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https://www.readbyqxmd.com/read/28718669/fruit-peel-polyphenolic-extract-induced-apoptosis-in-human-breast-cancer-cells-is-associated-with-ros-production-and-modulation-of-p38mapk-erk1-2-and-the-akt-signaling-pathway
#1
Martin Kello, Lucia Kulikova, Janka Vaskova, Alexandra Nagyova, Jan Mojzis
Polyphenols represent a large group of natural substances with different biological properties. Currently, polyphenols are well studied due to their free radicals' scavenging and antioxidant activities. However, some studies indicate that polyphenols also exhibit pro-oxidant properties. In this study, the possible involvement of the pro-oxidant activities of fruit polyphenols was investigated in relation to apoptosis induction. To determine the type of cell death induced by fruit polyphenols (Flavine; F7), we assessed a series of assays, including measurements of caspase-7 activation, membrane mitochondrial potential changes, reactive oxygen (ROS) and nitrogen species production, lipid peroxidation, antioxidant enzymes activities, and PARP cleavage...
July 18, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28713990/inhibition-of-p38mapk-potentiates-mesenchymal-stem-cell-therapy-against-myocardial-infarction-injury-in-rats
#2
Zhiling Zhang, Shulan Zhou, Zhiliang Mei, Ming Zhang
The present study aimed to investigate the protective effect of mesenchymal stem cell (MSC) therapy in combination with p38 mitogen‑activated protein (MAPK) inhibition against myocardial infarction (MI) injury in rats, and to elucidate the underlying mechanisms. An MI model was established by ligation of the anterior descending branch of the left coronary artery. The rats were divided into four groups: MSC transplantation, p38MAPK inhibitor (SB203580), MSC + SB203580 and model control group. HE staining and a TUNEL assay were performed to evaluate pathological changes and apoptosis...
July 14, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28713949/shikonin-suppresses-proliferation-and-induces-apoptosis-in-human-leukemia-nb4-cells-through-modulation-of-mapks-and-c%C3%A2-myc
#3
Zhi-Ling Shan, Liang Zhong, Chu-Lan Xiao, Liu-Gen Gan, Ting Xu, Hao Song, Rong Yang, Liu Li, Bei-Zhong Liu
Acute promyelocytic leukemia (APL) is a special subtype of acute myeloid leukemia that responds to treatment with all‑trans retinoic acid and arsenic trioxide. However, severe side effects and drug resistance limit the effectiveness of these treatments. Hence, new drugs for APL are required urgently. Shikonin, an active naphthoquinone derived from the Chinese medical herb Zi Cao exerts antitumor activity in several cancers. In the present study, the effects of shikonin on proliferation and apoptosis in NB4 cells, as well as related mechanisms were assessed...
July 13, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28706944/schisandrin-b-prevents-hind-limb-from-ischemia-reperfusion-induced-oxidative-stress-and-inflammation-via-mapk-nf-%C3%AE%C2%BAb-pathways-in-rats
#4
Ning Zhu, Changhong Cai, Aiming Zhou, Xuyong Zhao, Yijia Xiang, Chunlai Zeng
Schisandrin B (ScB), isolated from Schisandra chinensis (S. chinensis), is a traditional Chinese medicine with proven cardioprotective and neuroprotective effects. However, it is unclear whether ScB also has beneficial effects on rat hind limb ischemia/reperfusion (I/R) injury model. In this study, ScB (20 mg/kg, 40 mg/kg, and 80 mg/kg) was administered via oral gavage once daily for 5 days before the surgery. After 6 h ischemia and 24 h reperfusion of left hind limb, ScB reduced I/R induced histological changes and edema...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28706147/tumor-p38mapk-signaling-enhances-breast-carcinoma-vascularization-and-growth-by-promoting-expression-and-deposition-of-pro-tumorigenic-factors
#5
Michelle Limoge, Alfiya Safina, Alexander M Truskinovsky, Ieman Aljahdali, Justin Zonneville, Aleksandar Gruevski, Carlos L Arteaga, Andrei V Bakin
The breast carcinoma microenvironment strikingly influences cancer progression and response to therapy. Various cell types in the carcinoma microenvironment show significant activity of p38 mitogen-activated protein kinase (MAPK), although the role of p38MAPK in breast cancer progression is still poorly understood. The present study examined the contribution of tumor p38MAPK to breast carcinoma microenvironment and metastatic capacity. Inactivation of p38MAPK signaling in metastatic breast carcinoma cells was achieved by forced expression of the kinase-inactive mutant of p38/MAPK14 (a dominant-negative p38, dn-p38)...
