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https://www.readbyqxmd.com/read/28731153/altered-profile-of-mrna-expression-in-atrioventricular-node-of-streptozotocin%C3%A2-induced-diabetic-rats
#1
Frank Christopher Howarth, Khatija Parekh, Petrilla Jayaprakash, Edward Samuel Inbaraj, Murat Oz, Halina Dobrzynski, Thomas Edward Adrian
Prolonged action potential duration, reduced action potential firing rate, upstroke velocity and rate of diastolic depolarization have been demonstrated in atrioventricular node (AVN) cells from streptozotocin (STZ)‑induced diabetic rats. To further clarify the molecular basis of these electrical disturbances, the mRNA profiles encoding a variety of proteins associated with the generation and conduction of electrical activity in the AVN, were evaluated in the STZ‑induced diabetic rat heart. Expression of mRNA was measured in AVN biopsies using reverse transcription‑quantitative polymerase chain reaction techniques...
July 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28730896/cannabinoid-hyperemesis-syndrome-potential-mechanisms-for-the-benefit-of-capsaicin-and-hot-water-hydrotherapy-in-treatment
#2
John R Richards, Jeff M Lapoint, Guillermo Burillo-Putze
INTRODUCTION: Cannabinoid hyperemesis syndrome is a clinical disorder that has become more prevalent with increasing use of cannabis and synthetic cannabinoids, and which is difficult to treat. Standard antiemetics commonly fail to alleviate the severe nausea and vomiting characteristic of the syndrome. Curiously, cannabinoid hyperemesis syndrome patients often report dramatic relief of symptoms with hot showers and baths, and topical capsaicin. OBJECTIVES: In this review, we detail the pharmacokinetics and pharmacodynamics of capsaicin and explore possible mechanisms for its beneficial effect, including activation of transient receptor potential vanilloid 1 and neurohumoral regulation...
July 21, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28730833/short-term-administration-of-melatonin-or-ghrelin-on-diabetic-rats-effects-on-angiotensin-ii-and-vasopressin-induced-uterine-contractility
#3
D Sugár, R Agócs, E Tatár, G Tóth, P Horváth, E Sulyok, A J Szabó
The glycosaminoglycan (GAG) molecules are a group of high molecular weight, negatively charged polysaccharides present abundantly in the mammalian organism. By their virtue of ion and water binding capacity, they may affect the redistribution of body fluids and ultimately the blood pressure. Data from the literature suggests that the mitogens Vascular Endothelial Growth Factor (VEGF)-A and VEGF-C are able to regulate the amount and charge density of GAGs and their detachment from the cell surface. Based on these findings we investigated the relationship between the level of dietary sodium intake, the expression levels of VEGF-A and VEGF-C, and the amount of the skin GAGs hyaluronic acid and chondroitin sulphate in an in vivo rat model...
July 18, 2017: Physiological Research
https://www.readbyqxmd.com/read/28729387/leg-blood-flow-is-impaired-during-small-muscle-mass-exercise-in-copd-patients
#4
Ulrik Winning Iepsen, Gregers Druedal Wibe Munch, Mette Rugbjerg, Camilla Koch Ryrsø, Niels Secher, Ylva Hellsten, Peter Lange, Bente Klarlund Pedersen, Pia Thaning, Stefan P Mortensen
Skeletal muscle blood flow is regulated to match the oxygen demand and dysregulation could contribute to exercise intolerance in patients with COPD. We measured leg hemodynamics and metabolites from vasoactive compounds in muscle interstitial fluid and plasma at rest, during one-legged knee-extensor exercise, and during arterial infusions of sodium nitroprusside (SNP) and acetylcholine (ACh), respectively. Ten patients with moderate to severe COPD and eight age- and sex matched healthy controls were studied...
July 20, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28728132/melatonin-protect-the-development-of-preimplantation-mouse-embryos-from-sodium-fluoride-induced-oxidative-injury
#5
Jiamin Zhao, Beibei Fu, Wei Peng, Tingchao Mao, Haibo Wu, Yong Zhang
Recently study shows that melatonin can protect embryos from the culture environment oxidative stress. However, the protective effect of melatonin on the mouse development of preimplantation embryos under sodium fluoride (NaF) induced oxidative stress is still unclear. Here, we showed that exposure to NaF significantly increased the reactive oxygen species (ROS) level, decreased the blastocyst formation rates, and increased the fragmentation, apoptosis and retardation of blastocysts in the development of mouse preimplantation embryos...
