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Homeostasis

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https://www.readbyqxmd.com/read/29454273/mechanosensitive-adhesion-complexes-in-epithelial-architecture-and-cancer-onset
#1
REVIEW
Minerva Bosch-Fortea, Fernando Martín-Belmonte
Mechanical signals from the extracellular space are paramount to coordinate tissue morphogenesis and homeostasis. Although there is a wide variety of cellular mechanisms involved in transducing extracellular forces, recent literature emphasizes the central role of two main adhesion complexes in epithelial mechanosensitive processes: focal adhesions and adherens junctions. These biomechanical sensors can decode physical signals such as matrix stiffness or intercellular tension into a wide range of coordinated cellular responses, which can impact cell differentiation, migration, and proliferation...
February 14, 2018: Current Opinion in Cell Biology
https://www.readbyqxmd.com/read/29454114/mitochondria-targeting-mitochondrial-reactive-oxygen-species-with-mitochondriotropic-polyphenolic-based-antioxidants
#2
José Teixeira, Cláudia M Deus, Fernanda Borges, Paulo J Oliveira
Mitochondrial function and regulation of redox balance is fundamental in controlling cellular life and death pathways. Antioxidants have been used to counteract disruption of redox networks, normally associated with progressive loss of cell homeostasis and disease pathophysiology, although therapeutic success is limited mainly due to pharmacokinetic drawbacks. Attempts to improve mitochondrial function in a range of diseases spurred active drug discovery efforts. Currently, the most effective strategy to deliver drugs to mitochondria is the covalent link of lipophilic cations to the bioactive compound...
February 14, 2018: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29454012/immunologic-effects-of-chronic-administration-of-tofacitinib-a-janus-kinase-inhibitor-in-cynomolgus-monkeys-and-rats-comparison-of-juvenile-and-adult-responses
#3
Mark Collinge, Douglas J Ball, Christopher J Bowman, Andrea L Nilson, Zaher A Radi, W Mark Vogel
Tofacitinib, an oral Janus kinase (JAK) inhibitor for treatment of rheumatoid arthritis, targets JAK1, JAK3, and to a lesser extent JAK2 and TYK2. JAK1/3 inhibition impairs gamma common chain cytokine receptor signaling, important in lymphocyte development, homeostasis and function. Adult and juvenile cynomolgus monkey and rat studies were conducted and the impact of tofacitinib on immune parameters (lymphoid tissues and lymphocyte subsets) and function (T-dependent antibody response (TDAR), mitogen-induced T cell proliferation) assessed...
February 14, 2018: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/29453982/glucagon-like-peptide-1-contributes-to-increases-abca1-expression-by-downregulating-mir-758-to-regulate-cholesterol-homeostasis
#4
Yue Yao, Qiang Li, Ping Gao, Wei Wang, Lili Chen, Jinchao Zhang, Yi Xu
Abnormal regulation of lipid metabolism is associated with type 2 diabetes mellitus (T2DM). GLP-1 as a new treatment for T2DM, has unique effects in modulating cholesterol homeostasis. However, the mechanism of this effect is largely missing. The aim of this study was to determine the effects of GLP-1 on cholesterol-induced lipotoxicity in hepatocytes and examine the underlying mechanisms. The cell viability was determined, and caspase-3 was used to detect the effects of GLP-1 on cholesterol-induced apoptosis...
February 14, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29453945/evaluation-of-lipid-peroxidation-and-antioxidant-defense-mechanisms-in-the-bone-of-rats-in-conditions-of-separate-and-combined-administration-of-vanadium-v-and-magnesium-mg
#5
Agnieszka Ścibior, Dorota Gołębiowska, Agnieszka Adamczyk, Joanna Kurus, Magdalena Staniszewska, Ilona Sadok
The impact of vanadium (V) and magnesium (Mg) applied as sodium metavanadate (SMV, 0.125 mg V/ml) and magnesium sulfate (MS, 0.06 mg Mg/ml) on oxidative stress markers in bone of male Wistar rats was investigated. Some of them were also measured in the liver, e.g. l-ascorbic acid (hepatic L-AA). Additionally, relationships between selected indices determined in bone were examined. SMV alone (Group II) did not significantly alter the level of TBARS and the activity of SOD, compared with the control (Group I), but it slightly reduced the GR activity (by 13%) and the L-AA level (by 15...