June 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28704484/apoptosis-by-pt-o-o-acac-%C3%AE-acac-dms-requires-pkc-%C3%AE-mediated-p53-activation-in-malignant-pleural-mesothelioma
#6
Antonella Muscella, Carla Vetrugno, Luca Giulio Cossa, Giovanna Antonaci, Amilcare Barca, Sandra Angelica De Pascali, Francesco Paolo Fanizzi, Santo Marsigliante
Mesothelioma cancer cells have epithelioid or sarcomatoid morphology. The worst prognosis is associated with sarcomatoid phenotype and resistance to therapy is affected by cells heterogeneity. We recently showed that in ZL55 mesothelioma cell line of epithelioid origin [Pt(O,O'-acac)(γ-acac)(DMS)] (Ptac2S) has an antiproliferative effect in vitro and in vivo. Aim of this work was to extend the study on the effects of Ptac2S on ZL34 cell line, representative of sarcomatoid mesothelioma. ZL34 cells were used to assay the antitumor activity of Ptac2S in a mouse xenograft model in vivo...
2017: PloS One
https://www.readbyqxmd.com/read/28699682/2-3-7-8-tetrachlorodibenzo-p-dioxin-promotes-endothelial-cell-apoptosis-through-activation-of-ep3-p38mapk-bcl-2-pathway
#7
Yu Yu, Qian Liu, Shumin Guo, Qianqian Zhang, Juan Tang, Guizhu Liu, Deping Kong, Juanjuan Li, Shuai Yan, Ruiguo Wang, Peilong Wang, Xiaoou Su, Ying Yu
Endothelial injury or dysfunction is an early event in the pathogenesis of atherosclerosis. Epidemiological and animal studies have shown that 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin (TCDD) exposure increases morbidity and mortality from chronic cardiovascular diseases, including atherosclerosis. However, whether or how TCDD exposure causes endothelial injury or dysfunction remains largely unknown. Cultured human umbilical vein endothelial cells (HUVECs) were exposed to different doses of TCDD, and cell apoptosis was examined...
July 12, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28694783/mpa-modulates-tight-junctions-permeability-via-midkine-pi3k-pathway-in-caco-2-cells-a-possible-mechanism-of-leak-flux-diarrhea-in-organ-transplanted-patients
#8
Niamat Khan, Lutz Binder, D V Krishna Pantakani, Abdul R Asif
Mycophenolic acid (MPA) is prescribed to prevent allograft rejection in organ transplanted patients. However, its use is sporadically linked to leak flux diarrhea and other gastrointestinal (GI) disturbances in around 75% of patients through yet unknown mechanisms. Recently, we identified Midkine as a modulator of tight junctions (TJs) permeability in MPA treated Caco-2 monolayer. In the present study, we investigated the possible involvement of Midkine dependent PI3K pathway in alteration of TJs under MPA treatment...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28694515/physical-binding-of-endothelial-mcam-and-neural-transmembrane-protease-matriptase-novel-cell-adhesion-in-neural-stem-cell-vascular-niche
#9
Hsiu-Hui Tung, Sheau-Ling Lee
Brain neural stem cells and transit amplifying cells in the subventricular zone (SVZ) of the lateral ventricles are in direct contact with the microvascular endothelium. The mechanisms/molecules of direct cell contact in the SVZ neurovascular niche are not fully understood. We previously showed that neural stem/progenitor (NS/P) cells induce brain endothelial signaling in direct cell contact through matriptase (MTP) on NS/P cell surface. In the present study, using pull-down and LC-MS/MS, we identified melanoma cell adhesion molecule (MCAM) the brain endothelial molecule that interacts with MTP...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28691026/quercetin-attenuates-vascular-calcification-through-suppressed-oxidative-stress-in-adenine-induced-chronic-renal-failure-rats
#10
Xue-Ying Chang, Lei Cui, Xing-Zhi Wang, Lei Zhang, Dan Zhu, Xiao-Rong Zhou, Li-Rong Hao
BACKGROUND: This study investigated whether quercetin could alleviate vascular calcification in experimental chronic renal failure rats induced by adenine. METHODS: 32 adult male Wistar rats were randomly divided into 4 groups fed normal diet, normal diet with quercetin supplementation (25 mg/kg·BW/d), 0.75% adenine diet, or adenine diet with quercetin supplementation. All rats were sacrificed after 6 weeks of intervention. Serum renal functions biomarkers and oxidative stress biomarkers were measured and status of vascular calcification in aorta was assessed...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28686347/epo-modified-mscs-can-inhibit-asthmatic-airway-remodeling-in-an-animal-model
#11
Xin-Peng Han, Fang-Qi Zhang, Xiang-Shu Tan, Liang Liu, Wen-Xian Ma, Hai-Feng Ou-Yang, Chang-Gui Wu
OBJECTIVE: There was no effective measures can be obtained at present to reverse or prevent airway remodeling. We investigated the therapeutic effect of Erythropoietin (EPO) gene modified mesenchymal stem cells (MSCs) on asthmatic airway remodeling and the possible underlied molecular mechanisms. METHODS: EPO gene was transfected into MSCs via lentivirus vector. The transfected cells (EPO-MSCs) were identi?ed by ?ow cytometry and the EPO secreting function was detected by PCR and western blot...
