-dimeric-epigallocatechin-3-gallate
#8
Chan-Min Liu, Jie-Qiong Ma, Jian-Mei Sun, Zhao-Jun Feng, Chao Cheng, Wei Yang, Hong Jiang
A-type dimeric epigallocatechin-3-gallate (A-type-EGCG-dimer, AEd), a new proanthocyanidins dimer from persimmon fruits, has been shown to have health benefit effects. However, A-type-EGCG-dimer affects gluose metabolism in the liver and the underlying mechanism is not clarified. The present study aims to examine the protective effects of A-type-EGCG-dimer on Pb-induced hepatic insulin resistance, endoplasmic reticulum (ER) stress and apoptosis in rats. Male wistar rats exposed to 0.05% w/v Pb acetate in the drinking water with or without A-type-EGCG-dimer coadministration (200 mg/kg body weight/day, intragastrically) for three months...
October 27, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29093682/salidroside-a-natural-antioxidant-improves-%C3%AE-cell-survival-and-function-via-activating-ampk-pathway
#9
Linjie Ju, Xiaohua Wen, Chunjun Wang, Yingjie Wei, Yunru Peng, Yongfang Ding, Liang Feng, Luan Shu
Aim: The enhanced oxidative stress contributes to progression of type 2 diabetes mellitus (T2DM) and induces β-cell failure. Salidroside is a natural antioxidant extracted from medicinal food plant Rhodiola rosea. This study was aimed to evaluate protective effects of salidroside on β-cells against diabetes associated oxidative stress. Methods and Results: In diabetic db/db and high-fat diet-induced mice, we found salidroside ameliorated hyperglycemia and relieved oxidative stress. More importantly, salidroside increased β-cell mass and β-cell replication of diabetic mice...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29074535/flaxseed-consumption-inhibits-chemically-induced-lung-tumorigenesis-and-modulates-expression-of-phase-ii-enzymes-and-inflammatory-cytokines-in-a-j-mice
#10
Shireen Chikara, Sujan Mamidi, Avinash Sreedasyam, Kishore Chittem, Ralph Pietrofesa, Athena Zuppa, Ganesh Moorthy, Neil Dyer, Melpo Christofidou-Solomidou, Katie M Reindl
Flaxseed consumption is associated with reduced oxidative stress and inflammation in lung injury models, and has shown anti-cancer effects for breast and prostate tissues. However, the chemopreventive potential of flaxseed remains unexplored for lung cancer. In this study, we investigated the effect of flaxseed on tobacco smoke carcinogen (NNK)-induced lung tumorigenesis in an A/J mouse model. Mice exposed to NNK were fed a control diet or a 10% flaxseed-supplemented diet for 26 weeks. Flaxseed-fed mice showed reduced lung tumor incidence (78%) and multiplicity, with an average of 2...
October 26, 2017: Cancer Prevention Research
https://www.readbyqxmd.com/read/29037328/xyloglucan-intake-attenuates-myocardial-injury-by-inhibiting-apoptosis-and-improving-energy-metabolism-in-a-rat-model-of-myocardial-infarction
#11
Sun Ha Lim, Jongwon Lee
The development of coronary heart disease can be divided into preocclusion and postocclusion steps. We previously showed that cell wall polysaccharides consisting of a high content of arabinose and/or xylose, such as apple pectin, protected against myocardial injury by inhibiting postocclusion steps. We hypothesized that xyloglucan, another apple cell wall polysaccharide that consists of a high content of xylose, might also show myocardial protection. To test the hypothesis, rats were supplemented with either tamarind xyloglucan (TXG) (1, 10, and 100 mg/kg per day) or cotton cellulose (CCL) (100mg/kg per day) for 3 days...
September 2017: Nutrition Research
https://www.readbyqxmd.com/read/29034730/corydaline-inhibits-enterovirus-71-replication-by-regulating-cox-2-expression
#12
Hui-Qiang Wang, Jin Hu, Hai-Yan Yan, Shuo Wu, Yu-Huan Li
Enterovirus 71 (EV71) is a huge threat to the worldwide public health and there is no approved antiviral drug for EV71-induced disease therapy. Corydaline exists antiallergic and antinociceptive activities, but the anti-EV71 activity of corydaline is still not reported. In this study, corydaline could suppress the expression of viral structural and non-structural proteins. Furthermore, corydaline inhibits EV71 replication by suppressing the COX-2 expression and the phosphorylation of JNK MAPK and P38 MAPK but not ERK MAPK in vitro...
