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https://www.readbyqxmd.com/read/28805378/in-vitro-modulation-of-renin-angiotensin-system-enzymes-by-amaranth-amaranthus-hypochondriacus-protein-derived-peptides-alternative-mechanisms-different-from-ace-inhibition
#1
Alejandra V Quiroga, Paula Aphalo, Agustina Estefanía Nardo, María Cristina Añón
Among the factors affecting the development of cardiovascular diseases, hypertension is one of the most important. Research done on amaranth proteins has demonstrated their hypotensive capacity in vivo and in vitro; nevertheless the mechanism underlying this effect remains unclear. The aim of this study was to analyze in vitro the inhibition of peptides derived from an amaranth hydrolysate (AHH) on other RAS enzymes other than ACE. The chymase and renin activities were studied. AHH was not able to inhibit chymase activity although a dose-response effect was found on renin activity (IC50 0...
August 14, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28803608/identification-of-simvastatin-regulated-targets-associated-with-jnk-activation-in-du145-human-prostate-cancer-cell-death-signaling
#2
Eun Joo Jung, Ky Hyun Chung, Choong Won Kim
In this study, our results showed that the c-Jun N-terminal kinase (JNK) activation was associated with the enhancement of docetaxel-induced cytotoxicity by simvastatin in DU145 human prostate cancer cells. To better understand the basic molecular mechanisms, we investigated simvastatin-regulated targets during simvastatin-induced cell death in DU145 cells using two-dimensional (2D) proteomic analysis. Thus, vimentin, Ras-related protein Rab-1B (RAB1B), cytoplasmic hydroxymethylglutaryl-CoA synthase (cHMGCS), thioredoxin domain-containing protein 5 (TXNDC5), heterogeneous nuclear ribonucleoprotein K (hnRNP K), N-myc downstream-regulated gene 1 (NDRG1) and isopentenyl-diphosphate Delta-isomerase 1 (IDI1) protein spots were identified as simvastatin-regulated targets involved in DU145 cell death signaling pathways...
August 11, 2017: BMB Reports
https://www.readbyqxmd.com/read/28800132/sphingolipid-accumulation-causes-mitochondrial-dysregulation-and-cell-death
#3
Jeffrey Knupp, Fernando Martinez-Montañés, Francoise Van Den Bergh, Stephanie Cottier, Roger Schneiter, Daniel Beard, Amy Chang
Sphingolipids are structural components of cell membranes that have signaling roles to regulate many activities, including mitochondrial function and cell death. Sphingolipid metabolism is integrated with numerous metabolic networks, and dysregulated sphingolipid metabolism is associated with disease. Here, we describe a monogenic yeast model for sphingolipid accumulation. A csg2Δ mutant cannot readily metabolize and accumulates the complex sphingolipid inositol phosphorylceramide (IPC). In these cells, aberrant activation of Ras GTPase is IPC-dependent, and accompanied by increased mitochondrial reactive oxygen species (ROS) and reduced mitochondrial mass...
August 11, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28798331/microrna-132-promotes-fibroblast-migration-via-regulating-ras-p21-protein-activator-1-in-skin-wound-healing
#4
Xi Li, Dongqing Li, Jakob D Wikström, Andor Pivarcsi, Enikö Sonkoly, Mona Ståhle, Ning Xu Landén
MicroRNA (miR)-132 has been identified as a top up-regulated miRNA during skin wound healing and its inhibition impairs wound repair. In a human in vivo surgical wound model, we showed that miR-132 was induced in epidermal as well as in dermal wound-edge compartments during healing. Moreover, in a panel of cells isolated from human skin wounds, miR-132 was found highly expressed in human dermal fibroblasts (HDFs). In HDFs, miR-132 expression was upregulated by TGF-β1. By overexpression or inhibition of miR-132, we showed that miR-132 promoted HDF migration...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28797632/association-of-angiotensin-ii-levels-with-albuminuria-in-subjects-with-normal-glucose-metabolism-prediabetes-and-type-2-diabetes-mellitus
#5
Se Hee Min, Sung Hye Kong, Jie-Eun Lee, Dong-Hwa Lee, Tae Jung Oh, Kyoung Min Kim, Kyong Soo Park, Hak Chul Jang, Soo Lim
OBJECTIVES: The relationship between the renin-angiotensin system (RAS) and diabetes has been studied for many years. However, studies that assessed RAS components comprehensively were limited. We hypothesized that serum RAS components, especially the effector peptide angiotensin-II, might be closely associated with glucose metabolism status and diabetic complications. METHODS: We investigated the association of individual RAS component with albuminuria in 407 subjects with normal glucose metabolism (NGM), prediabetes, or type 2 diabetes mellitus (T2DM)...