July 7, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28684422/curcumin-shifts-ras-induced-pro-proliferative-mek-erk-signaling-toward-pro-apoptotic-p38mapk-jnk1-signaling-triggering-p53-activation-and-apoptosis
#12
Shuvomoy Banerjee, Pushpak Bhattacharjee, Juni Chakraborty, Abir K Panda, Arnab Bandyopadhyay, Suman K Banik, Gaurisankar Sa
Oncogenic RAS is primarily associated with potent mitogenic ability, and RAS mutants also have an apoptogenic activity, which is poorly understood. Therefore, exploring the signaling circuit that shifts RAS-signals from pro-proliferative to death pathways may provide some molecular clues to the missing link between the mitogenic and apoptogenic mechanisms. Here, we used a systems biology approach exploiting microarray data and employing a mathematical model to better understand the dual role of oncogenic RAS This approach revealed that a curcumin-based intervention shifts the oncogenic RAS-induced MEK/ERK pro-proliferative pathway toward p38MAPK/JNK1 pro-death signaling...
July 6, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28682953/role-of-sigma-1-receptor-p38-mapk-inhibition-in-acupoint-catgut-embedding-mediated-analgesic-effects-in-complete-freund-s-adjuvant-induced-inflammatory-pain
#13
Kairong Du, Xue Wang, Laiting Chi, Wenzhi Li
BACKGROUND: The endoplasmic reticulum chaperone protein Sigma-1 receptor (Sig-1 R) and mitogen-activated protein kinases (MAPKs) are involved in the mechanism of pain. Acupoint stimulation exerts an exact antihyperalgesic effect in inflammatory pain. However, whether Sig-1 R and MAPKs are associated with the acupoint stimulation-induced analgesic effects is not clear. This study investigated the analgesic effect of acupoint catgut embedding (ACE) and the inhibition of Sig-1 R and MAPKs in ACE analgesia...
July 4, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28676338/dyrk2-involved-in-regulating-lps-induced-neuronal-apoptosis
#14
Yuxiang Sun, Xin Ge, Mengmeng Li, Li Xu, Yaodong Shen
The activation of relevant signaling pathways plays a very important role in LPS-induced neuronal damage. Dual-specificity tyrosine-phosphorylation-regulated kinase 2(Dyrk2), as a phosphokinase that can directly or indirectly phosphorylate signal molecules, was recently reported to down-regulate Type I Interferon(TIF) by promoting ser527 phosphorylation of TBK1. To further investigate the role of Dyrk2 in neuroinflammation, we for the first time focused on its function in LPS-induced neuronal damage. We found LPS stimulation increased the expression of Dyrk2 in the nucleus and cytoplasm of neurons...
July 1, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28674178/ccl5-promotes-resolution-phase-macrophage-reprogramming-in-concert-with-the-atypical-chemokine-receptor-d6-and-apoptotic-polymorphonuclear-cells
#15
Miran Aswad, Simaan Assi, Sagie Schif-Zuck, Amiram Ariel
The engulfment of apoptotic polymorphonuclear cells (PMN) during the resolution of inflammation leads to macrophage reprogramming culminating in reduced proinflammatory and increased anti-inflammatory mediator secretion. The atypical chemokine receptor D6/ACKR2 is expressed on apoptotic PMN and plays an important role in regulating macrophage properties during and after engulfment. In this study, we found that the inflammatory chemokine CCL5 is mostly retained (75%) during the resolution of zymosan A peritonitis in mice...