October 15, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/29018453/inulin-type-fructans-modulates-pancreatic-gut-innate-immune-responses-and-gut-barrier-integrity-during-experimental-acute-pancreatitis-in-a-chain-length-dependent-manner
#13
Yue He, Chengfei Wu, Jiahong Li, Hongli Li, Zhenghua Sun, Hao Zhang, Paul de Vos, Li-Long Pan, Jia Sun
Acute pancreatitis (AP) is a common abdominal inflammatory disorder and one of the leading causes of hospital admission for gastrointestinal disorders. No specific pharmacological or nutritional therapy is available but highly needed. Inulin-type fructans (ITFs) are capable of modifying gut immune and barrier homeostasis in a chemistry-dependent manner and hence potentially applicable for managing AP, but their efficacy in AP has not been demonstrated yet. The current study aimed to examine and compare modulatory effects of ITFs with different degrees of fermentability on pancreatic-gut immunity and barrier function during experimentally induced AP in mice...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29017174/cardiac-remodeling-induced-by-all-trans-retinoic-acid-is-detrimental-in-normal-rats
#14
Renata A C Silva, Andréa F Gonçalves, Priscila P Dos Santos, Bruna Rafacho, Renan F T Claro, Marcos F Minicucci, Paula S Azevedo, Bertha F Polegato, Silméia G Zanati, Ana Angélica Fernandes, Sergio A R Paiva, Leonardo A M Zornoff
BACKGROUND/AIMS: This study aimed to discern whether the cardiac alterations caused by retinoic acid (RA) in normal adult rats are physiologic or pathologic. METHODS AND RESULTS: Wistar rats were assigned into four groups: control animals (C, n = 20) received a standard rat chow; animals fed a diet supplemented with 0.3 mg/kg/day all-trans-RA (AR1, n = 20); animals fed a diet supplemented with 5 mg/kg/day all-trans-RA (AR2, n = 20); and animals fed a diet supplemented with 10 mg/kg/day all-trans-RA (AR3, n = 20)...
2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28935193/celastrol-inhibits-hepatitis-c-virus-replication-by-upregulating-heme-oxygenase-1-via-the-jnk-mapk-nrf2-pathway-in-human-hepatoma-cells
#15
Chin-Kai Tseng, Sung-Po Hsu, Chun-Kuang Lin, Yu-Hsuan Wu, Jin-Ching Lee, Kung-Chia Young
BACKGROUND AND PURPOSE: Celastrol, a quinone methide triterpene isolated from the root extracts of Tripterygium wilfordii, can greatly induce the gene expression activity of heme oxygenase-1 (HO-1) to achieve disease prevention and control. HO-1 induction was recently shown to result in anti-HCV activity by inducing type I interferon and inhibiting hepatitis C virus (HCV) NS3/4A protease activity. The aim of the present study is to evaluate the anti-HCV activity of celastrol and characterize its mechanism of inhibition...
September 19, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28916723/fibroblast-growth-factor-2-fgf2-regulates-cytoglobin-expression-and-activation-of-human-hepatic-stellate-cells-via-jnk-signaling
#16
Misako Sato-Matsubara, Tsutomu Matsubara, Atsuko Daikoku, Yoshinori Okina, Lisa Longato, Krista Rombouts, Le Thi Thanh Thuy, Jun Adachi, Takeshi Tomonaga, Kazuo Ikeda, Katsutoshi Yoshizato, Massimo Pinzani, Norifumi Kawada
Cytoglobin (CYGB) belongs to the mammalian globin family and is exclusively expressed in hepatic stellate cells (HSCs) in the liver. In addition to its gas-binding ability, CYGB is relevant to hepatic inflammation, fibrosis, and cancer because of its antioxidative properties; however, the regulation of CYGB gene expression remains unknown. Here, we sought to identify factors that induce CYGB expression in HSCs and to clarify the molecular mechanism involved. We used the human HSC cell line HHSteC and primary human HSCs isolated from intact human liver tissues...