July 6, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28797105/regulation-of-hepatic-stellate-cell-proliferation-and-activation-by-glutamine-metabolism
#6
Jiang Li, Mohammed Ghazwani, Ke Liu, Yixian Huang, Na Chang, Jie Fan, Fengtian He, Liying Li, Shizhong Bu, Wen Xie, Xiaochao Ma, Song Li
Liver fibrosis is the excessive accumulation of extracellular matrix proteins, which is mainly caused by accumulation of activated hepatic stellate cells (HSCs). The mechanisms of activation and proliferation of HSCs, two key events after liver damage, have been studied for many years. Here we report a novel pathway to control HSCs by regulating glutamine metabolism. We demonstrated that the proliferation of HSCs is critically dependent on glutamine that is used to generate α-ketoglutarate (α-KG) and non-essential amino acid (NEAA)...
2017: PloS One
https://www.readbyqxmd.com/read/28794404/role-of-epithelial-cell-transforming-sequence-2-ect2-in-predicting-prognosis-of-osteosarcoma
#7
Zhiguo Chen, Jiatian Liu, Yihang Zhang
BACKGROUND Osteosarcoma is a major bone malignancy in children and young adults, and it is highly heterogeneous. The clinical outcome of osteosarcoma is individual-dependent due to different genetic and pathological profiles. Although chemotherapy in combination with surgery has significantly improved the survival of localized disease, the prognostic improvement for metastatic patients is less marked. ECT2 (epithelial cell transforming sequence 2) is a transforming protein that can interact with Rho-like proteins of the Ras family and has been proven as an ontogenetic protein in cancer cell lines...
August 10, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28791402/role-of-the-ace2%C3%A2-ang%C3%A2-1%C3%A2-7-%C3%A2-mas-axis-in-blood-pressure-regulation-and-its-potential-as-an-antihypertensive-in-functional-foods-review
#8
Shiqi Lin, Huanglei Pan, Hongli Wu, Difeng Ren, Jun Lu
The renin‑angiotensin system (RAS) serves a critical role in blood pressure regulation and prevention of cardiovascular diseases. Efforts to develop functional foods that enhance the RAS have focused on inhibition of angiotensin‑converting enzyme (ACE) activity in the ACE‑angiotensin II (Ang II)‑Ang II type 1 receptor axis. ACE2 and the Mas receptor are important components of this axis. ACE2 catalyzes Ang II into Ang‑(1‑7), which then binds to the G‑protein‑coupled receptor Mas. In addition, it induces nitric oxide release from endothelial cells and exerts antiproliferative, vasodilatory and antihypertensive effects...
August 4, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28791377/c%C3%A2-maf-inducing-protein-inhibits-cofilin%C3%A2-1-activity-and-alters-podocyte-cytoskeleton-organization
#9
Lixia Yu, Jianming Ye, Qifeng Liu, Jianhua Feng, Xiaoxia Gu, Qiang Sun, Guoyuan Lu
The glomerular visceral epithelial cells, also termed podocytes, are key in maintaining the normal renal filtration barrier. Although it has been demonstrated that stimulation of c‑Maf inducing protein (CMIP) expression is involved in podocyte damage, the molecular events during this process remain unclear. In the current study, CMIP‑induced proximal signaling was investigated by focusing on its effect on cofilin‑1 activity in puromycin aminonucleoside (PA)‑damaged podocytes. An obvious elevation of CMIP expression and phosphorylated (p) cofilin‑1 levels was detected in cultured podocytes treated with PA and in glomeruli isolated from PA‑induced nephropathy rats...
August 3, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28790854/hypermethylation-of-secreted-frizzled-related-proteins-predicts-poor-prognosis-in-non-m3-acute-myeloid-leukemia
#10
Hong Guo, Ting-Juan Zhang, Xiang-Mei Wen, Jing-Dong Zhou, Ji-Chun Ma, Cui An, Wei Zhang, Zi-Jun Xu, Jiang Lin, Jun Qian
OBJECTIVE: Secreted frizzled-related proteins (SFRPs) as Wnt signaling antagonists have been found to be dysregulated by promoter hypermethylation in several cancers including acute myeloid leukemia (AML). This study aimed to investigate the methylated status of SFRPs promoter region and its clinical relevance in Chinese non-M3 AML patients. METHODS: SFRPs methylation in 139 primary non-M3 AML patients was determined using methylation-specific real-time quantitative polymerase chain reaction...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28789700/two-different-protein-expression-profiles-of-oral-squamous-cell-carcinoma-analyzed-by-immunoprecipitation-high-performance-liquid-chromatography
#11
Soung Min Kim, Dasul Jeong, Min Keun Kim, Sang Shin Lee, Suk Keun Lee
BACKGROUND: Oral squamous cell carcinoma (OSCC) is one of the most dangerous cancers in the body, producing serious complications with individual behaviors. Many different pathogenetic factors are involved in the carcinogenesis of OSCC. Cancer cells derived from oral keratinocytes can produce different carcinogenic signaling pathways through differences in protein expression, but their protein expression profiles cannot be easily explored with ordinary detection methods. METHODS: The present study compared the protein expression profiles between two different types of OSCCs, which were analyzed through immunoprecipitation high-performance liquid chromatography (IP-HPLC)...