February 14, 2018: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29453864/-lpcat1-controls-phosphate-homeostasis-in-a-zinc-dependent-manner
#6
Mushtak Kisko, Nadia Bouain, Alaeddine Safi, Anna Medici, Robert C Akkers, David Secco, Gilles Fouret, Gabriel Krouk, Mark Gm Aarts, Wolfgang Busch, Hatem Rouached
All living organisms require a variety of essential elements for their basic biological functions. While the homeostasis of nutrients is highly intertwined, the molecular and genetic mechanisms of these dependencies remains poorly understood. Here, we report a discovery of a molecular pathway that control phosphate (Pi) accumulation plants in Zn deficiency. Using genome-wide association studies we first identified allelic variation of the Lyso-PhosphatidylCholine (PC) AcylTransferase 1 ( LPCAT1 ) gene as the key determinant of shoot Pi accumulation under Zn deficiency...
February 17, 2018: ELife
https://www.readbyqxmd.com/read/29453850/the-role-of-the-immune-system-in-kidney-disease
#7
REVIEW
Josefine Tecklenborg, David Clayton, Stefan Siebert, Shana M Coley
The immune system and the kidneys are closely linked. In health the kidneys contribute to immune homeostasis, while components of the immune system mediate many acute forms of renal disease and play a central role in progression of chronic kidney disease. A dysregulated immune system can have either direct or indirect renal effects. Direct immune-mediated kidney diseases are usually a consequence of autoantibodies directed against a constituent renal antigen, such as collagen IV in anti-glomerular basement membrane disease...
February 17, 2018: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/29453818/the-association-between-thyroid-function-and-incidence-of-metabolic-syndrome-in-euthyroid-subjects-tianjin-chronic-low-grade-systemic-inflammation-and-health-cohort-study
#8
Yeqing Gu, Yanyan Wang, Qing Zhang, Li Liu, Ge Meng, Zhanxin Yao, Hongmei Wu, Yang Xia, Xue Bao, Hongbin Shi, Honglei Wang, Shaomei Sun, Xing Wang, Ming Zhou, Qiyu Jia, Kun Song, Kaijun Niu
OBJECTIVE: Thyroid hormones (THs) are primarily responsible for the regulation of energy homeostasis and metabolism. However, few prospective studies have assessed the association between THs and metabolic syndrome (MetS) in a general population. We therefore designed a cohort study to examine whether serum THs levels within the reference range are predictive factors for developing MetS in adults. DESIGN: Prospective cohort study. PARTICIPANTS: A prospective study (n=6,119) was performed in Tianjin, China...
February 17, 2018: Clinical Endocrinology
https://www.readbyqxmd.com/read/29453696/interrelationship-between-diabetes-mellitus-and-heart-failure-the-role-of-peroxisome-proliferator-activated-receptors-in-left-ventricle-performance
#9
REVIEW
Evangelos Oikonomou, Konstantinos Mourouzis, Petros Fountoulakis, Georgios Angelos Papamikroulis, Gerasimos Siasos, Alexis Antonopoulos, Georgia Vogiatzi, Sotiris Tsalamadris, Manolis Vavuranakis, Dimitris Tousoulis
Heart failure (HF) is a common cardiac syndrome, whose pathophysiology involves complex mechanisms, some of which remain unknown. Diabetes mellitus (DM) constitutes not only a glucose metabolic disorder accompanied by insulin resistance but also a risk factor for cardiovascular disease and HF. During the last years though emerging data set up, a bidirectional interrelationship between these two entities. In the case of DM impaired calcium homeostasis, free fatty acid metabolism, redox state, and advance glycation end products may accelerate cardiac dysfunction...
February 17, 2018: Heart Failure Reviews
https://www.readbyqxmd.com/read/29453656/the-ferroportin-ceruloplasmin-system-and-the-mammalian-iron-homeostasis-machine-regulatory-pathways-and-the-role-of-lactoferrin
#10
Maria Carmela Bonaccorsi di Patti, Antimo Cutone, Fabio Polticelli, Luigi Rosa, Maria Stefania Lepanto, Piera Valenti, Giovanni Musci
In the last 20 years, several new genes and proteins involved in iron metabolism in eukaryotes, particularly related to pathological states both in animal models and in humans have been identified, and we are now starting to unveil at the molecular level the mechanisms of iron absorption, the regulation of iron transport and the homeostatic balancing processes. In this review, we will briefly outline the general scheme of iron metabolism in humans and then focus our attention on the cellular iron export system formed by the permease ferroportin and the ferroxidase ceruloplasmin...