June 29, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28728029/peroxidase-mimetic-activity-of-fe3o4-nanoparticle-prepared-based-on-magnetic-hydrogels-for-hydrogen-peroxide-and-glucose-detection
#6
Shasha Song, Yang Liu, Aixin Song, Zengdian Zhao, Hongsheng Lu, Jingcheng Hao
Stimuli-response magnetic hydrogels were prepared in the mixtures of magnetic surfactants, (CnTAFB(C), n=12, 14, 16), and chiral amphiphiles, sodium cholate (SC). The gelation behavior of CnTAFB(C)/SC were studied in detail. The results proved that the hydrophobicity of surfactants and the hydration radius (Rh) of anions played a vital role in the gelation process. The microstructure of the hydrogels were determined to be three-dimensional network of fibrous aggregates. The formation of the hydrogel fibrils was considered to be mainly driven by a delicate balance of multiple non-covalent interactions including hydrophobic interaction, electrostatic interaction, hydrogen bonding, van der Waals force, and the steric effect of SC molecule...
July 10, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28727112/effect-of-in-ovo-feeding-of-l-arginine-on-the-hatchability-growth-performance-gastrointestinal-hormones-and-jejunal-digestive-and-absorptive-capacity-of-posthatch-broilers
#7
T Gao, M Zhao, L Zhang, J Li, L Yu, P Lv, F Gao, G Zhou
This study was conducted to investigate the effects of in ovo feeding (IOF) of Arg solution on the hatchability, growth performance, gastrointestinal hormones, serum AA, activities of digestive enzymes, and mRNA expressions of sensing receptors and nutrient transporters in the jejunum of posthatch broilers. One thousand two hundred embryonated eggs with similar weight were randomly allocated to 5 groups consisting of 8 replicates of 40 eggs each. The 5 treatments were arranged as a noninjected control, a diluent-injected (0...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726540/mechanisms-of-the-analgesic-effect-of-calcitonin-on-chronic-pain-by-alteration-of-receptor-or-channel-expression
#8
Akitoshi Ito, Megumu Yoshimura
The polypeptide hormone calcitonin is well known clinically for its ability to relieve osteoporotic back pain and neuropathic pain such as spinal canal stenosis, diabetic neuropathy, chemotherapy-induced neuropathy, and complex regional pain syndrome. Because the analgesic effects of calcitonin have a broad range, the underlying mechanisms of pain relief by calcitonin are largely unknown. However, recent studies using several types of chronic pain models combined with various methods have been gradually clarifying the mechanism...
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28724838/csk-regulates-blood-pressure-by-controlling-the-synthetic-pathways-of-aldosterone
#9
Sung-Moon Kim, Ji-One Kang, Ji Eun Lim, Sue-Yun Hwang, Bermseok Oh
BACKGROUND: Blood pressure is regulated by a network of diverse physiological pathways. The C-terminal Src kinase (CSK) locus (15q24) is associated with blood pressure in various ethnic groups. It was recently reported thatCskinsufficiency increases blood pressure through Src. The mechanisms of hypertension inCsk(+/-)mice are examined further in this study.Methods and Results:To identify a causal component responsible for hypertension inCsk(+/-), the heart rate was measured by electrocardiogram and plasma volume by Evans blue dilution...
July 20, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28720798/neuroprotective-effect-of-5-aminolevulinic-acid-against-low-inorganic-phosphate-in-neuroblastoma-sh-sy5y-cells
#10
Naoko Takase, Masatoshi Inden, Shin-Ichiro Sekine, Yumi Ishii, Hiroko Yonemitsu, Wakana Iwashita, Hisaka Kurita, Yutaka Taketani, Isao Hozumi
PiT-1 (encoded by SLC20A1) and PiT-2 (encoded by SLC20A2) are type-III sodium-dependent phosphate cotransporters (NaPiTs). Recently, SLC20A2 mutations have been found in patients with idiopathic basal ganglia calcification (IBGC), and were predicted to bring about an inability to transport Pi from the extracellular environment. Here we investigated the effect of low Pi loading on the human neuroblastoma SH-SY5Y and the human glioblastoma A172 cell lines. The results show a different sensitivity to low Pi loading and differential regulation of type-III NaPiTs in these cells...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28718687/do-sodium-channel-proteolytic-fragments-regulate-sodium-channel-expression
#11
Donatus O Onwuli, Laia Yañez-Bisbe, Mellina Pinsach-Abuin, Anna Tarradas, Ramon Brugada, John Greenman, Sara Pagans, Pedro Beltran-Alvarez
The cardiac voltage-gated sodium channel (gene: SCN5A, protein: NaV1.5) is responsible for the sodium current that initiates the cardiomyocyte action potential. Research into the mechanisms of SCN5A gene expression has gained momentum over the last few years. We have recently described the transcriptional regulation of SCN5A by GATA4 transcription factor. In this addendum to our study, we report our observations that 1) the linker between domains I and II (LDI-DII) of NaV1.5 contains a nuclear localisation signal (residues 474-481) that is necessary to localise LDI-DII into the nucleus, and 2) nuclear LDI-DII activates the SCN5A promoter in gene reporter assays using cardiac-like H9c2 cells...