August 8, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28780786/-effects-of-subchronic-aluminum-exposure-on-long-term-potentiation-and-activities-of-ras-and-extracellular-regulated-protein-kinases-in-rats
#12
J Song, Z Y Li, L Zhang, Q Niu
Objective: To study the effects of subchronic aluminum exposure on LTP and activities of RAS and ERK in rats in vivo. Methods: 24 Wistar rats were randomly divided into control group、low-dose group、medium-dose group and high-dose group, and received saline (control group) or Al (mal) (3) (15 μmol、kg、30 μmol、kg or 45 μmol/kg) via intraperitoneal injection (i.p.) for 8 weeks, respectively. The fEPSP in CA1 region were recorded by field potentiation technique in vivo and the hippocampal activities of RAS and ERK were examined by ELISA...
May 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28780733/brain-derived-neurotrophic-factor-increases-synaptic-protein-levels-via-the-mapk-erk-signaling-pathway-and-nrf2-trx-axis-following-the-transplantation-of-neural-stem-cells-in-a-rat-model-of-traumatic-brain-injury
#13
Tao Chen, Yu Wu, Yuzi Wang, Jigao Zhu, Haiying Chu, Li Kong, Liangwei Yin, Haiying Ma
Brain-derived neurotrophic factor (BDNF) plays an important role in promoting the growth, differentiation, survival and synaptic stability of neurons. Presently, the transplantation of neural stem cells (NSCs) is known to induce neural repair to some extent after injury or disease. In this study, to investigate whether NSCs genetically modified to encode the BDNF gene (BDNF/NSCs) would further enhance synaptogenesis, BDNF/NSCs or naive NSCs were directly engrafted into lesions in a rat model of traumatic brain injury (TBI)...
August 5, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28777955/supplementation-of-lactobacilli-improves-growth-regulates-microbiota-composition-and-suppresses-skeletal-anomalies-in-juvenile-pike-perch-sander-lucioperca-reared-in-recirculating-aquaculture-system-ras-a-pilot-study
#14
Uros Ljubobratovic, Dejana Kosanovic, Goran Vukotic, Zsuzsanna Molnar, Nemanja Stanisavljevic, Tijana Ristovic, Geza Peter, Jovanka Lukic, Galina Jeney
This research aimed to test the effects of lactobacilli, applied to cultured pike-perch, either through hydrolyzed OTOHIME fish diet, or through Artemia nauplii, on fish growth, microbiota balance and skeletal development. On the 12th Day Post Hatching (DPH) fish were divided into following treatment groups: two groups received the combination of OTOHIME and nauplii enriched either with Lactobacillus paracasei BGHN14+Lactobacillus rhamnosus BGT10 or with Lactobacillus reuteri BGGO6-55+Lactobacillus salivarius BGHO1, and one group received OTOHIME hydrolyzed by BGHN14+BGT10 and non-enriched nauplii...
July 24, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28777121/raf1-variants-causing-biventricular-hypertrophic-cardiomyopathy-in-two-preterm-infants-further-phenotypic-delineation-and-review-of-literature
#15
Danielle Thompson, Jessica Patrick-Esteve, Jeffrey W Surcouf, Dana Rivera, Bianca Castellanos, Pooja Desai, Christian Lilje, Yves Lacassie, Michael Marble, Regina Zambrano
Noonan syndrome (NS) is an autosomal dominant disorder characterized by distinctive facial features, short neck, short stature, congenital heart defects, pectus deformities, and variable developmental delays. NS is genetically heterogeneous as pathogenic variants in several genes involved in the Ras/mitogen-activated protein kinase pathway have been associated with a NS phenotype. Overall, 50% of patients harbor pathogenic variants in PTPN11, whereas 3-17% of patients have variants in RAF1. We present two premature neonates with progressive biventricular hypertrophy found to have RAF1 variants in the CR2 domain...