February 16, 2018: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/29453570/molecular-mechanisms-and-signaling-pathways-involved-in-the-nutritional-support-of-spermatogenesis-by-sertoli-cells
#11
Luís Crisóstomo, Marco G Alves, Agostina Gorga, Mário Sousa, María F Riera, María N Galardo, Silvina B Meroni, Pedro F Oliveira
Sertoli cells play a central role in spermatogenesis. They maintain the blood-testis barrier, an essential feature of seminiferous tubules which creates the proper environment for the occurrence of the spermatogenesis. However, this confinement renders germ cells almost exclusively dependent on Sertoli cells' nursing function and support. Throughout spermatogenesis, differentiating sperm cells become more specialized, and their biochemical machinery is insufficient to meet their metabolic demands. Although the needs are not the same at all differentiation stages, Sertoli cells are able to satisfy their needs...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29453559/regulation-of-h-pyrophosphatase-by-14-3-3-proteins-from-arabidopsis-thaliana
#12
Yu-Di Hsu, Yu-Fen Huang, Yih-Jiuan Pan, Li-Kun Huang, Ya-Yun Liao, Wei-Hua Lin, Tzu-Yin Liu, Ching-Hung Lee, Rong-Long Pan
Plant vacuolar H + -transporting inorganic pyrophosphatase (V-PPase; EC 3.6.1.1) is a crucial enzyme that exists on the tonoplast to maintain pH homeostasis across the vacuolar membrane. This enzyme generates proton gradient between cytosol and vacuolar lumen by hydrolysis of a metabolic byproduct, pyrophosphate (PP i ). The regulation of V-PPase at protein level has drawn attentions of many workers for decades, but its mechanism is still unclear. In this work, we show that AVP1, the V-PPase from Arabidopsis thaliana, is a target protein for regulatory 14-3-3 proteins at the vacuolar membrane, and all twelve 14-3-3 isoforms were analyzed for their association with AVP1...
February 16, 2018: Journal of Membrane Biology
https://www.readbyqxmd.com/read/29453535/toxicity-of-metal-oxide-nanoparticles
#13
Koyeli Girigoswami
In the recent times, nanomaterials are used in many sectors of science, medicine and industry, without revealing its toxic effects. Thus, it is in urgent need for exploring the toxicity along with the application of such useful nanomaterials. Nanomaterials are categorized with a particle size of 1-100 nm. They have gained increasing attention because of their novel properties, including a large specific surface area and high reaction activity. The various fundamental and practical applications of nanomaterials include drug delivery, cell imaging, and cancer therapy...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29453427/orthodox-religious-fasting-as-a-medical-nutrition-therapy-for-dyslipidemia-where-do-we-stand-and-how-far-can-we-go
#14
REVIEW
Theocharis Koufakis, Spyridon N Karras, Pantelis Zebekakis, Kalliopi Kotsa
Previous studies have reported inconclusive results regarding the effects of Orthodox religious fasting (OF) on common cardiovascular risk factors, including arterial hypertension and diabetes. Contrariwise, an optimal effect on dyslipidemia has been demonstrated and significant reductions in total cholesterol (TC) and low-density lipoprotein-cholesterol (LDL-C) concentrations, in Orthodox populations without comorbidities, have been consistently reported. This favorable effect on lipid homeostasis is probably facilitated by a broad lifestyle modification related to OF, extended beyond dietary habits...