July 18, 2017: Channels
https://www.readbyqxmd.com/read/28716819/effect-of-type-2-diabetes-surgical-incision-and-volatile-anesthesia-on-hemodynamics-in-the-rat
#12
Carol T Bussey, Regis R Lamberts
Diabetic patients have increased cardiac complications during surgery, possibly due to impaired autonomic regulation. Anesthesia lowers blood pressure and heart rate (HR), whereas surgical intervention has opposing effects. The interaction of anesthesia and surgical intervention on hemodynamics in diabetes is unknown, despite being a potential perioperative risk factor. We aimed to determine the effect of diabetes on the integrative interaction between hemodynamics, anesthesia, and surgical incision. Zucker type 2 diabetic rats (DM) and their nondiabetic littermates (ND) were implanted with an intravenous port for drug delivery, and a radiotelemeter to measure mean arterial blood pressure (MAP) and derive HR (total n = 50)...
July 2017: Physiological Reports
https://www.readbyqxmd.com/read/28713986/hydrogen-sulfide-prevents-homocysteine%C3%A2-induced-endoplasmic-reticulum-stress-in-pc12-cells-by-upregulating-sirt%C3%A2-1
#13
Chun-Yan Wang, Wei Zou, Xiao-Yu Liang, Zhi-Sheng Jiang, Xiang Li, Hai-Jun Wei, Yi-Yun Tang, Ping Zhang, Xiao-Qing Tang
It was previously confirmed that hydrogen sulfide (H2S) has a neuroprotective effect, preventing homocysteine‑induced neurotoxicity. However, the exact molecular mechanisms underlying this protective effect remain to be fully elucidated. Endoplasmic reticulum (ER) stress contributes to homocysteine‑induced neurotoxicity. Silent mating type information regulator 2 homolog 1 (SIRT‑1) can attenuate ER stress, exerting its neuroprotective effect. Therefore, the present study aimed to investigate whether H2S protects PC12 cells against homocysteine‑induced ER stress and whether SIRT‑1 mediates this protective effect of H2S...
July 15, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28713897/expression-of-irak%C3%A2-3-is-associated-with-colitis%C3%A2-associated-tumorigenesis-in-mice
#14
Dingting Xu, Hanyun Zhang, Xiaoying Wang, Yan Chen
Interleukin‑1 receptor‑associated kinase‑3 (IRAK‑3) is a negative regulator in Toll‑like receptor (TLR) pathways. The present study investigated the importance of IRAK‑3 in a mouse model of chemically‑induced colitis‑associated tumorigenesis. The colitis‑associated tumorigenesis was induced in ICR mice by the administration of 1,2‑dimethyl hydrazine (DMH) and dextran sodium sulfate (DSS), termed the DMH + DSS group. In the DSS group, mice were administered with DSS; in the DMH group, mice were injected with DMH; in the control group, mice were injected with physiological saline...
July 12, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28711506/sodium-selenate-activated-wnt-%C3%AE-catenin-signaling-and-repressed-amyloid-%C3%AE-formation-in-a-triple-transgenic-mouse-model-of-alzheimer-s-disease
#15
Na Jin, Huazhang Zhu, Xiao Liang, Wei Huang, Qingguo Xie, Peng Xiao, Jiazuan Ni, Qiong Liu
Accumulating evidences show that selenium dietary intake is inversely associated with the mortality of Alzheimer's disease (AD). Sodium selenate has been reported to reduce neurofibrillary tangles (NFT) in the tauopathic mouse models, but its effects on the Wnt/β-catenin signaling pathway and APP processing remain unknown during AD formation. In this paper, triple transgenic AD mice (3×Tg-AD) had been treated with sodium selenate in drinking water for 10month before the detection of hippocampal pathology...