September 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28899582/fgf2-mediated-attenuation-of-myofibroblast-activation-is-modulated-by-distinct-mapk-signaling-pathways-in-human-dermal-fibroblasts
#17
David M Dolivo, Sara A Larson, Tanja Dominko
BACKGROUND: Previous human and animal studies have demonstrated the ability of exogenously administered basic fibroblast growth factor (FGF2) to act as an antifibrotic agent in the skin. Though the activity of FGF2 as an anti-scarring agent is well-established for fibrotic skin wounds, the mechanisms by which FGF2 exerts these actions are not entirely understood. Canonical FGF2 signaling proceeds in part via FGFR/MAPK pathways in human dermal fibroblasts, and FGF2 has been described to prevent or reverse the fibroblast-to-myofibroblast transition, which is driven by TGFβ signaling and understood to be an important step in the formation of a fibrotic scar in vivo...
September 1, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28799756/caffeic-acid-phenethyl-ester-propolis-extract-ameliorates-insulin-resistance-by-inhibiting-jnk-and-nf-%C3%AE%C2%BAb-inflammatory-pathways-in-diabetic-mice-and-hepg2-cell-models
#18
Jiarui Nie, Yaning Chang, Yujia Li, Yingjun Zhou, Jiawen Qin, Zhen Sun, Haibin Li
Caffeic acid phenethyl ester (CAPE), extracted from propolis, was evaluated for the ameliorative effects on insulin resistance and the mechanisms were identified, using non-insulin-dependent diabetes mellitus (NIDDM) model mice and insulin resistance (IR) model cells. After 5 weeks of CAPE supplementation, insulin sensitivity, hyperlipidemia, and peroxisome proliferator-activated receptor-α (PPAR-α) levels were improved in mice. Proinflammatory cytokines in serum and the expressions of tumor necrosis factor-alpha (TNF-α) mRNA in tissues were markedly downregulated from CAPE-treated mice...
October 5, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28769771/upregulation-of-matrix-metalloproteinase-9-in-primary-cultured-rat-astrocytes-induced-by-2-chloroethanol-via-mapk-signal-pathways
#19
Tong Wang, Yingjun Liao, Qi Sun, Hongge Tang, Gaoyang Wang, Fenghong Zhao, Yaping Jin
2-Chloroethanol (2-CE) is one of the reactive metabolites of 1,2-DCE in vivo, which might contribute to brain edema formation induced by 1,2-dichloroethane (1,2-DCE) poisoning. Thus, the purpose of this study was to explore the roles of mitogen-activated protein kinase (MAPK) signal pathways in upregulation of matrix metalloproteinase-9 (MMP-9) in 2-CE exposed rat astrocytes. Expression of p38 MAPK (p38), extracellular signal regulated protein kinase (ERK), c-Jun N-terminal kinase (JNK) and MMP-9 at both protein and gene levels in rat astrocytes were determined using western blot and real-time RT-PCR methods...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28689355/vitamin-d3-reverses-the-hippocampal-cytoskeleton-imbalance-but-not-memory-deficits-caused-by-ovariectomy-in-adult-wistar-rats
#20
Cassiana Siebert, Paula Pierozan, Janaina Kolling, Tiago Marcon Dos Santos, Matheus Coimbra Sebotaio, Eduardo Peil Marques, Helena Biasibetti, Aline Longoni, Fernanda Ferreira, Regina Pessoa-Pureur, Carlos Alexandre Netto, Angela T S Wyse
The objective of study was to investigate changes caused by ovariectomy (OVX) on aversive and non-aversive memories, as well as on cytoskeleton phosphorylating system and on vitamin D receptor (VDR) immunocontent in hippocampus. The neuroprotective role of vitamin D was also investigated. Ninety-day-old female Wistar rats were divided into four groups: SHAM, OVX, VITAMIN D and OVX + VITAMIN D; 30 days after the OVX, vitamin D supplementation (500 IU/kg), by gavage, for 30 days was started. Results showed that OVX impaired short-term and long-term recognition, and long-term aversive memories...
September 2017: Neuromolecular Medicine
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