July 3, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28668500/toll-like-receptor-4-p38-mapk-signaling-in-the-dorsal-horn-contributes-to-p2x4-receptor-activation-and-bdnf-over-secretion-in-cancer-induced-bone-pain
#16
Xiao-Wen Meng, Jian-Ling Gao, Jian-Ling Zuo, Li-Na Wang, Si-Lan Liu, Xiao-Hong Jin, Ming Yao, Michael Namaka
Our previous research suggested that the P2X4 receptor (P2X4R) expression in microglia was involved in the activation of toll-like receptor-4 (TLR4) in the dorsal horn in the rat model of cancer induced bone pain (CIBP). In this study, we focused on whether TLR4- mitogen-activated protein kinases, p38 (p38 MAPK) contributes to P2X4R activation and brain-derived neurotrophic factor (BDNF) over-secretion in CIBP. In in vitro experiment, the results showed that BDNF expression evoked by ATP stimulation was dependent on TLR4-p38...
June 28, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28662498/modulation-of-oxidative-stress-by-17-%C3%AE-estradiol-and-genistein-in-human-hepatic-cell-lines-in-vitro
#17
Daniela Surico, Alfredo Ercoli, Serena Farruggio, Giulia Raina, Davide Filippini, David Mary, Rosalba Minisini, Nicola Surico, Mario Pirisi, Elena Grossini
BACKGROUND/AIMS: estrogens and phytoestrogens exert hepatoprotection through mechanisms not clearly examined yet. Here, we investigated the protective effects exerted by 17β-estradiol and genistein against oxidative stress in hepatocytes and hepatic stellate cells (HSCs) and the involvement of specific receptors and the intracellular signalling. METHODS: Huh7.5 and LX-2, alone or in co-culture with Huh7.5, were treated with 17β-estradiol and genistein alone or in the presence of menadione and of estrogen receptors (ERs) and G protein-coupled-estrogenic-receptors (GPER) blockers...
June 28, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28662394/omega-3-polyunsaturated-fatty-acids-improve-the-antioxidative-defense-in-rat-astrocytes-via-an-nrf2-dependent-mechanism
#18
Emilia Zgórzyńska, Barbara Dziedzic, Anna Gorzkiewicz, Dawid Stulczewski, Katarzyna Bielawska, Kuan-Pin Su, Anna Walczewska
INTRODUCTION: Neuronal tolerance to hypoxia and nutrient defficiency highly depends on GSH levels and antioxidant enzyme activity in astrocytes. Omega-3 polyunsaturated fatty acids (ω-3PUFA) enhance antioxidant defence in different cells. The aim of present study was to investigate if ω-3PUFA improve antioxidant status in astrocytes. METHODS: Rat primary astrocytes were incubated for 24h with DHA and EPA (30μM), then lysed, fractioned and fatty acids were determined by gas chromatography...
April 20, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28657795/p38-mapk-inhibition-improves-heart-function-in-pressure-loaded-right-ventricular-hypertrophy
#19
Baktybek Kojonazarov, Tatyana Novoyatleva, Mario Boehm, Chris Happe, Zaneta Sibinska, Xia Tian, Amna Sajjad, Himal Luitel, Guido Posern, Steven M Evans, Friedrich Grimminger, Hossein A Ghofrani, Norbert Weissmann, Harm J Bogaard, Werner Seeger, Ralph T Schermuly
While p38 MAPK is known to have a role in ischemic heart disease and many other diseases, its contribution to the pathobiology of right ventricular (RV) hypertrophy and failure is unclear. Therefore, we sought to investigate the role of p38 MAPK to the pathophysiology of pressure overload-induced RV hypertrophy and failure. Measurements and Main Results The effects of the p38 MAPK inhibitor PH797804 were investigated in mice with RV hypertrophy/failure caused by exposure to hypoxia or pulmonary artery banding (PAB); in addition, the effects of p38 MAPK inhibition or depletion (by small interfering RNA) were studied in isolated mouse RV fibroblasts...
June 28, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28656293/anti-proliferation-and-anti-metastasis-effect-of-barbaloin-in-non-small-cell-lung-cancer-via-inactivating-p38mapk-cdc25b-hsp27-pathway
#20
Zhang Zhang, Wei Rui, Zi-Chen Wang, Da-Xin Liu, Lin Du
Non-small cell lung carcinoma (NSCLC) is the most common lung cancer with high morbidity and mortality. The traditional treatment for NSCLC is particularly liable to relapse with many side-effects. Barbaloin is a natural compound with anticancer efficacy. The present study aimed to investigate the anticancer potential of barbaloin in NSCLC. The results displayed that barbaloin inhibited the viability of A549 cells by decreasing cell growth and the expression level of Ki-67 and proliferating cell nuclear antigen (PCNA), especially at high concentrations (50 and 100 µM)...
June 27, 2017: Oncology Reports
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