July 12, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28710114/circadian-rhythm-disruption-impairs-tissue-homeostasis-and-exacerbates-chronic-inflammation-in-the-intestine
#16
René Pagel, Florian Bär, Torsten Schröder, Annika Sünderhauf, Axel Künstner, Saleh M Ibrahim, Stella E Autenrieth, Kathrin Kalies, Peter König, Anthony H Tsang, Dominik Bettenworth, Senad Divanovic, Hendrik Lehnert, Klaus Fellermann, Henrik Oster, Stefanie Derer, Christian Sina
Endogenous circadian clocks regulate 24 h rhythms of physiology and behavior. Circadian rhythm disruption (CRD) is suggested as a risk factor for inflammatory bowel disease. However, the underlying molecular mechanisms remain unknown. Intestinal biopsies from Per1/2 mutant and wild-type (WT) mice were investigated by electron microscopy, immunohistochemistry, and bromodeoxyuridine pulse-chase experiments. TNF-α was injected intraperitoneally, with or without necrostatin-1, into Per1/2 mice or rhythmic and externally desynchronized WT mice to study intestinal epithelial cell death...
July 14, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28706529/bacillus-licheniformis-sa03-confers-increased-saline-alkaline-tolerance-in-chrysanthemum-plants-by-induction-of-abscisic-acid-accumulation
#17
Cheng Zhou, Lin Zhu, Yue Xie, Feiyue Li, Xin Xiao, Zhongyou Ma, Jianfei Wang
Soil saline-alkalization is a major abiotic stress that leads to low iron (Fe) availability and high toxicity of sodium ions (Na(+)) for plants. It has recently been shown that plant growth promoting rhizobacteria (PGPR) can enhance the ability of plants to tolerate multiple abiotic stresses such as drought, salinity, and nutrient deficiency. However, the possible involvement of PGPR in improving saline-alkaline tolerance of plants and the underlying mechanisms remain largely unknown. In this study, we investigated the effects of Bacillus licheniformis (strain SA03) on the growth of Chrysanthemum plants under saline-alkaline conditions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28701749/calcium-activated-sk-channels-control-firing-regularity-by-modulating-sodium-channel-availability-in-midbrain-dopamine-neurons
#18
Rajeshwari Iyer, Mark A Ungless, Aldo A Faisal
Dopamine neurons in the substantia nigra pars compacta and ventral tegmental area regulate behaviours such as reward-related learning, and motor control. Dysfunction of these neurons is implicated in Schizophrenia, addiction to drugs, and Parkinson's disease. While some dopamine neurons fire single spikes at regular intervals, others fire irregular single spikes interspersed with bursts. Pharmacological inhibition of calcium-activated potassium (SK) channels increases the variability in their firing pattern, sometimes also increasing the number of spikes fired in bursts, indicating that SK channels play an important role in maintaining dopamine neuron firing regularity and burst firing...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28701721/tsg-6-secreted-by-human-adipose-tissue-derived-mesenchymal-stem-cells-ameliorates-dss-induced-colitis-by-inducing-m2-macrophage-polarization-in-mice
#19
Woo-Jin Song, Qiang Li, Min-Ok Ryu, Jin-Ok Ahn, Dong Ha Bhang, Yun Chan Jung, Hwa-Young Youn
Previous studies have revealed that mesenchymal stem cells (MSCs) alleviate inflammatory bowel disease (IBD) by modulating inflammatory cytokines in the inflamed intestine. However, the mechanisms underlying these effects are not completely understood. We sought to investigate the therapeutic effects of human adipose tissue-derived (hAT)-MSCs in an IBD mouse model and to explore the mechanisms of the regulation of inflammation. Dextran sulfate sodium-induced colitis mice were infused with hAT-MSCs intraperitoneally and colon tissues were collected on day 10...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28701396/effects-of-the-nedd8-activating-enzyme-inhibitor-mln4924-on-lytic-reactivation-of-kaposi-s-sarcoma-associated-herpesvirus
#20
Pey-Jium Chang, Lee-Wen Chen, Li-Yu Chen, Chien-Hui Hung, Ying-Ju Shih, Shie-Shan Wang
The switch of Kaposi's sarcoma-associated herpesvirus (KSHV) from latency to lytic replication is a key event for viral dissemination and pathogenesis. MLN4924, a novel neddylation inhibitor, reportedly causes the onset of KSHV reactivation but impairs later phases of viral lytic program in infected cells. Thus far, the molecular mechanism involved in the modulation of KSHV lytic cycle by MLN4924 is not yet fully understood. Here, we confirmed that treatment of different KSHV-infected primary effusion lymphoma (PEL) cell lines with MLN4924 substantially induces viral lytic protein expression...
July 12, 2017: Journal of Virology
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