February 16, 2018: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29453425/chronic-treatment-with-fluoride-affects-the-jejunum-insights-from-proteomics-and-enteric-innervation-analysis
#15
Aline Salgado Dionizio, Carina Guimarães Souza Melo, Isabela Tomazini Sabino-Arias, Talita Mendes Silva Ventura, Aline Lima Leite, Sara Raquel Garcia Souza, Erika Xavier Santos, Alessandro Domingues Heubel, Juliana Gadelha Souza, Juliana Vanessa Colombo Martins Perles, Jacqueline Nelisis Zanoni, Marília Afonso Rabelo Buzalaf
Gastrointestinal symptoms are the first signs of fluoride (F) toxicity. In the present study, the jejunum of rats chronically exposed to F was evaluated by proteomics, as well as by morphological analysis. Wistar rats received water containing 0, 10 or 50 mgF/L during 30 days. HuC/D, neuronal Nitric Oxide (nNOS), Vasoactive Intestinal Peptide (VIP), Calcitonin Gene Related Peptide (CGRP), and Substance P (SP) were detected in the myenteric plexus of the jejunum by immunofluorescence. The density of nNOS-IR neurons was significantly decreased (compared to both control and 10 mgF/L groups), while the VIP-IR varicosities were significantly increased (compared to control) in the group treated with the highest F concentration...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29453334/%C3%AE-catenin-independent-regulation-of-wnt-target-genes-by-ror2-and-atf2-atf4-in-colon-cancer-cells
#16
Oksana Voloshanenko, Uwe Schwartz, Dominique Kranz, Benedikt Rauscher, Michael Linnebacher, Iris Augustin, Michael Boutros
Wnt signaling is an evolutionarily conserved signaling route required for development and homeostasis. While canonical, β-catenin-dependent Wnt signaling is well studied and has been linked to many forms of cancer, much less is known about the role of non-canonical, β-catenin-independent Wnt signaling. Here, we aimed at identifying a β-catenin-independent Wnt target gene signature in order to understand the functional significance of non-canonical signaling in colon cancer cells. Gene expression profiling was performed after silencing of key components of Wnt signaling pathway and an iterative signature algorithm was applied to predict pathway-dependent gene signatures...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29453283/chemical-stresses-fail-to-mimic-the-unfolded-protein-response-resulting-from-luminal-load-with-unfolded-polypeptides
#17
Timothy J Bergmann, Ilaria Fregno, Fiorenza Fumagalli, Andrea Rinaldi, Francesco Bertoni, Paul J Boersema, Paola Picotti, Maurizio Molinari
The stress sensors ATF6, IRE1 and PERK monitor deviations from homeostatic conditions in the endoplasmic reticulum (ER), a protein biogenesis compartment of eukaryotic cells. Their activation elicits unfolded protein responses (UPR) to re-establish proteostasis. UPR have been extensively investigated in cells exposed to chemicals that activate ER stress sensors by perturbing calcium, N-glycans or redox homeostasis. Cell responses to variations in luminal load with unfolded proteins are, in contrast, poorly characterized...
February 16, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29453041/microrna-signature-of-regulatory-t-cells-in-health-and-autoimmunity
#18
REVIEW
Mehdi Soltanzadeh-Yamchi, Mehdi Shahbazi, Saeed Aslani, Mousa Mohammadnia-Afrouzi
MicroRNAs (miRNAs) are small RNA molecules with regulatory functions on the expression of genes through binding directly to target messenger RNA (mRNA) transcripts, eventuating in gene expression suppression via translational hindrance and/or target mRNA cleavage. These molecules have been established to participate in numerous critical cellular settings, including differentiation, development, and function of immune cells. As an important suppressor cell of immune system, regulatory T cells (Tregs) are important in modulating the immune homeostasis as well as tolerance to self-antigens...
February 13, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29452889/anthropometric-and-biochemical-determinants-of-estimated-glomerular-filtration-rate-in-a-large-cohort-of-obese-children
#19
Pierluigi Marzuillo, Anna Grandone, Anna Di Sessa, Stefano Guarino, Mario Diplomatico, Giuseppina Rosaria Umano, Cesare Polito, Angela La Manna, Laura Perrone, Emanuele Miraglia Del Giudice
OBJECTIVE: We aimed to investigate which clinical and metabolic factors could influence the estimated glomerular filtration rate (eGFR) levels, evaluating a large population of obese children without suspect of primary kidney disease. DESIGN: Retrospective, cross-sectional study. SETTING: Pediatric university department. SUBJECTS: We enrolled 2,957 obese children and adolescents consecutively attending our department between January 2000 and 2017...
February 13, 2018: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/29452886/shifting-the-igf-axis-an-age-related-decline-in-human-tear-igf-1-correlates-with-clinical-signs-of-dry-eye
#20
Roshni Patel, Meifang Zhu, Danielle M Robertson
OBJECTIVE: The human corneal epithelium expresses both the insulin-like growth factor type 1 receptor (IGF-1R) and the IGF-1R/insulin receptor (INSR) hybrid. Despite the previous identification of IGF-1 in human tear fluid, little is known regarding the regulation of IGF-1 in tear fluid and its role in corneal epithelial homeostasis. In the present study, we investigated the impact of biological parameters on the concentration of human tear levels of IGF-1. DESIGN: Tear levels of IGF-1 were measured in 41 healthy, human volunteers without any reported symptoms of dry eye...
February 6, 2018: Growth Hormone & IGF Research
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