August 3, 2017: Clinical Dysmorphology
https://www.readbyqxmd.com/read/28774796/synergistic-anti-tumor-effect-of-17aag-with-the-pi3k-mtor-inhibitor-nvp-bez235-on-human-melanoma
#16
R Calero, E Morchon, I Martinez-Argudo, R Serrano
Drug resistance by MAPK signaling recovery or activation of alternative signaling pathways, such as PI3K/AKT/mTOR, is an important factor that limits the long-term efficacy of targeted therapies in melanoma patients. In the present study, we investigated the phospho-proteomic profile of RTKs and its correlation with downstream signaling pathways in human melanoma. We found that tyrosine kinase receptors expression correlated with the expression of pivotal downstream components of the RAS/RAF/MAPK and PI3K/AKT/mTOR pathways in melanoma cell lines and tumors...
August 1, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28772089/fructose-rich-diet-differently-affects-angiotensin-ii-receptors-content-in-the-nucleus-and-a-plasma-membrane-fraction-of-visceral-adipose-tissue
#17
Maja Bundalo, Ana Djordjevic, Biljana Bursac, Maja Zivkovic, Goran Koricanac, Aleksandra Stankovic
The adipose tissue renin-angiotensin system (RAS) is proposed to be a pathophysiological link between adipose tissue dysregulation and metabolic disorders induced by fructose rich diet (FRD). RAS can act intracellularly. We hypothesized that adipocytes nuclear membranes possess angiotensin receptors type 1 and type 2 (AT1R and AT2R) that couple to nuclear signaling pathways and regulate oxidative gene expression under the FRD. We analyzed the effect of nine-week consumption of 10% fructose solution on biochemical parameters, adipocyte morphology and expression of AT1R, AT2R, AT1R-associated protein (ATRAP), NOX4, MMP-9, and MnSOD in adipose tissue of Wistar rats...
August 3, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28771594/patients-experiencing-statin-induced-myalgia-exhibit-a-unique-program-of-skeletal-muscle-gene-expression-following-statin-re-challenge
#18
Marshall B Elam, Gipsy Majumdar, Khyobeni Mozhui, Ivan C Gerling, Santiago R Vera, Hannah Fish-Trotter, Robert W Williams, Richard D Childress, Rajendra Raghow
Statins, the 3-hydroxy-3-methyl-glutaryl (HMG)-CoA reductase inhibitors, are widely prescribed for treatment of hypercholesterolemia. Although statins are generally well tolerated, up to ten percent of statin-treated patients experience myalgia symptoms, defined as muscle pain without elevated creatinine phosphokinase (CPK) levels. Myalgia is the most frequent reason for discontinuation of statin therapy. The mechanisms underlying statin myalgia are not clearly understood. To elucidate changes in gene expression associated with statin myalgia, we compared profiles of gene expression in skeletal muscle biopsies from patients with statin myalgia who were undergoing statin re-challenge (cases) versus those of statin-tolerant controls...
2017: PloS One
https://www.readbyqxmd.com/read/28769798/molecular-characterization-of-somatic-alterations-in-dukes-b-and-c-colorectal-cancers-by-targeted-sequencing
#19
Shafina-Nadiawati Abdul, Nurul-Syakima Ab Mutalib, Khor S Sean, Saiful E Syafruddin, Muhiddin Ishak, Ismail Sagap, Luqman Mazlan, Isa M Rose, Nadiah Abu, Norfilza M Mokhtar, Rahman Jamal
Despite global progress in research, improved screening and refined treatment strategies, colorectal cancer (CRC) remains as the third most common malignancy. As each type of cancer is different and exhibits unique alteration patterns, identifying and characterizing gene alterations in CRC that may serve as biomarkers might help to improve diagnosis, prognosis and predict potential response to therapy. With the emergence of next generation sequencing technologies (NGS), it is now possible to extensively and rapidly identify the gene profile of individual tumors...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28768199/loss-of-brap-results-in-premature-g1-s-phase-transition-and-impeded-neural-progenitor-differentiation
#20
Alison A Lanctot, Yan Guo, Yicong Le, Brittany M Edens, Richard S Nowakowski, Yuanyi Feng
Cells initiate fate decisions during G1 phase by converting extracellular signals into distinctive cell cycle kinetics. The DNA replication timing is determined in G1 phase; lengthened G1 and hastened S phases correlate with increased neurogenic propensity of neural progenitor cells (NPCs), although the underlying molecular control remains elusive. Here, we report that proper G1 phase completion in NPCs requires Brap, a Ras-Erk signaling modulator with ubiquitin E3 ligase activity. We identified Skp2 and Skp2-associated SCF ubiquitin ligase as a key target of Brap-mediated polyubiquitination...
August 1, 2017: Cell Reports
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